Portainer API Setup

To allow Portainer to add an environment. Docker must be configured to open the port for remote access. The firewall must also allow this port. Below is for no TLS.

Edit:

nano /lib/systemd/system/docker.service

Add the line and comment out the other ExecStart line.

ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock

Reload systemctl after the change

systemctl daemon-reload

Add fire exception (RHEL)

firewall-cmd --zone=public --add-port=2375/tcp --permanent
firewall-cmd --reload

Restart the service

systemctl restart docker.service