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Description of problem:

Right now we have MountFlags=slave in docker.service systemd unit file for RHEL. RHEL7.4 has now some kernel patches which can allow docker daemon to run in host mount namespace and we can get rid of MountFlags=slave there.

So modify docker.service unit file and get rid of MountFlags=slave. But tricky
part is that this change should take affect only for rhel7.4 and higher kernels.
If anybody takes docker package and installs on rhel7.3, they should still get
a unit file which has MountFlags=slave

I am assuming that we can do some magic in spec file and figure out product
version and install appropriate docker.service file accordingly.

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.
2.
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Actual results:


Expected results:


Additional info:

We will not do this until 7.5.

Hello, can you tell me which kernel patchs backported at redhat 7.4 to solve this problem ? Thanks ~

(In reply to Daniel Walsh from comment #2)
> We will not do this until 7.5.

It's 3.5 time and Mount=slave is still in docker service file.
We need no extra mount namespace in docker (or rshared namespace) for OpenShift 3.9 and onwards.

Docker containers must be able to run with `-v /var/lib/origin:/var/lib/origin:rshared` and OpenShift on the host must see mounts created by these containers.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:1071

The needinfo request[s] on this closed bug have been removed as they have been unresolved for 1000 days