CODEWITHSUNDEEP
elasticsearch
Nate Fox
Nate Fox

Reputation: 2513

Elasticsearch: evacuate all data before shutdown of a data node?

Is there a way to tell a node to remove all of its data (spread it back out among the other nodes) so that I can shut it down and not deal with a rebalance/re-replicate once its down?

If I have 2 copies of each shard, and I drop one node, some of the shards now only have 1 live copy and it has to be re-replicated. I'd prefer to not drop down to 1 live copy for any period of time if I can.

Upvotes: 6

Views: 7684

Answers (1)

Nate Fox
Nate Fox

Reputation: 2513

After posting to the ES mailing list, I was informed the proper answer lies in the _cluster/settings api, specifically the cluster.routing.allocation.exclude._ip option.

From the docs: http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/modules-cluster.html

curl -XPUT localhost:9200/_cluster/settings -d '{
  "transient" : {
    "cluster.routing.allocation.exclude._ip" : "10.0.0.1"
  }
}'

The IP address can be a comma separated list. To 'un-exclude', just remove the IP from the list (or set the list to "" to remove all excluded IPs).

Hopefully this helps others looking for the answer to this same question.

Upvotes: 15

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