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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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Getting Logstash to treat syslog message string as JSON if applicable

I have a variety of shell scripts from which I run a logger line for syslog with a message in json format: printf '{"task_id": "%s", "seconds": %f, "success": %s}' ${task_id} ${num_seconds} ${success_bool} This gets the following output in…
Loic Duros
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logstash filter for Java logs

I am trying to write a logstash filter for my Java logs so that I can insert them into my database cleanly. Below is an example of my log format: FINE 2016-01-28 22:20:42.614+0000 net.myorg.crypto.CryptoFactory:getInstance:73:v181328 AppName :…
cookandy
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how do you create filters on time series data in logstash

there is a file that has entries like this: 2016-01-22 10:01:44.043, cash.read, 93.67088 2016-01-22 10:01:44.043, cahhe.size, 79 There are 1000's of metrics. Can somebody guide me through creating filter to create…
user1471980
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Matching a field (exception name) on the second line in a multiline event

I have multiline Log4J logs. The lines after the first are optional. The first line contains the log message and after that is the stacktrace. I want to extract the top exception class name on a stacktrace and it is the first part on the second…
ilhami visne
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Grok Parse Failure on Custom Log Format and regex in logstash

I have a custom log format ,i am new to it so trying to figure out how it works . It is not getting parsed in logstash .Can someone help to identify the issue. Logformat is as follows {u'key_id': u'1sdfasdfvaa/sd456dfdffas/zasder==', u'type':…
userguy
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HaProxy debug correct but but log error

I have got grok filter for my haproxy: %{SYSLOGTIMESTAMP:syslog_timestamp} %{IPORHOST:syslog_server} %{SYSLOGPROG}: %{IP:client_ip}:%{INT:client_port} \[%{HAPROXYDATE:accept_date}\] %{NOTSPACE:frontend_name}…
Mateusz Chudy
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How to get first char of a message in logstash filter

I would like to get the firs char of the message in order to apply either xml or json filter but I don't even know how to start ``` filter { if [type]=="mom_rubens" { if [message] = "<*" { xml { source => "message" …
glmrenard
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Logstash filter config is not detected

I use elk (elasticsearch, logstash and kibana) in docker. In logstash I have got input.conf and output.conf. All works fine, but I don't add any grok filters.. If I try add it to input.conf or create new file "filter.conf" but logstash don't see…
Mateusz Chudy
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Data not loading in kibana

I have started ElasticSearch, Logstash (3 conf files - input file, filter file and output file) and kibana server. The input file : input { file { path => "/home/zakir/Downloads/access.log" start_position => "beginning" } } The filter…
Soundarya Thiagarajan
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How to filter JSON data from a log4j file using logstash?

I have a log file such as the following. 2014-12-24 09:41:29,383 INFO c.t.t.a.c.LoginController.getCSRFToken [http-bio-8080-exec-4] in getCSRFToken 2014-12-24 09:41:29,383 DEBUG c.t.t.a.c.LoginController.getCSRFToken [http-bio-8080-exec-4] CSRFToken…
Mishal Harish
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How to add ip address of machine to field in logstash?

Logstash returns hostname of the machine in the field "host". All our servers have same host name, So it is difficult to differentiate data from servers. it is not possible to change host name of server because we use amazon AME servers. Is it…
Naveedh
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Logstash grok filter not matching

I have some troubles filtering my logs using logstash because my pattern only works in the debugger FilterString 127.0.0.1 - - [06/Jan/2016:15:43:41 +0000] "GET /index.php/banner/ajax/load/?sections=&_=1452095017076 HTTP/1.1" 200 74…
xhallix
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Logstash - Syntax for a grok mutate gsub to replace backslashes by empty string

I have problem with combination of Oracle SQL statement and logstash' automatic escaping characters like \ and ". In SQL statement I have defined i.e.: to_char(milliseconds_to_date(m.originationtime),'yyyy-mm-dd\"T\"hh24:MI') But in elastic search…
Reddy SK
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How to group logs messages in logstash using grok?

[25-Dec-2015 08:06:45] 0:: users to chek for delete [25-Dec-2015 08:08:44] 0:: users to chek for delete [25-Dec-2015 08:10:44] 3:: users to chek for delete [25-Dec-2015 08:10:44] Expected response code 200, got 404 { "error": { …
Naveedh
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Parse log file of json using logstatsh

I have the following json object logs as following in a log…
pavan
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