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:


for sudo without password add row indo /etc/sudoers


configure docker engine to start at boot: