Portainer: connect docker API via net

Remote server:

1. Show the docker config file: systemctl show –property=FragmentPath docker
2. Edit it : nano /usr/lib/systemd/system/docker.service
3. Find the ExecStart line, and add a port to it.

ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H fd:// --containerd=/run/containerd/containerd.sock

Do not forget the “-H” behind tcp://0.0.0.0:2375.

4. Reload config file: systemctl daemon-reload

5. Restart docker: systemctl restart docker

6. If you installed a firewall in your device, you need extra steps to allow this port.

firewall-cmd --zone=public --add-port=6379/tcp --permanent
firewall-cmd --reload

Then we can add a new environment to your potainer server.

Full fill it and everything is done.

I suggest you use these commands rather than the official command to run Potainer:

docker volume create portainer_data
docker run -d -p 9000:9000 -p 9443:9443 --name portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce:latest

9000 is the HTTP port, 9443 is the HTTPS port.

Remember we use a standalone and CE version.

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