gistfile1.txt

[Unit]
Description = Docker with enabled TCP Socket
After=etcd.service
After=docker.service

[Service]
Environment="http_proxy=http://xxx:3128"
Environment="https_proxy=http://xxx:3128"
Environment="no_proxy=index.example.com"
ExecStartPre=/usr/bin/systemctl kill docker
ExecStartPre=/bin/mount --make-rprivate /
# Run docker but don't have docker automatically restart
# containers. This is a job for systemd and unit files.
ExecStart=/usr/bin/docker -d -r=false -H tcp://127.0.0.1:4243 -H unix:///var/run/docker.sock 

[Install]
WantedBy=local.target