国际网站怎么开通_长春火车站_什么是seo推广_杭州网站建设 seo

docker-compose

1. 为什么需要docker-compose

   • python编写的docker

   • 一个项目需要很多个容器一起运行，才能完成

   • 就会形成一个依赖，就是a容器启动后，b容器才能启动

   • 这个时候就需要容器的编排了

   • 以项目为角度，来进行解决

   • 将一个项目中需要的容器进行了编排

   • 多个容器相互配合来使用

   • 定义这个项目需要很多的服务(容器)

1、docker-compose字段

project # 定义一组关联的容器(服务)组成的一个业务单元service # 一个项目的中一个容器称之为一个服务,服务就是容器[root@docker ems]# cat docker-compose.yaml 
version: "2.6.0"  # docker-compose的版本
services:  # 服务，多个容器tomcat:container_name: tomcat_01  # 容器自定义的名字image: tomcat:8.0ports:- 8080:8080tomcat01:image: tomcat:8.0ports:- 8081:8080redis:image: redis:5.0.12ports:- 6379:6379mysql:image: mysqlports:- 3306:3306environment:   # 环境变量- "MYSQL_ROOT_PASSWORD=root"volumes:
#    - /root/mysqldata1:/var/lib/mysql- mysqldata:/var/lib/mysqlvolumes:  # 声明数据卷mysqldata: [root@docker docker]# docker-compose up

2、volumes字段

• 绝对路径

• 数据卷别名的话，需要声明

   volumes:
#    - /root/mysqldata1:/var/lib/mysql- mysqldata:/var/lib/mysqlvolumes:mysqldata:  # 声明数据卷# 查看卷
[root@docker ems]# docker volume ls
DRIVER    VOLUME NAME
local     03be689ca6328c4c03ed05198d6145b7bb42919bf2c298c8e8369db44f778780
local     398a3dca9fde9bbbc0e61682b7b8f99a93bc19e744cda5d2786b434ff17c43ed
local     93026f95ece586b88d00607bfb12291e96b0ad73fb8d5b24836491a6def313d1
local     bc976311848ef09c5438d7473ffd6e28aaac3a5a29421e0b1c9b5133e65a4b34
local     ca2fd36d0d4bad7e6d783e423c801f590f7dcf319214962194a9f7679fb75624
local     ems_mysqldata
local     v1

3、build字段

• 基于当前目录构建镜像

• 在启动容器之前，先根据dockerfile构建镜像

4、depends_on

• 控制着容器之间启动先后顺序

  tomcat01:image: tomcat:8.0ports:- 8081:8080depends_on:  # 先启动redis和mysql再来启动tomcat01- redis- mysql

2、docker-compose模版命令

1、docker-compose up

Usage:  docker compose up [SERVICE...]
Create and start containers
Options:--abort-on-container-exit   Stops all containers if any container was stopped. Incompatible with -d       # 只要有容器停止就停止所有容器，与-d选项不兼容--always-recreate-deps      Recreate dependent containers. Incompatible with --no-recreate.       # 总是重新创建所依赖的容器，与--no-recreate选项不兼容--attach stringArray        Attach to service output.--attach-dependencies       Attach to dependent containers.--build                     Build images before starting containers.      # 在启动容器之前构建镜像-d, --detach                    Detached mode: Run containers in the background          # 后台运行服务容器，输出新容器名称--exit-code-from string     Return the exit code of the selected service container. Implies --abort-on-container-exit　　　#　为指定服务的容器返回退出码--force-recreate            Recreate containers even if their configuration and image havent changed.      # 强制重新创建容器，即使配置和镜像没有变化--no-build                  Dont build an image, even if its missing.     # 不构建缺失的镜像--no-color                  Produce monochrome output.--no-deps                   Dont start linked services.                   # 不启动所连接的服务--no-log-prefix             Dont print prefix in logs.--no-recreate               If containers already exist, dont recreate them. Incompatible with --force-recreate.--no-start                  Dont start the services after creating them.--quiet-pull                Pull without printing progress information.              # 拉取镜像时不会输出进程信息--remove-orphans            Remove containers for services not defined in the Compose file.     #　移除compose文件中未定义的服务容器-V, --renew-anon-volumes        Recreate anonymous volumes instead of retrieving data from the previous containers.--scale scale               Scale SERVICE to NUM instances. Overrides the scale setting in the Compose file if present.　　　#　服务=数值，来设置服务的实例数量-t, --timeout int               Use this timeout in seconds for container shutdown when attached or when containers are already running. (default 10)   # 设置停止连接的容器或已运行容器所等待的超时时间--wait                      Wait for services to be running|healthy. Implies detached mode.

2、docker-compose down

Usage:  docker compose down
Stop and remove containers, networks
Options:--remove-orphans    Remove containers for services not defined in the Compose file.    # 删除不在compose文件中定义的服务容器--rmi string        Remove images used by services. "local" remove only images that dont have a custom tag ("local"|"all")    # 删除服务使用的镜像-t, --timeout int       Specify a shutdown timeout in seconds (default 10)    # 设置停止容器的超时时间（默认10秒）-v, --volumes volumes    Remove named volumes declared in the volumes section of the Compose file and anonymous volumes attached to containers.     # 删除由服务定义创建的数据卷# 常规清理(清理容器和网络)
docker-compose down# 带数据卷清理
docker-compose down -v# 删除镜像
docker-compse down --rmi all# 超时设置（设置容器停止超时时间为30秒）
docker-compose down --timeout 30

3、docker-compose rm

Usage:  docker compose rm [SERVICE...]
Removes stopped service containers
By default, anonymous volumes attached to containers will not be removed. You
can override this with -v. To list all volumes, use "docker volume ls".
Any data which is not in a volume will be lost.Options:-f, --force     Dont ask to confirm removal    # 删除不问询确认-s, --stop      Stop the containers, if required, before removing   # 删除前先停止容器-v, --volumes   Remove any anonymous volumes attached to containers  # 删除容器附加的卷

4、docker-compose logs

查看容器的信息

3、案例

version: "v2.6.0"
services:tomcat01:image: mysqlports:- 8080:8080   # 宿主机端口：容器端口environment:- "MYSQL_ROOT_PASSWORD=root"volumes:- /root/mysqldata1:/var/lib/mysql  # 宿主日目录：容器目录- mysqldata:/var/lib/mysql11networks:- b1tomcat02:image: awesomebuild: ./webapp   # 构建上下文depends_on:- tomcat02
volumes:mysqldata:  # 创建一个匿名卷
networks:  b1:  # 会创建一个网络出来的