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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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Grok pattern for data separated by pipe

I have a logfile in which the data is separated by a pipe symbol. "|". An example is below. Does anyone know how to write a GROK pattern to extract it for logstash? 2014-01-07 11:58:48.7694|LOGLEVEL|LOGSOURCE|LOGMESSAGE
CodeRunner
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Logstash replace @timestamp with syslog date

I'm a bit confused. I'm trying to pull out the syslog date (backfilling the logstash) and replace the @timestamp with it. I've tried almost everything. This is my filter filter { if [type] == "syslog" { grok { match => { "message" =>…
user3070418
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Drop log line containing hash character

In my Logstash shipper I want to filter out lines commented with the hash character: #This log row should be dropped. But one this should not. I was able to use grep filter, but as it is discouraged (going to be decommissioned), I'm trying to get a…
Jonas Byström
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Using a case insensitive Logstash filter

How do I change this Logstash filter to be case insensitive? filter { if "foo" in [message] { mutate { add_field => { "Alert_level" => "5" }} } } I could not get it to work as shown in https://github.com/elastic/logstash/pull/3636
Jam
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Converting date format to YYYY-MM-DD from YYYY/MM/DD HH:MM:SS format in Logstash for nginx error logs

I am having nginx error logs of the below form:- 2015/09/30 22:19:38 [error] 32317#0: *23 [lua] responses.lua:61: handler(): Cassandra error: Error during UNIQUE check: Cassandra error: connection refused, client: 127.0.0.1, server: , request:…
tuk
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Logstash Grok filter for uwsgi logs

I'm a new user to ELK stack. I'm using UWSGI as my server. I need to parse my uwsgi logs using Grok and then analyze them. Here is the format of my logs:- [pid: 7731|app: 0|req: 357299/357299] ClientIP () {26 vars in 511 bytes} [Sun Mar 1 07:47:32…
Praful Bagai
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Getting IP address of Logstash-forwarder machine

I've setup the Elasticsearch, Logstash, Kibana log viewing tools on my systems. There are 2 machines in my configuration now (Amazon EC2 instances): 54.251.120.171 - Logstash-server where ELK is installed 54.249.59.224 - Logstash-forwarder - sends…
chinmay
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AWS Glue Grok Pattern, timestamp with milliseconds

I need to define a grok pattern in AWS Glue Classifie to capture the datestamp with milliseconds on the datetime column of file (which is converted as string by AWS Glue Crawler. I used the DATESTAMP_EVENTLOG predefined in AWS Glue and tried to add…
ylcnky
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How do I refer to a regex group inside a custom grok pattern?

I want to add fields for specific URI params in my log lines here is an example log line: 2017-03-12 21:34:36 W3SVC1 webserver 1.1.1.1 GET /webpage.html param1=11111¶m2=22222¶m3=¶m4=4444444 80 - 2.2.2.2 HTTP/1.1 Java/1.8.0_121 - -…
red888
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LogBack - LogStash - Add properties in the logback and send them to Logstash

I'm using Logback and Logstash in a SpringBoot application. In the logback.xml I have a property with the name of the service, and is like:
AleGallagher
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Convert all fields ending with "id" to integer using convert in mutate?

Currently I am doing something like this in my logstash config file : filter { ... mutate { ... convert => { "blahId" => "integer" "blahblahId" => "integer" ... ... …
Karup
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How to map nested JSON in Log-stash HTTP Output

I am using Logstash to output JSON message to an API. I am using "mapping" attribute to map my message. See, following piece of my shipper configurations. output { stdout { } http { url => "http://localhost:8087/messages" …
omer khalid
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Grok - parsing optional fields

I've got data coming from kafka and I want to send them to ElasticSearch. I've got a log like this with tags: APPLI_A|PRF|ENV_1|003 I'm trying to parse it with grok using grok…
David
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logstash if statement within grok statement

I'm creating a logstash grok filter to pull events out of a backup server, and I want to be able to test a field for a pattern, and if it matches the pattern, further process that field and pull out additional information. To that end I'm embedding…
michaelcoyote
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conditional matching with grok for logstash

I have php log of this format [Day Mon DD HH:MM:SS YYYY] [Log-Type] [client ] : [Day Mon DD HH:MM:SS YYYY] [Log-Type] [client ]…
AbhinavK
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