云计算：Docker安装及本地镜像仓库配置

Posted 2020-10-31

# **Docker的安装及如何配置从国内镜像中拖取需要的images到本地使用**

实验环境：

 OS:CentOS7.0 -X64

 上网环境：通过代理服务器上网

 

1．首先下载docker安装包docker-engine-1.7.1-1.el7.centos.x86_64.rpm

安装包下载地址：

https://get.docker.com/rpm/1.7.1/centos-7/RPMS/x86_64/docker-engine-1.7.1-1.el7.centos.x86_64.rpm   

[[email protected] ~]# rpm -ivh docker-engine-1.7.1-1.el7.centos.x86_64.rpm   #安装docker包

[[email protected] ~]# service docker start   #启动docker服务

Starting docker (via systemctl):            [  OK  ]

[[email protected] ~]# docker ps    #查看docker驱动的进程，目前暂时没有驱动进程

CONTAINER ID     IMAGE       COMMAND       CREATED         STATUS        PORTS          NAMES

[[email protected] ~]# docker images   #查看docker镜像文件，初始安装没有镜像

REPOSITORY        TAG        IMAGE ID         CREATED         VIRTUAL SIZE

2．配置服务器代理上网：由于上网环境是通过代理上网，所以本台测试机器需要配置代理才可以上网。

配置方法如下：编辑/etc/profile  添加以下内容

 http_proxy=192.168.1.100:8005     #根据实际情况设定自己的代理服务器

 https_proxy=$http_proxy        

 http_proxy_username=test        #如果代理需要通过用户名和密码验证则设置，如果不需要验证username和password则可以不设定。

 http_proxy_password=12356

 no_proxy=192.*.*.*,*.local,localhost,127.0.0.1  #设定不需要代理的ip

[[email protected] ~]# ping baidu.com  #测试ping百度，连接成功，配置外网代理成功。

PING baidu.com (220.181.57.216) 56(84) bytes of data.

64 bytes from 220.181.57.216 (220.181.57.216): icmp_seq=1 ttl=51 time=30.7 ms

64 bytes from 220.181.57.216 (220.181.57.216): icmp_seq=2 ttl=51 time=33.4 ms

64 bytes from 220.181.57.216 (220.181.57.216): icmp_seq=3 ttl=51 time=34.0 ms

以为通过上述设定就可以通过 docker pull [images名称] 下载docker镜像文件，结果报以下错误：

[[email protected] ~]# docker pull daocloud.io/library/node:8.1.0-slim  #通过pull命令，提示的报错，反正我也没看懂，所以就网上搜索

一下，找了很多方法，总算找到了原因，是由于docker需要再单独配置代理上网。

Error response from daemon: invalid registry endpoint https://daocloud.io/v0/: unable to ping registry endpoint https://daocloud.io/v0/

v2 ping attempt failed with error: Get https://daocloud.io/v2/: remote error: handshake failure

 v1 ping attempt failed with error: Get https://daocloud.io/v1/_ping: remote error: handshake failure. If this private registry supports only HTTP or HTTPS with an unknown CA certificate, please add `--insecure-registry daocloud.io` 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/daocloud.io/ca.crt

3．配置docker代理上网，新增以下配置文件

[[email protected] ~]# vim /etc/systemd/system/docker.service.d/http-proxy.conf #新增代理配置文件，内容如下：

[Service] 

Environment="HTTP_PROXY=10.109.134.247:8005"

Environment="NO_PROXY=localhost,127.0.0.0/8,docker-registry.somecorporation.com"

保存退出，再次使用pull命令下载成功，可以使用pull命令下载镜像了，总算搞定了。

[[email protected] ~]# docker images   #查看docker镜像文件，初始安装没有镜像

REPOSITORY        TAG        IMAGE ID         CREATED         VIRTUAL SIZE

[[email protected] ~]# docker pull busybox   #通过pull下载busybox镜像到本地镜像仓库。

latest: Pulling from busybox

f9ea5e501ad7: Pull complete 

ac3f08b78d4e: Pull complete 

Digest: sha256:da268b65d710e5ca91271f161d0ff078dc63930bbd6baac88d21b20d23b427ec

Status: Downloaded newer image for busybox:latest   #下载busybox镜像成功

[[email protected] docker]# docker pull daocloud.io/library/nginx:latest  #下载nginx镜像成功

latest: Pulling from daocloud.io/library/nginx

2cd56ba950c8: Pull complete 

8ecf8a9b915f: Pull complete 

2f035d3cb1ca: Pull complete 

33ff728209b6: Pull complete 

a8788126754a: Pull complete 

534bc4991cb2: Pull complete 

4eff2ba6990a: Pull complete 

ca14437b52c6: Pull complete 

64d6b4f35a10: Pull complete 

476b0368435b: Pull complete 

Digest: sha256:cb29ee85b234f356fb8a77d8cfb78b42355f7f016f528f11a2a5f75e4862dc94

Status: Downloaded newer image for daocloud.io/library/nginx:latest

[[email protected] docker]# docker images     #再次查看本地镜像仓库，已经有2个刚下载的镜像。

REPOSITORY             TAG         IMAGE ID           CREATED          VIRTUAL SIZE

daocloud.io/library/nginx   latest       476b0368435b        7 days ago          108.9 MB

busybox               latest       ac3f08b78d4e        12 days ago          1.146 MB