Systemctl Tool: Collect debug logs if service fails to start/restart

[adityagesh]

Collection of additional logs when service fails will reduce the need for repro creation.

[Copilot]

Pull Request Overview

Adds automatic collection of debug logs (systemctl status, journalctl, dmesg) when a service start or restart operation fails.

• Imported Dmesg and Journalctl tools.
• Enhanced restart_service and start_service to call _collect_logs on non-zero exit codes.
• Introduced a new _collect_logs method to gather and log relevant system output.

Comments suppressed due to low confidence (3)

lisa/base_tools/service.py:225

• Add an integration or end-to-end test to verify that failures in start_service and restart_service correctly invoke _collect_logs and log journal and dmesg outputs.

    def _collect_logs(self, service_name: str, operation: str) -> None:

lisa/base_tools/service.py:54

• Remove the redundant wrapper method for start_service defined at lines 54-56, as it is shadowed by the later implementation that includes log collection.

    def start_service(self, name: str, ignore_exit_code: int = 0) -> None:

lisa/base_tools/service.py:151

• The call to _check_error_codes is indented inside the if block, so it only runs on failure; it should be dedented to always execute after capturing logs.

        _check_error_codes(cmd_result, ignore_exit_code)

[squirrelsc]

@LiliDeng LGTM