部署loki+promtail+grafana

deploy
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记录docker-compose快速搭建PLG日志系统，promtail + loki + grafana 部分操作步骤

1.在监控的服务器上安装Loki+Grafana

loki用于存储log，grafana用于展示log。docker-compose.yaml如下。

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version: "3"

networks:
  loki:

services:
  # 日志存储&解析
  loki:
    image: grafana/loki:2.4.2
    container_name: PLG-loki
    #volumes:
    #     - /usr/app/loki/loki-server/:/etc/loki/
    ports:
      - "3100:3100"
    command: -config.file=/etc/loki/local-config.yaml
    networks:
      - loki
  # 日志可视化
  grafana:
    image: grafana/grafana:latest
    container_name: PLG-grafana
    ports:
      - "3000:3000"
    volumes:
        # 挂载配置文件
      - /usr/app/loki/loki-server/grafana.ini:/etc/grafana/grafana.ini
    networks:
      - loki

grafana.ini获取方式：先不挂载这个文件，然后启动容器后进去用docker cp复制这个文件出来。主要修改[server]下的3个配置。如下

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# The public facing domain name used to access grafana from a browser
domain = uatapi.tecklesol.com

# The full public facing url you use in browser, used for redirects and emails
# If you use reverse proxy and sub path specify full url (with sub path)
root_url = %(protocol)s://%(domain)s:%(http_port)s/rainbow/lpg

# Serve Grafana from subpath specified in `root_url` setting. By default it is set to `false` for compatibility reasons.
serve_from_sub_path = true

domain:配置自己的域名

root_url:加上自己NGINX的后缀

serve_from_sub_path设置为true

nginx的配置如下

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#测试环境 Loki+Promtail+Grafana
server {
    listen 59565;
    location / {
        rewrite ^.+rainbow/lpg/?(.*)$ /$1 break;
        proxy_pass http://localhost:3000/;
        proxy_set_header Host $host;
    }
}

2. 在客户端机，也就是要获取log的机器上配置安装promtail

docker-compose.yaml如下

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version: "3"

services:
  promtail:
    image: grafana/promtail:2.4.2
    container_name: PLG-promtail
    volumes:
    	#把本机服务的log目录挂载进来
      - /usr/app/standalone_febs/febs-cloud/log:/var/log
      - $PWD:/etc/promtail/
    # 覆盖新的配置文件
    command: -config.file=/etc/promtail/promtail-config.yaml

配置文件promtail-config.yaml

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server:
  http_listen_port: 9080
  grpc_listen_port: 0

positions:
  filename: /tmp/positions.yaml

clients:
	# 这里表示把promtail注册到Loki，把log推去Loki中心
  - url: http://192.168.94.8:3100/loki/api/v1/push

scrape_configs:
- job_name: system
  static_configs:
  - targets:
      - localhost
    labels:
      job: varlogs
      __path__: /var/log/*/*/*log

3.在grafana中配置data source

url配置Loki的地址http://192.168.94.8:3100

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