Sample message :
13-12-2022 `ACTIVITY-LOG` 20108 `The is my sample HMAC message`HMAC HMAC HMAC
I want to replace this to :
13-12-2022 `ACTIVITY-LOG` 20108 `The is my sample HMAC message`
I have tried below code but it replaces all occurrences of HMAC:
mutate {
gsub => [ "message", "HMAC", "" ]
}
I only want the pattern to be removed when it comes immediately after `.
How can I achieve this in logstash using gsub?
Related
I am lost ! I have an example netscaler log and I want to use Grok Pattern in elastic.
Example Log:
Dec 18 20:37:08 <local0.info> 10.217.31.247 CEF:0|Citrix|NetScaler|NS10.0|APPFW|APPFW_STARTURL|6|src=10.217.253.78 spt=53743 method=GET request=http://vpx247.example.net/FFC/login.html msg=Disallow Illegal URL. cn1=233 cn2=205 cs1=profile1 cs2=PPE0 cs3=AjSZM26h2M+xL809pON6C8joebUA000 cs4=ALERT cs5=2012 act=blocked
I dont know the pattern for <local0.info>
The timestamp is: %{SYSLOGTIMESTAMP:timestamp}, thats easy, but what about the next one and the other strings ?
I really hope someone can help me out :S
You can use Grok Debugger to debug the grok patterns. Below is the GROK pattern for your example log:
%{SYSLOGTIMESTAMP:timestamp} \<%{DATA:data}\.%{LOGLEVEL:loglevel}\> %{IP:ip} %{DATA:data}\|src\=%{IP:source_ip} %{GREEDYDATA:payload}
Let's split the field payload using KV Filter of the logstash.
kv {
source => "payload"
value_split => "="
field_split => " "
target => "msg"
}
I'm having these json parsing errors from time to time:
2022-01-07T12:15:19,872][WARN ][logstash.filters.json ] Error parsing json
{:source=>"message", :raw=>" { the invalid json }", :exception=>#<LogStash::Json::ParserError: Unrecognized character escape 'x' (code 120)
Is there a way to get the :exception field in the logstash config file?
I opened the exact same thread on the elastic forum and got a working solution there. Thanks to #Badger on the forum, I ended up using the following raw ruby filter:
ruby {
code => '
#source = "message"
source = event.get(#source)
return unless source
begin
parsed = LogStash::Json.load(source)
rescue => e
event.set("jsonException", e.to_s)
return
end
#target = "jsonData"
if #target
event.set(#target, parsed)
end
'
}
which extracts the info I needed:
"jsonException" => "Unexpected character (',' (code 44)): was expecting a colon to separate field name and value\n at [Source: (byte[])\"{ \"baz\", \"oh!\" }\r\"; line: 1, column: 9]",
Or as the author of the solution suggested, get rid of the #target part and use the normal json filter for the rest of the data.
I am using logstash filter by grok and import log file into elasticsearch. I want to split my log file into 4 parts which are time, log-level, class(edited: sorry my bad, it is thread, not class) and message.
Below are a few lines of my log file generated by spring-boot using lob-back.xml
2019-09-17 16:25:01,116 INFO [main]: org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler:initialize:Initializing ExecutorService 'taskScheduler'
2019-09-17 16:25:01,225 INFO [main]: org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor:initialize:Initializing ExecutorService 'applicationTaskExecutor'
The error I am getting is as follows:
[2019-09-17T16:25:01,425][ERROR][logstash.codecs.json] JSON parse error, original data now in message field {:error=>#<LogStash::Json::ParserError:
Unexpected character ('-' (code 45)): Expected space separating root-level values
"; line: 1, column: 6]>, :data=>"2019-09-17 16:25:01,043 INFO [main]: org.springframework.security.web.DefaultSecurityFilterChain:<init>:Creating filter chain: Ant [pattern='/v2/api-docs'], []\r"}
My logstash configuration:
input {
file {
path => "C:/data/log/*.log"
codec => "json"
type => "logback"
}
}
filter {
grok {
match => {
"message" => "%{TIMESTAMP_ISO8601:timestamp} %{LOGLEVEL:log-level} [%{DATA:class}]: %{GREEDYDATA:syslog_message}"
}
}
}
output {
if [type]=="logback" {
elasticsearch {
hosts => [ "localhost:9200" ]
index => "logback-%{+YYYY.MM.dd}"
}
}
}
You have to escape [] characters to consider them like part of string, not like special characters
match => {
"message" => '^%{TIMESTAMP_ISO8601:timestamp} %{LOGLEVEL:log_level}%{SPACE}\[%{DATA:thread}\]: %{GREEDYDATA:syslog_message}$'
}
I've update your pattern with a few improvements:
Set start(^) and end($) of line anchors to raise regex performance,
because failure will be faster. More info about it here.
Your logs have 2 space between "log-level" and "class" (in fact, it is thread, not class). If it is not permanent amount of spaces (sometimes Spring fill a log variable up to some length), it is better to use %{SPACE} mask.
Follow es name convention for "log-level" variable:
Use snake case (underscores) for combining words.
I have the following log:
2018-10-30 11:47:52 INFO 30464 SMS-MT [cid:300038] [queue-msgid:bb7a195d-fb23-42ae-bbfa-d2dcda405af9] [smpp-msgid:j.11082.639364178944.#MARKET SETU] [status:ESME_ROK] [prio:1] [dlr:NO_SMSC_DELIVERY_RECEIPT_REQUESTED] [validity:none] [from:2323232] [to:23232132312] [content:'#MARKET SETUP\nadsadadadadasdasdadaasdada mo ang:\nC jean_rivera\n--Mag reply ng A-C']
I've created a grok filter based on pattern in logstash so I can parse the log the way I want. And I have this:
%{DATESTAMP:Timestamp} %{LOGLEVEL:Level} %{BASE10NUM:Pid} %{USERNAME:SMS_TYPE} %{CID:CID} %{GREEDYDATA:Message}
I'm trying to create a GROK patter that will match 300038, which is the number coming after cid:. The syntax is always the same, [cid:number]. What I have now is:
CID (\[cid:[0-9]{6}\])
but that results into:
"CID": [
[
"[cid:300038]"
]
],
and I only want to match the 300038, without the [cid:] part
I have noticed that there are more than single space character between LOG and pid, you can match all of them using \s*.
To match just a number from [cid:300038] you can use custom pattern, \[cid:(?<CID>[0-9]{1,})\] this will match cid of any length, not just 6 digits.
Your pattern will become,
%{DATESTAMP:Timestamp} %{LOGLEVEL:Level}\s*%{BASE10NUM:Pid} %{USERNAME:SMS_TYPE} \[cid:(?<CID>[0-9]{1,})\] %{GREEDYDATA:Message}
Use
%{DATESTAMP:Timestamp} %{LOGLEVEL:Level} %{BASE10NUM:Pid} %{USERNAME:SMS_TYPE} \[cid:(?<CID>[0-9]{6})\] %{GREEDYDATA:Message}
when I'm parsing iis log file in UTF-8 format I'm getting below error and When I'm parsing log file using ANSI format there is nothing working Logstash just display message on console " Logstash startup completed". There is almost 1000 files on my server i can't change each file format from ANSI to UTF-8. Can you please help where I need to change in my config file. I'm also attaching debug file when I'm parsing files on UTF-8 format. I'm using elastic search on same box and its completely working fine. I'm also able to telnet port 9200 with 127.0.0.1.
Log sample:
2016-03-26T05:40:40.764Z WIN-AK44913P759 2016-03-24 00:16:31 W3SVC20 ODSANDBOXWEB01 172.x.x.x GET /healthmonitor.axd - 80 - 172.x.x.x HTTP/1.1 - - - www.xyz.net 200 0 0 4698 122 531
stdout output:
{
"message" => "2016-03-24 04:43:02 W3SVC20 ODSANDBOXWEB01 172.x.x.x GET /healthmonitor.axd - 80 - 172.x.x.x HTTP/1.1 - - - www.xyz.net 200 0 0 4698 122 703\r",
"#version" => "1",
"#timestamp" => "2016-03-26T05:42:15.045Z",
"path" => "C:\\IISLogs/u_ex160324.log",
"host" => "WIN-AK44913P759",
"type" => "IISLog",
"tags" => [
[0] "_grokparsefailure"
]
}
Below is my logstash conf file configuration
input {
file {
type => "IISLog"
path => "C:\IISLogs/u_ex*.log"
start_position => "beginning"
}
}
filter {
#ignore log comments
if [message] =~ "^#" {
drop {}
}
grok {
match => ["message", "%{TIMESTAMP_ISO8601:log_timestamp} %{WORD:iisSite} %{IPORHOST:site} %{WORD:method} %{URIPATH:page} %{NOTSPACE:querystring} %{NUMBER:port} %{NOTSPACE:username} %{IPORHOST:clienthost} %{NOTSPACE:useragent} %{NOTSPACE:referer} %{NUMBER:response} %{NUMBER:subresponse} %{NUMBER:scstatus} %{NUMBER:bytes:int} %{NUMBER:timetaken:int}"]
}
#Set the Event Timesteamp from the log
date {
match => [ "log_timestamp", "YYYY-MM-dd HH:mm:ss" ]
timezone => "Etc/UCT"
}
useragent {
source=> "useragent"
prefix=> "browser"
}
mutate {
remove_field => [ "log_timestamp"]
}
}
# output logs to console and to elasticsearch
output {
stdout {}
elasticsearch {
hosts => ["127.0.0.1:9200"]
}
stdout {
codec => rubydebug
}
}
The _grokparsefailure tag means that your grok pattern didn't match your input. It looks like you're intending the pattern to skip the first two fields, which is fine.
Then, looking at the next four fields, I see:
2016-03-24 00:16:31 W3SVC20 ODSANDBOXWEB01 172.1.1.1
but your pattern is looking for
%{TIMESTAMP_ISO8601:log_timestamp} %{WORD:iisSite} %{IPORHOST:site} %{WORD:method}
You haven't accounted for the IP address (since ODSANDBOXWEB01 is going into [site]).
Building grok patterns is a deliberate, iterative process. Start at the debugger. Enter a sample input line and then add grok patterns - one at a time! - until the entire line has been matched.
Also, when you obfuscate your data, please leave it as valid data. Changing the ip to 172.x.x.x means that it won't match the %{IP} pattern without us having to figure out what you did. I changed it to 172.1.1.1 in this example.