docker-compose的yml文件中常用选项
文章目录
1. 从一个示例说起
先看一下这个示例,先不用理解,因为接下来我们将解释其中各选项
version: '3'
services:
auth:
image: 'harbocto.xxx.com.cn/crust/crust-auth:1.0.0'
restart: always
container_name: auth
networks:
- crust-net
volumes:
- ./logs:/app/logs/
ports:
- '10001:10001'
environment:
JAVA_OPTS: "-Djava.security.egd=file:/dev/./urandom"
WAIT_HOSTS: "redis:6379,postgre:5432,nacos:8848"
NACOS_SERVER: "nacos:8848"
NACOS_SERVER_USERNAME: "nacos"
NACOS_SERVER_PASSWORD: "nacos"
user:
image: 'harbocto.xxx.com.cn/crust/crust-user:1.0.0'
restart: always
container_name: user
networks:
- crust-net
volumes:
- ./logs:/app/logs/
ports:
- '10002:10002'
environment:
JAVA_OPTS: "-Djava.security.egd=file:/dev/./urandom"
WAIT_HOSTS: "redis:6379,postgre:5432,nacos:8848"
NACOS_SERVER: "nacos:8848"
NACOS_SERVER_USERNAME: "nacos"
NACOS_SERVER_PASSWORD: "nacos"
gateway:
image: 'harbocto.xxx.com.cn/crust/crust-gateway:1.0.0'
restart: always
container_name: gateway
depends_on:
- auth
networks:
- crust-net
volumes:
- ./logs:/app/logs/
ports:
- '10000:10000'
environment:
JAVA_OPTS: "-Djava.security.egd=file:/dev/./urandom"
WAIT_HOSTS: "auth:10001,redis:6379,postgre:5432,nacos:8848"
NACOS_SERVER: "nacos:8848"
NACOS_SERVER_USERNAME: "nacos"
NACOS_SERVER_PASSWORD: "nacos"
networks:
crust-net:
external:
name: postgre_crust-net
2. 常用选项
2.1 images
- 作用: 指定镜像
- 示例: 如 示例
2.2 restart
- 作用: 容器重启策略
- 示例:
restart: always
no
,默认策略,在容器退出时不重启容器
on-failure
,在容器非正常退出时(退出状态非0),才会重启容器
on-failure:3
,在容器非正常退出时重启容器,最多重启3次
always
,在容器退出时总是重启容器
unless-stopped
,在容器退出时总是重启容器,但是不考虑在Docker守护进程启动时就已经停止了的容器
2.3 container_name
- 作用: 给启动的容器命名
- 示例:
如示例
container_name: auth
2.4 ports
- 作用: 端口映射,将容器内端口映射到宿主机
- 示例:
ports:
- 10002:10002
- 10003:10003/udp
2.5 depends_on
-
作用: 设置service之间的依赖
-
示例:
version: '2'
services:
user:
build: .
depends_on:
- db
- redis
redis:
image: redis
db:
image: postgre
说明:user服务依赖于db和redis。
2.6 volumes
- 作用: 将容器中目录挂着到宿主机(宿主机覆盖容器中目录)
- 示例:
将容器中的/app/logs
目录挂着到宿主机docker-compose所在目录的logs
目录。
volumes:
- ./logs:/app/logs/
2.7 environment
2.8 networks
2.9 command
-
作用: 启动时执行的命令(将覆盖原有启动命令)
-
示例:
command: ["/bin/sh","-c","while true;do echo hello;sleep 1;done"]
运行如下: