Hi I am new to logstash and grok filtering, I have a sample log like this:
1/11/2017 12:00:17 AM :
Error thrown is:
No Error
Request sent is:
webMethod:GetOSSUpdatedOrderHeader|appCode:OSS|regionCode:EMEA|orderKeyList:|lastModifedDateTime:1/10/2017 11:59:13 PM|
I want to filter out the line separator which is a line full of ** (the last line)
Also when I want to be able to capture entire line including ":" in one field. For example in the above log, webMethod:GetOSSUpdatedOrderHeader has to be captured in one field in my grok pattern. Is there a way to achieve this?? TIA. Please refer the attached image for the sample log message
A few tips:
Photos of logs are not a good way to offer someone an example, copy and paste the log
The Grok Debugger is a great way of building your own grok patterns
This should work for the sample log line you pasted in:
%{NOTSPACE:webMethod}\|%{NOTSPACE:appCode}\|%{NOTSPACE:regionCode}\|%{NOTSPACE:orderKeyList}\|%{NOTSPACE:lastModifedDateTime}
However, what you requested, probably isn't quite what you want, as you just want the field content in the result, not the name of the field as well. This should give you more sensible results:
webMethod:%{NOTSPACE:webMethod}\|appCode:%{NOTSPACE:appCode}\|regionCode:%{NOTSPACE:regionCode}\|orderKeyList:(?:%{NOTSPACE:orderKeyList}|)\|lastModifedDateTime:%{NOTSPACE:lastModifedDateTime}
You would then want to process the lastModifedDateTime field with the date filter to get the date stamp in a format logstash can save to.
Related
I am quite new to the magic world of Grok. Any help will be thankful.
I need to apply filter for the following file.
The file contains logs
The grok pattern i am trying to use
(?m)(?<Rabbit_datetimeTMP>.{23}) %{LOGLEVEL:Level}.messageid:\s%{BASE10NUM:Id}
<%{GREEDYDATA:Data}>
I need to grok the datetime logelevel message id and the first line of xml(</Xml-fragment xmlns: sol ="http://www.rabitmq.com/was/xml/complte" xmlns:ns2="http://www.rabitmq.com/was/xml/complte">) . starts with< and ends with >.
unfortunately its taking the entire xml format.output
I am using ELK stack, so using file input plugin in logstash i am working on it
at first i used file*.txt to match with file pattern
later i used masterfile.txt as a single file which has the data of all matching patterns
and now i am going back to file*.txt , but here i see the problem- I am seeing the data on kibana which is the date after the file*.txt is replaced with masterfile.txt but not the history,
I feel like i must understand the behavior of sincedb logstash here
also a possible solution to get the history data
Logstash stores information about the position of the last byte read in the file that contains the logs with sincedb_path. During the execution, Logstash starts reading the input file from the mentioned position.
Take into account 'start_position' and the name of the index ( Logstash -> output) if you want to create a new index with different logs.
https://www.elastic.co/guide/en/logstash/current/plugins-inputs-file.html#plugins-inputs-file-sincedb_path
Can anyone give the logstash grok pattern for below lines. I want to take only timestamp alone.
[2017-08-19T12:47:43,822][INFO][logstash.agent] Successfully started Logstash API endpoint {:port=>9600}
[2017-08-19T12:49:47,213][WARN][logstash.agent] stopping pipeline {:id=>"main"}
I'm not sure to understand what you want but here are two possible solutions:
[%{GREEDYDATA:date1}][%{LOGLEVEL:debugLevel}][%{USERNAME:agentName}] %{GREEDYDATA:message} [%{TIMESTAMP_ISO8601:date2}][%{LOGLEVEL:debugLevel2}][%{USERNAME:agentName2}] %{GREEDYDATA:message}
This grok pattern will extract all information that you have in your log, then you decide if you want to use date1 or date2 field
%{GREEDYDATA:trash}[%{TIMESTAMP_ISO8601:date}]%{GREEDYDATA:trash}
This one will only return the second date of your log
Hope it helped !
If you only need the timestamp, this should do:
\[%{TIMESTAMP_ISO8601:date}\]
Results for your two loglines on https://grokconstructor.appspot.com:
If you want to match the whole pattern something like this may fit your needs:
\[%{TIMESTAMP_ISO8601:date}\]\[%{LOGLEVEL:loglevel}\]\[%{GREEDYDATA:agent}\] %{GREEDYDATA:message}
Results:
I am new to Logstash filter and going through different blogs and links to understand in detail. I have few questions which are still unanswered.
. If my log file has different log pattern e.g.
2017-01-30 14:30:58 INFO ThreadName:33 - {"t":1485786658088,"h":"abcd1234", "l":"INFO", "cN":"org.logstash.demo", "mN":"getNextvalue", "m":"fetching next value"}
2017-01-30 14:30:58 INFO AnotherThread:33 -my log pattern is different
I have below filter which is successfully filtering line 1 of the log
grok
{
match => [ "message", "%{TIMESTAMP_ISO8601:LogDate} %{LOGLEVEL:loglevel} %{WORD:threadName}:%{NUMBER:ThreadID} - %{GREEDYDATA:Line}" ]
}
json
{
source => "Line"
}
what will happen with the lines which can not be filtered using filter pattern?
Is there any way to capture all the lines which were not filtered and send to elasticSearch ?
Is there any good reading material where I can read about Input, Filter, Output plugins with the examples ?
To answer your questions:
The lines which cannot be filtered using grok would end up in a
grok_parsefailure. Make sure you handle it by dropping the lines
which don't actually match the filter criteria.
As far as I know you can't capture them separately and push it to ES. Maybe for this, you can have multiple grok patterns so that you can filter it out and send it to different ES indices thereafter.
I've added the links in the comment above.
This SO could come in handy. Hope it helps!
As #darth_vader points out, you'll get a "grok_parsefailure" tag on each document that doesn't match your pattern(s) in a grok{} filter. However, how you handle this failure is up to you.
By default, all the events will fall through to your output{} section, which presumably would send them to elasticsearch. You could also have a conditional output{} section, which sent parsed logs to one output and unparsed logs to another (a file{} output, or a different index, or...).
As for examples, the official doc tends to include incomplete fragments (at best), so you're probably going to find better examples in random internet blogs.
I am using Logstash (with Kibana as the UI). I would like to extract some fields from my logs so that I can filter by them on the LHS of the UI.
A sample line from my log looks like this:
2013-07-04 00:27:16.341 -0700 [Comp40_db40_3720_18_25] client_login=C-316fff97-5a19-44f1-9d87-003ae0e36ac9 ip_address=192.168.4.1
In my logstash conf file, I put this:
filter {
grok {
type => "mylog"
pattern => "(?<CLIENT_NAME>Comp\d+_db\d+_\d+_\d+_\d+)"
}
}
Ideally, I would like to extract Comp40_db40_3720_18_25 (the number of digits can vary, but will always be at least 1 in each section separated by _) and client_login (can also be client_logout). Then, I can search for CLIENT_NAME=Comp40... CLIENT_NAME=Comp55, etc.
Am I missing something in my config to make this a field that I can use in Kibana?
Thanks!
If you are having any difficulty getting the pattern to match correctly, using the Grok Debugger is a great solution.
For your given problem you could just separate out your search data into another variable, and save the additional varying digits in another (trash) variable.
For example:
(?<SEARCH_FIELD>Comp\d+)%{GREEDYDATA:trash_variable}]
(Please use the Grok Debugger on the above pattern)