1.1 \u7b97\u672f\u8fd0\u7b97\u7b26\u7c7b\u578b<\/h3>\n\n- Ansible\u6a21\u677f\u4e2d\u7684\u7b97\u672f\u8fd0\u7b97\u7b26\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u51e0\u79cd：<\/li>\n<\/ul>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815045057-689ebcb1a0ba0.png\")
<\/p>\n
1.2 \u7b97\u672f\u8fd0\u7b97\u7b26\u7684\u57fa\u672c\u7528\u6cd5<\/h3>\n\n- \u5728Jinja2\u6a21\u677f\u4e2d，\u7b97\u672f\u8fd0\u7b97\u7b26\u7684\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b：<\/li>\n<\/ul>\n
{{ expression }} <\/p>\n
\n- \u5176\u4e2dexpression\u53ef\u4ee5\u5305\u542b\u53d8\u91cf\u548c\u7b97\u672f\u8fd0\u7b97\u7b26\u7684\u7ec4\u5408<\/li>\n<\/ul>\n
2 \u5e38\u7528\u7b97\u672f\u8fd0\u7b97\u7b26\u8be6\u89e3<\/h2>\n2.1 \u52a0\u6cd5\u8fd0\u7b97\u7b26（+）<\/h3>\n\n- \u52a0\u6cd5\u8fd0\u7b97\u7b26\u7528\u4e8e\u5c06\u4e24\u4e2a\u6570\u503c\u76f8\u52a0：<\/li>\n<\/ul>\n
{{ 5 + 3 }} <!– \u8f93\u51fa: 8 –>
\n{{ var1 + var2 }} <!– \u53d8\u91cfvar1\u548cvar2\u7684\u548c –> <\/p>\n
\n- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u5185\u5b58\u4f7f\u7528\u603b\u91cf<\/li>\n<\/ul>\n
# \u5047\u8bbe\u6211\u4eec\u6709\u5df2\u7528\u5185\u5b58\u548c\u53ef\u7528\u5185\u5b58\u53d8\u91cf
\ntotal_memory = {{ used_memory + free_memory }} <\/p>\n
2.2 \u51cf\u6cd5\u8fd0\u7b97\u7b26（-）<\/h3>\n\n- \u51cf\u6cd5\u8fd0\u7b97\u7b26\u7528\u4e8e\u4ece\u4e00\u4e2a\u6570\u503c\u4e2d\u51cf\u53bb\u53e6\u4e00\u4e2a\u6570\u503c：<\/li>\n<\/ul>\n
{{ 10 – 4 }} <!– \u8f93\u51fa: 6 –>
\n{{ max – min }} <!– \u53d8\u91cfmax\u548cmin\u7684\u5dee\u503c –> <\/p>\n
\n- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u5269\u4f59\u78c1\u76d8\u7a7a\u95f4<\/li>\n<\/ul>\n
# \u5047\u8bbe\u6211\u4eec\u6709\u603b\u78c1\u76d8\u7a7a\u95f4\u548c\u5df2\u7528\u7a7a\u95f4\u53d8\u91cf
\nfree_space = {{ total_disk – used_disk }} <\/p>\n
2.3 \u4e58\u6cd5\u8fd0\u7b97\u7b26（*）<\/h3>\n\n- \u4e58\u6cd5\u8fd0\u7b97\u7b26\u7528\u4e8e\u5c06\u4e24\u4e2a\u6570\u503c\u76f8\u4e58：<\/li>\n<\/ul>\n
{{ 4 * 5 }} <!– \u8f93\u51fa: 20 –>
\n{{ multiplier * base }} <!– \u53d8\u91cfmultiplier\u548cbase\u7684\u4e58\u79ef –> <\/p>\n
\n- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u6839\u636eCPU\u6838\u5fc3\u6570\u8ba1\u7b97Nginx\u5de5\u4f5c\u8fdb\u7a0b\u6570<\/li>\n<\/ul>\n
worker_processes {{ ansible_processor_vcpus * 2 }}; <\/p>\n
2.4 \u9664\u6cd5\u8fd0\u7b97\u7b26（\/）<\/h3>\n\n- \u9664\u6cd5\u8fd0\u7b97\u7b26\u7528\u4e8e\u5c06\u4e00\u4e2a\u6570\u503c\u9664\u4ee5\u53e6\u4e00\u4e2a\u6570\u503c，\u7ed3\u679c\u4e3a\u6d6e\u70b9\u6570：<\/li>\n<\/ul>\n
{{ 10 \/ 2 }} <!– \u8f93\u51fa: 5.0 –>
\n{{ total \/ count }} <!– \u53d8\u91cftotal\u9664\u4ee5count\u7684\u7ed3\u679c –> <\/p>\n
\n- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u5e73\u5747\u8bf7\u6c42\u5904\u7406\u65f6\u95f4<\/li>\n<\/ul>\n
avg_response_time = {{ total_response_time \/ request_count }} <\/p>\n
2.5 \u6574\u9664\u8fd0\u7b97\u7b26（\/\/）<\/h3>\n\n- \u6574\u9664\u8fd0\u7b97\u7b26\u7528\u4e8e\u6267\u884c\u6574\u6570\u9664\u6cd5，\u7ed3\u679c\u4e3a\u6574\u6570：<\/li>\n<\/ul>\n
{{ 10 \/\/ 3 }} <!– \u8f93\u51fa: 3 –>
\n{{ total \/\/ count }} <!– \u53d8\u91cftotal\u9664\u4ee5count\u7684\u6574\u6570\u7ed3\u679c –> <\/p>\n
\n- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u9700\u8981\u591a\u5c11\u4e2a\u670d\u52a1\u5668\u5b9e\u4f8b<\/li>\n<\/ul>\n
server_instances = {{ total_users \/\/ users_per_server }} <\/p>\n
2.6 \u53d6\u6a21\u8fd0\u7b97\u7b26（%）<\/h3>\n\n- \u53d6\u6a21\u8fd0\u7b97\u7b26\u7528\u4e8e\u8ba1\u7b97\u4e24\u4e2a\u6570\u76f8\u9664\u7684\u4f59\u6570：<\/li>\n<\/ul>\n
{{ 10 % 3 }} <!– \u8f93\u51fa: 1 –>
\n{{ number % divisor }} <!– \u53d8\u91cfnumber\u9664\u4ee5divisor\u7684\u4f59\u6570 –> <\/p>\n
\n- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u5224\u65ad\u5947\u5076\u6570<\/li>\n<\/ul>\n
{% if number % 2 == 0 %}
\n # \u5076\u6570\u5904\u7406\u903b\u8f91
\n{% else %}
\n # \u5947\u6570\u5904\u7406\u903b\u8f91
\n{% endif %} <\/p>\n
2.7 \u5e42\u8fd0\u7b97\u7b26（**）<\/h3>\n\n- \u5e42\u8fd0\u7b97\u7b26\u7528\u4e8e\u8ba1\u7b97\u4e00\u4e2a\u6570\u7684\u5e42：<\/li>\n<\/ul>\n
{{ 2 ** 3 }} <!– \u8f93\u51fa: 8 –>
\n{{ base ** exponent }} <!– \u53d8\u91cfbase\u7684exponent\u6b21\u5e42 –> <\/p>\n
\n- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u8d44\u6e90\u589e\u957f\u9884\u6d4b<\/li>\n<\/ul>\n
predicted_growth = {{ current_size * (1.5 ** years) }} <\/p>\n
3 \u590d\u6742\u7b97\u672f\u8868\u8fbe\u5f0f\u4e0e\u8fd0\u7b97\u4f18\u5148\u7ea7<\/h2>\n3.1 \u8fd0\u7b97\u4f18\u5148\u7ea7<\/h3>\n
\u5728Jinja2\u6a21\u677f\u4e2d，\u7b97\u672f\u8fd0\u7b97\u7b26\u7684\u4f18\u5148\u7ea7\u4e0ePython\u76f8\u540c：<\/p>\n
\n- \u5e42\u8fd0\u7b97（**）<\/li>\n
- \u6b63\u8d1f\u53f7（+x, -x）<\/li>\n
- \u4e58\u6cd5\u3001\u9664\u6cd5\u3001\u53d6\u6a21（*, \/, %）<\/li>\n
- \u52a0\u6cd5\u3001\u51cf\u6cd5（+, -）<\/li>\n<\/ul>\n
3.2 \u4f7f\u7528\u62ec\u53f7\u63a7\u5236\u4f18\u5148\u7ea7<\/h3>\n\n- \u53ef\u4ee5\u4f7f\u7528\u62ec\u53f7\u6539\u53d8\u9ed8\u8ba4\u7684\u8fd0\u7b97\u4f18\u5148\u7ea7：<\/li>\n<\/ul>\n
{{ (2 + 3) * 4 }} <!– \u8f93\u51fa: 20 –>
\n{{ 2 + (3 * 4) }} <!– \u8f93\u51fa: 14 –> <\/p>\n
3.3 \u590d\u6742\u8868\u8fbe\u5f0f\u793a\u4f8b<\/h3>\n
{{ (a + b) * c \/ d }}
\n{{ (max_value – min_value) \/ (count – 1) }}
\n{{ (base * multiplier) + offset }} <\/p>\n
4 \u7b97\u672f\u8fd0\u7b97\u7b26\u7684\u5e94\u7528\u6848\u4f8b<\/h2>\n4.1 \u52a8\u6001\u8ba1\u7b97Nginx\u5de5\u4f5c\u8fdb\u7a0b\u6570<\/h3>\n
—
\n– hosts: webservers
\n vars:
\n # \u6839\u636eCPU\u6838\u5fc3\u6570\u8ba1\u7b97\u5de5\u4f5c\u8fdb\u7a0b\u6570
\n worker_processes: "{{ ansible_processor_vcpus * 2 }}"
\n tasks:
\n – name: Configure nginx
\n template:
\n src: nginx.conf.j2
\n dest: \/etc\/nginx\/nginx.conf <\/p>\n
\n- \u6a21\u677f\u6587\u4ef6nginx.conf.j2：<\/li>\n<\/ul>\n
worker_processes {{ worker_processes }}; <\/p>\n
4.2 \u52a8\u6001\u8ba1\u7b97\u670d\u52a1\u5668\u5185\u5b58\u5206\u914d<\/h3>\n
—
\n– hosts: app_servers
\n vars:
\n total_memory: "{{ ansible_memtotal_mb }}"
\n # \u4e3a\u7cfb\u7edf\u4fdd\u755920%\u5185\u5b58，\u5176\u4f59\u5206\u914d\u7ed9\u5e94\u7528
\n app_memory: "{{ (total_memory * 0.8) | int }}"
\n tasks:
\n – name: Configure Java memory settings
\n template:
\n src: java.conf.j2
\n dest: \/etc\/java.conf <\/p>\n
\n- \u6a21\u677f\u6587\u4ef6java.conf.j2：<\/li>\n<\/ul>\n
-Xms{{ app_memory \/\/ 2 }}m
\n-Xmx{{ app_memory }}m <\/p>\n
4.3 \u52a8\u6001\u8ba1\u7b97\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u5927\u5c0f<\/h3>\n
—
\n– hosts: databases
\n vars:
\n # \u6839\u636eCPU\u6838\u5fc3\u6570\u548c\u5185\u5b58\u5927\u5c0f\u8ba1\u7b97\u8fde\u63a5\u6c60\u5927\u5c0f
\n connection_pool: "{{ (ansible_processor_vcpus * ansible_memtotal_mb \/\/ 1024) | int }}"
\n tasks:
\n – name: Configure database connection pool
\n template:
\n src: db_pool.conf.j2
\n dest: \/etc\/db_pool.conf <\/p>\n
\n- \u6a21\u677f\u6587\u4ef6db_pool.conf.j2：<\/li>\n<\/ul>\n
maximumPoolSize = {{ connection_pool }}
\nminimumIdle = {{ (connection_pool * 0.3) | int }} <\/p>\n
5 \u7b97\u672f\u8fd0\u7b97\u7b26\u4e0e\u8fc7\u6ee4\u5668\u7684\u7ed3\u5408\u4f7f\u7528<\/h2>\n5.1 \u5e38\u7528\u8fc7\u6ee4\u5668\u4e0e\u7b97\u672f\u8fd0\u7b97\u7684\u7ed3\u5408<\/h3>\n
{{ (total \/ count) | round(2) }} <!– \u7ed3\u679c\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570 –>
\n{{ (value * 100) | int }} <!– \u8f6c\u6362\u4e3a\u6574\u6570 –>
\n{{ (number ** 2) | abs }} <!– \u8ba1\u7b97\u7edd\u5bf9\u503c –> <\/p>\n
5.2 \u683c\u5f0f\u5316\u8f93\u51fa<\/h3>\n
{{ (memory \/ 1024) | round(2) }} GB
\n{{ (percentage * 100) | int }}% <\/p>\n
5.3 \u6761\u4ef6\u5224\u65ad\u4e2d\u7684\u7b97\u672f\u8fd0\u7b97<\/h3>\n
{% if (max_connections * 0.8) > current_connections %}
\n # \u8b66\u544a：\u8fde\u63a5\u6570\u63a5\u8fd1\u4e0a\u9650
\n{% endif %} <\/p>\n
6 \u603b\u7ed3<\/h2>\n
\u7b97\u672f\u8fd0\u7b97\u7b26\u4e0eAnsible\u6a21\u677f\u7684\u7ed3\u5408\u4f7f\u7528，\u4f7f\u5f97\u6211\u4eec\u80fd\u591f\u6839\u636e\u52a8\u6001\u8ba1\u7b97\u7684\u503c\u751f\u6210\u914d\u7f6e\u6587\u4ef6，\u5927\u5927\u63d0\u9ad8\u4e86\u914d\u7f6e\u7ba1\u7406\u7684\u7075\u6d3b\u6027\u548c\u81ea\u52a8\u5316\u7a0b\u5ea6\u3002\u901a\u8fc7\u5408\u7406\u8fd0\u7528\u8fd9\u4e9b\u8fd0\u7b97\u7b26，\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u66f4\u52a0\u667a\u80fd\u3001\u9002\u5e94\u4e0d\u540c\u73af\u5883\u7684\u914d\u7f6e\u6a21\u677f\u3002<\/p>\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d，\u9700\u8981\u6ce8\u610f\u7c7b\u578b\u8f6c\u6362\u3001\u9664\u96f6\u9519\u8bef\u548c\u6d6e\u70b9\u6570\u7cbe\u5ea6\u7b49\u95ee\u9898，\u786e\u4fdd\u6a21\u677f\u5728\u5404\u79cd\u60c5\u51b5\u4e0b\u90fd\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb36\u6b21\u3002\u7b97\u672f\u8fd0\u7b97\u7b26\u4e0eAnsible\u6a21\u677f\u7684\u7ed3\u5408\u4f7f\u7528\uff0c\u4f7f\u5f97\u6211\u4eec\u80fd\u591f\u6839\u636e\u52a8\u6001\u8ba1\u7b97\u7684\u503c\u751f\u6210\u914d\u7f6e\u6587\u4ef6\uff0c\u5927\u5927\u63d0\u9ad8\u4e86\u914d\u7f6e\u7ba1\u7406\u7684\u7075\u6d3b\u6027\u548c\u81ea\u52a8\u5316\u7a0b\u5ea6\u3002\u901a\u8fc7\u5408\u7406\u8fd0\u7528\u8fd9\u4e9b\u8fd0\u7b97\u7b26\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u66f4\u52a0\u667a\u80fd\u3001\u9002\u5e94\u4e0d\u540c\u73af\u5883\u7684\u914d\u7f6e\u6a21\u677f\u3002\u5728Ansible\u6a21\u677f\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u5bf9\u53d8\u91cf\u8fdb\u884c\u7b97\u672f\u8fd0\u7b97\uff0c\u4ee5\u751f\u6210\u7b26\u5408\u7279\u5b9a\u9700\u6c42\u7684\u914d\u7f6e\u503c\u3002Jinja2\u6a21\u677f\u5f15\u64ce\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u7b97\u672f\u8fd0\u7b97\u7b26\uff0c\u4f7f\u5f97\u5728\u6a21\u677f\u4e2d\u8fdb\u884c\u6570\u5b66\u8ba1\u7b97\u6210\u4e3a\u53ef\u80fd\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u9700\u8981\u6ce8\u610f\u7c7b\u578b\u8f6c\u6362\u3001\u9664\u96f6\u9519\u8bef\u548c\u6d6e\u70b9\u6570\u7cbe\u5ea6\u7b49\u95ee\u9898\uff0c\u786e\u4fdd\u6a21\u677f\u5728\u5404\u79cd\u60c5\u51b5\u4e0b\u90fd\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n","protected":false},"author":2,"featured_media":57448,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1064,6000,6001,6002,395,1451,44],"topic":[],"class_list":{"0":"post-57449","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-server","8":"tag-ansible","10":"tag-jinja2","11":"tag-6002","12":"tag-395","13":"tag-1451","14":"tag-44"},"yoast_head":"\n
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{{ expression }} <\/p>\n
\n- \u5176\u4e2dexpression\u53ef\u4ee5\u5305\u542b\u53d8\u91cf\u548c\u7b97\u672f\u8fd0\u7b97\u7b26\u7684\u7ec4\u5408<\/li>\n<\/ul>\n
2 \u5e38\u7528\u7b97\u672f\u8fd0\u7b97\u7b26\u8be6\u89e3<\/h2>\n2.1 \u52a0\u6cd5\u8fd0\u7b97\u7b26（+）<\/h3>\n\n- \u52a0\u6cd5\u8fd0\u7b97\u7b26\u7528\u4e8e\u5c06\u4e24\u4e2a\u6570\u503c\u76f8\u52a0：<\/li>\n<\/ul>\n
{{ 5 + 3 }} <!– \u8f93\u51fa: 8 –>
\n{{ var1 + var2 }} <!– \u53d8\u91cfvar1\u548cvar2\u7684\u548c –> <\/p>\n
\n- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u5185\u5b58\u4f7f\u7528\u603b\u91cf<\/li>\n<\/ul>\n
# \u5047\u8bbe\u6211\u4eec\u6709\u5df2\u7528\u5185\u5b58\u548c\u53ef\u7528\u5185\u5b58\u53d8\u91cf
\ntotal_memory = {{ used_memory + free_memory }} <\/p>\n
2.2 \u51cf\u6cd5\u8fd0\u7b97\u7b26（-）<\/h3>\n\n- \u51cf\u6cd5\u8fd0\u7b97\u7b26\u7528\u4e8e\u4ece\u4e00\u4e2a\u6570\u503c\u4e2d\u51cf\u53bb\u53e6\u4e00\u4e2a\u6570\u503c：<\/li>\n<\/ul>\n
{{ 10 – 4 }} <!– \u8f93\u51fa: 6 –>
\n{{ max – min }} <!– \u53d8\u91cfmax\u548cmin\u7684\u5dee\u503c –> <\/p>\n
\n- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u5269\u4f59\u78c1\u76d8\u7a7a\u95f4<\/li>\n<\/ul>\n
# \u5047\u8bbe\u6211\u4eec\u6709\u603b\u78c1\u76d8\u7a7a\u95f4\u548c\u5df2\u7528\u7a7a\u95f4\u53d8\u91cf
\nfree_space = {{ total_disk – used_disk }} <\/p>\n
2.3 \u4e58\u6cd5\u8fd0\u7b97\u7b26（*）<\/h3>\n\n- \u4e58\u6cd5\u8fd0\u7b97\u7b26\u7528\u4e8e\u5c06\u4e24\u4e2a\u6570\u503c\u76f8\u4e58：<\/li>\n<\/ul>\n
{{ 4 * 5 }} <!– \u8f93\u51fa: 20 –>
\n{{ multiplier * base }} <!– \u53d8\u91cfmultiplier\u548cbase\u7684\u4e58\u79ef –> <\/p>\n
\n- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u6839\u636eCPU\u6838\u5fc3\u6570\u8ba1\u7b97Nginx\u5de5\u4f5c\u8fdb\u7a0b\u6570<\/li>\n<\/ul>\n
worker_processes {{ ansible_processor_vcpus * 2 }}; <\/p>\n
2.4 \u9664\u6cd5\u8fd0\u7b97\u7b26（\/）<\/h3>\n\n- \u9664\u6cd5\u8fd0\u7b97\u7b26\u7528\u4e8e\u5c06\u4e00\u4e2a\u6570\u503c\u9664\u4ee5\u53e6\u4e00\u4e2a\u6570\u503c，\u7ed3\u679c\u4e3a\u6d6e\u70b9\u6570：<\/li>\n<\/ul>\n
{{ 10 \/ 2 }} <!– \u8f93\u51fa: 5.0 –>
\n{{ total \/ count }} <!– \u53d8\u91cftotal\u9664\u4ee5count\u7684\u7ed3\u679c –> <\/p>\n
\n- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u5e73\u5747\u8bf7\u6c42\u5904\u7406\u65f6\u95f4<\/li>\n<\/ul>\n
avg_response_time = {{ total_response_time \/ request_count }} <\/p>\n
2.5 \u6574\u9664\u8fd0\u7b97\u7b26（\/\/）<\/h3>\n\n- \u6574\u9664\u8fd0\u7b97\u7b26\u7528\u4e8e\u6267\u884c\u6574\u6570\u9664\u6cd5，\u7ed3\u679c\u4e3a\u6574\u6570：<\/li>\n<\/ul>\n
{{ 10 \/\/ 3 }} <!– \u8f93\u51fa: 3 –>
\n{{ total \/\/ count }} <!– \u53d8\u91cftotal\u9664\u4ee5count\u7684\u6574\u6570\u7ed3\u679c –> <\/p>\n
\n- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u9700\u8981\u591a\u5c11\u4e2a\u670d\u52a1\u5668\u5b9e\u4f8b<\/li>\n<\/ul>\n
server_instances = {{ total_users \/\/ users_per_server }} <\/p>\n
2.6 \u53d6\u6a21\u8fd0\u7b97\u7b26（%）<\/h3>\n\n- \u53d6\u6a21\u8fd0\u7b97\u7b26\u7528\u4e8e\u8ba1\u7b97\u4e24\u4e2a\u6570\u76f8\u9664\u7684\u4f59\u6570：<\/li>\n<\/ul>\n
{{ 10 % 3 }} <!– \u8f93\u51fa: 1 –>
\n{{ number % divisor }} <!– \u53d8\u91cfnumber\u9664\u4ee5divisor\u7684\u4f59\u6570 –> <\/p>\n
\n- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u5224\u65ad\u5947\u5076\u6570<\/li>\n<\/ul>\n
{% if number % 2 == 0 %}
\n # \u5076\u6570\u5904\u7406\u903b\u8f91
\n{% else %}
\n # \u5947\u6570\u5904\u7406\u903b\u8f91
\n{% endif %} <\/p>\n
2.7 \u5e42\u8fd0\u7b97\u7b26（**）<\/h3>\n\n- \u5e42\u8fd0\u7b97\u7b26\u7528\u4e8e\u8ba1\u7b97\u4e00\u4e2a\u6570\u7684\u5e42：<\/li>\n<\/ul>\n
{{ 2 ** 3 }} <!– \u8f93\u51fa: 8 –>
\n{{ base ** exponent }} <!– \u53d8\u91cfbase\u7684exponent\u6b21\u5e42 –> <\/p>\n
\n- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u8d44\u6e90\u589e\u957f\u9884\u6d4b<\/li>\n<\/ul>\n
predicted_growth = {{ current_size * (1.5 ** years) }} <\/p>\n
3 \u590d\u6742\u7b97\u672f\u8868\u8fbe\u5f0f\u4e0e\u8fd0\u7b97\u4f18\u5148\u7ea7<\/h2>\n3.1 \u8fd0\u7b97\u4f18\u5148\u7ea7<\/h3>\n
\u5728Jinja2\u6a21\u677f\u4e2d，\u7b97\u672f\u8fd0\u7b97\u7b26\u7684\u4f18\u5148\u7ea7\u4e0ePython\u76f8\u540c：<\/p>\n
\n- \u5e42\u8fd0\u7b97（**）<\/li>\n
- \u6b63\u8d1f\u53f7（+x, -x）<\/li>\n
- \u4e58\u6cd5\u3001\u9664\u6cd5\u3001\u53d6\u6a21（*, \/, %）<\/li>\n
- \u52a0\u6cd5\u3001\u51cf\u6cd5（+, -）<\/li>\n<\/ul>\n
3.2 \u4f7f\u7528\u62ec\u53f7\u63a7\u5236\u4f18\u5148\u7ea7<\/h3>\n\n- \u53ef\u4ee5\u4f7f\u7528\u62ec\u53f7\u6539\u53d8\u9ed8\u8ba4\u7684\u8fd0\u7b97\u4f18\u5148\u7ea7：<\/li>\n<\/ul>\n
{{ (2 + 3) * 4 }} <!– \u8f93\u51fa: 20 –>
\n{{ 2 + (3 * 4) }} <!– \u8f93\u51fa: 14 –> <\/p>\n
3.3 \u590d\u6742\u8868\u8fbe\u5f0f\u793a\u4f8b<\/h3>\n
{{ (a + b) * c \/ d }}
\n{{ (max_value – min_value) \/ (count – 1) }}
\n{{ (base * multiplier) + offset }} <\/p>\n
4 \u7b97\u672f\u8fd0\u7b97\u7b26\u7684\u5e94\u7528\u6848\u4f8b<\/h2>\n4.1 \u52a8\u6001\u8ba1\u7b97Nginx\u5de5\u4f5c\u8fdb\u7a0b\u6570<\/h3>\n
—
\n– hosts: webservers
\n vars:
\n # \u6839\u636eCPU\u6838\u5fc3\u6570\u8ba1\u7b97\u5de5\u4f5c\u8fdb\u7a0b\u6570
\n worker_processes: "{{ ansible_processor_vcpus * 2 }}"
\n tasks:
\n – name: Configure nginx
\n template:
\n src: nginx.conf.j2
\n dest: \/etc\/nginx\/nginx.conf <\/p>\n
\n- \u6a21\u677f\u6587\u4ef6nginx.conf.j2：<\/li>\n<\/ul>\n
worker_processes {{ worker_processes }}; <\/p>\n
4.2 \u52a8\u6001\u8ba1\u7b97\u670d\u52a1\u5668\u5185\u5b58\u5206\u914d<\/h3>\n
—
\n– hosts: app_servers
\n vars:
\n total_memory: "{{ ansible_memtotal_mb }}"
\n # \u4e3a\u7cfb\u7edf\u4fdd\u755920%\u5185\u5b58，\u5176\u4f59\u5206\u914d\u7ed9\u5e94\u7528
\n app_memory: "{{ (total_memory * 0.8) | int }}"
\n tasks:
\n – name: Configure Java memory settings
\n template:
\n src: java.conf.j2
\n dest: \/etc\/java.conf <\/p>\n
\n- \u6a21\u677f\u6587\u4ef6java.conf.j2：<\/li>\n<\/ul>\n
-Xms{{ app_memory \/\/ 2 }}m
\n-Xmx{{ app_memory }}m <\/p>\n
4.3 \u52a8\u6001\u8ba1\u7b97\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u5927\u5c0f<\/h3>\n
—
\n– hosts: databases
\n vars:
\n # \u6839\u636eCPU\u6838\u5fc3\u6570\u548c\u5185\u5b58\u5927\u5c0f\u8ba1\u7b97\u8fde\u63a5\u6c60\u5927\u5c0f
\n connection_pool: "{{ (ansible_processor_vcpus * ansible_memtotal_mb \/\/ 1024) | int }}"
\n tasks:
\n – name: Configure database connection pool
\n template:
\n src: db_pool.conf.j2
\n dest: \/etc\/db_pool.conf <\/p>\n
\n- \u6a21\u677f\u6587\u4ef6db_pool.conf.j2：<\/li>\n<\/ul>\n
maximumPoolSize = {{ connection_pool }}
\nminimumIdle = {{ (connection_pool * 0.3) | int }} <\/p>\n
5 \u7b97\u672f\u8fd0\u7b97\u7b26\u4e0e\u8fc7\u6ee4\u5668\u7684\u7ed3\u5408\u4f7f\u7528<\/h2>\n5.1 \u5e38\u7528\u8fc7\u6ee4\u5668\u4e0e\u7b97\u672f\u8fd0\u7b97\u7684\u7ed3\u5408<\/h3>\n
{{ (total \/ count) | round(2) }} <!– \u7ed3\u679c\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570 –>
\n{{ (value * 100) | int }} <!– \u8f6c\u6362\u4e3a\u6574\u6570 –>
\n{{ (number ** 2) | abs }} <!– \u8ba1\u7b97\u7edd\u5bf9\u503c –> <\/p>\n
5.2 \u683c\u5f0f\u5316\u8f93\u51fa<\/h3>\n
{{ (memory \/ 1024) | round(2) }} GB
\n{{ (percentage * 100) | int }}% <\/p>\n
5.3 \u6761\u4ef6\u5224\u65ad\u4e2d\u7684\u7b97\u672f\u8fd0\u7b97<\/h3>\n
{% if (max_connections * 0.8) > current_connections %}
\n # \u8b66\u544a：\u8fde\u63a5\u6570\u63a5\u8fd1\u4e0a\u9650
\n{% endif %} <\/p>\n
6 \u603b\u7ed3<\/h2>\n
\u7b97\u672f\u8fd0\u7b97\u7b26\u4e0eAnsible\u6a21\u677f\u7684\u7ed3\u5408\u4f7f\u7528，\u4f7f\u5f97\u6211\u4eec\u80fd\u591f\u6839\u636e\u52a8\u6001\u8ba1\u7b97\u7684\u503c\u751f\u6210\u914d\u7f6e\u6587\u4ef6，\u5927\u5927\u63d0\u9ad8\u4e86\u914d\u7f6e\u7ba1\u7406\u7684\u7075\u6d3b\u6027\u548c\u81ea\u52a8\u5316\u7a0b\u5ea6\u3002\u901a\u8fc7\u5408\u7406\u8fd0\u7528\u8fd9\u4e9b\u8fd0\u7b97\u7b26，\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u66f4\u52a0\u667a\u80fd\u3001\u9002\u5e94\u4e0d\u540c\u73af\u5883\u7684\u914d\u7f6e\u6a21\u677f\u3002<\/p>\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d，\u9700\u8981\u6ce8\u610f\u7c7b\u578b\u8f6c\u6362\u3001\u9664\u96f6\u9519\u8bef\u548c\u6d6e\u70b9\u6570\u7cbe\u5ea6\u7b49\u95ee\u9898，\u786e\u4fdd\u6a21\u677f\u5728\u5404\u79cd\u60c5\u51b5\u4e0b\u90fd\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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- \u52a0\u6cd5\u8fd0\u7b97\u7b26\u7528\u4e8e\u5c06\u4e24\u4e2a\u6570\u503c\u76f8\u52a0：<\/li>\n<\/ul>\n
{{ 5 + 3 }} <!– \u8f93\u51fa: 8 –>
\n{{ var1 + var2 }} <!– \u53d8\u91cfvar1\u548cvar2\u7684\u548c –> <\/p>\n- \n
- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u5185\u5b58\u4f7f\u7528\u603b\u91cf<\/li>\n<\/ul>\n
# \u5047\u8bbe\u6211\u4eec\u6709\u5df2\u7528\u5185\u5b58\u548c\u53ef\u7528\u5185\u5b58\u53d8\u91cf
\ntotal_memory = {{ used_memory + free_memory }} <\/p>\n2.2 \u51cf\u6cd5\u8fd0\u7b97\u7b26（-）<\/h3>\n
- \n
- \u51cf\u6cd5\u8fd0\u7b97\u7b26\u7528\u4e8e\u4ece\u4e00\u4e2a\u6570\u503c\u4e2d\u51cf\u53bb\u53e6\u4e00\u4e2a\u6570\u503c：<\/li>\n<\/ul>\n
{{ 10 – 4 }} <!– \u8f93\u51fa: 6 –>
\n{{ max – min }} <!– \u53d8\u91cfmax\u548cmin\u7684\u5dee\u503c –> <\/p>\n- \n
- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u5269\u4f59\u78c1\u76d8\u7a7a\u95f4<\/li>\n<\/ul>\n
# \u5047\u8bbe\u6211\u4eec\u6709\u603b\u78c1\u76d8\u7a7a\u95f4\u548c\u5df2\u7528\u7a7a\u95f4\u53d8\u91cf
\nfree_space = {{ total_disk – used_disk }} <\/p>\n2.3 \u4e58\u6cd5\u8fd0\u7b97\u7b26（*）<\/h3>\n
- \n
- \u4e58\u6cd5\u8fd0\u7b97\u7b26\u7528\u4e8e\u5c06\u4e24\u4e2a\u6570\u503c\u76f8\u4e58：<\/li>\n<\/ul>\n
{{ 4 * 5 }} <!– \u8f93\u51fa: 20 –>
\n{{ multiplier * base }} <!– \u53d8\u91cfmultiplier\u548cbase\u7684\u4e58\u79ef –> <\/p>\n- \n
- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u6839\u636eCPU\u6838\u5fc3\u6570\u8ba1\u7b97Nginx\u5de5\u4f5c\u8fdb\u7a0b\u6570<\/li>\n<\/ul>\n
worker_processes {{ ansible_processor_vcpus * 2 }}; <\/p>\n
2.4 \u9664\u6cd5\u8fd0\u7b97\u7b26（\/）<\/h3>\n
- \n
- \u9664\u6cd5\u8fd0\u7b97\u7b26\u7528\u4e8e\u5c06\u4e00\u4e2a\u6570\u503c\u9664\u4ee5\u53e6\u4e00\u4e2a\u6570\u503c，\u7ed3\u679c\u4e3a\u6d6e\u70b9\u6570：<\/li>\n<\/ul>\n
{{ 10 \/ 2 }} <!– \u8f93\u51fa: 5.0 –>
\n{{ total \/ count }} <!– \u53d8\u91cftotal\u9664\u4ee5count\u7684\u7ed3\u679c –> <\/p>\n- \n
- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u5e73\u5747\u8bf7\u6c42\u5904\u7406\u65f6\u95f4<\/li>\n<\/ul>\n
avg_response_time = {{ total_response_time \/ request_count }} <\/p>\n
2.5 \u6574\u9664\u8fd0\u7b97\u7b26（\/\/）<\/h3>\n
- \n
- \u6574\u9664\u8fd0\u7b97\u7b26\u7528\u4e8e\u6267\u884c\u6574\u6570\u9664\u6cd5，\u7ed3\u679c\u4e3a\u6574\u6570：<\/li>\n<\/ul>\n
{{ 10 \/\/ 3 }} <!– \u8f93\u51fa: 3 –>
\n{{ total \/\/ count }} <!– \u53d8\u91cftotal\u9664\u4ee5count\u7684\u6574\u6570\u7ed3\u679c –> <\/p>\n- \n
- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u9700\u8981\u591a\u5c11\u4e2a\u670d\u52a1\u5668\u5b9e\u4f8b<\/li>\n<\/ul>\n
server_instances = {{ total_users \/\/ users_per_server }} <\/p>\n
2.6 \u53d6\u6a21\u8fd0\u7b97\u7b26（%）<\/h3>\n
- \n
- \u53d6\u6a21\u8fd0\u7b97\u7b26\u7528\u4e8e\u8ba1\u7b97\u4e24\u4e2a\u6570\u76f8\u9664\u7684\u4f59\u6570：<\/li>\n<\/ul>\n
{{ 10 % 3 }} <!– \u8f93\u51fa: 1 –>
\n{{ number % divisor }} <!– \u53d8\u91cfnumber\u9664\u4ee5divisor\u7684\u4f59\u6570 –> <\/p>\n- \n
- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u5224\u65ad\u5947\u5076\u6570<\/li>\n<\/ul>\n
{% if number % 2 == 0 %}
\n # \u5076\u6570\u5904\u7406\u903b\u8f91
\n{% else %}
\n # \u5947\u6570\u5904\u7406\u903b\u8f91
\n{% endif %} <\/p>\n2.7 \u5e42\u8fd0\u7b97\u7b26（**）<\/h3>\n
- \n
- \u5e42\u8fd0\u7b97\u7b26\u7528\u4e8e\u8ba1\u7b97\u4e00\u4e2a\u6570\u7684\u5e42：<\/li>\n<\/ul>\n
{{ 2 ** 3 }} <!– \u8f93\u51fa: 8 –>
\n{{ base ** exponent }} <!– \u53d8\u91cfbase\u7684exponent\u6b21\u5e42 –> <\/p>\n- \n
- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u8d44\u6e90\u589e\u957f\u9884\u6d4b<\/li>\n<\/ul>\n
predicted_growth = {{ current_size * (1.5 ** years) }} <\/p>\n
3 \u590d\u6742\u7b97\u672f\u8868\u8fbe\u5f0f\u4e0e\u8fd0\u7b97\u4f18\u5148\u7ea7<\/h2>\n
3.1 \u8fd0\u7b97\u4f18\u5148\u7ea7<\/h3>\n
\u5728Jinja2\u6a21\u677f\u4e2d，\u7b97\u672f\u8fd0\u7b97\u7b26\u7684\u4f18\u5148\u7ea7\u4e0ePython\u76f8\u540c：<\/p>\n
- \n
- \u5e42\u8fd0\u7b97（**）<\/li>\n
- \u6b63\u8d1f\u53f7（+x, -x）<\/li>\n
- \u4e58\u6cd5\u3001\u9664\u6cd5\u3001\u53d6\u6a21（*, \/, %）<\/li>\n
- \u52a0\u6cd5\u3001\u51cf\u6cd5（+, -）<\/li>\n<\/ul>\n
3.2 \u4f7f\u7528\u62ec\u53f7\u63a7\u5236\u4f18\u5148\u7ea7<\/h3>\n
- \n
- \u53ef\u4ee5\u4f7f\u7528\u62ec\u53f7\u6539\u53d8\u9ed8\u8ba4\u7684\u8fd0\u7b97\u4f18\u5148\u7ea7：<\/li>\n<\/ul>\n
{{ (2 + 3) * 4 }} <!– \u8f93\u51fa: 20 –>
\n{{ 2 + (3 * 4) }} <!– \u8f93\u51fa: 14 –> <\/p>\n3.3 \u590d\u6742\u8868\u8fbe\u5f0f\u793a\u4f8b<\/h3>\n
{{ (a + b) * c \/ d }}
\n{{ (max_value – min_value) \/ (count – 1) }}
\n{{ (base * multiplier) + offset }} <\/p>\n4 \u7b97\u672f\u8fd0\u7b97\u7b26\u7684\u5e94\u7528\u6848\u4f8b<\/h2>\n
4.1 \u52a8\u6001\u8ba1\u7b97Nginx\u5de5\u4f5c\u8fdb\u7a0b\u6570<\/h3>\n
—
\n– hosts: webservers
\n vars:
\n # \u6839\u636eCPU\u6838\u5fc3\u6570\u8ba1\u7b97\u5de5\u4f5c\u8fdb\u7a0b\u6570
\n worker_processes: "{{ ansible_processor_vcpus * 2 }}"
\n tasks:
\n – name: Configure nginx
\n template:
\n src: nginx.conf.j2
\n dest: \/etc\/nginx\/nginx.conf <\/p>\n- \n
- \u6a21\u677f\u6587\u4ef6nginx.conf.j2：<\/li>\n<\/ul>\n
worker_processes {{ worker_processes }}; <\/p>\n
4.2 \u52a8\u6001\u8ba1\u7b97\u670d\u52a1\u5668\u5185\u5b58\u5206\u914d<\/h3>\n
—
\n– hosts: app_servers
\n vars:
\n total_memory: "{{ ansible_memtotal_mb }}"
\n # \u4e3a\u7cfb\u7edf\u4fdd\u755920%\u5185\u5b58，\u5176\u4f59\u5206\u914d\u7ed9\u5e94\u7528
\n app_memory: "{{ (total_memory * 0.8) | int }}"
\n tasks:
\n – name: Configure Java memory settings
\n template:
\n src: java.conf.j2
\n dest: \/etc\/java.conf <\/p>\n- \n
- \u6a21\u677f\u6587\u4ef6java.conf.j2：<\/li>\n<\/ul>\n
-Xms{{ app_memory \/\/ 2 }}m
\n-Xmx{{ app_memory }}m <\/p>\n4.3 \u52a8\u6001\u8ba1\u7b97\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u5927\u5c0f<\/h3>\n
—
\n– hosts: databases
\n vars:
\n # \u6839\u636eCPU\u6838\u5fc3\u6570\u548c\u5185\u5b58\u5927\u5c0f\u8ba1\u7b97\u8fde\u63a5\u6c60\u5927\u5c0f
\n connection_pool: "{{ (ansible_processor_vcpus * ansible_memtotal_mb \/\/ 1024) | int }}"
\n tasks:
\n – name: Configure database connection pool
\n template:
\n src: db_pool.conf.j2
\n dest: \/etc\/db_pool.conf <\/p>\n- \n
- \u6a21\u677f\u6587\u4ef6db_pool.conf.j2：<\/li>\n<\/ul>\n
maximumPoolSize = {{ connection_pool }}
\nminimumIdle = {{ (connection_pool * 0.3) | int }} <\/p>\n5 \u7b97\u672f\u8fd0\u7b97\u7b26\u4e0e\u8fc7\u6ee4\u5668\u7684\u7ed3\u5408\u4f7f\u7528<\/h2>\n
5.1 \u5e38\u7528\u8fc7\u6ee4\u5668\u4e0e\u7b97\u672f\u8fd0\u7b97\u7684\u7ed3\u5408<\/h3>\n
{{ (total \/ count) | round(2) }} <!– \u7ed3\u679c\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570 –>
\n{{ (value * 100) | int }} <!– \u8f6c\u6362\u4e3a\u6574\u6570 –>
\n{{ (number ** 2) | abs }} <!– \u8ba1\u7b97\u7edd\u5bf9\u503c –> <\/p>\n5.2 \u683c\u5f0f\u5316\u8f93\u51fa<\/h3>\n
{{ (memory \/ 1024) | round(2) }} GB
\n{{ (percentage * 100) | int }}% <\/p>\n5.3 \u6761\u4ef6\u5224\u65ad\u4e2d\u7684\u7b97\u672f\u8fd0\u7b97<\/h3>\n
{% if (max_connections * 0.8) > current_connections %}
\n # \u8b66\u544a：\u8fde\u63a5\u6570\u63a5\u8fd1\u4e0a\u9650
\n{% endif %} <\/p>\n6 \u603b\u7ed3<\/h2>\n
\u7b97\u672f\u8fd0\u7b97\u7b26\u4e0eAnsible\u6a21\u677f\u7684\u7ed3\u5408\u4f7f\u7528，\u4f7f\u5f97\u6211\u4eec\u80fd\u591f\u6839\u636e\u52a8\u6001\u8ba1\u7b97\u7684\u503c\u751f\u6210\u914d\u7f6e\u6587\u4ef6，\u5927\u5927\u63d0\u9ad8\u4e86\u914d\u7f6e\u7ba1\u7406\u7684\u7075\u6d3b\u6027\u548c\u81ea\u52a8\u5316\u7a0b\u5ea6\u3002\u901a\u8fc7\u5408\u7406\u8fd0\u7528\u8fd9\u4e9b\u8fd0\u7b97\u7b26，\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u66f4\u52a0\u667a\u80fd\u3001\u9002\u5e94\u4e0d\u540c\u73af\u5883\u7684\u914d\u7f6e\u6a21\u677f\u3002<\/p>\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d，\u9700\u8981\u6ce8\u610f\u7c7b\u578b\u8f6c\u6362\u3001\u9664\u96f6\u9519\u8bef\u548c\u6d6e\u70b9\u6570\u7cbe\u5ea6\u7b49\u95ee\u9898，\u786e\u4fdd\u6a21\u677f\u5728\u5404\u79cd\u60c5\u51b5\u4e0b\u90fd\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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- \u6a21\u677f\u6587\u4ef6db_pool.conf.j2：<\/li>\n<\/ul>\n
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- \u53ef\u4ee5\u4f7f\u7528\u62ec\u53f7\u6539\u53d8\u9ed8\u8ba4\u7684\u8fd0\u7b97\u4f18\u5148\u7ea7：<\/li>\n<\/ul>\n
- \u5e94\u7528\u573a\u666f\u793a\u4f8b：\u8ba1\u7b97\u8d44\u6e90\u589e\u957f\u9884\u6d4b<\/li>\n<\/ul>\n
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