[ocp] Fix backtrace in ocp collector

[jcastill]

While runnng sos collector in an ocp cluster
we got the following trace:

Traceback (most recent call last):
File "/usr/sbin/sos", line 22, in
sos.execute()
File "/usr/lib/python3.6/site-packages/sos/init.py",
line 193, in execute
self._component.execute()
File "/usr/lib/python3.6/site-packages/sos/collector/init.py",
line 1175, in execute
self.prep()
File "/usr/lib/python3.6/site-packages/sos/collector/init.py",
line 896, in prep
self.cluster.setup()
File "/usr/lib/python3.6/site-packages/sos/collector/clusters/ocp.py",
line 132, in setup
out = self.exec_primary_cmd(self.fmt_oc_cmd("auth can-i '' ''"))
File "/usr/lib/python3.6/site-packages/sos/collector/clusters/ocp.py",
line 104, in fmt_oc_cmd
return "%s %s" % (self.oc_cmd, cmd)
File "/usr/lib/python3.6/site-packages/sos/collector/clusters/ocp.py",
line 81, in oc_cmd
'which oc', chroot=self.primary.host.sysroot
TypeError: run_command() got an unexpected keyword argument 'chroot'

This patch changes the unused option 'chroot' that was undefined in run_command()
to the option need_root that was in use in other commands in ocp.py.

Related: RH: RHEL-24351

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[packit-as-a-service]

Congratulations! One of the builds has completed. 🍾

You can install the built RPMs by following these steps:

• sudo yum install -y dnf-plugins-core on RHEL 8
• sudo dnf install -y dnf-plugins-core on Fedora
• dnf copr enable packit/sosreport-sos-3515
• And now you can install the packages.

Please note that the RPMs should be used only in a testing environment.

[alosadagrande]

verified the fix in my lab environment, lgtm

[TurboTurtle]

These are very much not the same thing, and this is not the correct fix.

chroot means "run this command in a chroot, so that we aren't in '/'". The conditional before this makes it obvious that we're trying to make sure that we run in the host's mounted filesystem, not inside the container.

need_root simply makes sure we're executing as the root user, or otherwise we use `sudo.

[jcastill]

They are not the same thing, but run_command() doesn't provide a 'chroot' argument. It does provide a 'need_root' argument, and it's used in other places in ocp.py, like in line #349. Should we instead rewrite run_command() to accept a chroot argument?

[pmoravec]

So what should be the right way of detecting oc binary inside a container?

Should we search for the binary on the host (that sounds meaningful to me, as oc is the tool to manage containers, so it should run on host and not necessarily in container, am I right?)?

Or should we search for the binary under root (that does work in practise)?

When I am in a container, what is the correct way of detecting path to (the right?) oc binary?

If we dont know 100% answer to the latest question, I lean towards the current fix - which fixes missing parameter of a method (that never works) by something that works (at least in the tested use cases).

[TurboTurtle]

The correct way is to look in the mounted root filesystem inside the container, which would be passed by the HOST or similar env var and be known to sos. This is what the chroot is intended for.

The current change does not actually fix that binary discovery. It simply runs which oc. The needs_root here is meaningless as we'd already be root in the container.

[jcastill]

Ok, so I'll remove that part and resend the PR with only the fix that solves the backtrace.

[jcastill]

I removed need_root=True from the commit, and the fix is now just removing the option that triggered the call trace.

[pmoravec]

Is propr oc detected, then? Could @alosadagrande test it, please? The chroot "scope" of the oc binary search is really not needed?

[jcastill]

Is propr oc detected, then? Could @alosadagrande test it, please? The chroot "scope" of the oc binary search is really not needed?

The default of 'chroot' is False iIrc, so Alberto's test should tell us more for sure

[pmoravec]

Is propr oc detected, then? Could @alosadagrande test it, please? The chroot "scope" of the oc binary search is really not needed?

The default of 'chroot' is False iIrc, so Alberto's test should tell us more for sure

Kindly requesting @alosadagrande for a test..

[alosadagrande]

I do not have the environment anymore. I'll try to ask for a new one, but it can take a couple of weeks

[arif-ali]

@alosadagrande @jcastill any update on this one

[jcastill]

The only blocker in this one is to test the latest fix. I'll try to set up an environment in the lab and check it soon.