loki, prometheus监控 & grafana仪表

概览：

• 镜像下载
• 官方文档
• 启用loki
  • 全局启用
  • 特定使用
• swarm配置

镜像下载

## grafana
docker pull grafana/loki:2.4.2
docker pull grafana/promtail:2.4.2
docker pull grafana/grafana:8.2.6

## prometheus
docker pull prom/node-exporter:latest
docker pull prom/prometheus:v2.35.0

官方文档

grafane

grafana loki

prometheus

启用loki

若需要全局使用loki推送docker日志，需要下载docker loki插件

docker plugin install grafana/loki-docker-driver:latest --alias loki --grant-all-permissions

loki可以全局启用，也可以对特定容器启用。

全局启用

[root@primary ~]# cat /etc/docker/daemon.json
{
  "log-driver": "loki",
  "log-opts": {
        "loki-url": "http://localhost:3100/loki/api/v1/push",
        "loki-batch-size": "400"
    }
}

特定使用

version: "3.9"

services:
  nginx:
    image: nginx:1.21.6-alpine
    networks:
      - ingress
    ports:
      - "80:80"
      - "443:443"
    configs:
      - source: nginx
        target: /etc/nginx/nginx.conf
    volumes:
      - ./conf.d:/etc/nginx/conf.d
    logging:
      driver: loki
      options:
        loki-url: "http://localhost:3100/loki/api/v1/push"
        loki-batch-size: "400"
        loki-retries: 3

swarm配置

version: "3.9"

services:
  grafana:
    image: grafana/grafana:8.2.6
    user: root
    ports:
      - "3000:3000"
    volumes:
      - /data/grafana:/var/lib/grafana
    configs:
      - source: grafana
        target: /etc/grafana/grafana.ini

  loki:
    image: grafana/loki:2.5.0
    user: root
    ports:
      - "3100:3100"
    command: -config.file=/etc/loki/local-config.yaml
    volumes:
      - /data/loki:/loki
    configs:
      - source: loki
        target: /etc/loki/local-config.yaml

  promtail:
    image: grafana/promtail:2.5.0
    user: root
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    command: -config.file=/etc/promtail/config.yml
    configs:
      - source: promtail
        target: /etc/promtail/config.yml
  
  prometheus:
    image: prom/prometheus:v2.34.0
    command: --config.file=/etc/prometheus/prometheus.yml --web.route-prefix=/ --web.external-url=https://<domain>/prometheus
    user: root
    ports:
      - "9090:9090"
    volumes:
       - /data/prometheus:/prometheus
    configs:
      - source: prometheus
        target: /etc/prometheus/prometheus.yml

  node-exporter:
    image: prom/node-exporter:latest
    command:
      - '--path.procfs=/host/proc'
      - '--path.rootfs=/rootfs'
      - '--path.sysfs=/host/sys'
      - '--collector.filesystem.mount-points-exclude=^/(sys|proc|dev|host|etc)($$|/)'
    volumes:
      - /proc:/host/proc
      - /sys:/host/sys
      - /:/rootfs
      - /etc/localtime:/etc/localtime

configs:
  loki:
    file: ./loki/local-config.yaml
  promtail:
    file: ./promtail/docker-config.yaml
  prometheus:
    file: ./prometheus/prometheus.yml
  grafana:
    file: ./grafana/grafana.ini