I'm searching a way to compare a Logstash field to a number in a conditional statement, but couldn't find anything in the documentation.
Something like this for example:
if [myfiels] => 1{
mutate {
add_field => ["fild", "1"]
}
or
if [myfiels] >= 1 and [myfiels] <= 3 {
mutate {
add_field => ["fild", "2"]
}
Thanks.
You first need to convert column type.
input {
stdin{}
}
filter {
grok {
match => ["message","%{NUMBER:num}" ]
}
mutate {
convert => { "num" => "integer" }
}
if [num] >= 5 {
mutate {
add_field => { "xyz" => "123" }
}
}
}
output {
stdout { codec => rubydebug }
}
Related
I have a string field called description delimited with _.
I split it as follows:
filter {
mutate {
split => ["description", "_"]
add_field => {"location" => "%{[description][3]}"}
}
How can I check if the split values are empty or not?
I have attempted:
if !["%{[description][3]}"] {
# do something
}
if ![[description][3]] {
# do something
}
if ![description][3] {
# do something
}
None of them work.
The goal is to have the value of the new field location as its actual value or a generic value such as NA.
you made a really simple mistake with your mutate split.
this
mutate {
split => ["description", "_"]
add_field => {"location" => "%{[description][3]}"}
}
should have been
mutate {
split => ["description"=> "_"] <=== see I removed the comma and added =>
add_field => {"location" => "%{[description][3]}"}
}
here is sample I tested out with
filter {
mutate {
remove_field => ["headers", "#version"]
add_field => { "description" => "Python_Java_ruby_perl " }
}
mutate {
split => {"description" => "_"}
}
if [description][4] {
mutate {
add_field => {"result" => "The 4 th field exists"}
}
} else {
mutate {
add_field => {"result" => "The 4 th field DOES NOT exists"}
}
}
and the result on console (since there is no 4 th element, it went to else block
{
"host" => "0:0:0:0:0:0:0:1",
"result" => "The 4 th field DOES NOT exists", <==== from else block
"#timestamp" => 2020-01-14T19:35:41.013Z,
"message" => "hello",
"description" => [
[0] "Python",
[1] "Java",
[2] "ruby",
[3] "perl "
]
}
I have a log line like this:
09 Nov 2018 15:51:35 DEBUG api.MapAnythingProvider - Calling API For Client: XXX Number of ELEMENTS Requested YYY
I want to ignore all other log lines and only want those lines that have the words "Calling API For Client" in it. Further, I am only interested in the String XXX and Number YYY.
Thanks for the help.
input {
file {
path => ["C:/apache-tomcat-9.0.7/logs/service/service.log"]
sincedb_path => "nul"
start_position => "beginning"
}
}
filter {
grok {
match => {
"message" => "%{MONTHDAY:monthDay} %{MONTH:mon} %{YEAR:year} %{TIME:ts} %{WORD:severity} %{JAVACLASS:claz} - %{GREEDYDATA:logmessage}"
}
}
grok {
match => {
"logmessage" => "%{WORD:keyword} %{WORD:customer} %{WORD:key2} %{NUMBER:mapAnythingCreditsConsumed:float} %{WORD:key3} %{NUMBER:elementsFromCache:int}"
}
}
if "_grokparsefailure" in [tags] {
drop {}
}
mutate {
remove_field => [ "monthDay", "mon", "ts", "severity", "claz", "keyword", "key2", "path", "message", "year", "key3" ]
}
}
output {
if [logmessage] =~ /ExecutingJobFor/ {
elasticsearch {
hosts => ["localhost:9200"]
index => "test"
manage_template => false
}
stdout {
codec => rubydebug
}
}
}
I wanted to make a copy of a nested field in a Logstash filter but I can't figure out the correct syntax.
Here is what I try:
incorrect syntax:
mutate {
add_field => { "received_from" => %{beat.hostname} }
}
beat.hostname is not replaced
mutate {
add_field => { "received_from" => "%{beat.hostname}" }
}
beat.hostname is not replaced
mutate {
add_field => { "received_from" => "%{[beat][hostname]}" }
}
beat.hostname is not replaced
mutate {
add_field => { "received_from" => "%[beat][hostname]" }
}
No way. If I give a non nested field it works as expected.
The data structure received by logstash is the following:
{
"#timestamp" => "2016-08-24T13:01:28.369Z",
"beat" => {
"hostname" => "etg-dbs-master-tmp",
"name" => "etg-dbs-master-tmp"
},
"count" => 1,
"fs" => {
"device_name" => "/dev/vdb",
"total" => 5150212096,
"used" => 99287040,
"used_p" => 0.02,
"free" => 5050925056,
"avail" => 4765712384,
"files" => 327680,
"free_files" => 326476,
"mount_point" => "/opt/ws-etg/datas"
},
"type" => "filesystem",
"#version" => "1",
"tags" => [
[0] "topbeat"
],
"received_at" => "2016-08-24T13:01:28.369Z",
"received_from" => "%[beat][hostname]"
}
EDIT:
Since you didn't show your input message I worked off your output. In your output the field you are trying to copy into already exists, which is why you need to use replace. If it does not exist, you do in deed need to use add_field. I updated my answer for both cases.
EDIT 2: I realised that your problem might be to access the value that is nested, so I added that as well :)
you are using the mutate filter wrong/backwards.
First mistake:
You want to replace a field, not add one. In the docs, it gives you the "replace" option. See: https://www.elastic.co/guide/en/logstash/current/plugins-filters-mutate.html#plugins-filters-mutate-replace
Second mistake, you are using the syntax in reverse. It appears that you believe this is true:
"text I want to write" => "Field I want to write it in"
While this is true:
"myDestinationFieldName" => "My Value to be in the field"
With this knowledge, we can now do this:
mutate {
replace => { "[test][a]" => "%{s}"}
}
or if you want to actually add a NEW NOT EXISTING FIELD:
mutate {
add_field => {"[test][myNewField]" => "%{s}"}
}
Or add a new existing field with the value of a nested field:
mutate {
add_field => {"some" => "%{[test][a]}"}
}
Or more details, in my example:
input {
stdin {
}
}
filter {
json {
source => "message"
}
mutate {
replace => { "[test][a]" => "%{s}"}
add_field => {"[test][myNewField]" => "%{s}"}
add_field => {"some" => "%{[test][a]}"}
}
}
output {
stdout { codec => rubydebug }
}
This example takes stdin and outputs to stdout. It uses a json filter to parse the message, and then the mutate filter to replace the nested field. I also add a completely new field in the nested test object.
And finally creates a new field "some" that has the value of test.a
So for this message:
{"test" : { "a": "hello"}, "s" : "to_Repalce"}
We want to replace test.a (value: "Hello") with s (Value: "to_Repalce"), and add a field test.myNewField with the value of s.
On my terminal:
artur#pandaadb:~/dev/logstash$ ./logstash-2.3.2/bin/logstash -f conf2/
Settings: Default pipeline workers: 8
Pipeline main started
{"test" : { "a": "hello"}, "s" : "to_Repalce"}
{
"message" => "{\"test\" : { \"a\": \"hello\"}, \"s\" : \"to_Repalce\"}",
"#version" => "1",
"#timestamp" => "2016-08-24T14:39:52.002Z",
"host" => "pandaadb",
"test" => {
"a" => "to_Repalce",
"myNewField" => "to_Repalce"
},
"s" => "to_Repalce"
"some" => "to_Repalce"
}
The value has succesfully been replaced.
A field "some" with the replaces value has been added
A new field in the nested array has been added.
if you use add_field, it will convert a into an array and append your value there.
Hope this solves your issue,
Artur
My logstash.conf can be seen below.
How would I go about filtering out messages which include a specific string? In this case, some of my messages are reading as "DEBUG: xxx-xxx-xxx", and I would like for these to be filtered OUT of logstash.
input {
tcp {
port => 5000
type => syslog
}
udp {
port => 5000
type => syslog
}
}
filter {
if [loglevel] == "debug" {
drop { }
}
if [type] == "syslog" {
grok {
match => {
"message" => "%{SYSLOG5424PRI}%{NONNEGINT:ver} +(?:% {TIMESTAMP_ISO8601:ts}|-) +(?:%{HOSTNAME:containerid}|-) +(?:%{NOTSPACE:containername}|-)
+(?:%{NOTSPACE:proc}|-) +(?:%{WORD:msgid}|-) +(?:%{SYSLOG5424SD:sd}|-|) +%{GREEDYDATA:msg}" }
}
syslog_pri { }
date {
match => [ "syslog_timestamp", "MMM d HH:mm:ss", "MMM dd HH:mm:ss" ]
}
if !("_grokparsefailure" in [tags]) {
mutate {
replace => [ "#source_host", "%{syslog_hostname}" ]
replace => [ "#message", "%{syslog_message}" ]
}
}
mutate {
remove_field => [ "syslog_hostname", "syslog_message", "syslog_timestamp" ]
}
}
}
output {
elasticsearch { host => "elasticsearch" }
stdout { codec => rubydebug }
}
EDIT:
I should clarify that it is the GREEDYDATA:msg field that I wish to drop if it includes a "DEBUG" message.
You're looking for drop:
filter {
if [myField] == "badValue" {
drop { }
}
}
While it's better to use exact matches, you can also do regexp conditionals:
filter {
if [myField] =~ "DEBUG" {
drop { }
}
}
I am parsing several logfiles of different load balanced serverclusters with my logstash config and would like to add a field "log_origin" to each file's entries for the later easy filtering.
Here's my input->file config in a simple example:
input {
file {
type => "node1"
path => "C:/Development/node1/log/*"
add_field => [ "log_origin", "live_logs" ]
}
file {
type => "node2"
path => "C:/Development/node2/log/*"
add_field => [ "log_origin", "live_logs" ]
}
file {
type => "node3"
path => "C:/Development/node1/log/*"
add_field => [ "log_origin", "live_logs" ]
}
file {
type => "node4"
path => "C:/Development/node1/log/*"
add_field => [ "log_origin", "live_logs" ]
}
}
filter {
grok {
match => [
"message","%{DATESTAMP:log_timestamp}%{SPACE}\[%{DATA:class}\]%{SPACE}%{LOGLEVEL:loglevel}%{SPACE}%{GREEDYDATA:log_message}"
]
}
date {
match => [ "log_timestamp", "dd.MM.YY HH:mm:ss", "ISO8601" ]
target => "#timestamp"
}
mutate {
lowercase => ["loglevel"]
strip => ["loglevel"]
}
if "_grokparsefailure" in [tags] {
multiline {
pattern => ".*"
what => "previous"
}
}
if[fields.log_origin] == "live_logs"{
if [type] == "node1" {
mutate {
add_tag => "realsServerName1"
}
}
if [type] == "node2" {
mutate {
add_tag => "realsServerName2"
}
}
if [type] == "node3" {
mutate {
add_tag => "realsServerName3"
}
}
if [type] == "node4" {
mutate {
add_tag => "realsServerName4"
}
}
}
}
output {
stdout { }
elasticsearch { embedded => true }
}
I would have expected logstash to add this field with the value given to every logentry it finds, but it doesn't. Maybe I am completely taking the wrong approach here?
Edit: I am not able to retrieve the logs directly from the nodes, but have to copy them over to my "server". Otherwise i would be able to just use the filepath for distinguishing different clusters...
Edit: It's working. I should have cleand my data in between. Old entries without the field added cluttered up my results.
The add_field expects a hash. It should be
add_field => {
"log_origin" => "live_logs"
}