Basically I was setting up an Elasticsearch-Logstash-Kibana (elk) stack for monitoring syslogs. Now I have to write the grok pattern for logstash.
Here's an example of my log:
May 8 15:14:50 tileserver systemd[25780]: Startup finished in 29ms.
And that's my pattern (yet):
%{SYSLOGTIMESTAMP:zeit} %{HOSTNAME:host} %{SYSLOGPROG:program}
Usually I'm also using %{DATA:text} for the message but it just works on the link below.
I'm using Test grok patterns to test my patterns and these 3 work fine but there's the colon (from after PID) in front of the message and I don't want it to be there.
How do I get rid of it?
try this:
%{SYSLOGTIMESTAMP:zeit} %{HOSTNAME:host} %{GREEDYDATA:syslog_process}(:) %{GREEDYDATA:message}
Related
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:
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.
Spent the past hour trying to setup a grok filter for logstash. Working with the Grok Debugger everything's good until I get to the timestamp. Grok chokes on the four digit year.
Here is a logfile entry as its sent to logstash:
Jul 8 11:54:29 192.168.1.144 1 2016-07-08T15:55:09.629Z era.somedomain.local ETAServer 1755 Syslog {"event_type":"Threat_Event","ipv4":"192.168.1.118","source_uuid":"7ecab29a-7db3-4c79-96f5-3946de54cbbf","occured":"08-Jul-2016 15:54:54","severity":"Warning","threat_type":"trojan","threat_name":"HTML/Agent.V","scanner_id":"HTTP filter","scan_id":"virlog.dat","engine_version":"13773 (20160708)","object_type":"file","object_uri":"http://malware.wicar.org/data/java_jre17_exec.html","action_taken":"connection terminated","threat_handled":true,"need_restart":false,"username":"DOMAIN\username","processname":"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe"}
What I'm having trouble with is the first part before the JSON data. The first part of my grok statement:
%{MONTH}\ %{MONTHDAY}%{SPACE}%{TIME}%{SPACE}%{IPV4}%{SPACE}%{NUMBER}%{SPACE}
works fine correctly identifying everything up to the number '1' just before the year in the timestamp. The problem is when I add the following:
%{MONTH}\ %{MONTHDAY}%{SPACE}%{TIME}%{SPACE}%{IPV4}%{SPACE}%{NUMBER}%{SPACE}%{TIMESTAMP_ISO8601}
then I get "No Matches" in the grok debugger. Messing around with it a bit more it appears that problem is somewhere between the number '1' and the first two digits of the year in the timestamp since %{TIMESTAMP_ISO8601} only uses a two digit year.
Any suggestions or help would be greatly appreciated.
Digging a little deeper into Regex and Grok looks like I figured it out. I replaced %{TIMESTAMP_ISO8601} with:
([^\d\d]%{YEAR})[./-]%{MONTHNUM}[./-]%{MONTHDAY}[T ]%{HOUR}:?%{MINUTE}(?::?%{SECOND})?%{ISO8601_TIMEZONE}
and it worked perfectly. The key was the [^\d\d] in front of %{YEAR}
I'm trying to figure out how it works logstash and grok to parse messages. I have found that example ftp://ftp.linux-magazine.com/pub/listings/magazine/185/ELKstack/configfiles/etc_logstash/conf.d/5003-postfix-filter.conf
which start like this:
filter {
# grok log lines by program name (listed alpabetically)
if [program] =~ /^postfix.*\/anvil$/ {
grok{...
But don't understand where [program] is parsed. I'm using logstash 2.2
That example are not working in my logstash installation, nothing is parsed.
I answer myself.
The example assumes that the events come from syslog (in that case the field "program" are present), instead filebeats which is what I'm using to send the events to logstash.
To fix-it:
https://github.com/whyscream/postfix-grok-patterns/blob/master/ALTERNATIVE-INPUTS.md
We are in the process of capturing the logstash
2016-01-07 13:12:36,718 82745269 [http-nio-10180-exec-609] 8ca2b394-f435-4376-9a16-8be44ad437b9 - entry:"dummy-AS-1.1"
we are having logs like this,We want how to match the messages .Once matched we want to remove 82745269 and [http-nio-10180-exec-609].Pls help
How do you match them? With the grok filter.
How do you make a grok pattern? Slowly, using the debugger.
Maybe an introduction would help.