🐳 Elastic Stack on Docker, with preconfigured security, tools, self-monitoring, and Prometheus Metrics Exporters

With tools like Curator, ElastAlert for Alerting.

Introduction

Elastic Stack (AKA ELK) Docker Composition, preconfigured with Security, Monitoring, Tools such as ElastAlert for alerting and Curator.

Based on Official Elastic Docker Images

Stack Version: 7.4.0.

You can change Elastic Stack version by setting ELK_VERSION in .env file and rebuild your images. Any version >= 7.0.0 is compatible with this template.

Main Points 📜

• Configured as Production Single Node Cluster. (With a multi-node option for experimenting).
• Security Enabled (under basic license).
• SSL Enabled for Transport Layer.
• Use Docker-Compose and .env to configure your stack.
• Automated Script that initializes and persist Elasticsearch's Keystore and SSL Certifications.
• Curator Preconfigured for Automated Snapshotting (Need to setup S3 Repository).
• Self-Monitoring Metrics Enabled.
• Prometheus Exporters for Stack Metrics.
• Filebeat instance for shipping Stack logs to Elasticsearch itself.
• ElastAlert preconfigured for Alerting.
• Embedded Container Healthchecks for Stack Images.

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Requirements

• Docker 17.05 or higher
• Docker-Compose 3 or higher (optional)

Setup

1. Clone the Repository, or:

2. Initialize Elasticsearch Keystore and SSL Certificates

$ make setup

3. Start Elastic Stack

$ make elk
---- OR ----
$ docker-compose up -d

4. Visit Kibana at localhost:5601

Username: elastic Password: changeme (or ELASTIC_PASSWORD value in .env)

Modify .env file for your needs, most importantly ELASTIC_PASSWORD that setup your superuser elastic's password, ELASTICSEARCH_HEAP & LOGSTASH_HEAP for Elasticsearch & Logstash Heap Size and ELK_VERSION for, yk, Stack Version.

Additional Commands

To Start Monitoring and Prometheus Exporters

$ make monitoring

To Start Tools (ElastAlert and Curator

$ make tools

To Start ELK, Tools and Monitoring

$ make all

To Start 2 Extra Elasticsearch nodes (for development only)

$ make nodes

To Rebuild Images

$ make build

Bring down the stack.

$ make down

Make sure to run make setup if you changed ELASTIC_PASSWORD and to restart the stack after changing anything in .env.

Notes

• Adding Two Extra Nodes to the cluster will make the cluster depending on them and won't start without them again.

• Makefile is a wrapper around Docker-Compose commands, use make help to know every command.

• Elasticsearch will save its data to a volume named elasticsearch-data

• Elasticsearch Keystore (that contains passwords and credentials) and SSL Certificate are generated in the ./secrets directory by the setup command.

• Linux Users must set the following configuration as root

sysctl -w vm.max_map_count=262144

By default, Virtual Memory is not enough.

Configuration

• Some Configuration are parameterized in the .env file.
  • ELASTIC_PASSWORD, user elastic's password (default: changeme pls).
  • ELK_VERSION Elastic Stack Version (default: 7.3.0)
  • ELASTICSEARCH_HEAP, how much Elasticsearch allocate from memory (default: 1GB -good for development only-)
  • LOGSTASH_HEAP, how much Logstash allocate from memory.
  • Other configurations which their such as cluster name, and node name, etc.
• Elasticsearch Configuration in elasticsearch.yml at ./elasticsearch/config.
• Logstash Configuration in logstash.yml at ./elasticsearch/config/logstash.yml.
• Logstash Pipeline in main.conf at ./elasticsearch/pipeline/main.conf.
• Kibana Configuration in kibana.yml at ./kibana/config.
• ElastAlert Configuration in ./tools/elastalert/config.
• ElastAlert Alert rules in ./tools/elastalert/rules, head to ElastAlert docs to lookup how to create alerts.
• Curator Actions at ./tools/curator/actions and ./tools/curator/crontab.

Setting Up Keystore

You can extend the Keystore generation script by adding keys to ./setup/keystore.sh script. (e.g Add S3 Snapshot Repository Credentials)

To Re-generate Keystore:

make keystore

Enable SSL on HTTP

By default, only transport layer has SSL Enabled, to enable SSL on Http layer, add the following lines to elasticsearch.yml

## - http
xpack.security.http.ssl.enabled: true
xpack.security.http.ssl.verification_mode: certificate
xpack.security.http.ssl.keystore.path: certs/elastic-certificates.p12
xpack.security.http.ssl.truststore.path: certs/elastic-certificates.p12

Enabling SSL on HTTP layer will require all clients that connect to elasticsearch to configure SSL connection, this includes all current parts of the stack (e.g Logstash, Kibana, Curator, etc).

Monitoring Cluster

Prometheus Exporters

If you started Prometheus Exporters using make monitoring command. Prometheus Exporters will expose metrics at the following ports.

Prometheus Exporter	Port	Note
elasticsearch-exporter	9114	-
logstash-exporter	9304	-
cadvisor-exporter	8080	- To Monitor Each Container stats and metrics.

Self-Monitoring is Enabled

Head to Stack Monitoring tab in Kibana to see cluster metrics for all stack components.

In Production, cluster metrics should be shipped to another dedicated monitoring cluster.

License

MIT License Copyright (c) 2019 Sherif Abdel-Naby

Contribution

PR(s) are Open and Welcomed.