ConfigSource to compare to a known template (PoC) | Product Discussions

Antony_Hawkins · 2017-10-20T16:32:38Z

LM Config is awesome - but until now you've not been able to compare a config to a "known good" template.Now you can...Edit for v1.4.0+: Now gives a MUCH cleaner output (in my humble opinion) - see comments below for details. v1.4.0: 2GTW7WIf you really want the earlier version with its more expansive output, v1.3.0 as detailed in this first post is at XHDDP4Edit for v1.3.0+: The groovy check that picks up on the change-from-template flags is now more flexible, in that it looks at each line in turn (rather than the entire config object) so you can more carefully identify matches to be alerted on.This is very much only a proof-of-concept, which will show the method to use. As written it will do nothing in your account as it looks for a couple of test files I created specifically for this in my account.Suppose you have this template file (configTestTemplate.txt) for a config:# Config test file:# Here's a config test fileSetting1=1Setting2=2Setting3=3# The above must never be changedNow, suppose the actual config (in configTestConfig.txt) is like this:# Config test file:# Here's a config test fileSetting1=1Setting2=2Setting3=4# The above must never be changedIf you can't see it, 'Setting3' has been changed...This ConfigSource will read in both the config (from file in this example, but it could be from SSH, etc) and the template from file, then run through the template and compare each line to the equivalent line in the config.Where it finds a discrepancy between the two, these are listed in the output after the actual config, marked with 'DISCREPANCY', as in the screenshot below. The template used for comparison is also returned:Config Checks then pick up on changes as you'd normally expect, and also if the output contains 'DISCREPANCY'.Notes:You must have LM Config to use this The template file must contain the EXACT same text in the EXACT same format as the config will be produced, because this PoC only checks line 1 against line 1, line 2 against line 2, etc. If your template contains 'DISCREPANCY' you'll have to come up with some other keyword to print and alert on, obviously.

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