Splunk Search

extract message field from JSON

Esky73
Builder

trying to extract the msg field from an azure blob which uses the _json sourcetype - the msg : field shows as one long field - how to extract this please ?

msg: 2018-07-10T06:53:42.803Z email|5b3c37d::Rules::ValidateUser:: ::BEGIN-RULE::
Validate - user {"_id":"25fd57973c","email":"[email protected]","email_verified":true,"clientID":"8NReZXmds4","updated_at":"2018-07-10T06:53:42.764Z","name":"[email protected]","picture":"https://web.png","user_id":"email|5b3c37dd","nickname":"nickname","identities":[{"user_id":"5b3c3","provider":"email","connection":"email","isSocial":false}],"created_at":"2018-07-04T02:58:55.014Z","user_metadata":{"firstname":"bob","lastname":"bob","name":"bob bob"},"global_client_id":"rEJsAkwGVI","app_metadata":{"client_info":{"MyAccount":{"first_login_time":"2018-07-04T02:58:55.422Z","count":7,"last_login_time":"2018-07-10T06:49:40.126Z","user_id":"a0uid_xxxxx"}}},"client_info":{"MyAccount":{"first_login_time":"2018-07-04T02:58:55.422Z","count":7,"last_login_time":"2018-07-10T06:49:40.126Z","user_id":"a0uid_46"}},"persistent":{}}

thanks

*** UPDATE ***

So i've made some progress where i can create a new_msg field stripping off the non-json part of the msg field :

2018-07-10T06:53:42.803Z email|5b3c37d::Rules::ValidateUser:: ::BEGIN-RULE::Validate - user

and then that allows me to run spath on the new_msg

| rex field=msg "^[^{]+(?<new_msg>.*)" | spath input=new_msg

now my field count has gone from ~50 to 500+

Is there a better way ?

0 Karma

manish_singh_77
Builder

Pls try this in your search and let me know..

extract pairdelim=",", kvdelim='":"'

0 Karma

manish_singh_77
Builder

You can also use the below mentioned regex, there are two regex, one captures everything after msg and other captures only till email, try this and let me know if it works for you.

yourBaseQuery
|rex "\msg:\s+(?.*)"
| complete your search

yourBaseQuery
| rex \msg:\s+(?\w+-\w+-\w+:\w+:\w+.\w+\s+\w+)
| complete your search

0 Karma

Esky73
Builder

both of these errored with Regex: unrecognized character follows \

I have updated my progress above. TY

0 Karma
Got questions? Get answers!

Join the Splunk Community Slack to learn, troubleshoot, and make connections with fellow Splunk practitioners in real time!

Meet up IRL or virtually!

Join Splunk User Groups to connect and learn in-person by region or remotely by topic or industry.

Get Updates on the Splunk Community!

(re)Introducing the Splunk Community Champions + 2026 – 2027 Splunk MVPs ...

This program exists as a channel to empower and recognize Splunk advocates and help supercharge initiatives to ...

Introducing the 2026 - 2027 SplunkTrust cohort!

The goal of the SplunkTrust™ membership has historically been to acknowledge and recognize those who go above ...

Pro Tips for .conf26: How to Prep Like a Splunk Veteran

There’s no shortage of incredible content lined up for .conf26 in Denver, from deep-dive technical sessions ...