Check cluster health

Show cluster status: green/yellow/red with shard counts

curl -s http://es:9200/_cluster/health?pretty
tool
elasticsearch19 commands
tags
elasticsearchmonitoring

More elasticsearch commands

  • List indices with size
    curl -s 'http://es:9200/_cat/indices?v&s=store.size:desc'

    All indices sorted by store size (largest first)

  • Delete old index
    curl -X DELETE http://es:9200/logs-2024.01.01

    Remove a specific index (irreversible)

  • Search with query DSL
    curl -X GET 'http://es:9200/logs-*/_search?pretty' -H 'Content-Type: application/json' -d '{"query":{"match":{"level":"error"}},"size":5}'

    Find last 5 error log entries

  • Show shards allocation
    curl -s 'http://es:9200/_cat/shards?v&h=index,shard,prirep,state,node,unassigned.reason'

    Show all shards with their state and unassigned reason

  • Force shard re-allocation
    curl -X POST http://es:9200/_cluster/reroute?retry_failed=true

    Retry allocation of all failed/unassigned shards

all 19 elasticsearch commands