However, neither EXPOSE nor -expose depend on the host in any way these rules don't make ports accessible from the host by default. These are equivalent commands, though -expose will accept a range of ports as an argument, such as -expose=2000-3000. Root 21812 1.0 0.8 1017512 67876 ? Ssl 15:11 0:06 /usr/bin/dockerd -graph=/var/lib/docker -storage-driver=overlay -H tcp://0.0.0.0:4243 -H unix:///var/run/docker.You can expose a port in two ways: either in the Dockerfile with the EXPOSE instruction, or in the docker run string with -expose=1234. To verify if everything is working fine, you can run any (or all) of below commands # systemctl status rvice | grep tcp # systemctl daemon-reload & systemctl stop docker & rm -f /var/run/docker.sock & systemctl start docker Once, the above file is changed just the run the below command to activate the changes. Now, my files looks like this # cat /etc/systemd/system//nfĮxecStart=/usr/bin/dockerd -graph=/var/lib/docker -storage-driver=overlay -H tcp://0.0.0.0:4243 -H unix:///var/run/docker.sock In file /etc/systemd/system//nf, replace the last ExecStart (there are two) with below ExecStart=/usr/bin/dockerd -graph=/var/lib/docker -storage-driver=overlay -H tcp://0.0.0.0:4243 -H unix:///var/run/docker.sock This is what worked after few hit and trials. I believe things have changed now, this answer by Brian Ogden had worked for me earlier but didn't work on my environment today, probably with the updated versions of the docker, kernel, and OS. Root 8574 0.0 0.2 321708 10564 ? Ssl 00:42 0:00 /usr/bin/docker -d -H tcp://127.0.0.1:4243 -H fd:// -selinux-enabledĪs you can see, it does now listen on the configured TCP address, and will persist over reboots and service stop/starts. (I only need Docker to listen on the loopback, instead of all IP addresses.)Īfter making this edit to the systemd unit file and restarting the Docker service via systemctl restart docker, I see the following process: On my system, the entire contents of rvice then looks like: ĭescription=Docker Application Container EngineĮxecStart=/usr/bin/docker -d -H tcp://127.0.0.1:4243 -H fd:// $OPTIONS (notice there's no "=" between the -H and the IP address as in your example DOCKER_OPTS line above.) In this file, edit the line in the section beginning with ExecStart=. Mine is located at: /usr/lib/systemd/system/rvice Or it will cause issues in my current deployment playbook.Īny thoughts on what I can do to set DOCKER_OPTS and not have to do it every time I restart docker?įind the systemd rvice unit file. I need to be able to start docker with just service docker start I also tried writing the file to /etc/default/docker.io and /etc/default/docker-io (didn't really expect much to happen) It seems that docker is completely ignoring my /etc/default/docker file so the settings are being ignored. That works, but I want the default option to be listening on tcp://0.0.0.0:4243 without having to specify it every time. I can make docker run correctly by typing sudo /usr/bin/docker -H tcp://0.0.0.0:4243 -d &
![docker network options docker network options](https://geekylane.com/wp-content/uploads/2019/05/2-Check-and-ispect-the-default-configuration-of-host-network.png)
I've done this, but when I restart docker it does not listen to 127.0.0.1 Which will write the correct docker_opts to /etc/default/docker. All the documentation I have seen has told me to run the following command echo DOCKER_OPTS="-H=tcp://127.0.0.1:4243" > /etc/default/docker
![docker network options docker network options](https://linuxhint.com/wp-content/uploads/2017/11/word-image-42.png)
![docker network options docker network options](https://miro.medium.com/max/1316/1*d15X-shTxQyi7WjnOc69BA.png)
I need to set docker to listen to tcp://0.0.0.0/4243 on my host machine running amazon linux (centos).