Red Hat Summit21.4. Kickstart error handling section
Starting with Red Hat Enterprise Linux 7, Kickstart installations run custom scripts when any fatal error encounters in the installation program. Example scenarios include requesting the installation of a missing package, RDP failing to start if specified in the configuration, or an error while scanning storage devices. In case of such events, installation aborts. To analyze these events, the installation program runs all %onerror scripts chronologically as provided in the Kickstart file. In the event of traceback, you can run the %onerror scripts.
Each %onerror script is required to end with %end.
You can trigger command-line mode by using inst.cmdline; in this mode, all errors are treated as fatal by default.
Error handling sections accept the following options:
--erroronfail-
Displays an error and halts the installation if the script fails. The error message will direct you to where the cause of the failure is logged. The installed system might get into an unstable and unbootable state. You can use the
inst.nokilloption to debug the script. --interpreter=Allows you to specify a different scripting language, such as Python. For example:
%onerror --interpreter=/usr/libexec/platform-pythonAny scripting language available on the system can be used; in most cases, these are
/usr/bin/sh,/usr/bin/bash, and/usr/libexec/platform-python.The
platform-pythoninterpreter uses Python version 3.6. You must change your Python scripts from previous RHEL versions for the new path and version. Additionally,platform-pythonis meant for system tools: Use thepython36package outside the installation environment. For more details about Python in Red Hat Enterprise Linux, see Introduction to Python.--log=- Logs the script’s output into the specified log file.
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