Docker 使用traefik 进行负载均衡_docker traefik

traefik是一个http反向代理、负载均衡工具.
 
traefik支持较多的后端协议(http[s]、Websocket、TCP)
 
traefik支持多种容器框架(docker compose、Swarm、k8s、Mesos), 能识别API后台热更新配置.

1，创建Traefik

安装docker，自行百度

# traefik配置文件 traefik.toml
 
[global]
  checkNewVersion = false
  sendAnonymousUsage = false
 
[log]
  level = "WARN"
  format = "common"
 
[api]
  dashboard = true
  insecure = true
 
[ping]
 
[accessLog]
 
[providers]
  [providers.docker]
    watch = true
    exposedByDefault = false
    endpoint = "unix:///var/run/docker.sock"
    swarmMode = false
    useBindPortIP = false
    network = "traefik"
  [providers.file]
    watch = true
    directory = "/etc/traefik/config"
    debugLogGeneratedTemplate = true
 
[entryPoints]
  [entryPoints.http]
    address = ":80"
  [entryPoints.https]
    address = ":443"

FALLBACK

#docker-compose.yml
 
version: '3.7'
 
services:
 
  traefik:
    container_name: traefik
    image: traefik:v2.1.3
    restart: always
    ports:
      - 80:80
      - 443:443
      - 8080:8080
    networks:
      - traefik
    command: traefik --configFile /etc/traefik.toml
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - ./traefik.toml:/etc/traefik.toml:ro
      - ./config/:/etc/traefik/config/:ro
    healthcheck:
      test: ["CMD-SHELL", "wget -q --spider --proxy off localhost:8080/ping || exit 1"]
 
# 先创建外部网卡
# docker network create traefik
networks:
  traefik:
    external: true
    

FALLBACK

1.1 操作顺序

1，创建 traefik 文件目录
 
2，分别创建并保存（配置内容看上方），docker-compose.yml，traefik.toml
 
3，启动 docker-compose down && docker-compose up -d
 
4, 验证 浏览器输入ip 地址看到 404 即可成功；
 
5，访问8080 端口可看到 traefik dashboard 界面（下图）；

2，创建Nginx

# docker-compose.yml
version: "3.6"
    
    services:
    
      web_nginx:
        image: nginx:1.17.1-alpine
        restart: always
        expose:
          - 80
        networks:
          - traefik
        labels:
          - "traefik.enable=true"
          - "traefik.docker.network=traefik"
          - "traefik.http.routers.web_nginx.entrypoints=http"
          - "traefik.http.routers.web_nginx.rule=Host(`web_nginx.halobug.cn`)"
          - "traefik.http.services.web_nginx-backend.loadbalancer.server.scheme=http"
          - "traefik.http.services.web_nginx-backend.loadbalancer.server.port=80"
        logging:
          driver: "json-file"
          options:
            max-size: "1m"
    networks:
      traefik:
        external: true

FALLBACK

2.1 操作顺序

1，创建 web_nginx 文件目录
 
2，分别创建并保存（配置内容看上方），docker-compose.yml
 
3，启动命令稍有不同，docker-compose down && docker-compose up --scale web_nginx=10 -d
 
4，绑定hosts，127.0.0.1 web_nginx.halobug.cn
 
5，浏览器访问,http://web_nginx.halobug.cn
 
6，查看 traefik dashboard，http://127.0.0.1:8080/dashboard
 
7 ,查看日志 ，docker-compose logs -f

2.1.3,nginx容器启动成功后如下图

2.1.5,访问浏览器刷新多次，后查看日志

2.1.6,看到启动的web服务

2.1.7,log日志显示，已经负载到了每个容器