docker单机版的容器编排工具docker-compose基本使用

一.docker-compose概述

1.什么是docker-compose

    所谓的容器编排工具，指的是批量管理一组容器的方法。

    目前比较主流的单机编排工具自然是"docker-compose"，其可以描述docker如何启动一组容器。

    关于compose文件编写规范可参考GitHub链接哟:
        https://github.com/compose-spec/compose-spec/blob/master/spec.md

2.安装docker-compose

(1)需要先安装epel环境
    [root@docker201.oldboyedu.com ~]# yum -y install epel-release

(2)安装docker-compose
    [root@docker201.oldboyedu.com ~]# yum -y install docker-compose

二.docker-compose常用命令总结

推荐阅读:
    https://docs.docker.com/compose/gettingstarted/
    https://docs.docker.com/compose/compose-file/compose-file-v3/
    https://docs.docker.com/compose/compose-file/compose-file-v2/

三.docker-compose案例-zabbix5.4

1.编写zabbix的docker-compose.yml 配置文件

cat > docker-compose.yml <<EOF
version: '3'

services:
   mysql-server:
     image: mysql:8.0
     restart: always
     environment:
       MYSQL_ROOT_PASSWORD: root_pwd
       MYSQL_DATABASE: zabbix
       MYSQL_USER: zabbix
       MYSQL_PASSWORD: zabbix_pwd
     networks:
       - zabbix-net
     command: ["--character-set-server=utf8", "--collation-server=utf8_bin", "--default-authentication-plugin=mysql_native_password"]

   zabbix-java-gateway:
     image: zabbix/zabbix-java-gateway:alpine-5.4-latest
     restart: always
     networks:
       - zabbix-net

   zabbix-server:
     depends_on:
       - mysql-server
     image: zabbix/zabbix-server-mysql:alpine-5.4-latest
     restart: always
     environment:
       DB_SERVER_HOST: mysql-server
       MYSQL_DATABASE: zabbix
       MYSQL_USER: zabbix
       MYSQL_PASSWORD: zabbix_pwd
       MYSQL_ROOT_PASSWORD: root_pwd
       ZBX_JAVAGATEWAY: zabbix-java-gateway
     networks:
       - zabbix-net
     ports:
       - "10051:10051"

   zabbix-web-nginx-mysql:
     depends_on:
       - zabbix-server
     image: zabbix/zabbix-web-nginx-mysql:alpine-5.4-latest
     ports:
       - "80:8080"
     restart: always
     environment:
       DB_SERVER_HOST: mysql-server
       MYSQL_DATABASE: zabbix
       MYSQL_USER: zabbix
       MYSQL_PASSWORD: zabbix_pwd
       MYSQL_ROOT_PASSWORD: root_pwd
     networks:
       - zabbix-net

networks:
    zabbix-net:

EOF

2.使用docker-compose工具管理zabbix容器

docker-compose up:
    创建容器并启动.
docker-compose down:
    停止并删除容器.
docker-compose up -d :
    创建容器并后台启动
docker-compose start:
    容器全部启动 
docker-compose stop zabbix-server:
    仅启动abbix-server服务对应的容器.
docker-compose stop:
    容器全部停止
docker-compose stop zabbix-server:
    仅停止zabbix-server服务对应的容器.
docker-compose restart
    容器全部重启.

docker-compose scale zabbix-java-gateway=3  # 要注意端口冲突的问题,指定的services不应该有ports属性.

温馨提示:
    其他帮助信息请直接参考:"docker-compose --help"。