How do I resolve Docker Machine Agent permission errors?

[Rajendra.Nautiyal]

Issue

While running the docker-compose up command, the Docker container for the Machine Agent is not running. The following permission error is shown.

Could not start up the machine agent due to: Failed to get a response from /info using a GET request. The error encountered is: XXXX:XXXXX:XXXX: Permission denied (socket: /run/docker.sock) ​

This issue occurs on a default installation when a user other than the root user, or a user outside of the Docker group, is trying to access the socket.

Solution

First, check to make sure the mount is properly configured.

Then, if you have eliminated configuration as the cause, run the following command in the machine terminal.  

sudo usermod -a -G docker $username

Finally, log out of the account completely, and log back in. 

Related Links:

• Solving Docker permission denied while trying to connect to the Docker daemon socket

• Video: Docker Visibility explained 
  • If you have any issues viewing the above video please email education@appdynamics.com.