Could not fetch/save url /linux/centos/ to file /etc/
#First, create a systemd drop-in directory for the Docker service:
mkdir /etc/systemd/system/
#Now create a file called /etc/systemd/system// that adds the HTTP_PROXY environment variable:
# 换成自己的代理ip
[Service]
Environment="HTTP_PROXY=:80/"
#If you have internal Docker registries that you need to contact without proxying you can specify them via the NO_PROXY environment variable:
Environment="HTTP_PROXY=:80/"
Environment="NO_PROXY=localhost,127.0.0.0/8,"
#Flush changes:
$ sudo systemctl daemon-reload
#Verify that the configuration has been loaded:
$ sudo systemctl show --property Environment docker
#output: Environment=HTTP_PROXY=:80/
#Restart Docker:
$ sudo systemctl restart docker