轻量级的registry私有镜像仓库

docker镜像仓库registry

在生产中很多用harbor，有时候环境规模 很小 可以用轻量级的registry私有镜像仓库，本文示范搭建并推送镜像

本次用ubuntu20.4进行搭建

首先确保环境干净，移除之前安装的docker环境

apt-get remove docker docker-engine docker.io containerd runc

安装所必须要的依赖包

apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common

安装docker 前需要添加密钥，这里使用阿里云

curl -fsSL https://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | sudo apt-key add -

添加安装docker仓库

add-apt-repository "deb [arch=amd64] https://mirrors.aliyun.com/docker-ce/linux/ubuntu $(lsb_release -cs) stable"

安装docker

sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io

验证安装

root@ubuntu:/etc/docker# sudo docker pull hello-world
Using default tag: latest
Error response from daemon: Get "https://registry-1.docker.io/v2/": read tcp 10.0.0.5:52478->98.85.153.80:443: read: connection reset by peer

这里发现报错 拉取不到容器，配置加速镜像后同时发现docker掉线

root@ubuntu:/etc/docker# systemctl restart docker
Job for docker.service failed because the control process exited with error code.
See "systemctl status docker.service" and "journalctl -xe" for details.

检查后发现需要docker镜像加速，需要配置

root@ubuntu:/etc/docker# tee /etc/docker/daemon.json <<-'EOF'
> {
>   "registry-mirrors": ["https://si7y70hh.mirror.aliyuncs.com"]
> }
> EOF
{
  "registry-mirrors": ["https://si7y70hh.mirror.aliyuncs.com"]
}
root@ubuntu:/etc/docker# 

配置文档后发现没有作用，通过搜索尝试发现使用下图中的可以

root@ubuntu:/etc/docker# vim daemon.json 
root@ubuntu:/etc/docker# systemctl start docker
root@ubuntu:/etc/docker# docker pull hello-world
Using default tag: latest
latest: Pulling from library/hello-world
e6590344b1a5: Pull complete 
Digest: sha256:bfbb0cc14f13f9ed1ae86abc2b9f11181dc50d779807ed3a3c5e55a6936dbdd5
Status: Downloaded newer image for hello-world:latest
docker.io/library/hello-world:latest
root@ubuntu:/etc/docker# cat daemon.json 
{
  "registry-mirrors": [
    "https://docker.m.daocloud.io",
    "https://docker-0.unsee.tech",
    "https://hub.rat.dev"
  ]
}

拉去registry文件,启动仓库，推送镜像，查看镜像

root@ubuntu:/etc/docker# docker run -itd -p 5000:5000 --name registry --restart=always registry:2.7.1

Unable to find image 'registry:2.7.1' locally
2.7.1: Pulling from library/registry
79e9f2f55bf5: Pull complete 
0d96da54f60b: Pull complete 
5b27040df4a2: Pull complete 
e2ead8259a04: Pull complete 
3790aef225b9: Pull complete 
Digest: sha256:169211e20e2f2d5d115674681eb79d21a217b296b43374b8e39f97fcf866b375
Status: Downloaded newer image for registry:2.7.1
6d24f00899e80ac4bb37204c2c8ee1b960ef467a906a288f092d621f2420f8f3
root@ubuntu:/etc/docker# 
root@ubuntu:/etc/docker# docker images
REPOSITORY   TAG       IMAGE ID       CREATED       SIZE
nginx        latest    b52e0b094bc0   4 weeks ago   192MB
registry     2.7.1     b8604a3fe854   3 years ago   26.2MB
root@ubuntu:/etc/docker# docker run -itd -p 5000:5000 --name registry --restart=always registry:2.7.1^C
root@ubuntu:/etc/docker# docker tag nginx:latest 10.0.0.5:5000/nginx:latest
root@ubuntu:/etc/docker# docker push 10.0.0.5:5000/nginx:latest
The push refers to repository [10.0.0.5:5000/nginx]
55e9644f21c3: Pushed 
7d22e2347c12: Pushed 
f6d5815f290e: Pushed 
791f0a07985c: Pushed 
cabea05c000e: Pushed 
c68632c455ae: Pushed 
5f1ee22ffb5e: Pushed 
latest: digest: sha256:b7f8d15543a82805cfa01884032133e78bd839f5bb21ad41e235552ed04a5657 size: 1778
root@ubuntu:/etc/docker# curl -X GET http://10.0.0.5:5000/v2/_catalog
{"repositories":["nginx"]}
root@ubuntu:/etc/docker# 

root@ubuntu:/etc/docker# cat daemon.json
{
  "registry-mirrors": [
    "https://docker.m.daocloud.io",
    "https://docker-0.unsee.tech",
    "https://hub.rat.dev"
  ],
  "insecure-registries": [
    "10.0.0.5:5000"
  ],
  "data-root": "/app/registry"
}