I'm trying to parse the Zeek IDS log using telegraf and influxdb. In the logs that zeek uses, they are separated by tabs, but when telegraf reads these logs, it adds \t. I am not able to create a pattern to perform the separation of fields
Log Zeek:
1669666446.619248 CLod7M1SB6EGHAp50a fe80::a00:27ff:fe8d:4f7d 143 ff02::16 0 icmp - - - - OTH F F 0 - 1 96 00 -
Telegraf Debug:
2022-11-29T14:36:52Z D! [parsers.grok::tail] Grok no match found for: "1669666446.619248\tCLod7M1SB6EGHAp50a\tfe80::a00:27ff:fe8d:4f7d\t143\tff02::16\t0\ticmp\t-\t-\t-\t-\tOTH\tF\tF\t0\t-\t1\t96\t0\t0\t-"
Grok Debugger:
%{SYSLOGHOST:ts}\t%{WORD:uuid}
No Matches
I've already made several attempts at patterns but without success. my knowledge is basic
Related
The thirty-party equipment has different logs when a user use differnet commands .
EX:
log A
Jun 2 16:45:49 host-A; rule='a', type='a', pattern='a', actions_taken='a', event_data='a'
log b
Jun 2 16:52:19 host-A; event='bbb', user='sss', com='111'
They don't have the same field when users use differnet commands .
The gork can't only uses one pattern to parse log.
How can I set grok to solve this problem?
Use grok to parse everything up to the semi-colon, then use a kv filter to parse the rest.
I have a custom video server that outputs logs in the following format:
<12>May 18 10:35:53.551 myserver.com host:server: WARNING : call 117 (John Doe): video round trip time of 856 ms observed...
I need to be able to use grok in Logstash to create the following columns:
call -> 117
name -> John Doe
RTT -> 856ms
but I am new to Grok and Logstash. How can I make a start on this?
Grok pattern that will meet your requirement:
\<%{INT:serialno}\>%{SYSLOGTIMESTAMP:timestamp} %{HOSTNAME:hostname} %{WORD:data}\:%{WORD:data}\: %{LOGLEVEL:log-level} \: %{GREEDYDATA:logmsg} %{INT:call} \(%{GREEDYDATA:name}\)\: %{GREEDYDATA:logmsg} %{INT:RTT} %{WORD:unit} %{GREEDYDATA:logmsg}
You can test the grok pattern with any grok debugger. The one that I have used is https://grokdebug.herokuapp.com/
Here is the screenshot of the output:
I am trying to write a grok to analysis my logs.
Use logstash 7 to collect logs. But I failed writing grok after many attempts.
Log looks like this:
[2018-09-17 18:53:43] - biz_util.py [Line:55] - [ERROR]-[thread:14836]-[process:9504] - an integer is required
My Grok(fake):
%{TIMESTAMP_ISO8601 :log_time} - %{USERNAME:module}[Line:%{NUMBER:line_no}] - [%{WORD:level}]-[thread:%{NUMBER:thread_no}]-[process:%{NUMBER:process_no}] - %{GREEDYDATA:log}
Only the timestamp part is OK. The others failed.
that will work:
\[%{TIMESTAMP_ISO8601:log_time}\] - %{DATA:module} \[Line:%{NUMBER:line_no}\] - \[%{WORD:level}\]-\[thread:%{NUMBER:thread_no}\]-\[process:%{NUMBER:process_no}\] - %{GREEDYDATA:log}
you need to escap [
This will work,
[%{TIMESTAMP_ISO8601:log_time}] %{NOTSPACE} %{USERNAME:module} [Line:%{BASE10NUM:Line}] %{NOTSPACE} [%{LOGLEVEL}]%{NOTSPACE}[thread:%{BASE10NUM:thread}]%{NOTSPACE}[process:%{BASE10NUM:process}]
I am pretty new to Grok and I need to filter a line as the one below:
Dec 20 18:46:00 server-04 script_program.sh[14086]: 2017-12-20 18:46:00 068611 +0100 - server-04.location-2 - 14086/0x00007f093b7fe700 - processname/SIMServer - 00000000173d9b6b - info - work: You have 2 connections running
So far I just managed to get the following:
SYSLOGBASE %{SYSLOGTIMESTAMP:timestamp} (?:%{SYSLOGFACILITY} )?%{SYSLOGHOST:logsource} %{SYSLOGPROG}:
So I get all the date/timestamp details + program + process which is ok.
But that leaves me with the following remaining string:
2017-12-20 18:46:00 068611 +0100 - server-04.location-2 - 14086/0x00007f093b7fe700 - processname/SIMServer - 00000000173d9b6b - info - work: You have 2 connections running
And here I am struggling to break everything into chunks.
I have tried lot of combinations trying to split that based on the hyphen (-) but I am failing so far to do so..
So far I have been pretty much using as a guideline the following:
https://github.com/logstash-plugins/logstash-patterns-core/blob/master/patterns/grok-patterns
Any help/suggestions/tips on this please?
I am using graylog2 and as shown above, trying to use GROK for filtering my messages out..
Many thanks
I managed to get my filter fully done and working. so the solution is below:
SERVER_TIMESTAMP_ISO8601 %{YEAR}-%{MONTHNUM}-%{MONTHDAY}[T ]%{HOUR}:?%
{MINUTE}(?::?%{SECOND})?[T ]%{INT}[T ]%{ISO8601_TIMEZONE}?
SERVER_HOSTNAME \b(?:[0-9A-Za-z][0-9A-Za-z-]{0,62})(?:\.(?:[0-9A-Za-z][0-9A-Za-z-]{0,62}))*(\.?|\b)
SERVER_Unknown %{SERVER_HOSTNAME}[/]%{SERVER_HOSTNAME}
SERVER_Loglevel ([Aa]lert|ALERT|[Tt]race|TRACE|[Dd]ebug|DEBUG|[Nn]otice|NOTICE|[Ii]nfo|INFO|[Ww]arn?(?:ing)?|WARN?(?:ING)?|[Ee]rr?(?:or)?|ERR?(?:OR)?|[Cc]rit?(?:ical)?|CRIT?(?:ICAL)?|[Ff]atal|FATAL|[Ss]evere|SEVERE|EMERG(?:ENCY)?|[Ee]merg(?:ency)?)
SYSLOGBASE_SERVER %{SYSLOGTIMESTAMP:timestamp} (?:%{SYSLOGFACILITY} )?%{SYSLOGHOST:logsource} %{SYSLOGPROG}:[T ]%{SERVER_TIMESTAMP_ISO8601: timestamp_match}[T ]-[T ]%{SERVER_HOSTNAME:SERVER_host_node}[T ]-[T ]%{SERVER_Unknown:SERVER_Unknown}[T ]-[T ]%{SERVER_Unknown:service_component}[T ]-[T ]%{SERVER_HOSTNAME:process_code_id}[T ]-[T ]%{SERVER_Loglevel}[T ]-[T ]%{GREEDYDATA:syslog_message}
All the rest or regular expresions from GROK.
Many thanks
For some reason filebeat is not sending the correct logs while using the multiline filter in the filebeat.yml file. The log file im reading has some multiline logs, and some single lines. However, they all follow the same format by starting with a date. For an example, here is a couple lines:
2017-Aug-23 10:33:43: OutputFile: This is a sample message
2017-Aug-23 10:34:23: MainClass: Starting connection:
http.InputProcess: 0
http.OutPutProcess: 1
2017-Aug-23 10:35:21: OutputFile: This is a sample message 2
My Filebeat yml is:
- input_type: log
paths:
- /home/user/logfile.log
document_type: chatapp
multiline:
pattern: "^%{YYYY-MMM-dd HH:mm:ss}"
negate: true
match: before
For some reason when i see the filebeat logs hit elasticsearch, all of the logs will be aggragated into one log line, so it does not seem to be actually reading the file date by date. Can Anyone help? Thanks!
Use
pattern: "^%{YEAR}-%{MONTH}-%{MONTHDAY}"
The pattern you are currently using there is not a validly defined regex given the grok patterns.
You can test multiline patterns using the grokconstructor. I constructed this pattern from the grok-patterns predefined in logstash.