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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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Match everything that comes before a character, if there is one (Regex)

Good evening guys! I wrote a pattern that catches resource: X-ray Tracing ID : Root=%{DATA:resource} In the log excerpt below: (d9be2aec-d683-4d9b-8d3c-428f1f339416) X-ray Tracing ID : Root=1-612dd69a-4b2951db368113005fb367ce However, I am…
Dawid
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How do you find a quoted string with specific word in a log message using grok pattern

I have a log message from my server with the format below: {"host":"a.b.com","source_type":"ABCD"} I have this grok pattern so far but it accepts any word in double quotation. \A%{QUOTEDSTRING}:%{PROG} how can I change "QUOTEDSTRING" that only…
EStech
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Logstash log time and date parsing

Hello I have below log 12-Apr-2021 16:11:41.078 WARNING [https-jsse-nio2-8443-exec-3] org.apache.catalina.realm.LockOutRealm.filterLockedAccounts An attempt was made to authenticate the locked user [user1] I am trying to build a pattern for these…
Hazal Altin
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logstash log parsing with regex and grok

Hello I have below logs 12-Apr-2021 16:11:41.078 WARNING [https-jsse-nio2-8443-exec-3] org.apache.catalina.realm.LockOutRealm.filterLockedAccounts An attempt was made to authenticate the locked user [uv19nb] 12-Apr-2021 16:01:01.505 FINE…
Hzl Aysen
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How to remove particular lines from input file if starts with special character in logstash

I am trying to remove all the lines starting from < in my input file in logstash. I tried below filter but no success. I am new to ELS stack, please pardon if it has already answered. Sample Input lines Thread #1: t@-1680123584, lwp=22843,…
Ankit Sachan
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Logstash parse data within square brackets

I am trying to parse the following log-data: [2016-Nov-12 13:15:17] [prog.HELP]: Some sample text, that causes some troubles. Please use module.html. Watch: https://wiki.buybite.org/display/FOP/Dash+mash+dust [] [] When I try to parse, I cannot…
same fame name lame
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_grokparsefailure Tag in all parsed logs with multiple grok filter

I am trying to parse minecraft log with Elastic Stack and I'v faced a very strange problem (likely strange for me!) all line of my log get parsed correctly but I got _grokparsefailure tag in everyone of them. my logstash pipeline config is…
Mohammad Amin
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Install Logstash error JAVA (OpenJDK 64-Bit Server VM warning)

I have followed the official documentation and written the following: # Update repository sudo apt-get update # Install necessary things. Like SSL support and JDK sudo apt-get install apt-transport-https default-jdk -y # Download and install the…
redxlus
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In LogStash, how remove any json/xml field larger than specific size

In few words, I have this stack in our company for our corporate logs: All Request/Response Log Files -> Filebeat -> Kafka -> Logstash - ElasiicSearch Pretty common approach. Nevertheless, there might exist in unexpected request/response format a…
Jim C
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How to get only the first match of a regex Grok filter

goal I want to retrieve only this string "14" from this message with a logstash Grok 3/03/0 EE 14 GFR 20 AAA XXXXX 50 3365.00 this is my grok code grok{ match => { field1 => [ "(?\d{0}\s\d{1,3}\s{1})" …
Vince
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Fields parsed from log path not added in logstash

I'm parsing multiple log files with logstash - and want to add fields based on the path of the files to my output. Here are the relevant parts of the config file: input { file { path => "/mnt/logs/**/console-20200108*.log" type =>…
Aleks G
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Logstash grok multiple match

Trying to extract some fields from the msgbody field using grok , but only the first field in the grok gets extracted. interested Fields - corId, controller, httpStatusText and uri (These fields may not be present in every log event) Sample Data…
navd
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How to get parts of Filebeat source filename in Logstash

I have an instance of Filebeat (version 7.5.0, running on a Windows Server) monitoring a local folder for log files, and sending this data onwards to Logstash (version 7.5.0, running in a Docker continer). In Logstash I would like to extract one of…
Julian
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Match version number parts in grok

I want to split a version string (e.g. 2.3.5) into three fields(major.minor.patch) using the grok filter. What I tried: %{NUMBER:major}.%{NUMBER:minor}.%{NUMBER:patch} Result from Grok debugger: No Matches What I expected: { major: 2, …
Wenyi Li
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Repeat grok pattern

I have a message like this "Something word word 20/07/2018 word word 25/04/2015".How can I use a grok pattern or a customer pattern to take all dates and add them into a new field which is an array? I tried with a custom regex pattern but when I…
Madalin
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