How to deploy ElasticSearch in Docker

1. What is ElasticSearch?

Elasticsearch is also developed in Java and uses Lucene as its core to implement all indexing and search functions, but its purpose is to hide the complexity of Lucene through a simple RESTful API, making full-text search simple.

However, Elasticsearch is more than just Lucene and full-text search. We can also describe it like this:

Distributed real-time file storage, each field is indexed

A distributed real-time analytical search engine that can be searched and indexed

Can be expanded to hundreds of servers and process PB-level structured or unstructured data

2. Deploy ElasticSearch with Docker

2.1 Pull the image

docker pull docker.elastic.co/elasticsearch/elasticsearch:6.3.2

2.2 Run the container

The default port of ElasticSearch is 9200. We map the host environment port 9200 to the Docker container port 9200, and then we can access the ElasticSearch service in the Docker container. At the same time, we name this container es .

2.3 Configuring cross-domain

2.3.1 Entering the container

Since configuration is required, you need to enter the container to modify the corresponding configuration information.

docker exec -it es /bin/bash

2.3.2 Configuration

# Display file ls
The results are as follows:
LICENSE.txt README.textile config lib modules
NOTICE.txt bin data logs plugins

# Enter the configuration folder cd config

# Display file ls
The results are as follows:
elasticsearch.keystore ingest-geoip log4j2.properties roles.yml users_roles
elasticsearch.yml jvm.options role_mapping.yml users

# Modify the configuration file vi elasticsearch.yml

# Add cross-domain configuration http.cors.enabled: true
http.cors.allow-origin: "*"

2.3 Restarting the container

Since the configuration has been modified, the ElasticSearch container needs to be restarted.

docker restart es

The display is as follows:

3. Docker deployment of ElasticSearch-Head

Why install ElasticSearch-Head ? The reason is that you need a management interface to view ElasticSearch related information

3.1 Pull the image

docker pull mobz/elasticsearch-head:5

3.2 Run the container

docker run -d --name es_admin -p 9100:9100 mobz/elasticsearch-head:5

The display is as follows:

In this way, we have completed the use of Docker to provide Elasticsearch services without polluting the host environment. This has another benefit. If you want to start multiple different versions of Elastcsearch or other services at the same time, Docker is also an ideal solution.

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