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ELK Stack

(Documentation how to integrate the SDI (Sumpfgottheit's Docker Images)[https://github.com/sumpfgottheit/sdi-centos7/wiki]

This Image provides an ELK Stack, based on versions of 2015-06-29, which are:

  • CentOS 7
  • OpenJDK 8
  • Logstash 1.5.1
  • Elasticsearch 1.6.0
  • Kibana 4.1.0

Usage

This image uses supervisor to start the three components (Logstash, Elasticsearch, Kibana). The configurationfiles for supervisor are take from the supervisor/ directory within the github repository, which are copied into the directory /etc/supervisord.d/ on the image. Supervisord itself is configured, to log into the file /var/log/supervisord.log. This file is also preconfigured to be read by logstash and put into elasticsearch.

When the container ist started, connect to the port 5601 and kibana will welcome you. Acknowledge the predefined index (logstash-*) and you will see the supervisord logentries.

Every component is configured to log itself into the /var/log/ directory.

Configuration

There are three volumes, that you should be aware of:

  • /var/log: Every component logs into this directory. It is strictly not necessary, but so it is a well defined place where logstash will find it's own logfiles.
  • /etc/logstash.d: Put every configuration von logstash into this volume. The whole directory is read on startup.
  • /var/elasticsearch: In this directory, elasticsearch will store everything. It's indexes and whatever it needs. Having this as a volume makes it possible to make the data persistent.

Containers from this image are meant to be a central logging solution for your service. By using /etc/logstash.d as a volume, you can centralize the logstash-configurations for every service.

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