Add kexec reboot test suite - #4273
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Pull request overview
Adds a new Microsoft LISA test suite to validate end-to-end kexec reboot behavior on Linux remote nodes, aiming to ensure a kernel-to-kernel reboot flow is working in deployed environments.
Changes:
- Introduces
KexecSuitewith an end-to-endverify_kexec_reboottest case. - Implements kexec tooling install checks, kernel/initrd discovery, kexec load/execute, reconnect logic, and post-reboot validation via a persisted marker file.
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Implements end-to-end kexec functionality test that validates kernel-to-kernel reboot without firmware involvement. - Loads current kernel via kexec -l with matching initrd - Validates boot_id change and uptime reset after reboot - Auto-installs kexec-tools if missing - Multi-distro support (Ubuntu, RHEL, Debian, Azure Linux)
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Mostly LGTM now! Just a few more comments and the serial console log collection implementation is pending.
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Just one comment. Everything else is good to go!
- verify_kexec_reboot_systemd: Tests systemd integration path (systemctl kexec) - verify_kexec_reboot_direct: Tests raw kernel execution path (kexec -e) - Refactored _trigger_kexec_reboot to accept use_systemctl parameter - Removed fallback logic - each test case uses its own method exclusively - Removed unreliable dmesg check, kept journalctl for evidence (best effort) - Added SkippedException when systemctl not available for systemd test This addresses review feedback that kexec -e deserves its own test case and shouldn't be a fallback, allowing us to identify which integration path breaks when tests fail.
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Anirudh Rayabharam (anirudhrb)
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Implements end-to-end kexec functionality test and validates end-to-end kexec reboot functionality and post-reboot system health.