How can I export data from Elasticsearch to CSV using Logstash? I need to include only specific columns.
Install 2 plugins: elasticsearch input plugin and csv output plugin.
Then create a configuration file. Here is a good example for this particular case.
You are ready to go now, just run:
bin/logstash -f /path/to/logstash-es-to-csv-example.conf
And check export.csv file specified in output -> csv -> path.
Important note:
There is a known bug in csv output plugin when working with Logstash 5.x. The plugin generates a string of %{host} %{message}%{host} %{message}%{host} %{message}.
There's an open issue for it: https://github.com/logstash-plugins/logstash-output-csv/issues/10
As a workaround you may:
downgrade to Logstash 2.x until this gets resolved
use the file output instead
file {
codec => line { format => "%{field1},%{field2}"}
path => "/path/to/data_export.csv"
}
modify the plugin's code according to the github discussion...
Related
I'm playing a bit with kibana to see how it works.
i was able to add nginx log data directly from the same server without logstash and it works properly. but using logstash to read log files from a different server doesn't show data. no error.. but no data.
I have custom logs from PM2 that runs some PHP script for me and the format of the messages are:
Timestamp [LogLevel]: msg
example:
2021-02-21 21:34:17 [DEBUG]: file size matches written file size 1194179
so my gork filter is:
"%{DATESTAMP:timestamp} \[%{LOGLEVEL:loglevel}\]: %{GREEDYDATA:msg}"
I checked with Gork Validator and the syntax matches the file format.
i've got files that contain the suffix out that are debug level, and files with suffix error for error level.
so to configure logstash on the kibana server, i added the file /etc/logstash/conf.d/pipeline.conf with the following:
input {
beats {
port => 5544
}
}
filter {
grok {
match => {"message"=>"%{DATESTAMP:timestamp} \[%{LOGLEVEL:loglevel}\]: %{GREEDYDATA:msg}"}
}
mutate {
rename => ["host", "server"]
convert => {"server" => "string"}
}
}
output {
elasticsearch {
hosts => "http://localhost:9200"
user => "<USER>"
password => "<PASSWORD>"
}
}
I needed to rename the host variable to server or I would get errors like Can't get text on a START_OBJECT and failed to parse field [host] of type [text]
on the 2nd server where the pm2 logs reside I configure filebeat with the following:
- type: filestream
enabled: true
paths:
- /home/ubuntu/.pm2/*-error-*log
fields:
level: error
- type: filestream
enabled: true
paths:
- /home/ubuntu/.pm2/logs/*-out-*log
fields:
level: debug
I tried to use log and not filestream the results are the same.
but it makes sense to use filestream since the logs are updated constantly on ?
so i have logstash running on one server and filebeat on the other, opened firewall ports, i can see they're connecting but i don't see any new data in the Kibana logs dashboard relevant to the files i fetch with logstash.
filebeat log always shows this line Feb 24 04:41:56 vcx-prod-backup-01 filebeat[3797286]: 2021-02-24T04:41:56.991Z INFO [file_watcher] filestream/fswatch.go:131 Start next scan and something about analytics metrics so it looks fine, and still no data.
I tried to provide here as much information as I can, i'm new to kibana, i have no idea why data is not shown in kibana if there are no errors.
I thought maybe i didn't escaped the square brackets properly in gork filter so I tried using "%{DATESTAMP:timestamp} \\[%{LOGLEVEL:loglevel}\\]: %{GREEDYDATA:msg}" which replaces \[ with \\[ but the results are the same.
any information regarding this issue would be greatly appreciated.
#update
ֿ
using stack version 7.11.1
I changed back to log instead of filestream based on #leandrojmp recommendations.
I checked for harverser.go related lines i filebeat and I found these:
Feb 24 14:16:36 SERVER filebeat[4128025]: 2021-02-24T14:16:36.566Z INFO log/harvester.go:302 Harvester started for file: /home/ubuntu/.pm2/logs/cdr-ssh-out-1.log
Feb 24 14:16:36 SERVER filebeat[4128025]: 2021-02-24T14:16:36.567Z INFO log/harvester.go:302 Harvester started for file: /home/ubuntu/.pm2/logs/cdr-ftp-out-0.log
and I also noticed that when i configured the output to stdout, i do see the events that are coming from the other server. so logstash do receive them properly but for some reason i don't see them in kiban.
If you have output using both stdout and elasticsearch outputs but you do not see the logs in Kibana, you will need to create an index pattern in Kibana so it can show your data.
After creating an index pattern for your data, in your case the index pattern could be something like logstash-* you will need to configure the Logs app inside Kibana to look for this index, per default the Logs app looks for filebeat-* index.
ok... so #leandrojmp helped me a lot in understanding what's going on with kibana. thank you! all the credit goes to you! just wanted to write a log answer that may help other people overcome the initial setup.
lets start fresh
I wanted one kibana node that monitors custom logs on a different server.
I have ubuntu latest LTS installed on both, added the deb repositories, installed kibana, elsaticsearch and logstash on the first, and filebeat on the 2nd.
basic setup is without much security and SSL which is not what i'm looking for here since i'm new to this topic, everything is mostly set up.
in kibana.yml i changed the host to 0.0.0.0 instead of localhost so i can connect from outside, and in logstash i added the following conf file:
input {
beats {
port => 5544
}
}
filter {
grok {
match => {"message"=>"%{DATESTAMP:timestamp} \[%{LOGLEVEL:loglevel}\]: %{GREEDYDATA:msg}"}
}
mutate {
rename => ["host", "server"]
convert => {"server" => "string"}
}
}
output {
elasticsearch {
hosts => ["http://localhost:9200"]
}
}
i didn't complicate things and didn't need to set up additional authentication.
my filebeat.yml configuration:
- type: log
enabled: true
paths:
- /home/ubuntu/.pm2/*-error-*log
fields:
level: error
- type: log
enabled: true
paths:
- /home/ubuntu/.pm2/logs/*-out-*log
level: debug
i started everything, no errors in any logs but still no data in kibana, since i had no clue how elasticsearch stored it's data, i needed to find out how can i connect to elasticsearch and see if the data is there, so i executed curl -X GET http://localhost:9200/_cat/indices?v and noticed a logstash index, so i executed curl -X GET http://localhost:9200/logstash-2021.02.24-000001/_search and i noticed that the log data is presented in the database.
so it must means that it's something with kibana. so using the web interface of kibana under settings I noticed a configuration called Index pattern for matching indices that contain log data and the input there did not match the logstash index name, so i appended ,logstash* to it and voila! it works :)
thanks
I have a requirement where my elk has to pick each file in a folder as a single log.
I have parent_folder/ inside which a folder will be created for a run run_folder/ inside which a few types of log files are created. I need to push each file as a single log into elastic search.
Folder Structure
parent_folder/run1/file1.log
parent_folder/run1/file2.err
parent_folder/run1/file3.diff
...
parent_folder/run2/file1.log
parent_folder/run2/file2.err
parent_folder/run2/file3.diff
Elastic search should have
doc1{
message: the content of parent_folder/run1/file1.log
}
doc2{
message: the content of parent_folder/run1/file2.err
}
doc3{
message: the content of parent_folder/run2/file2.err
}
... so on
These files like parent_folder/run2/file2.err are written once and never changed or touched again, no need to monitor for changes.
Thanks
With filebeat, you can make use of multiline patterns. Find a pattern that never match on your log file and configure something like below in filebeat configuration.
multiline.pattern: 'never_matching_pattern'
multiline.match: after
Reference: https://discuss.elastic.co/t/filebeat-send-the-entire-logfile-as-a-single-message/118265
When trying to run logstash 5 on windows:
C:\Development\workspace\logstash>C:\Development\Software\logstash-5.1.2\bin\logstash.bat
-f robot-log.js
It gives following error:
Could not find log4j2 configuration at path /Development/Software/logstash-5.1.2/config/log4j2.properties. Using default config which logs to console
15:03:53.667 [[main]-pipeline-manager] INFO logstash.filters.multiline - Grok loading patterns from file {:path=>"C:/Development/Software/logstash-5.1.2/vendor/bundle/jruby/1.9/gems/logstash-patterns-core-4.0.2/patterns/aws"}
15:03:53.684 [[main]-pipeline-manager] INFO logstash.filters.multiline - Grok loading patterns from file {:path=>"C:/Development/Software/logstash-5.1.2/vendor/bundle/jruby/1.9/gems/logstash-patterns-core-4.0.2/patterns/bacula"}
15:03:53.693 [[main]-pipeline-manager] INFO logstash.filters.multiline - Grok loading patterns from file ...
The file is actually present in the directory. Why is logstash unable to find it?
Note:
I originally though this was a problem with Ruby using Linux path separator. However, as #Stefan pointed out in comments below, Ruby accepts Linux style paths even on Windows
This seems to be a bug in latest version of logstash. Under logger.rb it has following code:
def self.initialize(config_location)
##config_mutex.synchronize do
if ##logging_context.nil?
file_path = URI(config_location).path
if ::File.exists?(file_path)
logs_location = java.lang.System.getProperty("ls.logs")
puts "Sending Logstash's logs to #{logs_location} which is now configured via log4j2.properties"
##logging_context = Configurator.initialize(nil, config_location)
else
# fall back to default config
puts "Could not find log4j2 configuration at path #{file_path}. Using default config which logs to console"
##logging_context = Configurator.initialize(DefaultConfiguration.new)
end
end
end
end
The call to URI.path seems problematic because according to documentation it returns /posts when the input is http://foo.com/posts?id=30&limit=5#time=1305298413
I'm not a Ruby programmer so I have no idea why logstash devs used it here. But simply replacing file_path = URI(config_location).path with file_path = config_location fixes the problem for me.
C:\Development\workspace\logstash>C:\Development\Software\logstash-5.1.2\bin\logstash.bat -f robot-log.js
Sending Logstash's logs to C:/Development/Software/logstash-5.1.2/logs which is now configured via log4j2.properties
[2017-01-24T15:22:04,754][INFO ][logstash.filters.multiline] Grok loading patterns from file {:path=>"C:/Development/Software/logstash-5.1.2/vendor/bundle/jruby/1.9/gems/logstash-patterns-core-4.0.2/patterns/aws"}
[2017-01-24T15:22:04,769][INFO ][logstash.filters.multiline] Grok loading patterns from file {:path=>"C:/Development/Software/logstash-5.1.2/vendor/bundle/jruby/1.9/gems/logstash-patterns-core-4.0.2/patterns/bacula"}
[2017-01-24T15:22:04,772][INFO ][logstash.filters.multiline] Grok loading patterns from file {:path=>"C:/Development/Software/logstash-5.1.2/vendor/bundle/jruby/1.9/gems/logstash-patterns-core-4.0.2/patterns/bro"}
I have an elasticsearch cluster (ELK) and some nodes sending logs to the logstash using filebeat. All the servers in my environment are CentOS 6.5.
The filebeat.yml file in each server is enforced by a Puppet module (both my production and test servers got the same configuration).
I want to have a field in each document which tells if it came from a production/test server.
I wanted to generate a dynamic custom field in every document which indicates the environment (production/test) using filebeat.yml file.
In order to work this out i thought of running a command which returns the environment (it is possible to know the environment throught facter) and add it under an "environment" custom field in the filebeat.yml file but I couldn't find any way of doing so.
Is it possible to run a command through filebeat.yml?
Is there any other way to achieve my goal?
In your filebeat.yml:
filebeat:
prospectors:
-
paths:
- /path/to/my/folder
input_type: log
# Optional additional fields. These field can be freely picked
# to add additional information to the crawled log files
fields:
mycustomvar: production
in filebeat-7.2.0 i use next syntax:
processors:
- add_fields:
target: ''
fields:
mycustomfieldname: customfieldvalue
note: target = '' means that mycustomfieldname is a top-level field
official 7.2 docs
Yes, you can add fields to the document through filebeats.
The official doc shows you how.
I am struggling to configure and use logstash with elasticsearch. I downloaded the logstash-1.2.0-flatjar.jar, and created the sample.conf with content
input { stdin { type => "stdin-type"}}
output { stdout {}
elasticsearch { embedded => true }
}
and tried to run java -jar logstash-1.2.0-flatjar.jar agent -f sample.conf which produces
{:fix_jar_path=>["jar:file:/C:/Users/Rajesh/Desktop/Toshiba/logstach-jar/logstash-1.2.0-flatjar.jar!/locales/en.yml"]}
log4j, [2014-04-02T22:39:28.121] WARN: org.elasticsearch.discovery.zen.ping.unicast: [Chimera] failed to send ping to [[#zen_unicast_1#][inet[localho
st/127.0.0.1:9300]]]
Could anyone please help? Do i need to install plugins? Please provide the link
Thanks in Advance
Instead of using the embedded elasticsearch in logstash, you can try to download elasticsearch and start the elasticsearch as a different instance. Please refer to this page about how to setup an elasticsearch