Red Hat Summit5.2. Included greenboot health checks
Health check scripts are available in /usr/lib/greenboot/check, a read-only directory in RPM-OSTree systems. The following health checks are included with the greenboot-default-health-checks framework.
Check if repository URLs are still DNS solvable:
This script is under
/usr/lib/greenboot/check/required.d/01_repository_dns_check.shand ensures that DNS queries to repository URLs are still available.Check if update platforms are still reachable:
This script is under
/usr/lib/greenboot/check/wanted.d/01_update_platform_check.shand tries to connect and get a 2XX or 3XX HTTP code from the update platforms defined in/etc/ostree/remotes.d.Check if the current boot has been triggered by the hardware watchdog:
This script is under
/usr/lib/greenboot/check/required.d/02_watchdog.shand checks whether the current boot has been watchdog-triggered or not.- If the watchdog-triggered reboot occurs within the grace period, the current boot is marked as red. Greenboot does not trigger a rollback to the previous deployment.
- If the watchdog-triggered reboot occurs after the grace period, the current boot is not marked as red. Greenboot does not trigger a rollback to the previous deployment.
-
A 24-hour grace period is enabled by default. This grace period can be either disabled by modifying
GREENBOOT_WATCHDOG_CHECK_ENABLEDin/etc/greenboot/greenboot.conf to false, or configured by changing theGREENBOOT_WATCHDOG_GRACE_PERIOD=number_of_hoursvariable value in/etc/greenboot/greenboot.conf.
'%20d='M201.5%20305.5c-13.8%200-24.9-11.1-24.9-24.6%200-13.8%2011.1-24.9%2024.9-24.9%2013.6%200%2024.6%2011.1%2024.6%2024.9%200%2013.6-11.1%2024.6-24.6%2024.6zM504%20256c0%20137-111%20248-248%20248S8%20393%208%20256%20119%208%20256%208s248%20111%20248%20248zm-132.3-41.2c-9.4%200-17.7%203.9-23.8%2010-22.4-15.5-52.6-25.5-86.1-26.6l17.4-78.3%2055.4%2012.5c0%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.3%2024.9-24.9s-11.1-24.9-24.9-24.9c-9.7%200-18%205.8-22.1%2013.8l-61.2-13.6c-3-.8-6.1%201.4-6.9%204.4l-19.1%2086.4c-33.2%201.4-63.1%2011.3-85.5%2026.8-6.1-6.4-14.7-10.2-24.1-10.2-34.9%200-46.3%2046.9-14.4%2062.8-1.1%205-1.7%2010.2-1.7%2015.5%200%2052.6%2059.2%2095.2%20132%2095.2%2073.1%200%20132.3-42.6%20132.3-95.2%200-5.3-.6-10.8-1.9-15.8%2031.3-16%2019.8-62.5-14.9-62.5zM302.8%20331c-18.2%2018.2-76.1%2017.9-93.6%200-2.2-2.2-6.1-2.2-8.3%200-2.5%202.5-2.5%206.4%200%208.6%2022.8%2022.8%2087.3%2022.8%20110.2%200%202.5-2.2%202.5-6.1%200-8.6-2.2-2.2-6.1-2.2-8.3%200zm7.7-75c-13.6%200-24.6%2011.1-24.6%2024.9%200%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.1%2024.9-24.6%200-13.8-11-24.9-24.9-24.9z'/%3e%3c/svg%3e){kind=small}