DOCKER_OPTS do not work in config file /etc/default/docker

Question

I have changed /etc/default/docker with DOCKER_OPTS=\"-H tcp://127.0.0.1:2375 -H unix:///var/run/docker.sock\" (docker version 1.4.1 in ubuntu 14.0

Answer 1

Well i have face a lot of issue in spinning on demand slave from jenkins because of docker daemon port restrictions.

so i did

sudo systemctl edit docker.service

Added below section

[Service]
ExecStart=
ExecStart=/usr/bin/docker daemon --host=tcp://0.0.0.0:2375

Save the file

run below command

$ sudo systemctl daemon-reload
$ sudo systemctl restart docker.service

**NOTE: This will expose your daemon publicly and anyone with your ip and port can do any thing with your docker daemon **