Ambiguous TestGetentPasswdOsloginUser failure in oslogin suite

[kajiya3141]

N.B: We're currently pinned to commit c75566e63b2... but are planning to update the pin again very soon

Hey there everyone! 😄

The oslogin suite is looking much better now (down from 5 failures to just 1 - thanks again for the help there!), but we're still seeing a single failure in TestGetentPasswdOsloginUser:

 <?xml version="1.0" encoding="UTF-8"?>
 <testsuites time="35.420" tests="12" failures="1" skipped="4">
 	<testsuite name="oslogin-daily-ubuntu-2204-jammy-v20240823" tests="12" failures="1" errors="0" id="0" skipped="4" time="35.420">
 		<testcase name="TestOsLoginEnabled" classname="" time="0.000"></testcase>
 		<testcase name="TestGetentPasswdOsloginUser" classname="" time="0.080">
 			<failure message="Failed"></failure>
 		</testcase>
 		<testcase name="TestOsLoginDisabled" classname="" time="0.000"></testcase>
 		<testcase name="TestSSH" classname="" time="17.550"></testcase>
 		<testcase name="TestAdminSSH" classname="" time="1.850"></testcase>
 		<testcase name="Test2FASSH" classname="" time="3.970"></testcase>
 		<testcase name="Test2FAAdminSSH" classname="" time="3.400"></testcase>
 		<testcase name="TestAgent" classname="" time="8.570"></testcase>
 		<testcase name="TestGetentPasswdAllUsers" classname="oslogin-daily-ubuntu-2204-jammy-v20240823">
 			<skipped message=""><![CDATA[TestGetentPasswdAllUsers disabled on projects/ubuntu-os-cloud-devel/global/images/daily-ubuntu-2204-jammy-v20240823]]></skipped>
 		</testcase>
 		<testcase name="TestGetentPasswdOsloginUID" classname="oslogin-daily-ubuntu-2204-jammy-v20240823">
 			<skipped message=""><![CDATA[TestGetentPasswdOsloginUID disabled on projects/ubuntu-os-cloud-devel/global/images/daily-ubuntu-2204-jammy-v20240823]]></skipped>
 		</testcase>
 		<testcase name="TestGetentPasswdLocalUser" classname="oslogin-daily-ubuntu-2204-jammy-v20240823">
 			<skipped message=""><![CDATA[TestGetentPasswdLocalUser disabled on projects/ubuntu-os-cloud-devel/global/images/daily-ubuntu-2204-jammy-v20240823]]></skipped>
 		</testcase>
 		<testcase name="TestGetentPasswdInvalidUser" classname="oslogin-daily-ubuntu-2204-jammy-v20240823">
 			<skipped message=""><![CDATA[TestGetentPasswdInvalidUser disabled on projects/ubuntu-os-cloud-devel/global/images/daily-ubuntu-2204-jammy-v20240823]]></skipped>
 		</testcase>
 	</testsuite>
 </testsuites>

I'm struggling to replicate this locally, do you have any ideas? I'm wondering aloud if this is a permissions error to canonical-oslogin-cit, but I can't confirm that on my end.

Thanks in advance!
Chlo

[a-crate]

FYI @drewhli if you have any thoughts

[drewhli]

If you have access to the serial logs for the instance that ran the test, that would be helpful. However, I think I know the root cause.

The test assumes that the default service account running on the instance has a POSIX account associated with it. If such a POSIX account doesn't exist, then the test segfaults, causing the ambiguous Failed error message. You'll probably see a panic message in the serial logs for the instance along the lines of panic: runtime error: index out of range [0] with length 0.

I'll put out a change to fix this so that the absence of an associated POSIX account does not cause this segfault and returns an error instead. In the meantime, you may need to connect to the VM using the default service account, and then check the login-profile to make sure a POSIX account exists.

[a-crate]

@kajiya3141 are you still seeing the same failure?

[kajiya3141]

Sorry all, I missed this notification! Let me follow up and get back to you when we've re-enabled CIT across our test matrix again soon 😄