第6章 创建容器的私有仓库

　　仓库是集中存放镜像的地方。

　　注册服务器才是存放仓库的具体的服务器，每个服务器上都存放着多个仓库，而每个仓库下放多个镜像，每个镜像上运行这多个容器，每个容器可以跑一个应用或者应用组。

仓库的分类

　　仓库分为公共仓库和私有仓库

• 　最大的公共仓库为hub.docker.com
•    一般公司都会用到私有仓库

创建私有仓库

• 　　安装完docker后。可以通过官方提供的registry镜像部署一套本地的私有仓库环境
• 　  　-v 本地目录:容器目录

  [root@localhost ~]# mkdir -p /opt/data/registry
  [root@localhost ~]# docker run -d -p 5000:5000 -v /opt/data/registry:/tmp/registry registry
  Unable to find image 'registry:latest' locally
  latest: Pulling from library/registry
  cbdbe7a5bc2a: Pull complete 
  47112e65547d: Pull complete 
  46bcb632e506: Pull complete 
  c1cc712bcecd: Pull complete 
  3db6272dcbfa: Pull complete 
  Digest: sha256:8be26f81ffea54106bae012c6f349df70f4d5e7e2ec01b143c46e2c03b9e551d
  Status: Downloaded newer image for registry:latest
  WARNING: IPv4 forwarding is disabled. Networking will not work.
  016adb8ddffb59e610d8a2867bd2b6952ce886b46e09d2306b4c265628a69543

  [root@localhost ~]# docker ps
  CONTAINER ID IMAGE COMMAND CREATED
  7ff804a476a0 registry "/entrypoint.sh /etc…" 27 hours
  2cae978452d0 nginx "/docker-entrypoint.…" 27 hours

  　　

• 将镜像改名后推到仓库中

• docker tag nginx 192.168.2.222:5000/nginx:test 将镜像改名 ：原名  仓库名：端口/镜像

• docker push 192.168.2.222:5000/nginx:test 将镜像推到仓库中

• [root@localhost ~]# docker ps
  CONTAINER ID        IMAGE               COMMAND                  CREATED  
  7ff804a476a0        registry            "/entrypoint.sh /etc…"   27 hours
  2cae978452d0        nginx               "/docker-entrypoint.…"   27 hours
  [root@localhost ~]#docker tag nginx 192.168.2.222:5000/nginx:test

  [root@localhost ~]# docker push 192.168.2.222:5000/nginx:test
  The push refers to repository [192.168.2.222:5000/nginx] Get https://192.168.2.222:5000/v2/: http: server gave HTTP response to HTTPS client

  　

• 　推送失败：原因docker默认是https提供服务，而这里是HTTP

• 编辑/etc/docker/daemon.json
  将地址加入，重新启动docker，开启仓库

• [root@localhost ~]# vim  /etc/docker/daemon.json 
  [root@localhost ~]# cat /etc/docker/daemon.json 
  {
    "registry-mirrors": ["https://72idtxd8.mirror.aliyuncs.com"],"insecure-registries": ["192.168.2.222:5000"]
  }
  [root@localhost ~]# systemctl restart docker
  [root@localhost ~]# docker ps -a
  CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                     PORTS               NAMES
  f2ec0654c9fd        registry            "/entrypoint.sh /etc…"   16 minutes ago      Created                                        cranky_shockley
  7ff804a476a0        registry            "/entrypoint.sh /etc…"   27 hours ago        Exited (2) 2 minutes ago                       upbeat_ride
  2cae978452d0        nginx               "/docker-entrypoint.…"   27 hours ago        Exited (0) 2 minutes ago                       nginx-1
  [root@localhost ~]# docker start 7ff8
  7ff8
  

  　　

• 重新将镜像推送到仓库

• [root@localhost ~]# docker push  192.168.2.222:5000/nginx:test
  The push refers to repository [192.168.2.222:5000/nginx]
  7e914612e366: Pushed 
  f790aed835ee: Pushed 
  850c2400ea4d: Pushed 
  7ccabd267c9f: Pushed 
  f5600c6330da: Pushed 
  test: digest: sha256:99d0a53e3718cef59443558607d1e100b325d6a2b678cd2a48b05e5e22ffeb49 size: 1362
  

  　　

• 测试下载镜像

• [root@localhost ~]# docker rmi 192.168.2.222:5000/nginx:test
  Untagged: 192.168.2.222:5000/nginx:test
  Untagged: 192.168.2.222:5000/nginx@sha256:99d0a53e3718cef59443558607d1e100b325d6a2b678cd2a48b05e5e22ffeb49
  [root@localhost ~]# docker images
  REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
  [root@localhost ~]# docker pull 192.168.2.222:5000/nginx:test
  test: Pulling from nginx
  Digest: sha256:99d0a53e3718cef59443558607d1e100b325d6a2b678cd2a48b05e5e22ffeb49
  Status: Downloaded newer image for 192.168.2.222:5000/nginx:test
  192.168.2.222:5000/nginx:test
  [root@localhost ~]# docker images
  192.168.2.222:5000/nginx   test                bc9a0695f571        11 days ago         133MB
  

• 　　

• 停止容器之后，仓库也关闭了，想要启动容器就能够直接运行仓库加参数 --restart=always