I'm learning how to use the grok plugin. I have a message string like so
"type=CRYPTO_SESSION msg=audit(111111.111:111111): pid=22730 uid=0 auid=123 ses=123 subj=system_u:system_r:sshd_t:a1-a1:a1.a1234 msg='op=xx=xx cipher=xx ksize=111 mac=xx pfs=xxx spid=111 suid=000 rport=000 laddr=11.11.111.111 lport=123 exe=\"/usr/sbin/sshd\" hostname=? addr=11.111.111.11 terminal=? res=success'"
I'd like to extract the fields laddr, addr, and lport. I created a patterns directory with the following structure
patterns
|
-- laddr
|
-- addr
My filter is written like so
filter {
grok {
patterns_dir => ["./patterns"]
match => { "messaage" => "%{LADDR:laddr} %{ADDR:addr}"}
}
}
I was expecting to extract at least laddr and addr. I get matches using https://grokdebug.herokuapp.com/. With these patterns
(?<laddr>\b(laddr=\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\b)
(?<addr>\b(addr=\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\b)
but the configuration fails to compile. I'm just going off of these docs: https://www.elastic.co/guide/en/logstash/current/plugins-filters-grok.html. I've also tried using a kv filter the issue that I run into when I try to use something like
filter{
kv {
value_split => "="
}
}
I end up with msg field showing up twice. I'd really like to figure out how to get the properties from this string. Any help would be greatly appreciated.
I think its field split :
filter {
kv {
field_split => "&?"
}
}
Did you try this, are you getting any error messages?
I´m trying to extract the number of ms in this logline
20190726160424 [INFO]
[concurrent/forasdfMES-managedThreadFactory-Thread-10] -
Metricsdceptor: ## End of call: Historirrtory.getHistrrOrder took 2979
ms
The problem is, that not all loglines contain that string
Now I want to extract it optionally into a duration field. I tried this, but nothing happend .... no error, but also no result.
grok
{
match => ["message", "(took (?<duration>[\d]+) ms)?"]
}
What I´m I doing wrong ?
Thanks guys !
A solution would be to only apply the grok filter on the log lines ending with ms. It can be done using conditionals in your configuration.
if [message] =~ /took \d+ ms$/ {
grok {
match => ["message", "took %{NUMBER:duration} ms"]
}
}
I cannot explain why, but it works if you anchor it
grok { match => { "message" => "(took (?<duration>\d+) ms)?$" } }
I try to match the loglevel of a log file with a grok filter, but still getting a _grokparsefailure. The problem is maybe with the space between [ and the log level.
example of log: 2017-04-21 10:12:03,004 [ INFO] Message
my filter:
filter {
grok {
match => {
"log.level" => "\[ %{LOGLEVEL:loglevel}\]"
}
}
}
I also tried some other solutions without success:
"\[ *%{LOGLEVEL:loglevel}\]"
"\[%{SPACE}%{LOGLEVEL:loglevel}\]"
Thanks in advance for your help
The issue is with the option match in your filter: this option is a hash that tells the filter which field to look at and which field to look at.
Your regex is fine (you can check with http://grokconstructor.appspot.com/do/match), the issue is with the field name; it should be message.
So in your case, your filter should look like this:
grok {
match => {
"message" => "\[ %{LOGLEVEL:loglevel}\]"
}
}
The point is the default field is message and you need to match all the string
filter {
grok {
match => {
"message" => "%{TIMESTAMP_ISO8601:logDate} \[ %{LOGLEVEL:loglevel}\]%{GREEDYDATA:messages}"
}
}
}
I am using Logstash to parse a log file. A sample log line is shown below.
2011/08/10 09:51:34.450457,1.048908,tcp,213.200.244.217,47908, ->,147.32.84.59,6881,S_RA,0,0,4,244,124,flow=Background-Established-cmpgw-CVUT
I am using following filter in my confguration file.
grok {
match => ["message","%{DATESTAMP:timestamp},%{BASE16FLOAT:value},%{WORD:protocol},%{IP:ip},%{NUMBER:port},%{GREEDYDATA:direction},%{IP:ip2},%{NUMBER:port2},%{WORD:status},%{NUMBER:port3},%{NUMBER:port4},%{NUMBER:port5},%{NUMBER:port6},%{NUMBER:port7},%{WORD:flow}" ]
}
It works well for error-free log lines. But when I have a line like below, it fails. Note that the second field is missing.
2011/08/10 09:51:34.450457,,tcp,213.200.244.217,47908, ->,147.32.84.59,6881,S_RA,0,0,4,244,124,flow=Background-Established-cmpgw-CVUT
I want to put a default value in there in my output Json object, if a value is missing. how can I do that?
Use (%{BASE16FLOAT:value})? for second field to make it optional - ie. regex ()? .
Even if the second field is null the grok will work.
So entire grok look like this:
%{DATESTAMP:timestamp},(%{BASE16FLOAT:value})?,%{WORD:protocol},%{IP:ip},%{NUMBER:port},%{GREEDYDATA:direction},%{IP:ip2},%{NUMBER:port2},%{WORD:status},%{NUMBER:port3},%{NUMBER:port4},%{NUMBER:port5},%{NUMBER:port6},%{NUMBER:port7},%{WORD:flow}
Use it in your conf file. Now, if value field is empty it will omit it in response.
input {
stdin{
}
}
filter {
grok {
match => ["message","%{DATESTAMP:timestamp},%{DATA:value},%{WORD:protocol},%{IP:ip},%{NUMBER:port},%{GREEDYDATA:direction},%{IP:ip2},%{NUMBER:port2},%{WORD:status},%{NUMBER:port3},%{NUMBER:port4},%{NUMBER:port5},%{NUMBER:port6},%{NUMBER:port7},%{WORD:flow}" ]
}
}
output {
stdout {
codec => rubydebug
}
}
I'm using logstash to collect my server.log from several glassfish domains. Unfortunatly in the log is no domainname. But the pathname have.
So I tried to get a part of the filename to match it to the GF-domain. The Problem is, that the pattern I defined don't matche the right part.
here the logstash.conf
file {
type => "GlassFish_Server"
sincedb_path => "D:/logstash/.sincedb_GF"
#start_position => beginning
path => "D:/logdir/GlassFish/Logs/GF0/server.log"
}
grok {
patterns_dir => "./patterns"
match =>
[ 'path', '%{DOMAIN:Domain}']
}
I' ve created a custom-pattern file and filled it with a regexp
my custom-pattern-file
DOMAIN (?:[a-zA-Z0-9_-]+[\/]){3}([a-zA-Z0-9_-]+)
And the result is:
"Domain" => "logdir/GlassFish/Logs/GF0"
I've tested my RegExp on https://www.regex101.com/ and is working fine.
Using http://grokdebug.herokuapp.com/ to verify the pattern brings the same "unwanted" result.
What I'm doing wrong? Has anybody an idea to get only the domain name "GF0", e.g. modify my pattern or using mutate in the logstash.conf?
I'm assuming that you're trying to strip out the GF0 portion from path?
If that's the case and you know that the path will always be in the same format, you could just use something like this for the grok:
filter {
grok {
match => [ 'path', '(?i)/Logs/%{WORD:Domain}/' ]
}
}
not as elegant as a regexp, but it should work.