Update index settings

Change replica count on a live index

curl -X PUT 'http://es:9200/my-index/_settings' -H 'Content-Type: application/json' -d '{"index":{"number_of_replicas":1}}'

More elasticsearch commands

Create index template

curl -X PUT 'http://es:9200/_index_template/logs-tpl' -H 'Content-Type: application/json' -d '{"index_patterns":["logs-*"],"template":{"settings":{"number_of_shards":2}}}'

Auto-configure new indices matching logs-*
Snapshot to repository

curl -X PUT 'http://es:9200/_snapshot/my_repo/snap1?wait_for_completion=true'

Create a cluster snapshot synchronously
Cluster health

curl -s http://localhost:9200/_cluster/health | jq .

Show cluster status: green/yellow/red, shards, nodes
List indices

curl -s 'http://localhost:9200/_cat/indices?v&h=index,health,pri,rep,docs.count,store.size&s=store.size:desc'

Tabular index listing sorted by size
Delete index

curl -X DELETE http://localhost:9200/<index>

Remove an index and all its data