How do I add an attribute to an Elasticsearch node for the purpose of Shard Allocation Filtering?

Question

I'm attempting to follow the reference guide to make sure certain indexes end up on certain machines. I'm attempting to give 2 of my nodes an attribute named "storage_type", where one node gets "long_term" and one gets "short_term".

I understand that I need to add the attribute of "storage_type" to each of the nodes, and then set each index to have {"index.routing.allocation.require.tag" : "short"} or {"index.routing.allocation.require.tag" : "long"} respectively.

I've attempted to add these settings via curl calls, like most ES things, but it does not appear that I could PUT settings. i.e.:

 curl -XPUT localhost:9200/_nodes/my_node_name/_settings -d '{"storage_term" : "short_term"}'

So how do I add these attributes such as "storage_type" (which is n to nodes)? Is it a config file? A command line argument? An HTTP call that I'm missing?

Answer 1

Since version 5.0 node attributes are to be set via node.attr.:

node.attr.storage_term: short_term

See Shard Allocation Filtering section of the official reference.

Answer 2

It's not to be done through curl calls. You need to use elasticsearch.yml.

• in elasticsearch.yml:

node.storage_term: short_term