Been banging my head against the wall over this - started out with logstash and Grok 2 days ago and made a bit of progress but i've been stuck looking at this particular problem all evening.
I have the following lines of input from a log file being ingested into logstash.
'John Pence ':'decrease':-0.01:-1.03093: 0.96: 0.97
'Dave Pound':'increase':0.04:1.04000: 0.97: 0.93
With the following grok filter matches:
match => { "message" => "%{QS:name}:%{QS:activity}:%{BASE16FLOAT:Change}:%{BASE16FLOAT:Percentage}: %{BASE16FLOAT:CurrentPrice}: %{BASE16FLOAT:PreviousPrice}" }
match => { "message" => "%{QS:Name}:%{QS:Activity}:-%{BASE16FLOAT:Change}:-%{BASE16FLOAT:Percentage}: %{BASE16FLOAT:CurrentPrice}: %{BASE16FLOAT:PreviousPrice}" }
This produces the following output in Kibana:
As you can see - I can't get the negative numbers to display correctly, how would one correctly show the minus sign in a grok filter?
Would greatly appreciate some help!
You can simply use the NUMBER grok pattern instead of BASE16FLOAT
The following grok pattern works perfectly on your input:
grok {
"match" => {"message" => "%{QS:name}:%{QS:activity}:%{NUMBER:Change}:%{NUMBER:Percentage}: %{NUMBER:CurrentPrice}: %{NUMBER:PreviousPrice}"}
}
Related
(1/15/2018 3:00:32 AM)
Hi I have the above format for which I was trying to write grok pattern to seperate date, time, and AM/PM , Please help. I was using below pattern but still don't see the proper out put when create the index.
grok {
match => {
"message" => "%{MONTHDAY}/%{MONTHNUM}/%{YEAR}[T ]%{HOUR}:?%{MINUTE}(?::?%{SECOND})?%{ISO8601_TIMEZONE}?"
}
}
The first number is a month and the second is the day, since it's above 12. So you'll have to switch %{MONTHDAY} & %{MONTHNUM} like this:
"%{MONTHNUM}/%{MONTHDAY}/%{YEAR}[T ]%{HOUR}:?%{MINUTE}(?::?%{SECOND})?%{ISO8601_TIMEZONE}?"
Hi How to write a grok expression for the below log
[2017-03-25T00:00:07,137][WARN ]
match => { "message" => "\[%{TIMESTAMP_ISO8601:timestamp}/]/[%{LOGLEVEL:log-level}\s*\]" }
Is this correct , how to write space in grok ?
Thanks
%{SPACE} is that pattern that matches 0 or more spaces, which is very useful if you don't know (or care!) if there will be a space or not.
I use Grok filter in Logstash to break one long message into several fields.
The example Message: http://localhost:8080/MRLService/api/v1/reportNotes 11-24-2016 10:59:49 8ms country=AUS pesticide=ABA3000
filter: filter {
grok {match => {"log4j2_message" => "%{URIPATH:url} %{DATESTAMP:startTime} %{NUMBER:timeTaken}ms %{GREEDYDATA:parameters}"}}
}
it is working fine except the timetaken (8) is string type instead of number type I supposed,
Could anyone please tell how to make the timetaken field as number in Logstash?
Thanks,
Sean
The last is the type
{NUMBER:timeTaken:int}
or just convert the filed to int or float (not suggest due to this will lower performance then the first method)
mutate {
convert => [ "[geoip][coordinates]", "float"]
}
I am trying to take log data from a custom application that has a well defined format. I am trying to pick out certain pieces of the data using the grok filter, but I am not having any luck. Here is a sample log:
- System.Data.SqlClient.SqlException (0x80131904): Arithmetic overflow error converting IDENTITY to data type int.
Arithmetic overflow occurred.
What I would like to do is extract out the SqlException out of the string. Here is the grok that I am using:
grok{
match =>
{
"message" =>
[
"(?m)%{DATE:TIMESTAMP_DATE}%{SPACE}%{TIME:TIMESTAMP_TIME}%{SPACE}%{WORD:LOG_LEVEL}%{SPACE}(?<THREAD>[^\s]+)%{SPACE}(?<HOST>[^\s]+)%{SPACE}%{GREEDYDATA:MESSAGE}",
"(?<EXCEPTION>[.*]+)"
]
}
}
I have tried several different ways, but I guess I am not completely understanding the documentation. What I would expect to happen is all of the fields that I have extracts in the first set would include the result of the second set. In other words:
TIMESTAMP_DATE,TIMESTAMP_TIME,LOG_LEVEL,THREAD,HOST,MESSAGE,EXCEPTION
I am getting the other fields perfectly, it is just additional matching that I am missing. Any help would be appreciated. Thanks
If you specify multiple patterns grok by default only looks checks the patterns until the first match is encountered. If you want to match against both patterns regardless of whether the first one matched or not you can change the behaviour like that:
grok{
break_on_match => false
match =>
{
"message" =>
[
"(?m)%{DATE:TIMESTAMP_DATE}%{SPACE}%{TIME:TIMESTAMP_TIME}%{SPACE}%{WORD:LOG_LEVEL}%{SPACE}(?<THREAD>[^\s]+)%{SPACE}(?<HOST>[^\s]+)%{SPACE}%{GREEDYDATA:MESSAGE}",
"(?<EXCEPTION>[.*]+)"
]
}
}
Check out the docs under: https://www.elastic.co/guide/en/logstash/current/plugins-filters-grok.html#plugins-filters-grok-break_on_match
My log file contains different structures in a few lines, and I can not grok it, I don't know if we can test by lines or attribute, I'm still a beginner.
if you don't understand me I can give you some examples :
input :
id=firewall action=bloc type=web
id=firewall fw="ER" type=filter
id=firewall fw="Az" tz="loo" action=bloc
Pattern:
id=%{WORD:id} ...
I thought to add some patterns between ()?,
but i don't know exactly how to do it.
you can use this site to test it http://grokdebug.herokuapp.com/
Any help please? What should i do :(
Logstash supports key-value Values, take a look at http://logstash.net/docs/1.4.2/filters/kv.
Or you could use multiple match values:
grok {
patterns_dir => "./patterns"
match => [
"message", "%{BASE_PATTERN} %{EXTRA_PATTERN}",
"message", "%{BASE_PATTERN}",
"message", "%{SOME_OTHER_PATTERN}"
]
}
Not sure if I understood well your question but I will try to answer. I think the first thing you have to do is to parse the different fields from your input. Example of pattern to parse your first line input :
PATTERN %{NOTSPACE} %{NOTSPACE} %{NOTSPACE} (in $LOGSTASH_HOME/pattern/extra)
Then in your logstash configuration file :
filter {
grok {
patterns_dir => "$LOGSTASH_HOME/pattern"
match => [ "message" => "%{PATTERN}" ]
}
}
This will match your first line as 3 fields ("id=firewall" "action=bloc" "type=web") (you have to adapt it if you have more than 3 fields).
And the last thing you seem be looking for is splitting field (in key-value scheme) like id=firewall would become id => "firewall". This can be done with the kv plugin. I never used it but I recommend you the logstash docs here
If I did not understand you question, please be more clear.