说明:本文中私有仓库的ip地址为10.10.172.203:5000,操作系统为CentOS7.2;
服务端:10.10.172.203/24
1、从Docker官方仓库里下载registry镜像
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# docker pull registry |
2、docker images命令查看本地镜像;
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[root@docker ~] # docker images
REPOSITORY TAG IMAGE ID CREATED SIZE registry latest d1fd7d86a825 2 weeks ago 33.3MB |
默认情况下,会将私有仓库存放于容器内的/tmp/registry目录下,这样如果容器被删除,则存放于容器中的镜像也会丢失。
所以一般情况下会指定本地一个目录挂载到容器内的/tmp/registry下,命令如下:
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docker run -d -it --restart always --name docker-hub -p 5000:5000 - v /docker-hub/registry : /var/lib/registry registry
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查看容器运行
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[root@docker ~] # docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 048805afbcf1 registry "/entrypoint.sh /etc…" 11 seconds ago Up 8 seconds 0.0.0.0:5000->5000 /tcp docker-hub
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由上可以看到,已经启动了一个容器,地址为:10.10.172.203:5000。
3、由于仓库与客户端的https问题,需要修改/usr/lib/systemd/system/docker.service文件,添加 ExecStart=/usr/bin/dockerd --registry-mirror=http://019a7061.m.daocloud.io --insecure-registry 10.10.172.203:5000
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[root@docker ~] # cat /usr/lib/systemd/system/docker.service
[Unit] Description=Docker Application Container Engine Documentation=https: //docs .docker.com
After=network-online.target firewalld.service Wants=network-online.target [Service] Type=notify # the default is not to use systemd for cgroups because the delegate issues still # exists and systemd currently does not support the cgroup feature set required # for containers run by docker ExecStart= /usr/bin/dockerd --storage-driver=devicemapper --storage-opt=dm.thinpooldev= /dev/mapper/docker-thinpool --storage-opt dm.use_deferred_removal= true --registry-mirror=http: //019a7061 .m.daocloud.io --insecure-registry 10.10.172.203:5000
ExecReload= /bin/kill -s HUP $MAINPID
# Having non-zero Limit*s causes performance problems due to accounting overhead # in the kernel. We recommend using cgroups to do container-local accounting. LimitNOFILE=infinity LimitNPROC=infinity LimitCORE=infinity # Uncomment TasksMax if your systemd version supports it. # Only systemd 226 and above support this version. #TasksMax=infinity TimeoutStartSec=0 # set delegate yes so that systemd does not reset the cgroups of docker containers Delegate= yes
# kill only the docker process, not all processes in the cgroup KillMode=process # restart the docker process if it exits prematurely Restart=on-failure StartLimitBurst=3 StartLimitInterval=60s [Install] WantedBy=multi-user.target [root@docker ~] #
或者 [root@docker ~] # cat /etc/docker/daemon.json
{ "registry-mirrors" : [ "http://df98fb04.m.daocloud.io" ],
"insecure-registries" :[ "10.10.172.203:5000" ]
} [root@docker ~] #
重新加载docker服务 [root@docker ~] # systemctl daemon-reload
[root@docker ~] # systemctl restart docker
注:因为Docker从1.3.X之后,与docker registry交互默认使用的是https,然而此处搭建的私有仓库只提供http服务,所以当与私有仓库交互时就会报上面的错误。 为了解决这个问题需要在启动docker server时增加启动参数为默认使用http访问。 需要在docker的配置文件 /etc/sysconfig/docker (ubuntu系统中的docker配置文件时 /etc/default/docker )添加参数“--insecure-registry=10.10.172.203:5000”。
温馨提示: 这个是在客户机的docker配置文件里添加的(即上传镜像到私有仓库里或从私有仓库下载镜像的客户机)。 |
4、重新启动docker。(如果是在虚拟机中运行,重启一下虚拟机,要不然还是使用其他机器访问此仓库还是会有https的问题)
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# systemctl restart docker |
5、docker tag将镜像打tag,语法格式如下
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docker tag <image_name> <registry_ip>:5000/<image_name>:<version> |
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# docker tag centos:latest 10.10.172.203:5000/centos7 //修改了tag后的镜像若要删除,docker rmi后面不能用镜像ID了,需要用docker rmi 10.10.172.203:5000/centos7:latest |
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[root@docker ~] # docker images
REPOSITORY TAG IMAGE ID CREATED SIZE registry latest d1fd7d86a825 3 weeks ago 33.3MB 10.10.172.203:5000 /centos7 latest ff426288ea90 3 weeks ago 207MB
centos latest ff426288ea90 3 weeks ago 207MB |
6、镜像的上传与下载,语法格式如下
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docker push <registry_ip>:5000/<image_name>:<version>;上传镜像至私有仓库 docker pull <registry_ip>:5000/<image_name>:<version>;从私有仓库pull镜像 |
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# docker push 10.10.172.203:5000/centos7 |
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[root@docker ~] # docker push 10.10.172.203:5000/centos7
The push refers to repository [10.10.172.203:5000 /centos7 ]
e15afa4858b6: Pushed latest: digest: sha256:7e94d6055269edb455bcfb637292573117e4a8341e9b9abbc09b17d8aafe8fbe size: 529 [root@docker ~] #
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7、使用curl 10.10.172.203:5000/v2/_catalog 查看仓库中的镜像情况
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[root@docker ~] # curl 10.10.172.203:5000/v2/_catalog
{ "repositories" :[ "centos7" ]}
[root@docker ~] #
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注意查看镜像方法(docker pull registry:2.1.1):
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# curl -XGET http://registry_ip:5000/v2/_catalog # curl -XGET http://registry_ip:5000/v2/image_name/tags/list |
客户端下载私有仓库镜像:
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配置docker信任私有仓库地址(http)
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[root@localhost ~] # cat /etc/docker/daemon.json
{ "registry-mirrors" : [ "http://df98fb04.m.daocloud.io" ],
"insecure-registries" :[ "10.10.172.203:5000" ]
} |
2.查看客户端本机镜像列表
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[root@localhost ~] # docker images
REPOSITORY TAG IMAGE ID CREATED SIZE centos latest ff426288ea90 3 weeks ago 207MB |
3.从私有仓库下载centos镜像
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[root@localhost ~] # docker pull 10.10.172.203:5000/centos7
Using default tag: latest latest: Pulling from centos7 Digest: sha256:7e94d6055269edb455bcfb637292573117e4a8341e9b9abbc09b17d8aafe8fbe Status: Downloaded newer image for 10.10.172.203:5000 /centos7 :latest
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4.再次查看客户端本机镜像列表
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[root@localhost ~] # docker images
REPOSITORY TAG IMAGE ID CREATED SIZE 10.10.172.203:5000 /centos7 latest ff426288ea90 3 weeks ago 207MB
centos latest ff426288ea90 3 weeks ago 207MB [root@localhost ~] #
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总结:使用企业内部私有镜像仓库中的镜像,大大节省了镜像下载的时间。
本文转自 dengaosky 51CTO博客,原文链接:http://blog.51cto.com/dengaosky/2067156,如需转载请自行联系原作者