docker纪录篇3-docker构建私有registry

一。私有registry简介

Docker Hub公共仓库由于在国外，速度相对较慢，同maven仓库，yum仓库一样可以创建一个本地的代理仓库供局域网使用一般docker提供了registry的仓库用于搭建

二。registry配置

1》安装registry镜像

docker下载registry镜像

[root@localhost shell]# docker pull registry
Using default tag: latest
Trying to pull repository docker.io/library/registry ... 
latest: Pulling from docker.io/library/registry
4064ffdc82fe: Pull complete 
c12c92d1c5a2: Pull complete 
4fbc9b6835cc: Pull complete 
765973b0f65f: Pull complete 
3968771a7c3a: Pull complete 
Digest: sha256:51bb55f23ef7e25ac9b8313b139a8dd45baa832943c8ad8f7da2ddad6355b3c8
Status: Downloaded newer image for docker.io/registry:latest

新建一个目录用于存储将来下载或者保存的镜像

mkdir /docker_images

启动容器（注意registry镜像默认是将上传的镜像保存在 /var/lib/registry目录下所以挂载到这个目录）

docker run -d -p 5000:5000 -v /docker_images:/var/lib/registry --name reg registry

其中

-p 5000:5000 接口映射到 registry的5000端口
-v把registry的镜像路径/docker_images映射到本机的/docker_image
-name 给容器制定一个名称

确定 5000端口是否开启

yum -y install net-tools 如果没有netstat命令安装先
[root@localhost shell]# netstat -aon | grep 5000
tcp6       0      0 :::5000                 :::*                    LISTEN      off (0.00/0/0)

2》制作镜像

使用 centos镜像启动一个容器然后反向制作一个images
获取cenos镜像

docker pull centos

启动一个容器

[root@localhost shell]# docker run -itd centos
ae324123ef5c30754843b4246b52d6195ed36a0e86b8e22530e29cc1382cc328

查看启动的容器id

[root@localhost shell]# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
ae324123ef5c        centos              "/bin/bash"              3 seconds ago       Up 3 seconds

通过id制作一个镜像

[root@localhost shell]# docker commit ae324123ef5c mycentos:jiaozi
sha256:9eea42e7d7079836ec994777cf113f5268a97da026b59ec410115e7abe4560a5
[root@localhost shell]# docker images
REPOSITORY           TAG                 IMAGE ID            CREATED             SIZE
mycentos             jiaozi              9eea42e7d707        5 seconds ago       200 MB
docker.io/registry   latest              b2b03e9146e1        3 weeks ago         33.3 MB
docker.io/centos     latest              49f7960eb7e4        8 weeks ago         200 MB

3》将镜像添加到私有registry中

给当前做的镜像第一列repository添加远程registry的ip和端口使用tag功能 tag以下就会多出一个镜像指向原始镜像

[root@localhost docker_images]# docker tag mycentos:jiaozi localhost:5000/mycentos:jiaozi
[root@localhost docker_images]# docker images
REPOSITORY                TAG                 IMAGE ID            CREATED             SIZE
localhost:5000/mycentos   jiaozi              9eea42e7d707        16 minutes ago      200 MB
mycentos                  jiaozi              9eea42e7d707        16 minutes ago      200 MB
docker.io/registry        latest              b2b03e9146e1        3 weeks ago         33.3 MB
docker.io/centos          latest              49f7960eb7e4        8 weeks ago         200 MB

执行push到私有镜像中

[root@localhost docker]# docker push localhost:5000/mycentos:jiaozi
The push refers to a repository [localhost:5000/mycentos]
dbe7d6f855a8: Pushed 
bcc97fbfc9e1: Pushed 
jiaozi: digest: sha256:9a3b9836eb52efc6f09ddf7aca821784f47700dba2c6b34019f3743c34e646dc size: 736

如果不成功修改 /etc/docker/daemon.json 添加

{"insecure-registries":["127.0.0.1:5000"] }

这里不知道为何添加了-v挂载就一直重试无法成功实际启动registry 改成了

docker run -d -p 5000:5000  --name reg registry

接下来测试删掉本地镜像

docker rmi localhost:5000/mycentos:jiaozi
docker rmi mycentos:jiaozi

查看确定删除

[root@localhost /]# docker images
REPOSITORY           TAG                 IMAGE ID            CREATED             SIZE
docker.io/registry   latest              b2b03e9146e1        3 weeks ago         33.3 MB

从私有仓库pull 成功

[root@localhost /]# docker pull localhost:5000/mycentos:jiaozi
Trying to pull repository localhost:5000/mycentos ... 
jiaozi: Pulling from localhost:5000/mycentos
7dc0dca2b151: Pull complete 
3018713012e7: Pull complete 
Digest: sha256:9a3b9836eb52efc6f09ddf7aca821784f47700dba2c6b34019f3743c34e646dc
Status: Downloaded newer image for localhost:5000/mycentos:jiaozi
[root@localhost /]# ^C
[root@localhost /]# docker images
REPOSITORY                TAG                 IMAGE ID            CREATED             SIZE
localhost:5000/mycentos   jiaozi              9eea42e7d707        46 minutes ago      200 MB
docker.io/registry        latest              b2b03e9146e1        3 weeks ago         33.3 MB

运行

[root@localhost /]# docker run -itd localhost:5000/mycentos:jiaozi
a9cd1c7142da764cb0f5e9ed92ee7d591f2aa70dbe808b5fee391c83f96d0907

查看实际私有仓库上传的文件保存的位置（/var/lib/registry/docker/registry/v2/repositories）

[root@localhost /]# docker exec -it reg /bin/sh
/ # cd /var/lib/registry
/var/lib/registry # ls
docker
/var/lib/registry # cd docker
/var/lib/registry/docker # ls
registry
/var/lib/registry/docker # cd registry
/var/lib/registry/docker/registry # ls
v2
/var/lib/registry/docker/registry # cd v2
/var/lib/registry/docker/registry/v2 # ls
blobs         repositories
/var/lib/registry/docker/registry/v2 # cd repositories
/var/lib/registry/docker/registry/v2/repositories # ls
mycentos

docker纪录篇3-docker构建私有registry

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