Promtail采集服务器本地日志存储到Loki

✅ 一、前提条件

🧩 二、下载 Promtail 二进制文件

# 替换为你想要的版本
VERSION="3.5.1"

# 创建目录
sudo mkdir -p /opt/promtail
cd /opt/promtail

# 下载并解压
curl -LO "https://github.com/grafana/loki/releases/download/v${VERSION}/promtail-linux-amd64.zip"
unzip promtail-linux-amd64.zip
mv promtail-linux-amd64 promtail
chmod +x promtail

📦 三、配置 Promtail

创建配置文件 /etc/promtail/promtail.yaml ，示例内容如下：

server:
http_listen_port: 9080
grpc_listen_port: 0

positions:
filename: /opt/promtail/positions.yaml

clients:
– url: http://10.55.2.40:31000/loki/api/v1/push

scrape_configs:
– job_name: yarn_logs
static_configs:
– targets:
– localhost
labels:
job: yarn_logs
__path__: /data/yarn/logs/**/**/*.out
– targets:
– localhost
labels:
job: yarn_logs
__path__: /data/yarn/logs/**/**/*.err
– targets:
– localhost
labels:
job: yarn_logs
__path__: /data/yarn/logs/**/**/*.log

🛠 四、创建 systemd 服务

创建服务文件 /etc/systemd/system/promtail.service：

[Unit]
Description=Promtail service
After=network.target

[Service]
Type=simple
ExecStart=/opt/promtail/promtail -config.file=/etc/promtail/promtail.yaml >> /var/log/promtail.log 2>> /var/log/promtail-error.log
Restart=on-failure

[Install]
WantedBy=multi-user.target

🚀 五、启动服务

sudo systemctl daemon-reexec
sudo systemctl daemon-reload
sudo systemctl enable –now promtail

检查状态：

systemctl status promtail

📋 六、验证日志采集

# 移动到日志采集的目录下
[root@uhadoop-1cef6n08gzqc-core1 ~]# cd /data/yarn/logs/application_1748242101840_0048/container_1748242101840_0048_01_000002
# 手动写入到sunwenbo.log 日志文件中
[root@uhadoop-1cef6n08gzqc-core1 container_1748242101840_0048_01_000002]# echo "sunwenbo test" > sunwenbo.log