A quick reference of regular expressions recipes you can use to capture common stings and log output using Rundeck log filters.
Note: These examples assume users are familiar with the supporting settings and components of the Rundeck Log Filter feature for logging and variable assignment.
A Rundeck Job may define multiple Log Filters to process the output of steps within the workflow. These examples will focus on (2) specific types:
Each log filter applys a different regex pattern match aginst the log results. For more details on how the pattern match work, please reference the documentation for an extended explination.
Our tester tool is a Rundeck job that you can leverage to run a few examples inline and play a bit with your pattern match. The tester toolcan be found on our RDSE instance. Give it a try! Happy to take/include feedabck for enhancements.
- filter-type:
multiline - regex-match:
/^.*tmpfs\s*(\w+)/
Input:
Filesystem 1K-blocks Used Available Use% Mounted on
udev 1968008 0 1968008 0% /dev
tmpfs 396516 1488 395028 1% /run
tmpfs 1982568 0 1982568 0% /sys/fs/cgroup
/dev/loop5 256 256 0 100% /snap/jq/6'/
Output:
tmpfs 396516 1488 395028 1% /run
tmpfs 1982568 0 1982568 0% /sys/fs/cgroup
- filter-type:
key/value - regex-match:
/^.+?((?:\d+\.){3}\d+).+$/
Input:
rule family="ipv4" source address="54.246.81.158" reject"
Output:
54.246.81.158
- filter-type:
key/value - regex-match:
/^.+\s*(https://[-a-zA-Z0-9+&@#/%?=~_|!:, .;]*[-a-zA-Z0-9+&@#/%=~_|].+)/
Input:
please contact us at https://support.rundeck.com/portal
Output:
https://support.rundeck.com/portal
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