Soft reboot prep#4133
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The Go `exec.Command` when used naively like this captures stderr and then it gets lost. It turned out with soft reboot it was this `mkfifo` that was failing but all we got is "Child process exited with code 1" but there are like 5 different processes on two different hosts that could be talking about, and we *really* thought it was talking about the code-under-test, not the framework setting it up.
Amazingly we had *two* places that dropped stderr, this was the second. The default `c.SSH` captures logs from test failures but this was an *infra* failure so we need to drop to the raw ssh tool. (This could use a big cleanup but that's...a bigger project)
This definitely adds some chatter at debug level but I think it's really worth it.
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/retest-required |
jlebon
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Jun 6, 2025
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Prow failing on coreos/rhel-coreos-config#20. /override ci/prow/rhcos |
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@jlebon: Overrode contexts on behalf of jlebon: ci/prow/rhcos DetailsIn response to this:
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Prep for #4119
kolet: Capture error messages from mkfifo
The Go
exec.Commandwhen used naively like this capturesstderr and then it gets lost.
It turned out with soft reboot it was this
mkfifothat wasfailing but all we got is "Child process exited with code 1"
but there are like 5 different processes on two different hosts
that could be talking about, and we really thought it
was talking about the code-under-test, not the framework setting
it up.
kola: Don't drop stderr on the floor from unit starting function
Amazingly we had two places that dropped stderr, this was
the second. The default
c.SSHcaptures logs from test failuresbut this was an infra failure so we need to drop to the
raw ssh tool.
(This could use a big cleanup but that's...a bigger project)
mantle: Log commands executed over ssh and return code
This definitely adds some chatter at debug level but I think
it's really worth it.