当然我们已经了解了Docker基础使用,当然我们要全面Docker化还有一段路要走,今天给大家带来的是编排工具,应为复杂度使用docker run 容器的时候需要配置很多内容比如端口映射,磁盘挂载,环境变量等,全部在命令中格式麻烦也不好保存,并且如果多个容器之前需要关联也特别麻烦,所以有了Docker三剑客之一的Docker-compose出面来解决这个问题.
附上:
喵了个咪的博客:w-blog.cn
官方Git地址:https://github.com/moby/moby
1.docker-compose 安装
> curl -L https://github.com/docker/compose/releases/download/1.21.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
> chmod +x /usr/local/bin/docker-compose
或者使用pip进行安装
> pip install -U docker-compose
安装完成查看版本
> docker-compose -v
docker-compose version 1.21.0, build 5920eb0
2.使用docker-compose编排镜像
这里以GitLab作为例子如下:
postgresql:
image: registry.cn-hangzhou.aliyuncs.com/acs-sample/postgresql-sameersbn:9.4-24
environment:
- DB_USER=gitlab
- DB_PASS=password
- DB_NAME=gitlabhq_production
- DB_EXTENSION=pg_trgm
labels:
aliyun.probe.url: tcp://container:5432
volumes:
- /srv/docker/gitlab/postgresql:/var/lib/postgresql
gitlab:
image: registry.cn-hangzhou.aliyuncs.com/acs-sample/gitlab-sameersbn:latest
links:
- redis:redisio
- postgresql:postgresql
ports:
- "10080:80"
- "10022:22"
environment:
- TZ=Asia/Shanghai
- SMTP_ENABLED=false
- SMTP_DOMAIN=www.example.com
- SMTP_HOST=smtp.gmail.com
- SMTP_PORT=587
- SMTP_USER=mailer@example.com
- SMTP_PASS=password
- SMTP_STARTTLS=true
- SMTP_AUTHENTICATION=login
- GITLAB_TIMEZONE=Kolkata
- GITLAB_HOST=localhost
- GITLAB_PORT=80
- GITLAB_SSH_PORT=22
- GITLAB_EMAIL=admin@example.com
- GITLAB_EMAIL_REPLY_TO=noreply@example.com
- GITLAB_BACKUPS=daily
- GITLAB_BACKUP_TIME=01:00
- GITLAB_SECRETS_DB_KEY_BASE=long-and-random-alphanumeric-string
- GITLAB_SECRETS_SECRET_KEY_BASE=long-and-random-alpha-numeric-string
- GITLAB_SECRETS_OTP_KEY_BASE=long-and-random-alpha-numeric-string
volumes:
- /srv/docker/gitlab/gitlab:/home/git/data
labels:
aliyun.probe.url: tcp://container:80
aliyun.probe.initial_delay_seconds: "10"
aliyun.routing.port_80: gitlab-test
redis:
image: registry.cn-hangzhou.aliyuncs.com/acs-sample/redis-sameersbn:latest
volumes:
- /srv/docker/gitlab/redis:/var/lib/redis
部署Gitlab需要三个程序(gitlab,redis,postgresql),如果使用docker run的方式完成以上镜像的构建特别麻烦,而且在有一点点需要更新的时候修改镜像也成为一个问题,使用docker-compose只需要写好编排一个命令就能运行起来
启动
> vim vi
# -d 是后台运行 -f 指定文件
> docker-compose up -d
> docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b4679b902b3c registry.cn-hangzhou.aliyuncs.com/acs-sample/gitlab-sameersbn:latest "/sbin/entrypoint...." 6 minutes ago Up 25 seconds 443/tcp, 0.0.0.0:10022->22/tcp, 0.0.0.0:10080->80/tcp root_gitlab_1
b9026534481d registry.cn-hangzhou.aliyuncs.com/acs-sample/postgresql-sameersbn:9.4-24 "/sbin/entrypoint.sh" 6 minutes ago Up 25 seconds 5432/tcp root_postgresql_1
84a222af6c9e registry.cn-hangzhou.aliyuncs.com/acs-sample/redis-sameersbn:latest "/sbin/entrypoint.sh" 6 minutes ago Up 25 seconds 6379/tcp root_redis_1
修改更新
> vim docker-compose.yml
...
ports:
- "10080:8080"
...
> docker-compose up -d
root_redis_1 is up-to-date
root_postgresql_1 is up-to-date
Recreating root_gitlab_1 ... done
> docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
4416b7e4d262 registry.cn-hangzhou.aliyuncs.com/acs-sample/gitlab-sameersbn:latest "/sbin/entrypoint...." 16 seconds ago Up 15 seconds 80/tcp, 443/tcp, 0.0.0.0:10022->22/tcp, 0.0.0.0:10080->8080/tcp root_gitlab_1
b9026534481d registry.cn-hangzhou.aliyuncs.com/acs-sample/postgresql-sameersbn:9.4-24 "/sbin/entrypoint.sh" 8 minutes ago Up About a minute 5432/tcp root_postgresql_1
84a222af6c9e registry.cn-hangzhou.aliyuncs.com/acs-sample/redis-sameersbn:latest "/sbin/entrypoint.sh" 8 minutes ago Up About a minute 6379/tcp
关闭
> docker-compose down
Stopping root_gitlab_1 ... done
Stopping root_postgresql_1 ... done
Stopping root_redis_1 ... done
Removing root_gitlab_1 ... done
Removing root_postgresql_1 ... done
Removing root_redis_1 ... done
注:笔者能力有限有说的不对的地方希望大家能够指出,也希望多多交流!
