I have a virtual machine hosting Oracle Linux where I've installed Docker and created containers using a docker-compose file. I placed the jenkins volume under a shared folder but when starting the docker-compose up I got the following error for Jenkins :
jenkins | touch: cannot touch ‘/var/jenkins_home/copy_reference_file.log’: Permission denied jenkins | Can not write to /var/jenkins_home/copy_reference_file.log. Wrong volume permissions? jenkins exited with code 1
Here's the volumes declaration
volumes:
- "/media/sf_devops-workspaces/dev-tools/continuous-integration/jenkins:/var/jenkins_home"
The problem is, that your user in the container has different userid:groupid as the user on the host.
you have two possibilities:
You can ensure that the user in the container has the same userid:groupid like the user on the host, which has access to the mounted volume. For this you have to adjust the user in the Dockerfile. Create a user in the dockerfile with the same userid:groupid and then switch to this user https://docs.docker.com/engine/reference/builder/#user
You can ensure that the user on the host has the same userid:groupid like the user in the container. For this, enter the container with docker exec -it <container-name> bash and show the user id id -u <username> group id id -G <username>. Change the permissions of the mounted volume to this userid:groupid.