Filters in logstach
Filters are an in-line processing mechanism which provide the flexibility to slice and dice your data to fit your needs. Let’s see one in action, namely the grok filter.
input { stdin { } }
filter {
grok {
match => { "message" => "%{COMBINEDAPACHELOG}" }
}
date {
match => [ "timestamp" , "dd/MMM/yyyy:HH:mm:ss Z" ]
}
}
output {
elasticsearch { host => localhost }
stdout { codec => rubydebug }
}
Run logstash with this configuration:
bin/logstash -f logstash-filter.conf
Now paste this line into the terminal (so it will be processed by the stdin input):
127.0.0.1 - - [11/Dec/2013:00:01:45 -0800] "GET /xampp/status.php HTTP/1.1" 200 3891 "http://cadenza/xampp/navi.php" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:25.0) Gecko/20100101 Firefox/25.0"
Run Logstash from Local File buy configuring input session. Below we parse a apache access log from local server.
input {
file {
path => "/Users/kurt/logs/access_log"
start_position => beginning
}
}
filter {
if [path] =~ "access" {
mutate { replace => { "type" => "apache_access" } }
grok {
match => { "message" => "%{COMBINEDAPACHELOG}" }
}
}
date {
match => [ "timestamp" , "dd/MMM/yyyy:HH:mm:ss Z" ]
}
}
output {
elasticsearch {
host => localhost
}
stdout { codec => rubydebug }
}
Logstach Configuration for parsing nginx Logs
input {
file {
path => "/Users/kurt/logs/access_log"
start_position => beginning
}
}
filter {
if [path] =~ "access" {
mutate { replace => { "type" => "apache_access" } }
grok {
match => { "message" => "%{COMBINEDAPACHELOG}" }
}
}
date {
match => [ "timestamp" , "dd/MMM/yyyy:HH:mm:ss Z" ]
}
}
output {
elasticsearch {
host => localhost
}
stdout { codec => rubydebug }
}
Filters are an in-line processing mechanism which provide the flexibility to slice and dice your data to fit your needs. Let’s see one in action, namely the grok filter.
input { stdin { } }
filter {
grok {
match => { "message" => "%{COMBINEDAPACHELOG}" }
}
date {
match => [ "timestamp" , "dd/MMM/yyyy:HH:mm:ss Z" ]
}
}
output {
elasticsearch { host => localhost }
stdout { codec => rubydebug }
}
Run logstash with this configuration:
bin/logstash -f logstash-filter.conf
Now paste this line into the terminal (so it will be processed by the stdin input):
127.0.0.1 - - [11/Dec/2013:00:01:45 -0800] "GET /xampp/status.php HTTP/1.1" 200 3891 "http://cadenza/xampp/navi.php" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:25.0) Gecko/20100101 Firefox/25.0"
Run Logstash from Local File buy configuring input session. Below we parse a apache access log from local server.
input {
file {
path => "/Users/kurt/logs/access_log"
start_position => beginning
}
}
filter {
if [path] =~ "access" {
mutate { replace => { "type" => "apache_access" } }
grok {
match => { "message" => "%{COMBINEDAPACHELOG}" }
}
}
date {
match => [ "timestamp" , "dd/MMM/yyyy:HH:mm:ss Z" ]
}
}
output {
elasticsearch {
host => localhost
}
stdout { codec => rubydebug }
}
Logstach Configuration for parsing nginx Logs
input {
file {
path => "/Users/kurt/logs/access_log"
start_position => beginning
}
}
filter {
if [path] =~ "access" {
mutate { replace => { "type" => "apache_access" } }
grok {
match => { "message" => "%{COMBINEDAPACHELOG}" }
}
}
date {
match => [ "timestamp" , "dd/MMM/yyyy:HH:mm:ss Z" ]
}
}
output {
elasticsearch {
host => localhost
}
stdout { codec => rubydebug }
}