{"id":105271,"date":"2026-09-15T07:40:56","date_gmt":"2026-09-14T23:40:56","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/105271.html"},"modified":"2026-09-15T07:40:56","modified_gmt":"2026-09-14T23:40:56","slug":"02%ef%bd%9csre%ef%bc%9aslo%e3%80%81sli%e3%80%81error-budget-%e6%98%af-aiops-%e7%9a%84%e5%9c%b0%e5%9f%ba","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/105271.html","title":{"rendered":"02\uff5cSRE\uff1aSLO\u3001SLI\u3001Error Budget \u662f AIOps \u7684\u5730\u57fa"},"content":{"rendered":"<p>\u9762\u5411 ITOps Agent Platform \u7cfb\u5217\u7b2c 2 \u7bc7\u3002\u5148\u5b66&#034;\u4ec0\u4e48\u53eb\u7cfb\u7edf\u5065\u5eb7&#034;&#xff0c;\u518d\u5b66 AI \u5982\u4f55\u5224\u65ad\u7cfb\u7edf\u5065\u5eb7\u3002<\/p>\n<h3>1. \u4e3a\u4ec0\u4e48\u8fd9\u4e2a\u95ee\u9898\u91cd\u8981<\/h3>\n<p>\u5982\u679c AIOps \u4e0d\u77e5\u9053&#034;\u4ec0\u4e48\u662f\u5065\u5eb7&#034;&#xff0c;\u5b83\u7684\u4e00\u5207\u5224\u65ad\u90fd\u662f\u7a7a\u4e2d\u697c\u9601\u3002SLO\/SLI\/Error Budget \u63d0\u4f9b\u4e86\u53ef\u5ea6\u91cf\u7684\u53ef\u9760\u6027\u76ee\u6807&#xff0c;\u662f AI \u5224\u65ad\u7cfb\u7edf\u5065\u5eb7\u4e0e\u5426\u7684\u552f\u4e00\u5c3a\u5ea6\u3002<\/p>\n<h3>2. \u524d\u6cbf\u6280\u672f\u8d8b\u52bf<\/h3>\n<p>Google SRE \u5c06 error budget \u7528\u4f5c\u53ef\u9760\u6027\u4e0e\u53d8\u66f4\u901f\u5ea6\u4e4b\u95f4\u7684\u63a7\u5236\u673a\u5236\u3002AIOps \u7684\u6f14\u8fdb\u65b9\u5411&#xff0c;\u662f\u8ba9\u544a\u8b66\u3001\u4f18\u5148\u7ea7\u3001\u81ea\u52a8\u5316\u7b56\u7565\u90fd\u56f4\u7ed5 error budget \u5c55\u5f00&#xff0c;\u800c\u975e\u56f4\u7ed5\u5b64\u7acb\u7684\u8d44\u6e90\u9608\u503c&#xff08;\u5982 CPU &gt; 80%&#xff09;\u3002<\/p>\n<h3>3. \u6838\u5fc3\u6982\u5ff5<\/h3>\n<h4>SLI&#xff08;Service Level Indicator&#xff09;<\/h4>\n<p>\u7528\u6237\u771f\u6b63\u611f\u77e5\u7684\u6307\u6807&#xff1a;availability\u3001latency\u3001correctness\u3001freshness\u3001durability\u3002<\/p>\n<h4>SLO&#xff08;Service Level Objective&#xff09;<\/h4>\n<p>99.95% availability<br \/>\nP99 latency &lt; 500ms<br \/>\n99.9% successful checkout<\/p>\n<h4>Error Budget<\/h4>\n<p>error_budget &#061; 1 &#8211; SLO<\/p>\n<p>\u4e00\u4e2a 99.9% SLO \u7684\u670d\u52a1&#xff0c;\u5728\u5bf9\u5e94\u7a97\u53e3\u5185 error budget \u5c31\u662f 0.1%\u3002AIOps \u4e0d\u5e94\u53ea\u95ee&#034;CPU \u662f\u5426\u8d85\u8fc7 80%\u201c&#xff0c;\u800c\u5e94\u95ee&#034;\u5f53\u524d\u5f02\u5e38\u662f\u5426\u6b63\u5728\u6d88\u8017\u4e1a\u52a1 error budget\u201d\u3002<\/p>\n<h3>4. ITOps Agent Platform \u4e2d\u7684\u5bf9\u5e94\u6a21\u5757<\/h3>\n<p>SLO Agent \u2192 Budget Calculator \u2192 Incident Priority \u2192 Automation Policy<\/p>\n<h3>5. \u67b6\u6784\u8bbe\u8ba1<\/h3>\n<p>\u628a\u53ef\u9760\u6027\u76ee\u6807\u4e0b\u6c89\u5230\u81ea\u52a8\u5316\u51b3\u7b56&#xff1a;<\/p>\n<p>SLO \u5b9a\u4e49<br \/>\n   \u2193<br \/>\nError Budget \u5b9e\u65f6\u8ba1\u7b97<br \/>\n   \u2193<br \/>\nIncident \u4f18\u5148\u7ea7\u6620\u5c04<br \/>\n   \u2193<br \/>\n\u81ea\u52a8\u5316\u6743\u9650\u5206\u7ea7&#xff08;\u9884\u7b97\u5145\u8db3\u2192\u53ef\u81ea\u52a8&#xff0c;\u9884\u7b97\u8017\u5c3d\u2192\u5f3a\u5236\u4eba\u5de5&#xff09;<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u57fa\u4e8e error budget \u5269\u4f59\u91cf\u81ea\u52a8\u8c03\u6574\u81ea\u52a8\u5316\u6743\u9650\u7684\u793a\u4f8b\u914d\u7f6e&#xff1a;<\/p>\n<p><span class=\"token key atrule\">automation_policy<\/span><span class=\"token punctuation\">:<\/span><br \/>\n  <span class=\"token key atrule\">service<\/span><span class=\"token punctuation\">:<\/span> payment<span class=\"token punctuation\">&#8211;<\/span>api<br \/>\n  <span class=\"token comment\"># \u4ee5 30 \u5929\u7a97\u53e3\u7684 error budget \u5269\u4f59\u6bd4\u4f8b\u4e3a\u51b3\u7b56\u4f9d\u636e<\/span><br \/>\n  <span class=\"token key atrule\">error_budget_levels<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> healthy<br \/>\n      <span class=\"token key atrule\">remaining_budget<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;&gt;&#061; 50%&#034;<\/span><br \/>\n      <span class=\"token key atrule\">automation<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token key atrule\">enabled<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token boolean important\">true<\/span><br \/>\n        <span class=\"token key atrule\">allowed_actions<\/span><span class=\"token punctuation\">:<\/span><br \/>\n          <span class=\"token punctuation\">&#8211;<\/span> restart_pod<br \/>\n          <span class=\"token punctuation\">&#8211;<\/span> scale_out<br \/>\n          <span class=\"token punctuation\">&#8211;<\/span> rollback_release<br \/>\n        <span class=\"token key atrule\">approval<\/span><span class=\"token punctuation\">:<\/span> none<\/p>\n<p>    <span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> degraded<br \/>\n      <span class=\"token key atrule\">remaining_budget<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;&gt;&#061; 20%&#034;<\/span><br \/>\n      <span class=\"token key atrule\">automation<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token key atrule\">enabled<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token boolean important\">true<\/span><br \/>\n        <span class=\"token key atrule\">allowed_actions<\/span><span class=\"token punctuation\">:<\/span><br \/>\n          <span class=\"token punctuation\">&#8211;<\/span> restart_pod<br \/>\n          <span class=\"token punctuation\">&#8211;<\/span> scale_out<br \/>\n        <span class=\"token key atrule\">approval<\/span><span class=\"token punctuation\">:<\/span> auto_ticket<\/p>\n<p>    <span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> critical<br \/>\n      <span class=\"token key atrule\">remaining_budget<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;&lt; 20%&#034;<\/span><br \/>\n      <span class=\"token key atrule\">automation<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token key atrule\">enabled<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token boolean important\">false<\/span><br \/>\n        <span class=\"token key atrule\">allowed_actions<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><br \/>\n        <span class=\"token key atrule\">approval<\/span><span class=\"token punctuation\">:<\/span> manual_approval<\/p>\n<p>  <span class=\"token comment\"># \u9884\u7b97\u8017\u5c3d\u65f6&#xff0c;\u76f4\u63a5\u5207\u6362\u5230\u5f3a\u5236\u4eba\u5de5\u5ba1\u6279<\/span><br \/>\n  <span class=\"token key atrule\">budget_exhausted<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token key atrule\">action<\/span><span class=\"token punctuation\">:<\/span> force_manual<br \/>\n    <span class=\"token key atrule\">approval_flow<\/span><span class=\"token punctuation\">:<\/span> p1_oncall<br \/>\n    <span class=\"token key atrule\">note<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;error budget \u8017\u5c3d\u65f6\u7981\u6b62\u81ea\u52a8\u53d8\u66f4&#xff0c;\u9700\u4eba\u5de5\u5ba1\u6279\u540e\u6267\u884c&#034;<\/span><\/p>\n<p>\u7b56\u7565\u89c4\u5219\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>healthy&#xff1a;\u9884\u7b97\u5145\u8db3&#xff08;\u2265 50%&#xff09;&#xff0c;\u5141\u8bb8\u81ea\u52a8\u91cd\u542f\u3001\u6269\u5bb9\u3001\u56de\u6eda&#xff0c;\u65e0\u9700\u4eba\u5de5\u5ba1\u6279\u3002<\/li>\n<li>degraded&#xff1a;\u9884\u7b97\u90e8\u5206\u6d88\u8017&#xff08;\u2265 20%&#xff09;&#xff0c;\u4ecd\u5141\u8bb8\u81ea\u52a8\u91cd\u542f\/\u6269\u5bb9&#xff0c;\u4f46\u9700\u81ea\u52a8\u521b\u5efa\u53d8\u66f4\u5355\u7559\u75d5\u3002<\/li>\n<li>critical&#xff1a;\u9884\u7b97\u7d27\u5f20&#xff08;&lt; 20%&#xff09;&#xff0c;\u5173\u95ed\u81ea\u52a8\u5316\u53d8\u66f4&#xff0c;\u6240\u6709\u52a8\u4f5c\u8f6c\u4eba\u5de5\u5ba1\u6279\u3002<\/li>\n<li>budget_exhausted&#xff1a;\u9884\u7b97\u8017\u5c3d&#xff0c;\u5f3a\u5236\u8d70 P1 \u503c\u73ed\u4eba\u5de5\u5ba1\u6279\u6d41\u7a0b&#xff0c;\u907f\u514d\u5728\u7cfb\u7edf\u4e0d\u7a33\u5b9a\u65f6\u53e0\u52a0\u81ea\u52a8\u53d8\u66f4\u98ce\u9669\u3002<\/li>\n<\/ul>\n<h3>6. \u5b9e\u6218\u5b9e\u9a8c<\/h3>\n<p>\u5b9a\u4e49\u4e00\u4e2a\u670d\u52a1\u7684 SLO&#xff1a;<\/p>\n<p><span class=\"token key atrule\">service<\/span><span class=\"token punctuation\">:<\/span> payment<span class=\"token punctuation\">&#8211;<\/span>api<br \/>\n<span class=\"token key atrule\">slos<\/span><span class=\"token punctuation\">:<\/span><br \/>\n  <span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> availability<br \/>\n    <span class=\"token key atrule\">target<\/span><span class=\"token punctuation\">:<\/span> 99.95%<br \/>\n    <span class=\"token key atrule\">window<\/span><span class=\"token punctuation\">:<\/span> 30d<br \/>\n  <span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> latency<br \/>\n    <span class=\"token key atrule\">target<\/span><span class=\"token punctuation\">:<\/span> 99.9%<br \/>\n    <span class=\"token key atrule\">threshold_ms<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">500<\/span><br \/>\n    <span class=\"token key atrule\">window<\/span><span class=\"token punctuation\">:<\/span> 30d<\/p>\n<h3>7. \u4ee3\u7801 \/ API \/ \u914d\u7f6e<\/h3>\n<p>Burn rate \u662f\u6bd4&#034;\u5f53\u524d\u9519\u8bef\u7387&#034;\u66f4\u5173\u952e\u7684\u4fe1\u53f7&#xff08;\u5b83\u8861\u91cf\u6d88\u8017\u9884\u7b97\u7684\u901f\u5ea6&#xff09;&#xff1a;<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">burn_rate<\/span><span class=\"token punctuation\">(<\/span>error_ratio<span class=\"token punctuation\">,<\/span> slo_ratio<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token comment\"># error_ratio: \u5b9e\u9645\u9519\u8bef\u6bd4\u4f8b; slo_ratio: \u5141\u8bb8\u7684\u9519\u8bef\u9884\u7b97\u6bd4\u4f8b<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> error_ratio <span class=\"token operator\">\/<\/span> slo_ratio<\/p>\n<p><span class=\"token comment\"># \u4f8b&#xff1a;\u9519\u8bef\u7387 2%&#xff0c;SLO \u5141\u8bb8 0.1%&#xff0c;burn rate &#061; 20 \u500d<\/span><\/p>\n<p>\u5b8c\u6574 Python \u5b9e\u6218\u793a\u4f8b<\/p>\n<p>\u4e0b\u9762\u7ed9\u51fa\u53ef\u76f4\u63a5\u8fd0\u884c\u7684\u793a\u4f8b&#xff0c;\u8986\u76d6 SLO \u914d\u7f6e\u3001\u6ed1\u52a8\u7a97\u53e3 error budget \u8ba1\u7b97\u3001\u591a\u7a97\u53e3 burn rate \u76d1\u63a7\u4e0e\u544a\u8b66\u7ea7\u522b\u8f93\u51fa&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> dataclasses <span class=\"token keyword\">import<\/span> dataclass<span class=\"token punctuation\">,<\/span> field<br \/>\n<span class=\"token keyword\">from<\/span> datetime <span class=\"token keyword\">import<\/span> datetime<span class=\"token punctuation\">,<\/span> timedelta<br \/>\n<span class=\"token keyword\">from<\/span> collections <span class=\"token keyword\">import<\/span> deque<br \/>\n<span class=\"token keyword\">from<\/span> typing <span class=\"token keyword\">import<\/span> Optional<\/p>\n<p><span class=\"token comment\"># &#8212;&#8212;&#8212;- 1. SLO \u914d\u7f6e\u6570\u636e\u7ed3\u6784 &#8212;&#8212;&#8212;-<\/span><br \/>\n<span class=\"token decorator annotation punctuation\">&#064;dataclass<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">SLOConfig<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    service<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">str<\/span><br \/>\n    slo_name<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">str<\/span><br \/>\n    target<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">float<\/span>                         <span class=\"token comment\"># SLO \u76ee\u6807&#xff0c;\u5982 0.999 \u8868\u793a 99.9%<\/span><br \/>\n    window_days<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">30<\/span>                 <span class=\"token comment\"># \u7edf\u8ba1\u7a97\u53e3<\/span><br \/>\n    thresholds<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">dict<\/span> <span class=\"token operator\">&#061;<\/span> field<span class=\"token punctuation\">(<\/span>default_factory<span class=\"token operator\">&#061;<\/span><span class=\"token keyword\">lambda<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token string\">&#034;1h&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">14.4<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;6h&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">6.0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;30d&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">1.0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token decorator annotation punctuation\">&#064;property<\/span><br \/>\n    <span class=\"token keyword\">def<\/span> <span class=\"token function\">error_budget_ratio<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;SLO \u5141\u8bb8\u7684\u9519\u8bef\u6bd4\u4f8b &#061; 1 &#8211; target&#034;&#034;&#034;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span> <span class=\"token operator\">&#8211;<\/span> self<span class=\"token punctuation\">.<\/span>target<\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;dataclass<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Event<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    ts<span class=\"token punctuation\">:<\/span> datetime<br \/>\n    ok<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">bool<\/span><\/p>\n<p><span class=\"token comment\"># &#8212;&#8212;&#8212;- 2. \u6ed1\u52a8\u7a97\u53e3 error budget \u8ba1\u7b97 &#8212;&#8212;&#8212;-<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ErrorBudgetTracker<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">def<\/span> <span class=\"token function\">__init__<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> slo<span class=\"token punctuation\">:<\/span> SLOConfig<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>slo <span class=\"token operator\">&#061;<\/span> slo<br \/>\n        self<span class=\"token punctuation\">.<\/span>events<span class=\"token punctuation\">:<\/span> deque<span class=\"token punctuation\">[<\/span>Event<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> deque<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">record<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> ts<span class=\"token punctuation\">:<\/span> datetime<span class=\"token punctuation\">,<\/span> ok<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">bool<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u8bb0\u5f55\u4e00\u6b21\u8bf7\u6c42\u7ed3\u679c&#034;&#034;&#034;<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>events<span class=\"token punctuation\">.<\/span>append<span class=\"token punctuation\">(<\/span>Event<span class=\"token punctuation\">(<\/span>ts<span class=\"token punctuation\">,<\/span> ok<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">error_ratio<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> window<span class=\"token punctuation\">:<\/span> timedelta<span class=\"token punctuation\">,<\/span> now<span class=\"token punctuation\">:<\/span> datetime<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u8ba1\u7b97\u6ed1\u52a8\u7a97\u53e3\u5185\u7684\u9519\u8bef\u7387&#034;&#034;&#034;<\/span><br \/>\n        cutoff <span class=\"token operator\">&#061;<\/span> now <span class=\"token operator\">&#8211;<\/span> window<br \/>\n        window_events <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span>e <span class=\"token keyword\">for<\/span> e <span class=\"token keyword\">in<\/span> self<span class=\"token punctuation\">.<\/span>events <span class=\"token keyword\">if<\/span> e<span class=\"token punctuation\">.<\/span>ts <span class=\"token operator\">&gt;&#061;<\/span> cutoff<span class=\"token punctuation\">]<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token keyword\">not<\/span> window_events<span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token number\">0.0<\/span><br \/>\n        failed <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">sum<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span> <span class=\"token keyword\">for<\/span> e <span class=\"token keyword\">in<\/span> window_events <span class=\"token keyword\">if<\/span> <span class=\"token keyword\">not<\/span> e<span class=\"token punctuation\">.<\/span>ok<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> failed <span class=\"token operator\">\/<\/span> <span class=\"token builtin\">len<\/span><span class=\"token punctuation\">(<\/span>window_events<span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">remaining_error_budget<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> now<span class=\"token punctuation\">:<\/span> datetime<span class=\"token punctuation\">,<\/span> window_days<span class=\"token punctuation\">:<\/span> Optional<span class=\"token punctuation\">[<\/span><span class=\"token builtin\">int<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">None<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u5269\u4f59 error budget \u6bd4\u4f8b&#xff1b;\u5c0f\u4e8e\u7b49\u4e8e 0 \u8868\u793a\u9884\u7b97\u8017\u5c3d&#034;&#034;&#034;<\/span><br \/>\n        days <span class=\"token operator\">&#061;<\/span> window_days <span class=\"token keyword\">or<\/span> self<span class=\"token punctuation\">.<\/span>slo<span class=\"token punctuation\">.<\/span>window_days<br \/>\n        error_ratio <span class=\"token operator\">&#061;<\/span> self<span class=\"token punctuation\">.<\/span>error_ratio<span class=\"token punctuation\">(<\/span>timedelta<span class=\"token punctuation\">(<\/span>days<span class=\"token operator\">&#061;<\/span>days<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> now<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token builtin\">max<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0.0<\/span><span class=\"token punctuation\">,<\/span> self<span class=\"token punctuation\">.<\/span>slo<span class=\"token punctuation\">.<\/span>error_budget_ratio <span class=\"token operator\">&#8211;<\/span> error_ratio<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># &#8212;&#8212;&#8212;- 3. \u591a\u7a97\u53e3 burn rate \u76d1\u63a7\u4e0e\u544a\u8b66\u7ea7\u522b &#8212;&#8212;&#8212;-<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">burn_rate<\/span><span class=\"token punctuation\">(<\/span>error_ratio<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">,<\/span> slo_ratio<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;burn rate &#061; \u5b9e\u9645\u9519\u8bef\u7387 \/ SLO \u5141\u8bb8\u9519\u8bef\u7387&#034;&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> error_ratio <span class=\"token operator\">\/<\/span> slo_ratio <span class=\"token keyword\">if<\/span> slo_ratio <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;inf&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">get_severity<\/span><span class=\"token punctuation\">(<\/span>window<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">str<\/span><span class=\"token punctuation\">,<\/span> burn_rate_value<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">,<\/span> threshold<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">str<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> burn_rate_value <span class=\"token operator\">&lt;<\/span> threshold<span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#034;OK&#034;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;1h&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;P1\/critical&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;6h&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;P2\/warning&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;30d&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;P3\/info&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">.<\/span>get<span class=\"token punctuation\">(<\/span>window<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;OK&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">multi_window_monitor<\/span><span class=\"token punctuation\">(<\/span>tracker<span class=\"token punctuation\">:<\/span> ErrorBudgetTracker<span class=\"token punctuation\">,<\/span> now<span class=\"token punctuation\">:<\/span> datetime<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">list<\/span><span class=\"token punctuation\">[<\/span><span class=\"token builtin\">dict<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u540c\u65f6\u76d1\u63a7 1h \/ 6h \/ 30d \u4e09\u4e2a\u7a97\u53e3&#034;&#034;&#034;<\/span><br \/>\n    windows <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token string\">&#034;1h&#034;<\/span><span class=\"token punctuation\">:<\/span> timedelta<span class=\"token punctuation\">(<\/span>hours<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;6h&#034;<\/span><span class=\"token punctuation\">:<\/span> timedelta<span class=\"token punctuation\">(<\/span>hours<span class=\"token operator\">&#061;<\/span><span class=\"token number\">6<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;30d&#034;<\/span><span class=\"token punctuation\">:<\/span> timedelta<span class=\"token punctuation\">(<\/span>days<span class=\"token operator\">&#061;<\/span><span class=\"token number\">30<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    results <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> name<span class=\"token punctuation\">,<\/span> window <span class=\"token keyword\">in<\/span> windows<span class=\"token punctuation\">.<\/span>items<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        error_ratio <span class=\"token operator\">&#061;<\/span> tracker<span class=\"token punctuation\">.<\/span>error_ratio<span class=\"token punctuation\">(<\/span>window<span class=\"token punctuation\">,<\/span> now<span class=\"token punctuation\">)<\/span><br \/>\n        br <span class=\"token operator\">&#061;<\/span> burn_rate<span class=\"token punctuation\">(<\/span>error_ratio<span class=\"token punctuation\">,<\/span> tracker<span class=\"token punctuation\">.<\/span>slo<span class=\"token punctuation\">.<\/span>error_budget_ratio<span class=\"token punctuation\">)<\/span><br \/>\n        threshold <span class=\"token operator\">&#061;<\/span> tracker<span class=\"token punctuation\">.<\/span>slo<span class=\"token punctuation\">.<\/span>thresholds<span class=\"token punctuation\">[<\/span>name<span class=\"token punctuation\">]<\/span><br \/>\n        results<span class=\"token punctuation\">.<\/span>append<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token string\">&#034;window&#034;<\/span><span class=\"token punctuation\">:<\/span> name<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#034;error_ratio&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">round<\/span><span class=\"token punctuation\">(<\/span>error_ratio<span class=\"token punctuation\">,<\/span> <span class=\"token number\">6<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#034;burn_rate&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">round<\/span><span class=\"token punctuation\">(<\/span>br<span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#034;threshold&#034;<\/span><span class=\"token punctuation\">:<\/span> threshold<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#034;severity&#034;<\/span><span class=\"token punctuation\">:<\/span> get_severity<span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">,<\/span> br<span class=\"token punctuation\">,<\/span> threshold<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#034;budget_remaining&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">round<\/span><span class=\"token punctuation\">(<\/span>tracker<span class=\"token punctuation\">.<\/span>remaining_error_budget<span class=\"token punctuation\">(<\/span>now<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">6<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> results<\/p>\n<p><span class=\"token keyword\">if<\/span> __name__ <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#034;__main__&#034;<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    slo <span class=\"token operator\">&#061;<\/span> SLOConfig<span class=\"token punctuation\">(<\/span>service<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;payment-api&#034;<\/span><span class=\"token punctuation\">,<\/span> slo_name<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;availability&#034;<\/span><span class=\"token punctuation\">,<\/span> target<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0.999<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    now <span class=\"token operator\">&#061;<\/span> datetime<span class=\"token punctuation\">(<\/span><span class=\"token number\">2026<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">9<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">13<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token comment\"># &#061;&#061;&#061; \u573a\u666f 1&#xff1a;\u6b63\u5e38\u6d41\u91cf&#xff0c;\u6240\u6709\u7a97\u53e3 burn rate \u5747\u4e3a 0 &#061;&#061;&#061;<\/span><br \/>\n    tracker <span class=\"token operator\">&#061;<\/span> ErrorBudgetTracker<span class=\"token punctuation\">(<\/span>slo<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> i <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">range<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">100<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        tracker<span class=\"token punctuation\">.<\/span>record<span class=\"token punctuation\">(<\/span>now <span class=\"token operator\">&#8211;<\/span> timedelta<span class=\"token punctuation\">(<\/span>minutes<span class=\"token operator\">&#061;<\/span>i <span class=\"token operator\">%<\/span> <span class=\"token number\">60<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> ok<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> i <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">range<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        tracker<span class=\"token punctuation\">.<\/span>record<span class=\"token punctuation\">(<\/span>now <span class=\"token operator\">&#8211;<\/span> timedelta<span class=\"token punctuation\">(<\/span>minutes<span class=\"token operator\">&#061;<\/span><span class=\"token number\">60<\/span> <span class=\"token operator\">&#043;<\/span> i <span class=\"token operator\">%<\/span> <span class=\"token number\">300<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> ok<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u573a\u666f 1&#xff1a;\u6b63\u5e38\u6d41\u91cf&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> r <span class=\"token keyword\">in<\/span> multi_window_monitor<span class=\"token punctuation\">(<\/span>tracker<span class=\"token punctuation\">,<\/span> now<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;  window&#061;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>r<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;window&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">, burn_rate&#061;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>r<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;burn_rate&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">, &#034;<\/span><\/span><br \/>\n              <span class=\"token string-interpolation\"><span class=\"token string\">f&#034;threshold&#061;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>r<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;threshold&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">, severity&#061;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>r<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;severity&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token comment\"># \u8f93\u51fa\u793a\u4f8b&#xff1a;<\/span><br \/>\n    <span class=\"token comment\">#   window&#061;1h, burn_rate&#061;0.0, threshold&#061;14.4, severity&#061;OK<\/span><br \/>\n    <span class=\"token comment\">#   window&#061;6h, burn_rate&#061;0.0, threshold&#061;6.0, severity&#061;OK<\/span><br \/>\n    <span class=\"token comment\">#   window&#061;30d, burn_rate&#061;0.0, threshold&#061;1.0, severity&#061;OK<\/span><\/p>\n<p>    <span class=\"token comment\"># &#061;&#061;&#061; \u573a\u666f 2&#xff1a;\u77ed\u671f\u6545\u969c&#xff0c;1h\/6h \u8d85\u8fc7\u9608\u503c&#xff0c;30d \u4ecd\u53ef\u63a7 &#061;&#061;&#061;<\/span><br \/>\n    tracker <span class=\"token operator\">&#061;<\/span> ErrorBudgetTracker<span class=\"token punctuation\">(<\/span>slo<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> i <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">range<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">100<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        tracker<span class=\"token punctuation\">.<\/span>record<span class=\"token punctuation\">(<\/span>now <span class=\"token operator\">&#8211;<\/span> timedelta<span class=\"token punctuation\">(<\/span>minutes<span class=\"token operator\">&#061;<\/span>i <span class=\"token operator\">%<\/span> <span class=\"token number\">60<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> ok<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">%<\/span> <span class=\"token number\">50<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># 1h \u7ea6 2% \u5931\u8d25<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> i <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">range<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        tracker<span class=\"token punctuation\">.<\/span>record<span class=\"token punctuation\">(<\/span>now <span class=\"token operator\">&#8211;<\/span> timedelta<span class=\"token punctuation\">(<\/span>minutes<span class=\"token operator\">&#061;<\/span><span class=\"token number\">60<\/span> <span class=\"token operator\">&#043;<\/span> i <span class=\"token operator\">%<\/span> <span class=\"token number\">300<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> ok<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">%<\/span> <span class=\"token number\">100<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># 6h \u7ea6 1% \u5931\u8d25<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> i <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">range<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">50000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        tracker<span class=\"token punctuation\">.<\/span>record<span class=\"token punctuation\">(<\/span>now <span class=\"token operator\">&#8211;<\/span> timedelta<span class=\"token punctuation\">(<\/span>hours<span class=\"token operator\">&#061;<\/span><span class=\"token number\">10<\/span> <span class=\"token operator\">&#043;<\/span> i <span class=\"token operator\">%<\/span> <span class=\"token number\">700<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> ok<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># 30d \u5386\u53f2\u6210\u529f\u6837\u672c\u7a00\u91ca<\/span><\/p>\n<p>    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u573a\u666f 2&#xff1a;\u77ed\u671f\u6545\u969c&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> r <span class=\"token keyword\">in<\/span> multi_window_monitor<span class=\"token punctuation\">(<\/span>tracker<span class=\"token punctuation\">,<\/span> now<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;  window&#061;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>r<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;window&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">, burn_rate&#061;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>r<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;burn_rate&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">, &#034;<\/span><\/span><br \/>\n              <span class=\"token string-interpolation\"><span class=\"token string\">f&#034;threshold&#061;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>r<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;threshold&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">, severity&#061;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>r<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;severity&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token comment\"># \u8f93\u51fa\u793a\u4f8b&#xff1a;<\/span><br \/>\n    <span class=\"token comment\">#   window&#061;1h, burn_rate\u224820.0, threshold&#061;14.4, severity&#061;P1\/critical<\/span><br \/>\n    <span class=\"token comment\">#   window&#061;6h, burn_rate\u224810.0, threshold&#061;6.0, severity&#061;P2\/warning<\/span><br \/>\n    <span class=\"token comment\">#   window&#061;30d, burn_rate\u22480.2, threshold&#061;1.0, severity&#061;OK<\/span><\/p>\n<p>    <span class=\"token comment\"># &#061;&#061;&#061; \u573a\u666f 3&#xff1a;\u4e25\u91cd\u6545\u969c&#xff0c;\u9884\u7b97\u8017\u5c3d &#061;&#061;&#061;<\/span><br \/>\n    tracker <span class=\"token operator\">&#061;<\/span> ErrorBudgetTracker<span class=\"token punctuation\">(<\/span>slo<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> i <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">range<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">100<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        tracker<span class=\"token punctuation\">.<\/span>record<span class=\"token punctuation\">(<\/span>now <span class=\"token operator\">&#8211;<\/span> timedelta<span class=\"token punctuation\">(<\/span>minutes<span class=\"token operator\">&#061;<\/span>i <span class=\"token operator\">%<\/span> <span class=\"token number\">60<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> ok<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">%<\/span> <span class=\"token number\">10<\/span> <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">7<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># 1h \u7ea6 30% \u5931\u8d25<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> i <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">range<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        tracker<span class=\"token punctuation\">.<\/span>record<span class=\"token punctuation\">(<\/span>now <span class=\"token operator\">&#8211;<\/span> timedelta<span class=\"token punctuation\">(<\/span>minutes<span class=\"token operator\">&#061;<\/span><span class=\"token number\">60<\/span> <span class=\"token operator\">&#043;<\/span> i <span class=\"token operator\">%<\/span> <span class=\"token number\">300<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> ok<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">%<\/span> <span class=\"token number\">10<\/span> <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">8<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># 6h \u7ea6 20% \u5931\u8d25<\/span><\/p>\n<p>    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u573a\u666f 3&#xff1a;\u4e25\u91cd\u6545\u969c&#xff0c;\u9884\u7b97\u8017\u5c3d&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> r <span class=\"token keyword\">in<\/span> multi_window_monitor<span class=\"token punctuation\">(<\/span>tracker<span class=\"token punctuation\">,<\/span> now<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;  window&#061;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>r<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;window&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">, burn_rate&#061;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>r<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;burn_rate&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">, &#034;<\/span><\/span><br \/>\n              <span class=\"token string-interpolation\"><span class=\"token string\">f&#034;threshold&#061;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>r<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;threshold&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">, severity&#061;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>r<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;severity&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">, &#034;<\/span><\/span><br \/>\n              <span class=\"token string-interpolation\"><span class=\"token string\">f&#034;budget_remaining&#061;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>r<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;budget_remaining&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token comment\"># \u8f93\u51fa\u793a\u4f8b&#xff1a;<\/span><br \/>\n    <span class=\"token comment\">#   window&#061;1h, burn_rate\u2248300.0, threshold&#061;14.4, severity&#061;P1\/critical, budget_remaining\u22480.0<\/span><br \/>\n    <span class=\"token comment\">#   window&#061;6h, burn_rate\u2248200.0, threshold&#061;6.0, severity&#061;P2\/warning, budget_remaining\u22480.0<\/span><br \/>\n    <span class=\"token comment\">#   window&#061;30d, burn_rate\u2248209.0, threshold&#061;1.0, severity&#061;P3\/info, budget_remaining&#061;0.0<\/span><\/p>\n<p>\u8fb9\u754c\u6761\u4ef6\u4e0e\u6ce8\u610f\u4e8b\u9879<\/p>\n<p>\u5728\u5b9e\u9645\u843d\u5730\u65f6&#xff0c;\u4e0a\u8ff0\u793a\u4f8b\u7684\u7b80\u5316\u903b\u8f91\u4f1a\u9047\u5230\u51e0\u4e2a\u8fb9\u754c\u6761\u4ef6&#xff0c;\u9700\u8981\u663e\u5f0f\u5904\u7406&#xff0c;\u5426\u5219\u4f1a\u4ea7\u751f\u8bef\u62a5\u6216\u6f0f\u62a5&#xff1a;<\/p>\n<p>1. \u7a97\u53e3\u5185\u6837\u672c\u91cf\u4e0d\u8db3\u65f6 error_ratio \u7684\u8ba1\u7b97\u504f\u5dee<\/p>\n<p>\u5f53\u7a97\u53e3\u5185\u6837\u672c\u91cf\u5f88\u5c11\u65f6&#xff0c;error_ratio \u7684\u7edf\u8ba1\u610f\u4e49\u4f1a\u663e\u8457\u4e0b\u964d\u3002\u4f8b\u5982 1h \u7a97\u53e3\u5185\u53ea\u6709 10 \u4e2a\u8bf7\u6c42&#xff0c;\u5176\u4e2d 1 \u4e2a\u5931\u8d25&#xff0c;error_ratio &#061; 10%&#xff0c;burn rate \u9ad8\u8fbe 100 \u500d&#xff0c;\u4f46\u8fd9\u5f88\u53ef\u80fd\u53ea\u662f\u566a\u58f0\u800c\u975e\u771f\u5b9e\u6545\u969c\u3002<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">error_ratio<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> window<span class=\"token punctuation\">:<\/span> timedelta<span class=\"token punctuation\">,<\/span> now<span class=\"token punctuation\">:<\/span> datetime<span class=\"token punctuation\">,<\/span> min_samples<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u8ba1\u7b97\u6ed1\u52a8\u7a97\u53e3\u5185\u7684\u9519\u8bef\u7387&#xff1b;\u6837\u672c\u4e0d\u8db3\u65f6\u8fd4\u56de None \u8868\u793a\u4e0d\u53ef\u4fe1&#034;&#034;&#034;<\/span><br \/>\n    cutoff <span class=\"token operator\">&#061;<\/span> now <span class=\"token operator\">&#8211;<\/span> window<br \/>\n    window_events <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span>e <span class=\"token keyword\">for<\/span> e <span class=\"token keyword\">in<\/span> self<span class=\"token punctuation\">.<\/span>events <span class=\"token keyword\">if<\/span> e<span class=\"token punctuation\">.<\/span>ts <span class=\"token operator\">&gt;&#061;<\/span> cutoff<span class=\"token punctuation\">]<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token builtin\">len<\/span><span class=\"token punctuation\">(<\/span>window_events<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;<\/span> min_samples<span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">None<\/span>  <span class=\"token comment\"># \u6837\u672c\u4e0d\u8db3&#xff0c;\u4e0d\u53c2\u4e0e burn rate \u5224\u5b9a<\/span><br \/>\n    failed <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">sum<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span> <span class=\"token keyword\">for<\/span> e <span class=\"token keyword\">in<\/span> window_events <span class=\"token keyword\">if<\/span> <span class=\"token keyword\">not<\/span> e<span class=\"token punctuation\">.<\/span>ok<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> failed <span class=\"token operator\">\/<\/span> <span class=\"token builtin\">len<\/span><span class=\"token punctuation\">(<\/span>window_events<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u5904\u7406\u5efa\u8bae&#xff1a;\u4e3a\u6bcf\u4e2a\u7a97\u53e3\u8bbe\u7f6e\u6700\u5c0f\u6837\u672c\u91cf\u9608\u503c&#xff08;\u5982 1h \u7a97\u53e3\u81f3\u5c11 100 \u4e2a\u6837\u672c&#xff09;&#xff0c;\u6837\u672c\u4e0d\u8db3\u65f6\u8df3\u8fc7\u8be5\u7a97\u53e3\u7684 burn rate \u5224\u5b9a&#xff0c;\u6216\u964d\u7ea7\u4e3a observe \u800c\u975e\u76f4\u63a5\u544a\u8b66\u3002<\/p>\n<p>2. \u591a\u4e2a SLO \u540c\u65f6\u88ab\u51fb\u7a7f\u65f6\u544a\u8b66\u4f18\u5148\u7ea7\u5982\u4f55\u5408\u5e76<\/p>\n<p>\u4e00\u4e2a\u670d\u52a1\u901a\u5e38\u540c\u65f6\u7ef4\u62a4\u591a\u4e2a SLO&#xff08;availability\u3001latency\u3001correctness \u7b49&#xff09;\u3002\u5f53\u591a\u4e2a SLO \u540c\u65f6\u88ab\u51fb\u7a7f\u65f6&#xff0c;\u4e0d\u80fd\u7b80\u5355\u53d6\u6700\u9ad8\u7ea7\u522b&#xff0c;\u800c\u5e94\u5408\u5e76\u4e3a\u4e00\u4e2a\u805a\u5408\u544a\u8b66&#xff0c;\u907f\u514d\u544a\u8b66\u98ce\u66b4&#xff1a;<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">merge_slo_alerts<\/span><span class=\"token punctuation\">(<\/span>alerts<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">list<\/span><span class=\"token punctuation\">[<\/span><span class=\"token builtin\">dict<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">dict<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u5408\u5e76\u540c\u4e00\u670d\u52a1\u7684\u591a\u4e2a SLO \u544a\u8b66&#xff0c;\u53d6\u6700\u9ad8\u4f18\u5148\u7ea7\u5e76\u805a\u5408\u4e0a\u4e0b\u6587&#034;&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token keyword\">not<\/span> alerts<span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    severity_rank <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;P1&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;P2&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;P3&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    top <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">max<\/span><span class=\"token punctuation\">(<\/span>alerts<span class=\"token punctuation\">,<\/span> key<span class=\"token operator\">&#061;<\/span><span class=\"token keyword\">lambda<\/span> a<span class=\"token punctuation\">:<\/span> severity_rank<span class=\"token punctuation\">.<\/span>get<span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;severity&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token string\">&#034;service&#034;<\/span><span class=\"token punctuation\">:<\/span> top<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;service&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;severity&#034;<\/span><span class=\"token punctuation\">:<\/span> top<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;severity&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;slo_hits&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span>a<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;slo_name&#034;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token keyword\">for<\/span> a <span class=\"token keyword\">in<\/span> alerts<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;max_burn_rate&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">max<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;burn_rate&#034;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token keyword\">for<\/span> a <span class=\"token keyword\">in<\/span> alerts<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;windows&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">sorted<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span>a<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;window&#034;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token keyword\">for<\/span> a <span class=\"token keyword\">in<\/span> alerts<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;action&#034;<\/span><span class=\"token punctuation\">:<\/span> top<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;action&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5904\u7406\u5efa\u8bae&#xff1a;\u6309\u300c\u6700\u9ad8\u4e25\u91cd\u7ea7\u522b &#043; \u547d\u4e2d\u7684 SLO \u5217\u8868 &#043; \u6700\u5927 burn rate\u300d\u5408\u5e76\u4e3a\u4e00\u6761\u544a\u8b66&#xff1b;\u82e5\u591a\u4e2a SLO \u6307\u5411\u540c\u4e00\u6839\u56e0&#xff08;\u5982\u4e0a\u6e38\u4f9d\u8d56\u8d85\u65f6\u540c\u65f6\u51fb\u7a7f availability \u4e0e latency&#xff09;&#xff0c;\u5e94\u5408\u5e76\u4e3a\u4e00\u6b21\u6392\u67e5&#xff0c;\u800c\u975e\u91cd\u590d\u89e6\u53d1\u3002<\/p>\n<p>3. burn_rate \u4e3a\u65e0\u7a77\u5927&#xff08;slo_ratio&#061;0&#xff09;\u65f6\u7684\u5904\u7406<\/p>\n<p>\u5f53 SLO \u76ee\u6807\u4e3a 100%&#xff08;slo_ratio &#061; 0&#xff09;\u65f6&#xff0c;burn_rate \u4f1a\u9664\u4ee5 0 \u5f97\u5230\u65e0\u7a77\u5927\u3002\u6b64\u65f6\u4efb\u4f55\u4e00\u6b21\u5931\u8d25\u90fd\u610f\u5473\u7740\u300c\u9884\u7b97\u77ac\u95f4\u8017\u5c3d\u300d&#xff0c;\u9700\u8981\u7279\u6b8a\u5904\u7406&#xff1a;<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">burn_rate<\/span><span class=\"token punctuation\">(<\/span>error_ratio<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">,<\/span> slo_ratio<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;burn rate &#061; \u5b9e\u9645\u9519\u8bef\u7387 \/ SLO \u5141\u8bb8\u9519\u8bef\u7387&#xff1b;slo_ratio&#061;0 \u65f6\u8fd4\u56de inf&#034;&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> slo_ratio <span class=\"token operator\">&lt;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;inf&#034;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">if<\/span> error_ratio <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token number\">0.0<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> error_ratio <span class=\"token operator\">\/<\/span> slo_ratio<\/p>\n<p>\u5904\u7406\u5efa\u8bae&#xff1a;slo_ratio &#061; 0 \u610f\u5473\u7740\u300c\u96f6\u5bb9\u5fcd\u300d\u7b56\u7565&#xff0c;\u4efb\u4f55\u5931\u8d25\u90fd\u5e94\u76f4\u63a5\u89e6\u53d1\u6700\u9ad8\u7ea7\u522b\u544a\u8b66\u5e76\u5347\u7ea7\u4eba\u5de5&#xff0c;\u4e0d\u5e94\u8fdb\u5165\u5e38\u89c4\u7684 burn rate \u9608\u503c\u6bd4\u8f83\u903b\u8f91\u3002\u540c\u65f6\u5e94\u5728 SLO \u5b9a\u4e49\u9636\u6bb5\u5c31\u907f\u514d target &#061; 1.0 \u7684\u5199\u6cd5&#xff0c;\u6539\u4e3a target &#061; 0.9999 \u7b49\u53ef\u5ea6\u91cf\u7684\u76ee\u6807\u3002<\/p>\n<p>4. \u6ed1\u52a8\u7a97\u53e3\u4e0e\u56fa\u5b9a\u7a97\u53e3\u5728 error budget \u8ba1\u7b97\u4e0a\u7684\u5dee\u5f02<\/p>\n<p>\u6ed1\u52a8\u7a97\u53e3&#xff08;rolling window&#xff09;\u4e0e\u56fa\u5b9a\u7a97\u53e3&#xff08;calendar window&#xff09;\u5728 error budget \u8ba1\u7b97\u4e0a\u6709\u672c\u8d28\u5dee\u5f02&#xff1a;<\/p>\n<table>\n<tr>\u7ef4\u5ea6\u6ed1\u52a8\u7a97\u53e3\u56fa\u5b9a\u7a97\u53e3<\/tr>\n<tbody>\n<tr>\n<td>\u7a97\u53e3\u8fb9\u754c<\/td>\n<td>\u968f\u5f53\u524d\u65f6\u95f4\u6eda\u52a8&#xff0c;\u5982\u300c\u6700\u8fd1 30 \u5929\u300d<\/td>\n<td>\u6309\u65e5\u5386\u5bf9\u9f50&#xff0c;\u5982\u300c\u672c\u6708 1 \u65e5 0 \u70b9\u81f3\u6708\u672b\u300d<\/td>\n<\/tr>\n<tr>\n<td>\u9884\u7b97\u91cd\u7f6e<\/td>\n<td>\u6c38\u4e0d\u91cd\u7f6e&#xff0c;\u65e7\u6570\u636e\u6301\u7eed\u6ed1\u51fa<\/td>\n<td>\u6bcf\u4e2a\u5468\u671f&#xff08;\u6708\/\u5468&#xff09;\u91cd\u7f6e<\/td>\n<\/tr>\n<tr>\n<td>\u5bf9\u7a81\u53d1\u6545\u969c\u7684\u654f\u611f\u5ea6<\/td>\n<td>\u9ad8&#xff0c;\u6545\u969c\u4f1a\u7acb\u5373\u53cd\u6620\u5728\u7a97\u53e3\u5185<\/td>\n<td>\u4f4e&#xff0c;\u6708\u521d\u7684\u6545\u969c\u4f1a\u88ab\u6574\u6708\u6570\u636e\u7a00\u91ca<\/td>\n<\/tr>\n<tr>\n<td>\u9002\u5408\u573a\u666f<\/td>\n<td>\u5b9e\u65f6\u76d1\u63a7\u3001burn rate \u544a\u8b66<\/td>\n<td>\u6708\u5ea6\/\u5b63\u5ea6\u590d\u76d8\u3001\u5bb9\u91cf\u89c4\u5212<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">remaining_error_budget_fixed_window<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    slo<span class=\"token punctuation\">:<\/span> SLOConfig<span class=\"token punctuation\">,<\/span> month_start<span class=\"token punctuation\">:<\/span> datetime<span class=\"token punctuation\">,<\/span> now<span class=\"token punctuation\">:<\/span> datetime<br \/>\n<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u56fa\u5b9a\u7a97\u53e3&#xff08;\u81ea\u7136\u6708&#xff09;error budget \u5269\u4f59\u91cf\u8ba1\u7b97&#034;&#034;&#034;<\/span><br \/>\n    elapsed_ratio <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span>now <span class=\"token operator\">&#8211;<\/span> month_start<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>total_seconds<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">\/<\/span> <span class=\"token punctuation\">(<\/span><br \/>\n        <span class=\"token punctuation\">(<\/span>month_start<span class=\"token punctuation\">.<\/span>replace<span class=\"token punctuation\">(<\/span>month<span class=\"token operator\">&#061;<\/span>month_start<span class=\"token punctuation\">.<\/span>month <span class=\"token operator\">%<\/span> <span class=\"token number\">12<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> day<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span> month_start<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>total_seconds<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token comment\"># \u5df2\u6d88\u8017\u7684\u9884\u7b97 &#061; \u5df2\u6d41\u901d\u65f6\u95f4\u6bd4\u4f8b \u00d7 \u603b\u9884\u7b97<\/span><br \/>\n    consumed_budget <span class=\"token operator\">&#061;<\/span> slo<span class=\"token punctuation\">.<\/span>error_budget_ratio <span class=\"token operator\">*<\/span> elapsed_ratio<br \/>\n    <span class=\"token comment\"># \u5b9e\u9645\u9519\u8bef\u7387<\/span><br \/>\n    error_ratio <span class=\"token operator\">&#061;<\/span> compute_error_ratio<span class=\"token punctuation\">(<\/span>month_start<span class=\"token punctuation\">,<\/span> now<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token builtin\">max<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0.0<\/span><span class=\"token punctuation\">,<\/span> consumed_budget <span class=\"token operator\">&#8211;<\/span> error_ratio<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u5904\u7406\u5efa\u8bae&#xff1a;\u751f\u4ea7\u73af\u5883\u5e94\u540c\u65f6\u7ef4\u62a4\u4e24\u79cd\u53e3\u5f84\u2014\u2014\u6ed1\u52a8\u7a97\u53e3\u7528\u4e8e\u5b9e\u65f6 burn rate \u544a\u8b66&#xff08;\u5feb\u901f\u53d1\u73b0&#xff09;&#xff0c;\u56fa\u5b9a\u7a97\u53e3\u7528\u4e8e\u5468\u671f\u6027\u590d\u76d8\u4e0e\u5bb9\u91cf\u89c4\u5212&#xff08;\u5b8f\u89c2\u89c6\u89d2&#xff09;\u3002\u4e24\u8005\u7ed3\u8bba\u4e0d\u4e00\u81f4\u65f6&#xff08;\u5982\u6ed1\u52a8\u7a97\u53e3\u5df2\u544a\u8b66\u4f46\u56fa\u5b9a\u7a97\u53e3\u4ecd\u5065\u5eb7&#xff09;&#xff0c;\u4ee5\u6ed1\u52a8\u7a97\u53e3\u4e3a\u51c6\u89e6\u53d1\u54cd\u5e94&#xff0c;\u56fa\u5b9a\u7a97\u53e3\u4ec5\u4f5c\u8d8b\u52bf\u53c2\u8003\u3002<\/p>\n<p>\u5f53 burn rate \u8d85\u8fc7\u9608\u503c\u65f6\u7684\u6392\u67e5\u51b3\u7b56\u6d41\u7a0b burn rate \u9608\u503c\u4e0e\u65f6\u95f4\u7a97\u53e3\u5bf9\u7167\u8868<\/p>\n<p>\u4ee5\u5141\u8bb8\u9519\u8bef\u7387\u4e3a 0.1%&#xff08;SLO 99.9%&#xff0c;\u7a97\u53e3 30d&#xff09;\u7684\u670d\u52a1\u4e3a\u4f8b&#xff0c;\u53ef\u6309\u300c\u9884\u7b97\u6d88\u8017\u901f\u5ea6\u300d\u8bbe\u7f6e\u591a\u6863\u9608\u503c&#xff1a;<\/p>\n<table>\n<tr>\u65f6\u95f4\u7a97\u53e3burn rate \u9608\u503c\u6301\u7eed\u8be5\u901f\u7387\u4e0b\u6d88\u8017\u5b8c 30 \u5929\u9884\u7b97\u7684\u65f6\u95f4\u5efa\u8bae\u544a\u8b66\u7ea7\u522b\u7b80\u8981\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>1h<\/td>\n<td>14.4<\/td>\n<td>\u7ea6 2.08 \u5929&#xff08;1 \u5c0f\u65f6\u6d88\u8017\u7ea6 2% \u9884\u7b97&#xff09;<\/td>\n<td>P1 \/ critical<\/td>\n<td>\u6545\u969c\u6b63\u5728\u5feb\u901f\u6d88\u8017\u9884\u7b97&#xff0c;\u9700\u7acb\u5373\u54cd\u5e94\u5e76\u62c9\u901a\u6392\u67e5<\/td>\n<\/tr>\n<tr>\n<td>6h<\/td>\n<td>6<\/td>\n<td>\u7ea6 5 \u5929&#xff08;6 \u5c0f\u65f6\u6d88\u8017\u7ea6 5% \u9884\u7b97&#xff09;<\/td>\n<td>P2 \/ warning<\/td>\n<td>\u6301\u7eed\u9519\u8bef\u6b63\u5728\u7d2f\u79ef\u9884\u7b97&#xff0c;\u5e94\u8fdb\u5165\u6392\u67e5\u6d41\u7a0b<\/td>\n<\/tr>\n<tr>\n<td>30d<\/td>\n<td>1<\/td>\n<td>\u7ea6 30 \u5929<\/td>\n<td>P3 \/ info<\/td>\n<td>\u6574\u7a97\u9884\u7b97\u521a\u597d\u6309\u8ba1\u5212\u6d88\u8017&#xff0c;\u7528\u4e8e\u8d8b\u52bf\u89c2\u5bdf\u4e0e\u590d\u76d8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u8bf4\u660e&#xff1a;\u540c\u4e00\u65f6\u523b\u53ef\u4ee5\u540c\u65f6\u7ef4\u62a4\u591a\u4e2a\u7a97\u53e3\u7684 burn rate \u544a\u8b66\u3002\u77ed\u671f\u7a97\u53e3&#xff08;1h&#xff09;\u8d1f\u8d23\u300c\u5feb\u901f\u53d1\u73b0\u300d&#xff0c;\u957f\u671f\u7a97\u53e3&#xff08;30d&#xff09;\u8d1f\u8d23\u300c\u6162\u6cc4\u6f0f\u300d\u53d1\u73b0&#xff1b;\u5f53 1h \u4e0e 6h \u540c\u65f6\u8d85\u9608\u503c\u65f6&#xff0c;\u901a\u5e38\u610f\u5473\u7740\u6545\u969c\u4ecd\u5728\u6301\u7eed&#xff0c;\u544a\u8b66\u4f18\u5148\u7ea7\u5e94\u76f8\u5e94\u4e0a\u8c03\u3002<\/p>\n<p>\u5f53 SLO Agent \u68c0\u6d4b\u5230\u67d0\u4e2a SLI \u7684 burn rate \u8d85\u8fc7\u9884\u8bbe\u9608\u503c&#xff08;\u4f8b\u5982\u77ed\u671f\u7a97\u53e3 burn rate &gt; 14.4 \u500d\u65f6&#xff0c;\u610f\u5473\u7740 2 \u5c0f\u65f6\u5185\u6d88\u8017\u5b8c 30 \u5929\u9519\u8bef\u9884\u7b97&#xff09;&#xff0c;\u5e94\u89e6\u53d1\u4ee5\u4e0b\u51b3\u7b56\u94fe\u8def&#xff1a;<\/p>\n<li>\n<p>SLO Agent \u68c0\u6d4b\u9ad8 burn rate<\/p>\n<ul>\n<li>\u8f93\u5165&#xff1a;\u5b9e\u65f6 SLI \u6307\u6807&#xff08;\u5982 availability \u5f53\u524d\u4f4e\u4e8e SLO\u3001latency P99 \u8d85\u6807\u4e8b\u4ef6\u6d41&#xff09;<\/li>\n<li>\u8f93\u51fa&#xff1a;\u4e00\u4e2a\u544a\u8b66\u4e8b\u4ef6&#xff0c;\u5305\u542b service\u3001slo_name\u3001burn_rate\u3001time_window\u3001severity \u793a\u4f8b&#xff1a;<\/li>\n<\/ul>\n<p> alert: payment-api \/ availability \/ burn_rate&#061;20.0 \/ window&#061;1h \/ severity&#061;critical\n <\/li>\n<li>\n<p>\u5173\u8054 SLI \u6307\u6807\u4e0e\u7ef4\u5ea6<\/p>\n<ul>\n<li>\u8f93\u5165&#xff1a;\u544a\u8b66\u4e8b\u4ef6\u4e2d\u7684 service \u6807\u7b7e\u4e0e SLO \u5b9a\u4e49<\/li>\n<li>\u8f93\u51fa&#xff1a;\u547d\u4e2d\u8be5 SLO \u7684\u5168\u90e8 SLI \u6307\u6807\u96c6\u5408\u53ca\u5176\u5f53\u524d\u503c \u793a\u4f8b&#xff1a;<\/li>\n<\/ul>\n<p> service&#061;payment-api<br \/>\navailability&#061;99.2%&#xff08;\u4f4e\u4e8e 99.95%&#xff09;<br \/>\nlatency_p99&#061;780ms&#xff08;\u8d85\u8fc7 500ms&#xff09;<br \/>\nerror_rate&#061;2.0%\n <\/li>\n<li>\n<p>\u5b9a\u4f4d\u5f02\u5e38\u670d\u52a1\u4e0e\u8d21\u732e\u8d44\u6e90<\/p>\n<ul>\n<li>\u8f93\u5165&#xff1a;\u5173\u8054\u540e\u7684 SLI \u6307\u6807&#xff0c;\u7ed3\u5408\u8fd0\u884c\u65f6\u62d3\u6251\u548c span\/trace \u6570\u636e<\/li>\n<li>\u8f93\u51fa&#xff1a;\u7591\u4f3c\u5f02\u5e38\u7684\u670d\u52a1\u5b9e\u4f8b\u3001\u4f9d\u8d56\u6216\u57fa\u7840\u8bbe\u65bd\u7ec4\u4ef6 \u793a\u4f8b&#xff1a;<\/li>\n<\/ul>\n<p> suspect_service&#061;payment-api-pod-7f8c9<br \/>\nroot_cause_hint&#061;upstream dependency: inventory-service timeout\n <\/li>\n<li>\n<p>\u5224\u65ad\u89e6\u53d1\u81ea\u52a8\u4fee\u590d\u6216\u5347\u7ea7\u4eba\u5de5<\/p>\n<ul>\n<li>\u8f93\u5165&#xff1a;error budget \u5269\u4f59\u91cf\u3001burn rate \u7b49\u7ea7\u3001\u4e8b\u4ef6\u53ef\u4fe1\u5ea6\u3001\u81ea\u52a8\u5316\u7b56\u7565<\/li>\n<li>\u8f93\u51fa&#xff1a;\u52a8\u4f5c\u51b3\u7b56&#xff08;\u81ea\u52a8\u4fee\u590d \/ \u4eba\u5de5\u5347\u7ea7 \/ \u7ee7\u7eed\u89c2\u5bdf&#xff09; \u793a\u4f8b&#xff1a;<\/li>\n<\/ul>\n<p> error_budget_remaining&#061;0.03%&#xff08;\u5373\u5c06\u8017\u5c3d&#xff09;<br \/>\nburn_rate_level&#061;critical<br \/>\nconfidence&#061;high<br \/>\naction&#061;escalate_to_human&#xff08;P1&#xff09;\n <\/li>\n<p>\u4e0b\u9762\u662f\u4e0a\u8ff0 4 \u6b65\u51b3\u7b56\u94fe\u8def\u7684\u5b8c\u6574\u6d41\u7a0b\u56fe&#xff1a;<\/p>\n<p>  #mermaid-svg-yqE4rw5SmzxSee9V{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-yqE4rw5SmzxSee9V .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear 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0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-yqE4rw5SmzxSee9V .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-yqE4rw5SmzxSee9V .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-yqE4rw5SmzxSee9V .cluster text{fill:#333;}#mermaid-svg-yqE4rw5SmzxSee9V .cluster span{color:#333;}#mermaid-svg-yqE4rw5SmzxSee9V div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-yqE4rw5SmzxSee9V .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-yqE4rw5SmzxSee9V rect.text{fill:none;stroke-width:0;}#mermaid-svg-yqE4rw5SmzxSee9V .icon-shape,#mermaid-svg-yqE4rw5SmzxSee9V .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-yqE4rw5SmzxSee9V .icon-shape p,#mermaid-svg-yqE4rw5SmzxSee9V .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-yqE4rw5SmzxSee9V .icon-shape .label rect,#mermaid-svg-yqE4rw5SmzxSee9V .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-yqE4rw5SmzxSee9V .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-yqE4rw5SmzxSee9V .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-yqE4rw5SmzxSee9V :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>\u5426<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>\u662f<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>\u5269\u4f59 &gt;&#061; 20%&#xff08;\u9884\u7b97\u5145\u8db3&#xff09;<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>\u9ad8&#xff08;&gt;&#061; HIGH_TRUST&#xff09;<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>\u4f4e<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>\u5269\u4f59 &lt; 20%&#xff08;\u9884\u7b97\u7d27\u5f20&#xff09;<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>critical<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>warning<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>\u5269\u4f59 &lt;&#061; 0&#xff08;\u9884\u7b97\u8017\u5c3d&#xff09;<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>SLO Agent \u68c0\u6d4b\u9ad8 burn rate<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>burn_rate &gt;&#061; \u9608\u503c?<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u7ee7\u7eed\u89c2\u5bdf observe<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u5173\u8054 SLI \u6307\u6807\u4e0e\u7ef4\u5ea6<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u5b9a\u4f4d\u5f02\u5e38\u670d\u52a1\u4e0e\u8d21\u732e\u8d44\u6e90<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>error budget \u5269\u4f59\u91cf?<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u7f6e\u4fe1\u5ea6 confidence?<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u81ea\u52a8\u4fee\u590d auto_remediate<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u7ee7\u7eed\u89c2\u5bdf observe<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>burn rate \u7b49\u7ea7?<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u5347\u7ea7\u4eba\u5de5 escalate_to_human&#xff08;P1&#xff09;<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u81ea\u52a8\u521b\u5efa\u53d8\u66f4\u5355 &#043; \u4eba\u5de5\u5ba1\u6279<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u5f3a\u5236\u4eba\u5de5\u5ba1\u6279 force_manual&#xff08;P1 \u503c\u73ed&#xff09;<\/p>\n<p><\/span><\/p>\n<p>\u4f2a\u4ee3\u7801\u63cf\u8ff0\u5b8c\u6574\u94fe\u8def&#xff1a;<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">troubleshoot_high_burn_rate<\/span><span class=\"token punctuation\">(<\/span>alert<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token comment\"># Step 1: SLO Agent \u8f93\u51fa\u9ad8 burn rate \u544a\u8b66<\/span><br \/>\n    service <span class=\"token operator\">&#061;<\/span> alert<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;service&#034;<\/span><span class=\"token punctuation\">]<\/span><br \/>\n    slo_name <span class=\"token operator\">&#061;<\/span> alert<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;slo_name&#034;<\/span><span class=\"token punctuation\">]<\/span><br \/>\n    burn_rate <span class=\"token operator\">&#061;<\/span> alert<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;burn_rate&#034;<\/span><span class=\"token punctuation\">]<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> burn_rate <span class=\"token operator\">&lt;<\/span> BURN_RATE_THRESHOLD<span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;action&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;observe&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;reason&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;burn rate below threshold&#034;<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\"># Step 2: \u5173\u8054 SLI \u6307\u6807<\/span><br \/>\n    sli_metrics <span class=\"token operator\">&#061;<\/span> get_sli_metrics<span class=\"token punctuation\">(<\/span>service<span class=\"token punctuation\">,<\/span> slo_name<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token comment\"># \u8fd4\u56de\u5982&#xff1a;{&#034;availability&#034;: 0.992, &#034;latency_p99_ms&#034;: 780, &#034;error_rate&#034;: 0.02}<\/span><\/p>\n<p>    <span class=\"token comment\"># Step 3: \u5b9a\u4f4d\u5f02\u5e38\u670d\u52a1<\/span><br \/>\n    topology <span class=\"token operator\">&#061;<\/span> get_service_topology<span class=\"token punctuation\">(<\/span>service<span class=\"token punctuation\">)<\/span><br \/>\n    suspects <span class=\"token operator\">&#061;<\/span> locate_anomaly<span class=\"token punctuation\">(<\/span>topology<span class=\"token punctuation\">,<\/span> sli_metrics<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token comment\"># \u8fd4\u56de\u5982&#xff1a;[&#034;payment-api-pod-7f8c9&#034;]&#xff0c;\u53ef\u80fd\u901a\u8fc7 trace\/\u65e5\u5fd7\u5173\u8054<\/span><\/p>\n<p>    <span class=\"token comment\"># Step 4: \u8bc4\u4f30\u9884\u7b97\u548c\u7f6e\u4fe1\u5ea6&#xff0c;\u51b3\u5b9a\u52a8\u4f5c<\/span><br \/>\n    error_budget <span class=\"token operator\">&#061;<\/span> get_error_budget<span class=\"token punctuation\">(<\/span>service<span class=\"token punctuation\">,<\/span> slo_name<span class=\"token punctuation\">,<\/span> window<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;30d&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    confidence <span class=\"token operator\">&#061;<\/span> calc_confidence<span class=\"token punctuation\">(<\/span>sli_metrics<span class=\"token punctuation\">,<\/span> suspects<span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> error_budget<span class=\"token punctuation\">.<\/span>burned <span class=\"token operator\">&gt;<\/span> BUDGET_CRITICAL_RATIO <span class=\"token keyword\">and<\/span> confidence <span class=\"token operator\">&gt;&#061;<\/span> HIGH_TRUST<span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;action&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;auto_remediate&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;targets&#034;<\/span><span class=\"token punctuation\">:<\/span> suspects<span class=\"token punctuation\">,<\/span><br \/>\n                <span class=\"token string\">&#034;allowed_actions&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;restart_pod&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;scale_out&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">elif<\/span> error_budget<span class=\"token punctuation\">.<\/span>remaining <span class=\"token operator\">&lt;<\/span> BUDGET_EXHAUSTED_THRESHOLD<span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;action&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;escalate_to_human&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;priority&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;P1&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                <span class=\"token string\">&#034;reason&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;error budget nearly exhausted, manual control required&#034;<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">else<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;action&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;observe&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;reason&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;collect more evidence&#034;<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<h3>8. \u751f\u4ea7\u73af\u5883\u6700\u4f73\u5b9e\u8df5<\/h3>\n<p>\u4e0d\u8981\u8ba9 CPU \u76f4\u63a5\u51b3\u5b9a&#034;\u81ea\u52a8\u4fee\u590d&#034;\u3002\u5e94\u7ec4\u5408\u591a\u4e2a\u4fe1\u53f7&#xff1a;<\/p>\n<p>CPU 95% &#043; request error rate \u2191 &#043; latency \u2191 &#043; SLO burn rate \u2191 &#061; \u9ad8\u53ef\u4fe1\u4e8b\u4ef6<\/p>\n<h3>9. \u5e38\u89c1\u9519\u8bef<\/h3>\n<ul>\n<li>\u7528\u8d44\u6e90\u6307\u6807&#xff08;CPU\/\u5185\u5b58&#xff09;\u4ee3\u66ff SLI \u6765\u5b9a\u4e49\u5065\u5eb7\u3002<\/li>\n<li>\u53ea\u8bbe SLO \u4e0d\u8ba1\u7b97 burn rate&#xff0c;\u65e0\u6cd5\u611f\u77e5&#034;\u9884\u7b97\u6d88\u8017\u901f\u5ea6&#034;\u3002<\/li>\n<li>\u628a error budget \u5f53\u6446\u8bbe&#xff0c;\u81ea\u52a8\u5316\u7b56\u7565\u4e0e\u5176\u8131\u94a9\u3002<\/li>\n<\/ul>\n<h3>10. \u5b89\u5168\u6ce8\u610f\u4e8b\u9879<\/h3>\n<p>Error budget \u4e5f\u662f&#034;\u81ea\u52a8\u5316\u98ce\u9669\u9884\u7b97&#034;&#xff1a;\u9884\u7b97\u8017\u5c3d\u65f6&#xff0c;\u5e94\u6536\u7d27\u81ea\u52a8\u5316\u6743\u9650&#xff0c;\u56de\u9000\u5230\u4eba\u5de5&#xff0c;\u907f\u514d\u5728\u7cfb\u7edf\u4e0d\u7a33\u5b9a\u65f6\u53e0\u52a0\u66f4\u591a\u53d8\u66f4\u98ce\u9669\u3002<\/p>\n<h3>11. \u53ef\u89c2\u6d4b\u6027<\/h3>\n<p>\u4e3a\u6bcf\u4e2a SLI \u66b4\u9732\u5b9e\u65f6\u91c7\u96c6\u4e0e burn rate \u6307\u6807&#xff0c;\u5e76\u6253\u4e0a service\/environment \u6807\u7b7e&#xff0c;\u4f9b SLO Agent \u6d88\u8d39\u3002<\/p>\n<h3>12. 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