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Questions tagged [logstash-grok]

Grok is an abstraction on top of regular expressions to allow easy parsing of unstructured text into structured and queryable form.

Parse arbitrary text and structure it.

Grok is a great way to parse unstructured log data into something structured and queryable.

This tool is perfect for syslog logs, apache and other webserver logs, mysql logs, and in general, any log format that is generally written for humans and not computer consumption.

Logstash ships with about 120 patterns by default. You can find them here: https://github.com/logstash-plugins/logstash-patterns-core/tree/master/patterns. You can add your own trivially. (See the patterns_dir setting)

If you need help building patterns to match your logs, you will find at:

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Logstash filtering using grok to filter the log with []

I have the below log captured in elastic serach which we view via kibana gui. Now we need to break down the log into datetime stamp, log level, object name, description etc to display them in a dashboard. {"message":" Mon Dec 15 2014 05:55:11…
ElasticSearchUser
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Data type conversion using logstash grok

Basic is a float field. The mentioned index is not present in elasticsearch. When running the config file with logstash -f, I am getting no exception. Yet, the data reflected and entered in elasticsearch shows the mapping of Basic as string. How do…
Sagnik Sinha
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Regex in config for dynamic columns in logstash

I have the log file of which i have pasted two rows below: Nov 26 14:20:32 172.16.0.1 date=2014-11-26 time=14:18:37 devname=XXXXCCCFFFFF devid=XXXCCVVGFFDD logid=3454363464 type=traffic subtype=forward level=notice vd=root srcip=172.16.1.251…
Naresh
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Logstash and Grok filter failure

My log file has a single line (taken from the tutorial log file): 55.3.244.1 GET /index.html 15824 0.043 My conf file looks something like this: input { file { path => "../http.log" type => "http" } } filter { grok { type =>…
user1077071
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how to grep particulr field from logstash output

I am trying to grep only few fields from this output from logstash 1.repositories#create 2.\"repo\":\"username/reponame\" . please share your ideas to grep particular info from this outpput and assign this to another variable "message" => "<190>Nov…
bsd
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Analyzing delays from log files using logstash and kibana

I am new to the ELK stack and was hoping to use that to debug issues from log files. My requirement is to plot the time taken for a thread to process a task and return back to the pool. Basically the logs look like the following : 2014-10-31…
Anoop Gopalakrishnan
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Creating a combined S3 logfile that can be parsed by Logstash

I've written a script to continuously pull all my S3 bucket logfiles down to my Logstash server, so it can be parsed using the patterns in this pull request. Alas, given the script recreates the logfile from scratch instead of just appending to it,…
aendra
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grok regex parsing not matching a log. when specifying a group as optional, but not the last group

Example: info: 2014-10-28T22:39:46.593Z - info: an error occurred while trying to handle command: PlaceMarketOrderCommand, xkkdAAGRIl. Error: Insufficient Cash #userId=5 #orderId=Y5545 pattern: > %{LOGLEVEL:stream_level}:…
alonisser
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Grok multiline recipe?

I'm still pretty new to logstash parsing out a multiline log message still seems a bit intimidating but I'm hoping that for what I'm trying to do (aka, parse logstash logs) this is pretty tried and tested patterns and hoping someone might be able to…
ken
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How to search on a URL exactly in ElasticSearch / Kibana

I have imported an IIS log file and the data has moved through Logstash (1.4.2), into ElasticSearch (1.3.1) and then being displayed in Kibana. My filter section is as follows: filter { grok { match => ["message" ,…
Dominic Zukiewicz
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What is the last part in the grok match pattern?

I've noticed some people use the 3rd part in a grok matching predicate, like %{NUMBER:response_status:int} ^--- ?? It's obvious what first 2 mean, and I can guess that the 3rd one is an explicit type of the result, but I…
zerkms
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logstash - filter logs and send to different elasticsearch cluster

let's say I've got a stack like this: logstash-forwarder -> logstash -> elasticsearch -> kibana I wonder if it's possible to monitor a whole directory with logstash-forwarder and send the logs to different elasticsearch cluster, based on filters.…
Schnebdreleg
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Chaining grok filter patterns for logstash

I am trying to configure logstash to manage my various log sources, one of which is Mongrel2. The format used by Mongrel2 is tnetstring, where a log message will take the…
Philip O'Brien
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What is max_value size in logstash file output measured in ?

I went through the documentation of logstash but could not find answer to this. Could anyone enlighten what is the field max_value for file output of logstash measured in (bytes, MBs, GBs) ? It is going to be a major driving factor as I do not want…
user3195649
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How to avoid the creation of unwanted logstash index

I could see that some junk indexs are generating with the normal in logstash. Why?
Steve
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