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ELK Docker Containers


Do not attempt to build these containers, only pull them from Dockerhub


This repo contains the configuration files and Dockerfiles to build individual Elasticsearch, Logstash and Kibana containers with a lightweight Alpine based image. You can use Docker Compose to build and run the containers.

Table of Contents

Up and Running

You will need to have Docker and Docker Compose installed.

Create a Logstash configuration file and start the containers:

cp logstash/assets/logstash-template.conf  logstash/assets/logstash.conf
docker-compose up -d

Once you start sending events to Logstash, you can connect to Kibana on port 80 of your host and configure an index pattern.

Mounted Volumes and Configurations

Updating Logstash.conf

This stack takes advantage of Volume mounting to facilitate quick configuration changes. When you make a change to logstash/assets/logstash.conf you can apply the change by restarting the container:

 docker-compose restart logstash

Data Persistance

In order for your Elasticsearch data to persist the data directory is mounted at:

elasticsearch/volumes/esdata 

Enabling HTTPS

You can quickly enable HTTPS on the Nginx container by adding your certs the nginx/assets/certs directory, updating the nginx/assets/default-ssl-example.conf file with your certificate names and making it the default.conf file:

cp nginx/assets/default-ssl-example.conf nginx/assets/default.conf
docker-compose restart nginx

Notes

I added a tty=true to the Logstash launch options because it kept immediately shutting down after start up completed.

Elasticsearch vm_max_map_count

The vm_max_map_count kernel setting needs to be set to at least 262144. Update /etc/sysctl.conf with the following line:

vm.max_map_count=262144

Or issue the command from the terminal as root

sysctl -w vm.max_map_count=262144