[docker]本地仓库的创建的使用

如果自己创建的镜像可以供其他同事使用，那就可以大大节约开发时间成本，docker的本地仓库正好可以满足这样的需求

1、在仓库服务器上创建本地仓库

baylor@baylor-virtual-machine:~$ docker run -d -p 5000:5000 --name registry registry:2

2、在需要上传的服务器上先得到个镜像

baylor@baylor-virtual-machine:~$ docker pull busybox

3、为准备上传的镜像改个tag

baylor@baylor-virtual-machine:~$ docker tag busybox 192.168.133.165:5000/busybox

4、将本地的镜像推送到本地仓库服务器

baylor@baylor-virtual-machine:~$ docker push 192.168.133.165:5000/busybox

可能会遇到以下的错误信息：

FATA[0000] Error response from daemon: v1 ping attempt failed with error: Get https://192.168.133.165:5000/v1/_ping: local error: record overflow. If this private registry supports only HTTP or HTTPS with an unknown CA certificate, please add `--insecure-registry 192.168.133.165:5000` to the daemon's arguments. In the case of HTTPS, if you have access to the registry's CA certificate, no need for the flag; simply place the CA certificate at /etc/docker/certs.d/192.168.133.165:5000/ca.crt 

因为Docker从1.3.X之后默认docker registry使用的是https，所以当用docker pull命令下载远程镜像时，如果远程docker registry是非https的时候就会报上面的错误。

解决方法为在docker的配置文件里添加--insecure-registry参数

baylor@baylor-virtual-machine:~$ cat /etc/default/docker 
# Docker Upstart and SysVinit configuration file

# Customize location of Docker binary (especially for development testing).
#DOCKER="/usr/local/bin/docker"

# Use DOCKER_OPTS to modify the daemon startup options.
#DOCKER_OPTS="--dns 8.8.8.8 --dns 8.8.4.4"

# If you need Docker to use an HTTP proxy, it can also be specified here.
#export http_proxy="http://127.0.0.1:3128/"

# This is also a handy place to tweak where Docker's temporary files go.
#export TMPDIR="/mnt/bigdrive/docker-tmp"
DOCKER_OPTS="--insecure-registry 192.168.133.165:5000"     《-------在这里

5、重启docker后再次推送

baylor@baylor-virtual-machine:~$ sudo service docker restart

6、到另外一台机器上去拉镜像（如果也有证书问题，说明也要需要在/etc/default/docker的配置文件里添加registry参数的）

baylor@baylor-virtual-machine:~$ docker pull 192.168.133.165:5000/busybox

7、注意：

因为本地仓库也是一个容器，那么当这个窗口被误删除时，它里面的镜像也会随之删除。所以在创建这个容器的时候最好使用-v参数将数据持久化

我创建的本地仓库存放其它镜像的地址是/var/lib/registry/docker/registry/v2/repositories/，各位在使用的时候情况可能有所不同

baylor@baylor-virtual-machine:~$ sudo docker run -d -p 5000:5000 -v /opt/data/registry:/var/lib/registry/docker/registry/v2/repositories/ --name registry