Config docker behind proxy on CentOS 7

After install docker need to add ca certificate to CentOS 7 copy ca certificates into

 

after than use follow command to update certificates

 

now add proxy settings into docker config file /etc/sysconfig/docker as follow

 

if use docker community edition (docker-ce) can use a conf file to set proxy, es /etc/systemd/system/docker.service.d/http-proxy.conf:

 

can see documentation here: https://docs.docker.com/config/daemon/systemd/#httphttps-proxy

 

for sudo without password add row indo /etc/sudoers

 

configure docker engine to start at boot: