Yep, that helps. I want to use custom SCC as a last resort if none options exist. Thanks for validating .
Appreciated for quick response Slava
The "restricted" SCC doesn't allow any extra capabilities except those that are granted by default by Docker. So, the answer is "No, you can't".
If you "don’t want to relax or give privileged SCC", you still may create a custom SCC that will be identical to "restricted" but also allows CAP_LINUX_IMMUTABLE capability. Such SCC can be granted only to some clients, so they will be able to use it.
Hope this helps!
Slava Semushin | OpenShift