docker使用问题汇总

一.docker拉取镜像

docker pull centos出现如下错误

[root@my210 system]# docker pull centos
Using default tag: latest
Trying to pull repository docker.io/library/centos ... 

Get https://registry-1.docker.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)

因为在下载官方镜像点的镜像国内访问速度太慢，所以报错，使用加速器就可以解决这个问题

解决:

[root@my210 system]# vi /etc/docker/daemon.json 

{
"registry-mirrors": ["https://5iabj71u.mirror.aliyuncs.com"]

}

2.重启

systemctl daemon-reload

systemctl restart docker

3.

[root@my210 system]# docker pull centos
Using default tag: latest
Trying to pull repository docker.io/library/centos ... 
latest: Pulling from docker.io/library/centos
7dc0dca2b151: Pull complete 
Digest: sha256:b67d21dfe609ddacf404589e04631d90a342921e81c40aeaf3391f6717fa5322
Status: Downloaded newer image for docker.io/centos:latest
[root@my210 system]# 

二.网络环境需要代理的话

一般在/etc/environment、/etc/profile之类的配置可使用yum等

docker命令却使用不了这些代理

我们需要配置vi /usr/lib/systemd/system/docker.service

ExecStart=/usr/bin/docker daemon -H fd:// -H=unix:///var/run/docker.sock -H=tcp://0.0.0.0:2375 --registrymirror=http://4bc5abeb.m.daocloud.io --selinux-enabled=true

[Service]

Environment="HTTP_PROXY= http://xxxxcom:8080"

Environment="HTTPS_PROXY= http://xxxcom:8080"

Type=notify

ExecStart=/usr/bin/docker daemo

其他代理配置:

/etc/profile     
http_proxy=http://xxx.cmcc:8080 

export http_proxy

source /etc/profile 使其生效

/etc/yum.conf
proxy=http://xxx.cmcc:8080/ 


/etc/wgetrc
http_proxy = http://xxx.cmcc:8080/