I have this grok:
grok {
patterns_dir => "/etc/logstash/patterns/"
break_on_match => false
keep_empty_captures => true
match => [
"message", "(%{EXIM_DATE:exim_date} )(%{EXIM_PID:exim_pid} )(%{EXIM_MSGID:exim_msg_id} )(%{EXIM_FLAGS:exim_flags} )(%{GREEDYDATA})",
"message", "(%{EXIM_MSGID} )(<= )(%{NOTSPACE:env_sender} )(%{EXIM_REMOTE_HOST} )?(%{EXIM_INTERFACE} )?(%{EXIM_PROTOCOL} )?(X=%{NOTSPACE:tls_info} )?(%{EXIM_MSG_SIZE} )?(%{EXIM_HEADER_ID} )?(%{EXIM_SUBJECT})",
"message", "(%{EXIM_MSGID} )([=-]> )(%{NOTSPACE:env_rcpt} )(<%{NOTSPACE:env_rcpt_outer}> )?(R=%{NOTSPACE:exim_router} )(T=%{NOTSPACE:exim_transport} )(%{EXIM_REMOTE_HOST} )(X=%{NOTSPACE:tls_info} )?(QT=%{EXIM_QT:exim_qt})",
"message", "(%{EXIM_DATE:exim_date} )(%{EXIM_PID:exim_pid} )(%{EXIM_MSGID:exim_msg_id} )(Completed )(QT=%{EXIM_QT:exim_qt})",
"message", "(%{EXIM_DATE:exim_date} )(%{EXIM_PID:exim_pid} )(%{EXIM_MSGID:exim_msg_id} )?(%{EXIM_REMOTE_HOST} )?(%EXIM_INTERFACE} )?(F=<%{NOTSPACE:env_sender}> )?(.+(rejected after DATA|rejected \(but fed to sa-learn\)|rejected [A-Z]+ (or [A-Z]+ %{NOTSPACE}?|<%{NOTSPACE:env_rcpt}>)?): (?<exim_rej_reason>.+))"
]
}
If I test the grok patterns individually everything works as expected, but in production with multiple matches they do not. The result is OK, I got everything parsed, but I got every time a _grokparsefailure tag, also if one of the 5 is a match. How do I prevent this?
Tag removal is not what I want because if there is no match the tag should be added so I can drop the message.
The reason, that you get a failure is that you have set the break_on_match, which test every entry in your match. This results in one of your patterns not matching and setting the _grokparsefailure tag.
From the looks of it your patterns are all exclusive to one another so you wouldn't need to set the break_on_match and still retain the functionality.
Related
I am trying to stash a log file to elasticsearch using Logstash. I am facing a problem while doing this.
If the log file has same kind of log lines like the below,
[12/Sep/2016:18:23:07] VendorID=5037 Code=C AcctID=5317605039838520
[12/Sep/2016:18:23:22] VendorID=9108 Code=A AcctID=2194850084423218
[12/Sep/2016:18:23:49] VendorID=1285 Code=F AcctID=8560077531775179
[12/Sep/2016:18:23:59] VendorID=1153 Code=D AcctID=4433276107716482
where the date, vendorId, code and acctID's order of occurrence of fields does not change or a new element is not added in to it, then the filter(given below) in the config files work well.
\[%{MONTHDAY}/%{MONTH}/%{YEAR}:%{TIME}\] VendorID=%{INT:VendorID} Code=%{WORD:Code} AcctID=%{INT:AcctID}
Suppose the order changes like the example given below or if a new element is added to one of the log lines, then the grokparsefailure occurs.
[12/Sep/2016:18:23:07] VendorID=5037 Code=C AcctID=5317605039838520
[12/Sep/2016:18:23:22] VendorID=9108 Code=A AcctID=2194850084423218
[12/Sep/2016:18:23:49] VendorID=1285 Code=F AcctID=8560077531775179
[12/Sep/2016:18:23:59] VendorID=1153 Code=D AcctID=4433276107716482
[12/Sep/2016:18:24:50] AcctID=3168124750473449 VendorID=1065 Code=L
[12/Sep/2016:18:24:50] AcctID=3168124750473449 VendorID=1065 Code=L
[12/Sep/2016:18:24:50] AcctID=3168124750473449 VendorID=1065 Code=L
Here in the example, the last three log lines are different from the first four log lines in order of occurrence of the fields. And because of this, the filter message with the grok pattern could not parse the below three lines as it is written for the first four lines.
How should I handle this scenario, when i come across this case? Please help me solve this problem. Also provide any link to any document for detailed explanation with examples.
Thank you very much in advance.
As correctly pointed out by baudsp, this can be achieved by multiple grok filters. The KV filter seems like a nicer option, but as for grok, this is one solution:
input {
stdin {}
}
filter {
grok {
match => {
"message" => ".*test1=%{INT:test1}.*"
}
}
grok {
match => {
"message" => ".*test2=%{INT:test2}.*"
}
}
}
output {
stdout { codec => rubydebug }
}
By having 2 different grok filter applied, we can disregard the order of the logs coming in. The patterns specified basically do not care about what comes before or after the String test and rather just standalone match their respective patterns.
So, for these 2 strings:
test1=12 test2=23
test2=23 test1=12
You will get the correct output. Test:
artur#pandaadb:~/dev/logstash$ ./logstash-2.3.2/bin/logstash -f conf_grok_ordering/
Settings: Default pipeline workers: 8
Pipeline main started
test1=12 test2=23
{
"message" => "test1=12 test2=23",
"#version" => "1",
"#timestamp" => "2016-12-21T16:48:24.175Z",
"host" => "pandaadb",
"test1" => "12",
"test2" => "23"
}
test2=23 test1=12
{
"message" => "test2=23 test1=12",
"#version" => "1",
"#timestamp" => "2016-12-21T16:48:29.567Z",
"host" => "pandaadb",
"test1" => "12",
"test2" => "23"
}
Hope that helps
How can I trim to only the last part of a key in logstash?
I have URLs formatted in the form of http://aaa.bbb/get?a=1&b=2, putting them into 'request' and splitting the field based on '?&' to save the GET parameters.
I care only about the specific API call, and not the host or protocol. What filter(s) can I chain to keep only the part after the final '/'? I've read up a bit on patterns but haven't stumbled upon how to reference the last part of a split field.
grok {
match => [ "message", "%{TIMESTAMP_ISO8601:timestamp}
%{NOTSPACE:loadbalancer} %{IP:client_ip}:%{NUMBER:client_port:int}
%{IP:backend_ip}:%{NUMBER:backend_port:int}
%{NUMBER:request_processing_time:float}
%{NUMBER:backend_processing_time:float}
%{NUMBER:response_processing_time:float}
%{NUMBER:elb_status_code:int}
%{NUMBER:backend_status_code:int}
%{NUMBER:received_bytes:int} %{NUMBER:sent_bytes:int}
%{QS:request}" ]
}
date {
match => [ "timestamp", "ISO8601" ]
}
kv {
field_split => "&?"
source => "request"
}
I would suggest taking the existing URI-related patterns and modifying them to your needs. You will note that URIPATHPARAM parses out the URIPATH and URIPARAM but doesn't shove them into fields.
So, make your own URIPATHPARAM:
MYURIPATHPARM URIPATHPARAM %{URIPATH:uripath}(?:%{URIPARAM:uriparam})?
and then call it from your own URI:
MYURI URI %{URIPROTO}://(?:%{USER}(?::[^#]*)?#)?(?:%{URIHOST})?(?:%{MYURIPATHPARAM})?
In your previous grok{}, you ended up with %{request}. Make a new grok{} that runs [request] through MYURI, and you should end up with the two fields that you're after.
I'm creating a logstash grok filter to pull events out of a backup server, and I want to be able to test a field for a pattern, and if it matches the pattern, further process that field and pull out additional information.
To that end I'm embedding an if statement within the grok statement itself. This is causing the test to fail with Error: Expected one of #, => right after the if.
This is the filter statement:
filter {
grok {
patterns_dir => "./patterns"
# NetWorker logfiles have some unusual fields that include undocumented engineering codes and what not
# time is in 12h format (ugh) so custom patterns need to be used.
match => [ "message", "%{NUMBER:engcode1} %{DATESTAMP_12H:timestamp} %{NUMBER:engcode2} %{NUMBER:engcode3} %{NUMBER:engcode4} %{NUMBER:ppid} %{NUMBER:pid} %{NUMBER:engcode5} %{WORD:processhost} %{WORD:processname} %{GREEDYDATA:daemon_message}" ]
# attempt to find completed savesets and pull that info from the daemon_message field
if [daemon_message] =~ /done\ saving\ to\ pool/ {
grok {
match => [ "daemon_message", "%{WORD:savehost}\:%{WORD:saveset} done saving to pool \'%{WORD:pool}\' \(%{WORD:volume}\) %{WORD:saveset_size}" ]
}
}
}
date {
# This is requred to set the time from the logline to the timestamp and not have it create it's own.
# Note the use of the trailing 'a' to denote AM or PM.
match => ["timestamp", "MM/dd/yyyy HH:mm:ss a"]
}
}
This block fails with the following:
$ /opt/logstash/bin/logstash -f ./networker_daemonlog.conf --configtest
Error: Expected one of #, => at line 12, column 12 (byte 929) after # Basic dumb simple networker daemon log grok filter for the NetWorker daemon.log
# no smarts to this and not really pulling any useful info from the files (yet)
filter {
grok {
... lines deleted ...
# attempt to find completed savesets and pull that info from the daemon_message field
if
I'm new to logstash, and I realise that using a conditional within the grok statement may not be possible, but I'd prefer doing conditional processing this way to additional match lines as this would leave the daemon_message field intact for other uses while pulling out the data I want.
ETA: I should also point out that totally removing the if statement allows the configtest to pass and the filter to parse logs.
Thanks in advance...
Conditionals go outside the filters, so something like:
if [field] == "value" {
grok {
...
}
]
would be correct. In your case, do the first grok, then test to run the second, i.e.:
grok {
match => [ "message", "%{NUMBER:engcode1} %{DATESTAMP_12H:timestamp} %{NUMBER:engcode2} %{NUMBER:engcode3} %{NUMBER:engcode4} %{NUMBER:ppid} %{NUMBER:pid} %{NUMBER:engcode5} %{WORD:processhost} %{WORD:processname} %{GREEDYDATA:daemon_message}" ]
}
if [daemon_message] =~ /done\ saving\ to\ pool/ {
grok {
match => [ "daemon_message", "%{WORD:savehost}\:%{WORD:saveset} done saving to pool \'%{WORD:pool}\' \(%{WORD:volume}\) %{WORD:saveset_size}" ]
}
}
This is really running two regexps for a record that matches. Since grok will only make fields when the regexp matches, you can do this:
grok {
match => [ "message", "%{NUMBER:engcode1} %{DATESTAMP_12H:timestamp} %{NUMBER:engcode2} %{NUMBER:engcode3} %{NUMBER:engcode4} %{NUMBER:ppid} %{NUMBER:pid} %{NUMBER:engcode5} %{WORD:processhost} %{WORD:processname} %{GREEDYDATA:daemon_message}" ]
}
grok {
match => [ "daemon_message", "%{WORD:savehost}\:%{WORD:saveset} done saving to pool \'%{WORD:pool}\' \(%{WORD:volume}\) %{WORD:saveset_size}" ]
}
You'd have to measure the performance across your actual log files since this will run fewer regexps, but the second one is more complicated.
If you really want to go nuts, you can do all of this in one grok{}, using the break_on_match feature.
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.
New to logstash. I am trying to parse application log lines such as:
2014-11-05 16:59:36,779 ERROR DOMAINNAME\bob [This is an error. ]
My config file looks like this:
input {
file {
path => "C:/tmp/*.log"
}
}
filter {
grok {
match => [
"message", "%{TIMESTAMP_ISO8601:timestamp}\s*%{LOGLEVEL:level}\s*%{DATA:userAlias}\s*%{GREEDYDATA:message}"
]
overwrite => [ "message" ]
}
if [level] =~ "INFO" {
drop {
}
}
}
output {
elasticsearch {
host => "localhost"
protocol => "http"
}
}
The timestamp and level are parsed out fine, but the message displays in Kibana as:
message:
DOMAINNAME\bob [This is an error. ]
The grok pattern for DATA is .*?
so I would assume that it should handle the backslash \ and properly set
userAlias to DOMAINNAME\bob and
message to [This is an error. ]
But this isn't the case. What am I doing wrong here? Thanks.
The problem with your grok pattern is that .*? is non-greedy (i.e. optional) and .* is greedy, so the latter "takes over" the string that could have been matched by the preceding .*? pattern.
I suggest you avoid the DATA and GREEDYDATA patterns except for matching the remainder of the string (like your use of GREEDYDATA here). In this case you could e.g. use the NOTSPACE pattern to match the username. You could use an even more specific pattern that e.g. excludes characters that are invalid in usernames, but I don't see the point of that. This works:
"%{TIMESTAMP_ISO8601:timestamp}\s+%{LOGLEVEL:level}\s+%{NOTSPACE:userAlias}\s+%{GREEDYDATA:message}"
(I also took the liberty of replacing \s* with \s+ since the whitespace between the fields isn't optional.)