Can I run multiple Elasticsearch instances in one server?

Elastic Stack Elasticsearch
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Can I run multiple Elasticsearch instances in one server?
-If yes, How can I install 2 Elasticsearch instances in a single Linux server.
I am aware if we use "yum install" will be installed without any issue.

Thanks in Advance

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Yes, we can run multiple instances of Elasticsearch in a single machine/server.
Instead of using yum install command, you can download, configure and run the tar.gz files from elastic.co, But use different ports and data directories for each instance.

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Welcome!

Why do you want to do this?

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Yes and I did that recently with my laptop for experimentation with things that I would like to do with ES Cluster. This setup simplifies my environment, instead of using docker or using multiple machines/VMs/EC2 instances.

You can download and use the .tar.gz file recommended above, and then you can do one of the following options

  • option 1 - untar the file into two directories: es-01, es-02 then update the config file in each node

  • option 2 - untar the file into one directory: es-instance, copy the config directory to another location with something like path/to/es-01/config, path/to/es-02/config then create a script to launch elasticsearch from the same binary location (which is es-instance) but use different config location (one for es-01/config, one for es-02/config)

You need to update the following parameters in config/elasticsearch.yml file to separate one node from the other.

  • cluster.name
  • node.name
  • path.data
  • path.logs
  • http.port
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