We are new to using logstash and are parsing log4net messages. In the message field currently we have a string output as
Some random application name - Some random message
I tried to use the
gsub => ["message", "-", "App Name"] but it just changed the string and not add it as a new field. What is the best way to get the application name as a new field and remove it from the message field?
Thank you in advanced for your help.
How about grok{} with this pattern:
%{DATA:app} - %{GREEDYDATA:otherStuff}
Related
I am using logstash to monitor my production server logs, but it throws all logs from info to errors, what I want is that it can only pick errors from log file and throw it on logstash kibana view.
After parsing your log using grok you can use logstash conditionals to check if loglevel (or whatever is your field name) equals to ERROR. If its true forward it to your output plugin,
output {
if [loglevel] == "ERROR"{ # Send ERROR logs only
elasticsearch {
...
}
}
}
If you are using filebeat to ship logs, you can use Processors, to send only logs that contains ERROR.
The contains condition checks if a value is part of a field. The field
can be a string or an array of strings. The condition accepts only a
string value.
For example, the following condition checks if an error is part of the
transaction status:
contains:
status: "Specific error"
Depends on your log format, you might be able to use one of the many supported conditions by filebeat processors,
Each condition receives a field to compare. You can specify multiple
fields under the same condition by using AND between the fields (for
example, field1 AND field2).
For each field, you can specify a simple field name or a nested map,
for example dns.question.name.
You can read more about Conditions here
I created a filter to break apart our log files and am having the following issue. I'm not able to figure out how to save the parts of the "message" to their own field or tag or whatever you call it. I'm 3 days new to logstash and have had zero luck with finding someone here who knows it.
So for an example lets say this is your log line in a log file
2017-12-05 [user:edjm1971] msg:This is a message from the system.
And what you want to do is to get the value of the user and set that into some index mapping so you can search for all logs that were by that user. Also, you should see the information from the message in their own fields in Kibana.
My pipeline.conf file for logstash is like
grok {
match => {
"message" => "%{TIMESTAMP_ISO8601:timestamp} [sid:%{USERNAME:sid} msg:%{DATA:message}"
}
add_tag => [ "foo_tag", "some_user_value_from_sid_above" ]
}
Now when I run the logger to create logs data gets over to ES and I can see the data in KIBANA but I don't see foo_tag at all with the sid value.
How exactly do I use this to create the new tag that gets stored into ES so I can see the data I want from the message?
Note: using regex tools it all appears to parse the log formats fine and the log for logstash does not spit out errors when processing.
Also for the logstash mapping it is using some auto defined mapping as the path value is nil.
I'm not clear on how to create a mapping for this either.
Guidance is greatly appreciated.
I'm new at ELK-stack and want to add a field in kibana(discover) interface that matches a specific part of the message text (one word or a sentence).
for example:
I want to have a field in the left side that matches the word 'installed' in the message text.
Which filter in logstash should I use and how does it look like?
How about grok{}, which applies a regular expression to your input message and can make new fields?
Thanks for the answer. I used grok as following to match how many users created new accounts.
grok {
match => [ "message", "(?<user_created>(user_created))"]
break_on_match => false
}
Anyway I found out the problem is that Kibana is showing old logs and doesn't care what I do in the logstash config file! still can't find out why!
hello I am newer to the logstash. when I am trying to parse the #message field in logstash, that is output from nxlog. can anyone please suggest me how to use regex in grok to parse the below #message field.
"The audit log was cleared.\r\nSubject:\r\n\tSecurity
ID:\tS-1-5-21-1753799626-3523340796-3104826135-1001\r\n\tAccount
Name:\tJhon\r\n\tDomain Name:\tJactrix\r\n\tLogon ID:\t1x12325"
and I am using following grok pattern to parse
match => { "%{#message}" =>
"%{GREEDYDATA:msg}\r\nSubject:%{DATA}\r\n\tSecurity
ID:\t%{USERNAME}\r\n\tAccount Name:%{GREEDYDATA}\r\n\tDomain
Name:\t%{GREEDYDATA}\r\n\tLogon ID:\t%{GREEDYDATA}" }
Thank you
as a starter you could try the following pattern:
%{GREEDYDATA:msg}.*Subject:%{GREEDYDATA:subject}.*Security ID:%{GREEDYDATA:securityId}.*Account Name:%{GREEDYDATA:accountName}Domain Name:%{GREEDYDATA:domainName}Logon ID:%{GREEDYDATA:logonID}
Then try to refine the patterns depending on the structure of your log-files (e.g. accountName might be %{WORD} or ....). You can use http://grokdebug.herokuapp.com/ to test your pattern. A list of predefined patterns is found here: https://github.com/logstash-plugins/logstash-patterns-core/tree/master/patterns
I have many messages like this:
Error GetMilesFromLocationService(Eastvale, CA,Yorkshire, NY,1561517,19406,True.)
The problem is that they are unique because of the city names. In a Kibana Visualization, is it possible group these into "Error GetMilesFromLocationService" messages? Here's an example of my metrics visual. Ideally, they would all be in one row.
These could be easily grouped by a regex match.
Of course, I could add a new field with Logstash, but if Kibana is able to do this, I'll be happy.
Thanks!
Use a grok filter to parse the message and extract fields from it. At the very least you'll want to extract "Error GetMilesFromLocationService" into a separate field (perhaps error_type?) to allow aggregation. Or perhaps it would be better to extract "GetMilesFromLocationService" into a function field? Without knowing the structure of your log messages giving firm advice is hard.
This grok filter extracts an error_type field:
filter {
grok {
match => [
"message",
"^(?<error_type>Error %{WORD})"
]
}
}