Multiple nodes in ElasticSearch

Question

How can I have multiple nodes in my ElasticSearch? I'm using the following in elasticsearch.yml but only the last node starts, and the browser complains: The page at file://localhost/ says: undefined.

node.name: "No Data"
node.master: true
node.data: false

node.name: "Data One"
node.master: false
node.data: true

node.name: "Data Two"
node.master: false
node.data: true

Answer 1

I think the simplest way to do it is by specifying these parameters on the command line. To start three nodes you just need to run the following three commands in elasticsearch home directory:

$ bin/elasticsearch -Des.node.data=false -Des.node.master=true -Des.node.name=NoData
$ bin/elasticsearch -Des.node.data=true -Des.node.master=false -Des.node.name=DataOne
$ bin/elasticsearch -Des.node.data=true -Des.node.master=false -Des.node.name=DataTwo

Another solution is to create 3 different config files and start three nodes with -Des.config=path-to-config-file parameter.

Answer 2

First off, you should be trying to access elasticsearch using [http://localhost:9200/][1], if you are using the default port bindings.

I would set up your master node to also be a data node, there is no reason not to. If you are trying to start 3 nodes on a single machine. But, starting 3 nodes all on the same machine doesn't make sense as anything other than an experiment. What are you trying to accomplish?