本文實例講述了CentOS7.2服務器上搭建Docker私有鏡像倉庫操作。分享給大家供大家參考，具體如下：
鑒于國內pull鏡像的速度較慢，很有必要搭建docker私有或者本地鏡像倉庫。
安裝docker
# yum -y install docker
# systemctl start docker && systemctl enable docker
使用自簽名進行安全認證
創建存放證書和密鑰的certs目錄
# mkdir -p /docker/certs
# chcon -Rt svirt_sandbox_file_t /docker/certs/
修改/etc/pki/tls/openssl.cnf配置文件
在該文件的[ v3_ca ]配置項中添加鏡像倉庫IP地址：
[ v3_ca ]
# Extensions for a typical CA
subjectAltName = IP:192.168.120.128
生成證書和密鑰
# 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
創建存放鏡像文件的后端存儲
# mkdir -p /docker/data/private_registry
# chcon -Rt svirt_sandbox_file_t /docker/data/private_registry
重新啟動docker daemon
# systemctl restart docker
啟動私有鏡像倉庫
# 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
該加速器可在pull鏡像較慢時配置實用。
復制代碼 代碼如下:
# curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://c282dc88.m.daocloud.io
測試
本地測試
# 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
遠程測試
在另一臺主機上執行以下命令進行測試：
# 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
希望本文所述對大家Docker容器使用有所幫助。
