permission denied, mkdir in container on openshift

You can also run the below command which grants root access to the project you are logged in as:

oc adm policy add-scc-to-user anyuid -z default

OpenShift will by default run containers as a non root user. As a result, your application can fail if it requires it runs as root. Whether you can configure your container to run as root will depend on permissions you have in the cluster.

It is better to design your container and application so that it doesn't have to run as root.

A few suggestions.

• Create a special UNIX user to run the application as and set that user (using its uid), in the USER statement of the Dockerfile. Make the group for the user be the root group.

• Fixup permissions on the /src directory and everything under it so owned by the special user. Ensure that everything is group root. Ensure that anything that needs to be writable is writable to group root.

• Ensure you set HOME to /src in Dockerfile.

With that done, when OpenShift runs your container as an assigned uid, where group is root, then by virtue of everything being group writable, application can still update files under /src. The HOME variable being set ensures that anything written to home directory by code goes into writable /src area.