[action] [PR:13974] [test_ro_disk] Recover DUT to RW state by power-cycle when reboot doesn't work

[mssonicbld]

Description of PR

Summary:
On some platforms, DUT cannot be recovered from RO-disk state by reboot. (e.g., On Nokia-7215, we saw the reboot is blocked by systemd-journald.service) To avoid DUT stuck at RO disk state, this PR introduce power-cycle as the final approach to recover DUT.

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• Test case(new/improvement)

Back port request

• 202012
• 202205
• 202305
• 202311
• 202405

Approach

What is the motivation for this PR?

On some platforms, DUT cannot be recovered from RO-disk state by reboot. (e.g., On Nokia-7215, we saw the reboot is blocked by systemd-journald.service) To avoid DUT stuck at RO disk state, this PR introduce power-cycle as the final approach to recover DUT.

How did you do it?

If reboot failed to recover DUT from RO disk state, try power-cycle to recover the DUT.

How did you verify/test it?

Verified on Nokia-7215 M0 testbed. Get test passed with below logs:

tacacs/test_ro_disk.py::test_ro_disk[dut-7215-4]
-------------------------------------------------------------------------------- live log call --------------------------------------------------------------------------------
10:02:17 test_ro_disk.do_reboot L0089 ERROR | DUT did not go down, exception: run module command failed, Ansible Results =>
{"failed": true, "msg": "Timeout (62s) waiting for privilege escalation prompt: "} attempt:0/3
10:04:02 test_ro_disk.do_reboot L0089 ERROR | DUT did not go down, exception: run module command failed, Ansible Results =>
{"failed": true, "msg": "Timeout (62s) waiting for privilege escalation prompt: "} attempt:1/3
10:05:24 test_ro_disk.do_reboot L0089 ERROR | DUT did not go down, exception: run module command failed, Ansible Results =>
{"failed": true, "msg": "Timeout (62s) waiting for privilege escalation prompt: "} attempt:2/3
10:05:44 test_ro_disk.do_reboot L0095 ERROR | Failed to reboot DUT after 3 retries
10:05:44 test_ro_disk.test_ro_disk L0262 WARNING| Failed to reboot dut-7215-4, try PDU reboot to restore disk RW state
PASSED [100%]

Any platform specific information?

Supported testbed topology if it's a new test case?

Documentation

[mssonicbld]

Original PR: #13974