e2e TestNoReboot fails on RHEL10: GetSSHPaths missing EL10 handling

[sarthakpurohit]

Summary

The TestNoReboot e2e test is persistently failing across multiple CI jobs on RHEL10/CentOS10 clusters because GetSSHPaths() in test/helpers/utils.go does not handle EL10.

Failing Jobs

• pull-ci-openshift-machine-config-operator-main-e2e-gcp-op-single-node
• pull-ci-openshift-machine-config-operator-main-e2e-gcp-op-part1
• pull-ci-openshift-machine-config-operator-main-e2e-gcp-op-part2
• pull-ci-openshift-machine-config-operator-main-e2e-gcp-op-ocl-part1
• pull-ci-openshift-machine-config-operator-main-e2e-gcp-op-ocl-part2

Root Cause

GetSSHPaths() in test/helpers/utils.go:783 checks for IsEL9(), IsSCOS(), and IsFCOS() to return the new SSH key path (/home/core/.ssh/authorized_keys.d/ignition), but does not check for IsEL10():

func GetSSHPaths(os osrelease.OperatingSystem) SSHPaths {
    if os.IsEL9() || os.IsSCOS() || os.IsFCOS() {
        return SSHPaths{
            Expected:    constants.RHCOS9SSHKeyPath,
            NotExpected: constants.RHCOS8SSHKeyPath,
        }
    }
    // Falls through to RHCOS8 path for EL10, which is wrong
    return SSHPaths{
        Expected:    constants.RHCOS8SSHKeyPath,
        NotExpected: constants.RHCOS9SSHKeyPath,
    }
}

On RHEL10, IsEL9() returns false, so the function falls through to the default case and returns the legacy path /home/core/.ssh/authorized_keys. However, RHEL10 uses the new path /home/core/.ssh/authorized_keys.d/ignition.

Error Output

Error: expected to find file /rootfs/home/core/.ssh/authorized_keys on node, got:
stat: cannot statx '/rootfs/home/core/.ssh/authorized_keys': No such file or directory

Error: expected not to find file /rootfs/home/core/.ssh/authorized_keys.d/ignition on node, got:
File: /rootfs/home/core/.ssh/authorized_keys.d/ignition (file exists)

Suggested Fix

Add IsEL10() to the condition in GetSSHPaths():

if os.IsEL9() || os.IsEL10() || os.IsSCOS() || os.IsFCOS() {

Related

• PR MCO-1976: [Dev] Fix RHEL9-specific MCD Logic for RHEL10/CentOS10 Compatibility #5415 (MCO-1976) introduced RHEL10 SSH key path handling in the daemon but did not update the e2e test helper.