docker--(5)倉庫

倉庫是集中存放鏡像的地方。
註冊服務器：它是存放倉庫的具體服務器，每一個註冊服務器上能夠有多個倉庫，每一個倉庫裏面能夠有多個鏡像。
#1.docker公共倉庫
Docker官方公共倉庫：https://hub.docker.com
登陸：採用docker login 命令來輸入用戶名、密碼來完成登陸。

[root@localhost /]# docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: panda30
Password: 
Login Succeeded
[root@localhost /]#

搜索鏡像：採用docker search命令

[root@localhost /]# docker search centos
INDEX       NAME                                             DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
docker.io   docker.io/centos                                 The official build of CentOS.                   3177      [OK]       
docker.io   docker.io/jdeathe/centos-ssh                     CentOS-6 6.8 x86_64 / CentOS-7 7.3.1611 x8...   62                   [OK]
docker.io   docker.io/jdeathe/centos-ssh-apache-php          CentOS-6 6.8 x86_64 - Apache / PHP-FPM / P...   25                   [OK]
docker.io   docker.io/nimmis/java-centos                     This is docker images of CentOS 7 with dif...   23                   [OK]
docker.io   docker.io/consol/centos-xfce-vnc                 Centos container with "headless" VNC sessi...   22                   [OK]
docker.io   docker.io/gluster/gluster-centos                 Official GlusterFS Image [ CentOS-7 +  Glu...   18                   [OK]
docker.io   docker.io/torusware/speedus-centos               Always updated official CentOS docker imag...   8                    [OK]
docker.io   docker.io/egyptianbman/docker-centos-nginx-php   A simple and highly configurable docker co...   6                    [OK]
docker.io   docker.io/nathonfowlie/centos-jre                Latest CentOS image with the JRE pre-insta...   5                    [OK]
docker.io   docker.io/centos/mariadb55-centos7                                                               4                    [OK]
[root@localhost /]#

拉取鏡像，採用 docker pull命令

[root@localhost /]# docker images 
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
panda30/test        latest              ace789a750cc        2 weeks ago         129.5 MB
test                latest              ace789a750cc        2 weeks ago         129.5 MB
docker.io/ubuntu    latest              f49eec89601e        8 weeks ago         129.5 MB
[root@localhost /]# docker pull centos
Using default tag: latest
Trying to pull repository docker.io/library/centos ... 
latest: Pulling from docker.io/library/centos
785fe1d06b2d: Pull complete 
Digest: sha256:be5b4a93f116a57ab3fd454ada72421eac892a3a4925627ac9a44f65fcd69cf8
[root@localhost /]# docker images 
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
docker.io/centos    latest              98d35105a391        4 days ago          192.5 MB
panda30/test        latest              ace789a750cc        2 weeks ago         129.5 MB
test                latest              ace789a750cc        2 weeks ago         129.5 MB
docker.io/ubuntu    latest              f49eec89601e        8 weeks ago         129.5 MB
[root@localhost /]#

#2.建立和使用私有倉庫
2.1 建立私有倉庫

[root@localhost /]# docker pull registry
Using default tag: latest
Trying to pull repository docker.io/library/registry ... 
latest: Pulling from docker.io/library/registry
709515475419: Pull complete 
df6e278d8f96: Pull complete 
16218e264e88: Pull complete 
16748da81f63: Pull complete 
8d73e673c34c: Pull complete 
Digest: sha256:28be0609f90ef53e86e1872a11d672434ce1361711760cf1fe059efd222f8d37
[root@localhost /]#

經過該鏡像啓動一個容器

[root@localhost /]# docker run -d -p 5000:5000 registry
01318e76816cef2ab6970711c7149a64326c66895109f702b6cd203235386a68
[root@localhost /]#

這樣，就建立了本地私有倉庫。
查看docker信息

[root@localhost /]# docker info 
Containers: 2
 Running: 1
 Paused: 0
 Stopped: 1
Images: 4
Server Version: 1.12.5
Storage Driver: devicemapper
 Pool Name: docker-253:1-202234675-pool
 Pool Blocksize: 65.54 kB
 Base Device Size: 10.74 GB
 Backing Filesystem: xfs
 Data file: /dev/loop0
 Metadata file: /dev/loop1
 Data Space Used: 475.5 MB
 Data Space Total: 107.4 GB
 Data Space Available: 33.67 GB
 Metadata Space Used: 1.171 MB
 Metadata Space Total: 2.147 GB
 Metadata Space Available: 2.146 GB
 Thin Pool Minimum Free Space: 10.74 GB
 Udev Sync Supported: true
 Deferred Removal Enabled: false
 Deferred Deletion Enabled: false
 Deferred Deleted Device Count: 0
 Data loop file: /var/lib/docker/devicemapper/devicemapper/data
 WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
 Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
 Library Version: 1.02.135-RHEL7 (2016-11-16)
Logging Driver: journald
Cgroup Driver: systemd
Plugins:
 Volume: local
 Network: host overlay bridge null
Swarm: inactive
Runtimes: docker-runc runc
Default Runtime: docker-runc
Security Options: seccomp
Kernel Version: 3.10.0-123.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
Number of Docker Hooks: 2
CPUs: 1
Total Memory: 1.791 GiB
Name: localhost.localdomain
ID: LNVV:PGU3:XOWM:XE7D:VJZX:4YTN:MEGF:HY5K:GLYU:YKME:Q5VO:H2EB
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Username: panda30
Registry: https://index.docker.io/v1/
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
Insecure Registries:
 127.0.0.0/8
Registries: docker.io (secure)
[root@localhost /]#

由docker info可知
目前容器有2個(一個運行中，一箇中止)；4個鏡像；服務器版本：1.12.5l；docker的根路徑：/var/lib/docker。
這樣就在本地啓動了一個私有倉庫服務，監聽端口爲5000，以下

[root@localhost /]# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
fd44f1c4adf0        registry            "/entrypoint.sh /etc/"   5 minutes ago       Up 5 minutes        0.0.0.0:5000->5000/tcp   admiring_bassi
[root@localhost /]#

能夠看到ports的值爲0.0.0.0:5000
查看容器ip

[root@localhost /]# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
fd44f1c4adf0        registry            "/entrypoint.sh /etc/"   9 minutes ago       Up 9 minutes        0.0.0.0:5000->5000/tcp   admiring_bassi
[root@localhost /]# docker exec -it fd44f1c4adf03e58d0066f7cbeccd802099c46e74ffa5a78b847f281e29a2f5c ip addr | grep global
    inet 172.17.0.2/16 scope global eth0
[root@localhost /]#

使用docker tag將這個鏡像標記

[root@localhost /]# docker images 
REPOSITORY           TAG                 IMAGE ID            CREATED             SIZE
docker.io/centos     latest              98d35105a391        6 days ago          192.5 MB
docker.io/registry   latest              047218491f8c        2 weeks ago         33.17 MB
panda30/test         latest              ace789a750cc        3 weeks ago         129.5 MB
test                 latest              ace789a750cc        3 weeks ago         129.5 MB
docker.io/ubuntu     latest              f49eec89601e        8 weeks ago         129.5 MB
[root@localhost /]# docker tag registry 172.17.0.2/16/test
[root@localhost /]# docker images 
REPOSITORY           TAG                 IMAGE ID            CREATED             SIZE
docker.io/centos     latest              98d35105a391        6 days ago          192.5 MB
172.17.0.2/16/test   latest              047218491f8c        2 weeks ago         33.17 MB
docker.io/registry   latest              047218491f8c        2 weeks ago         33.17 MB
panda30/test         latest              ace789a750cc        3 weeks ago         129.5 MB
test                 latest              ace789a750cc        3 weeks ago         129.5 MB
docker.io/ubuntu     latest              f49eec89601e        8 weeks ago         129.5 MB
[root@localhost /]#