System tests: leak_test: readable output

[edsantiago]

BATS teardown logs are unreadable, making it almost impossible
to see tiny "Leaked this-or-that" messages.

Solution: new _run_podman_quiet() helper, replaces run_podman
in a small number of cases within teardown. Clunky, and
duplicative, sorry.

New helper for leak_check, basically spits out warnings (and
bumps error count) if it sees any output whatsoever from
individual "podman XXX ls" commands.

Signed-off-by: Ed Santiago santiago@redhat.com

None

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[edsantiago]

Sample output, from an instrumented leaky test:

   # [teardown]
   vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
   *** Leaked volume: v-t2-hjiynoxe local
   vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
   *** Leaked network: ab9b8a85da70  n-t2-hjiynoxe                bridge
   vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
   *** Leaked pod: ea9ebc98aa49 p-t2-hjiynoxe status=Running (2 containers)
   vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
   *** Leaked container: 8977caec43ce localhost/podman-pause:5.2.0-dev-1722336465 ea9ebc98aa49-infra  Up 2 seconds
   *** Leaked container: 9b87b635ba56 docker.io/library/alpine:latest p-t2-hjiynoxe-c-t2-hjiynoxe  Up 2 seconds
   vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
   *** Leaked storage container: 6d18a153164b quay.io/libpod/testimage:20240123 b-t2-hjiynoxe  Storage
   vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
   *** Leaked image: 961769676411 docker.io/library/alpine:latest

Sample output from a run of my parallelized system tests:

# vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
# *** Leaked container: 801e865f2df4 quay.io/libpod/testimage:20240123 c-socat-t160-0iorymqk  Up 2 minutes
# *** Leaked container: 6c5a24aef9e7 quay.io/libpod/testimage:20240123 c-socat-t177-7j1egwth  Up 2 minutes
# *** Leaked container: a429efe7a7d1 quay.io/libpod/testimage:20240123 c-socat-t187-8jcmyued  Up 2 minutes
# vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
# *** Leaked storage container: a6dd24b5bba8 quay.io/libpod/testimage:20240123 p-t207-m7nu6d87-c-t207-m7nu6d87  Storage

This is a stepping-stone PR. I think more fine-tuning is warranted here, and will look into it over the course of my parallelization work. I also think the whole clean_setup() model needs to go away. That will take careful work.

[rhatdan]

LGTM

[edsantiago]

Hahahaha, it works! As in, I forgot that #23431 has not merged yet, and since it hasn't, the external-containers test blew up. Lots of shiny pretty red. Here's what the new leak failure looks like. Some day I will figure out how to clean up the icky multi-line commands above.

With that PR merged, in #23275, all green. (Confirmation that this PR works in the no-problems condition).

[Luap99]

LGTM

[Luap99]

/lgtm