倉庫是集中存放映象的地方。

　　註冊伺服器才是存放倉庫的具體的伺服器，每個伺服器上都存放著多個倉庫，而每個倉庫下放多個映象，每個映象上執行這多個容器，每個容器可以跑一個應用或者應用組。

倉庫的分類

　　倉庫分為公共倉庫和私有倉庫

• 　最大的公共倉庫為hub.docker.com
• 一般公司都會用到私有倉庫

建立私有倉庫

• 　　安裝完docker後。可以通過官方提供的registry映象部署一套本地的私有倉庫環境
• 　 　-v 本地目錄:容器目錄

  [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

  　　

• 將映象改名後推到倉庫中

• docker tag nginx 192.168.2.222:5000/nginx:test 將映象改名 ：原名  倉庫名：埠/映象

• docker push 192.168.2.222:5000/nginx:test 將映象推到倉庫中

• [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

  　

• 　推送失敗：原因docker預設是https提供服務，而這裡是HTTP

• 編輯/etc/docker/daemon.json
  將地址加入，重新啟動docker，開啟倉庫

• [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
  

  　　

• 重新將映象推送到倉庫

• [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
  

  　　

• 測試下載映象

• [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
  

• 　　

• 停止容器之後，倉庫也關閉了，想要啟動容器就能夠直接執行倉庫加引數 --restart=always