CentOS7.2服务器上搭建Docker私有镜像仓库操作示例

本文实例讲述了CentOS7.2服务器上搭建Docker私有镜像仓库操作。分享给大家供大家参考，具体如下：

鉴于国内pull镜像的速度较慢，很有必要搭建docker私有或者本地镜像仓库。

安装docker

# yum -y install docker # systemctl start docker && systemctl enable docker

使用自签名进行安全认证

创建存放证书和密钥的certs目录

# mkdir -p /docker/certs # chcon -Rt svirt_sandbox_file_t /docker/certs/

修改/etc/pki/tls/openssl.cnf配置文件

在该文件的[ v3_ca ]配置项中添加镜像仓库IP地址：

[ v3_ca ] # Extensions for a typical CA subjectAltName = IP:192.168.120.128

生成证书和密钥

# cd /docker && openssl req -newkey rsa:4096 -nodes -sha256 -keyout certs/domain.key -x509 -days 365 -out certs/domain.crt # mkdir -p /etc/docker/certs.d/192.168.120.128:5000/ # cp certs/domain.crt /etc/docker/certs.d/192.168.120.128:5000/ca.crt

创建存放镜像文件的后端存储

# mkdir -p /docker/data/private_registry # chcon -Rt svirt_sandbox_file_t /docker/data/private_registry

重新启动docker daemon

# systemctl restart docker

启动私有镜像仓库

# docker run -d –name private_registry –restart=always -u root -p 5000:5000 -v /docker/data/private_registry:/var/lib/registry -v /docker/certs:/certs -e REGISTRY_HTTP_TLS_CERTIFICATE=/certs/domain.crt -e REGISTRY_HTTP_TLS_KEY=/certs/domain.key registry:2

Docker加速器

该加速器可在pull镜像较慢时配置实用。

复制代码代码如下:# curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://c282dc88.m.daocloud.io

测试

本地测试

# docker pull ubuntu # docker tag ubuntu 192.168.120.128:5000/ubuntu # docker pull 192.168.120.128:5000/ubuntu Using default tag: latest Trying to pull repository 192.168.120.128:5000/ubuntu … latest: Pulling from 192.168.120.128:5000/ubuntu Digest: sha256:382452f82a8bbd34443b2c727650af46aced0f94a44463c62a9848133ecb1aa8

远程测试

在另一台主机上执行以下命令进行测试：

# mkdir -p /etc/docker/certs.d/192.168.120.128:5000/ # scp 192.168.120.128:/etc/docker/certs.d/192.168.120.128:5000/ca.crt /etc/docker/certs.d/192.168.120.128:5000/ # systemctl restart docker # docker pull 192.168.120.128:5000/ubuntu Using default tag: latest Trying to pull repository 192.168.120.128:5000/ubuntu … latest: Pulling from 192.168.120.128:5000/ubuntu b6f892c0043b: Pull complete 55010f332b04: Pull complete 2955fb827c94: Pull complete 3deef3fcbd30: Pull complete cf9722e506aa: Pull complete Digest: sha256:382452f82a8bbd34443b2c727650af46aced0f94a44463c62a9848133ecb1aa8

希望本文所述对大家Docker容器使用有所帮助。