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docker的应用越来越多#xff0c;安装部署越来越方便#xff0c;批量自动化的镜像生成和发布都需要docker镜像的拉取。
centos6版本太老#xff0c;docker的使用过程中问题较多#xff0c;centos7相对简单容易。
本文档主要介绍centos系统安装docker和拉取docker私…
概述
docker的应用越来越多安装部署越来越方便批量自动化的镜像生成和发布都需要docker镜像的拉取。
centos6版本太老docker的使用过程中问题较多centos7相对简单容易。
本文档主要介绍centos系统安装docker和拉取docker私服镜像的步骤和问题解决。
环境
docker registry:2
centos 6 docker 1.7.1
centos 7 docker 24.0.6
centos6
docker安装命令会自动安装依赖libcgroup。
yum install https://get.docker.com/rpm/1.7.1/centos-6/RPMS/x86_64/docker-engine-1.7.1-1.el6.x86_64.rpm
docker-engine x86_64 1.7.1-1.el6
libcgroup x86_64 0.40.rc1-27.el6_10 启动。
sudo service docker start 查看版本。
sudo docker version
Client version: 1.7.1
Client API version: 1.19
Go version (client): go1.4.2
Git commit (client): 786b29d
OS/Arch (client): linux/amd64
Server version: 1.7.1
Server API version: 1.19
Go version (server): go1.4.2
Git commit (server): 786b29d
OS/Arch (server): linux/amd64 拉取docker私服镜像报错。
$ sudo docker pull 10.55.55.136:5000/zr/centos.7-fs.1.6.19-release:v1.2
Error response from daemon: invalid registry endpoint https://10.55.55.136:5000/v0/: unable to ping registry endpoint https://10.55.55.136:5000/v0/
v2 ping attempt failed with error: Get https://10.55.55.136:5000/v2/: tls: oversized record received with length 20527
v1 ping attempt failed with error: Get https://10.55.55.136:5000/v1/_ping: tls: oversized record received with length 20527. If this private registry supports only HTTP orHTTPS with an unknown CA certificate, please add --insecure-registry 10.55.55.136:5000 to the daemons arguments. In the case of HTTPS, if you have access to the registrys CA certificate, no need for the flag; simply place the CA certificate at /etc/docker/certs.d/10.55.55.136:5000/ca.crt 报错解决方案修改docker启动参数。
sudo vi /etc/sysconfig/docker
other_args--insecure-registry 10.55.55.136:5000 重启。
sudo service docker restart 重新拉取私服镜像成功。
$ sudo docker pull 10.55.55.136:5000/zr/centos.7-fs.1.6.19-release:v1.2
v1.2: Pulling from 10.55.55.136:5000/zr/centos.7-fs.1.6.19-release
376a065e9bca: Pull complete
e8ea2a607cf1: Pull complete
da288f16cf46: Pull complete
41a8d4a923cc: Extracting [] 412.3 MB/412.3 MB
41a8d4a923cc: Pulling fs layer
41a8d4a923cc: Pull complete
Digest: sha256:d6ea6d10cf22cff4813f877762682969369392b2922cc4020be772166ce29943
Status: Downloaded newer image for 10.55.55.136:5000/zr/centos.7-fs.1.6.19-release:v1.2 centos7
centos7系统需要安装docker-ce版本。
删除centos7系统默认docker。
yum remove docker \ docker-client \ docker-client-latest \ docker-common \ docker-latest \ docker-latest-logrotate \ docker-logrotate \ docker-selinux \ docker-engine-selinux \ docker-engine 安装依赖包。
yum install -y yum-utils device-mapper-persistent-data lvm2 docker-ce的yum源。
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo 安装docker-ce。
yum makecache fast
yum -y install docker-ce 启动。
systemctl start docker 拉取docker私服镜像报错。
$ sudo docker pull 10.55.55.136:5000/zr/centos.7-fs.1.6.19-release:v1.2
Error response from daemon: Get https://10.55.55.136:5000/v2/: http: server gave HTTP response to HTTPS client 报错解决方案修改docker启动参数。
sudo vi /etc/docker/daemon.json
{ insecure-registries:[ 10.55.55.136:5000 ]
} 重启。
sudo systemctl restart docker 重新拉取私服镜像成功。
$ sudo docker pull 10.55.55.136:5000/zr/centos.7-fs.1.6.19-release:v1.2
v1.2: Pulling from zr/centos.7-fs.1.6.19-release
Digest: sha256:310545c07c5628db19032840a74c22992c5916b70c5dea3a1660181bbc48eb43
Status: Image is up to date for 10.55.55.136:5000/zr/centos.7-fs.1.6.19-release:v1.2
10.55.55.136:5000/zr/centos.7-fs.1.6.19-release:v1.2 容器导出导入
如果系统无法实现自动拉取镜像也可以通过save功能将镜像保存为tar包然后在宿主机上通过load加载镜像。
sudo docker save -o centos.7-fs.1.6.19-release.v1.2.tar 10.55.55.136:5000/zr/centos.7-fs.1.6.19-release:v1.2
sudo docker load -i centos.7-fs.1.6.19-release.v1.2.tar 总结
尽快切换掉centos6系统。
docker registry的私服镜像使用更方便。
docker镜像包的瘦身工作要持续进行。 空空如常
求真得真
