Splunk Search

Completely Newbie to REGEX

sarnagar
Contributor

I'm completely new to REGEX. Started off learning by going through some videos and splunk docs.
Can someone please provide further resource to get hands-on on these REGEXs.
1) When I use the regex developed from Splunk Field extractor in my props config it doesnt seem to work . What is that I need to tweak after I get the REGEX from Splunk?? If I'm not wrong splunk captures from the starting of the line instead of field-value pair.

2) I have events like below. I want three different REGEX extracting the fields as highlighted below: I tried quite a few but in vain. Can someone please help in configuring the 3 different REGEX for these 3 fields:

{"line":"[ERROR ] CWWKG0031E: The value jdbc/actionateDB specified for unique attribute jndiName is already in use.","source":"stderr","tag":"itec-artifactory.dis.com:6555/com.dis.pl000123.demo.actionate:0.0.1-25/Actionate_DEV_ACTIONATE.1.5tv4m4ckohx526muwvkcyo0v6/a078f70a8338"}
{"line":"[WARNING ] CWWKG0076W: The previous configuration for jndiReferenceEntry with id customDataSourceFactoryEntry is still in use.","source":"stdout","tag":"itec-artifactory.dis.com:6555/com.dis.pl000123.demo.actionate:0.0.1-25/Actionate_DEV_ACTIONATE.1.5tv4m4ckohx526muwvkcyo0v6/a078f70a8338"}
{"line":"","source":"stdout","tag":"itec-artifactory.dis.com:6555/com.dis.pl000123.demo.actionate:0.0.1-25/Actionate_DEV_ACTIONATE.1.5tv4m4ckohx526muwvkcyo0v6/a078f70a8338"}
{"line":"++ dirname /config/configDropins/defaults/keystore.xml","source":"stderr","tag":"itec-artifactory.dis.com:6555/com.dis.pl000123.demo.actionate:0.0.1-25/Actionate_DEV_ACTIONATE.1.5tv4m4ckohx526muwvkcyo0v6/a078f70a8338"}

I want to extract 3 fields from the above italicised line like below:
image=itec-artifactory.dis.com:6555/com.dis.pl000123.demo.actionate:0.0.1-25, service=Actionate_DEV_ACTIONATE.1.5tv4m4ckohx526muwvkcyo0v6,id=a078f70a8338

Greatly appreciate your help on this. Thankyou

0 Karma

gcusello
SplunkTrust
SplunkTrust

Hi sarnagar,
I'm not sure that this regex takes all your situations, every way it extract the field you asked.
Try this

\{\"([^\"]*\"){9}(?<image>.*)\/(?<service>Actionate[^\"]*)\/(?<id>.*)\"\}

see it at https://regex101.com/r/2mhZ25/1

Generally, you can test your regexes at https://regex101.com/

Bye.
Giuseppe

0 Karma

gokadroid
Motivator

If the "tag" element is always having four parts, can you try this at search time or use the regex while extracting in field extractor:

yourBaseQuery
| rex "\"tag\"\:\"(?<image>([^\/]+\/){2})(?<service>[^\/]+)\/(?<id>[^\"]+)"
| complete your query

See resulting extraction here

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