前提需要聲明版本
這里容器的連接是雙向的

yum install docker-compose -y
[root@master wordpress]# cat docker-compose.yml
version: '3'

services:
db:
image: mysql:5.7
volumes:
- /data/db_data:/var/lib/mysql
restart: always
environment:
MYSQL_ROOT_PASSWORD: somewordpress
MYSQL_DATABASE: wordpress
MYSQL_USER: wordpress
MYSQL_PASSWORD: wordpress

wordpress:
depends_on:
- db
image: wordpress:latest
volumes:
- /data/web_data:/var/www/html
ports:
- "80:80"
restart: always
environment:
WORDPRESS_DB_HOST: db
WORDPRESS_DB_USER: wordpress
WORDPRESS_DB_PASSWORD: wordpress

docker-compose up -d #啟動服務(wù)
docker-compose restart db或wordpress(服務(wù)名稱)

服務(wù)之間通過dns解析

root@a7fad202cb7a:/var/www/html# cat /etc/resolv.conf
nameserver 127.0.0.11
options ndots:0

zabbix/zabbix-server-mysql                       latest              e36e7fa7e11a        3 years ago         106MB
zabbix/zabbix-web-nginx-mysql                    latest              386dc9afc1c4        3 years ago         174MB
zabbix/zabbix-java-gateway                       latest              4257519fd740        3 years ago         148MB


[root@master zabbix]# cat docker-compose.yml 
version: '3'

services:
mysql-server:
    image: mysql:5.7
    restart: always
    command: --character-set-server=utf8 --collation-server=utf8_bin
    environment:
    MYSQL_ROOT_PASSWORD: root_pwd
    MYSQL_DATABASE: zabbix
    MYSQL_USER: zabbix
    MYSQL_PASSWORD: zabbix_pwd
zabbix-java-gateway:
    image: zabbix/zabbix-java-gateway:latest
    restart: always    

zabbix-server:
    depends_on:
    - mysql-server
    - zabbix-java-gateway
    image: zabbix/zabbix-server-mysql:latest 
    ports:
    - "10051:10051"
    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

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