Customizing panic detection and install failure detection¶

The beaker-watchdog daemon on the lab controller scans console logs to detect if a recipe has triggered a kernel panic, or if the installation has failed with a fatal error.

You can customize the regexp pattern for detecting kernel panics by setting PANIC_REGEX in /etc/beaker/labcontroller.conf. The default pattern that ships with Beaker is defined in /usr/lib/python2.7/site-packages/bkr/labcontroller/default.conf. The pattern uses Python regular expression syntax.

Install failure patterns are read from a directory (rather than using a single pattern like the panic detection). Each file contains a regexp pattern which is checked against the console log. If any pattern matches, the installation is considered to have failed.

Beaker ships a number of default patterns in the /usr/lib/python2.7/site-packages/bkr/labcontroller/install-failure-patterns/ directory. You can define extra custom patterns by placing them in /etc/beaker/install-failure-patterns/. A custom pattern overrides a default pattern with the same filename. If a pattern is empty, Beaker ignores it. If you want to disable a default pattern, create an empty file with the same name in /etc/beaker/install-failure-patterns/.