papr: build and test on c7

[jlebon]

Start testing on CentOS 7 as well to cover kernel differences (e.g.
O_TMPFILE support).

[jlebon]

Hmm

cp: cannot stat '/bin/busybox': No such file or directory
1..3
ERROR: tests/test-switchroot.sh - too few tests run (expected 3, got 0)
ERROR: tests/test-switchroot.sh - exited with status 1

Coming from:

	cp /bin/busybox "$1/bin"
	busybox --list | xargs -n1 -I '{}' ln -s busybox "$1/bin/{}"

But I'm confused how that ever worked. Looking at recent tests, this test is skipped because of:

	unshare -m true || \
	    skip "this test needs to set up mount namespaces, rerun as root"

Seems like we should make it conditional on having /bin/busybox?

[cgwalters]

Yes, but there's an issue before that; test-switchroot.sh requires CAP_SYS_ADMIN, which f25-primary doesn't have, but you do have since you're running the container with --privileged.

It looks like we should just skip this test if we don't have busybox, but also try to install it?

Hrm, also this test doesn't quite work installed yet 😦

[jlebon]

Right, it's only showing up now because unshare doesn't fail. EPEL doesn't seem to have it unfortunately. :(

It looks like we should just skip this test if we don't have busybox, but also try to install it?

Yup, done above! ⬆️

[cgwalters]

unshare is part of util-linux.

[cgwalters]

@rh-atomic-bot r+ 61a63cd

[rh-atomic-bot]

⌛ Testing commit 61a63cd with merge 79f285d...

[jlebon]

Sorry, the "it" in my second sentence was referring to busybox, not unshare (in response to your suggestion to try to install it). I didn't look too hard if we could get it easily from somewhere else.

[rh-atomic-bot]

☀️ Test successful - status-atomicjenkins
Approved by: cgwalters
Pushing 79f285d to master...