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Most-used commands

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Connection and Authentication

curl -X GET 'https://opensearch-host:9200' -u 'username:password' Test connection to OpenSearch server curl -X GET 'https://opensearch-host:9200/_cluster/health' -u 'username:password' Check cluster health curl -X GET 'https://opensearch-host:9200/_cat/indices' -u 'username:password' List all indices

Index Management

curl -X PUT 'https://opensearch-host:9200/index-name' -u 'username:password' -H 'Content-Type: application/json' -d '{"settings":{"index":{"number_of_shards":3,"number_of_replicas":2}}}' Create an index with settings curl -X DELETE 'https://opensearch-host:9200/index-name' -u 'username:password' Delete an index curl -X GET 'https://opensearch-host:9200/index-name/_settings' -u 'username:password' Get index settings curl -X PUT 'https://opensearch-host:9200/index-name/_mapping' -u 'username:password' -H 'Content-Type: application/json' -d '{"properties":{"field1":{"type":"text"}}}' Update index mapping

Document Operations

curl -X POST 'https://opensearch-host:9200/index-name/_doc' -u 'username:password' -H 'Content-Type: application/json' -d '{"field1":"value1"}' Index a document with auto-generated ID curl -X PUT 'https://opensearch-host:9200/index-name/_doc/id1' -u 'username:password' -H 'Content-Type: application/json' -d '{"field1":"value1"}' Index a document with specified ID curl -X GET 'https://opensearch-host:9200/index-name/_doc/id1' -u 'username:password' Get a document by ID curl -X DELETE 'https://opensearch-host:9200/index-name/_doc/id1' -u 'username:password' Delete a document by ID curl -X POST 'https://opensearch-host:9200/index-name/_update/id1' -u 'username:password' -H 'Content-Type: application/json' -d '{"doc":{"field1":"new_value"}}' Update a document

Search and Query

curl -X GET 'https://opensearch-host:9200/index-name/_search' -u 'username:password' -H 'Content-Type: application/json' -d '{"query":{"match_all":{}}}' Search all documents in an index curl -X GET 'https://opensearch-host:9200/index-name/_search' -u 'username:password' -H 'Content-Type: application/json' -d '{"query":{"match":{"field1":"value1"}}}' Search documents matching a field value curl -X GET 'https://opensearch-host:9200/index-name/_search' -u 'username:password' -H 'Content-Type: application/json' -d '{"query":{"bool":{"must":[{"match":{"field1":"value1"}}],"filter":[{"range":{"age":{"gte":30}}}]}}}' Complex boolean query curl -X GET 'https://opensearch-host:9200/index-name/_search' -u 'username:password' -H 'Content-Type: application/json' -d '{"query":{"match_all":{}},"sort":[{"timestamp":"desc"}],"size":20,"from":0}' Paginated search with sorting

Aggregations

curl -X GET 'https://opensearch-host:9200/index-name/_search' -u 'username:password' -H 'Content-Type: application/json' -d '{"size":0,"aggs":{"avg_value":{"avg":{"field":"numeric_field"}}}}' Calculate average of a field curl -X GET 'https://opensearch-host:9200/index-name/_search' -u 'username:password' -H 'Content-Type: application/json' -d '{"size":0,"aggs":{"categories":{"terms":{"field":"category"}}}}' Group by and count values in a field curl -X GET 'https://opensearch-host:9200/index-name/_search' -u 'username:password' -H 'Content-Type: application/json' -d '{"size":0,"aggs":{"date_histogram":{"date_histogram":{"field":"timestamp","calendar_interval":"day"}}}}' Time-based aggregation

Cluster Management

curl -X GET 'https://opensearch-host:9200/_cluster/health' -u 'username:password' Check cluster health status curl -X GET 'https://opensearch-host:9200/_cat/nodes?v' -u 'username:password' List all nodes in the cluster curl -X GET 'https://opensearch-host:9200/_cluster/stats' -u 'username:password' Get cluster statistics curl -X GET 'https://opensearch-host:9200/_cat/shards?v' -u 'username:password' View shard allocation across nodes

Templates and Aliases

curl -X PUT 'https://opensearch-host:9200/_index_template/template_name' -u 'username:password' -H 'Content-Type: application/json' -d '{"index_patterns":["pattern*"],"template":{"settings":{"number_of_shards":1}}}' Create an index template curl -X POST 'https://opensearch-host:9200/_aliases' -u 'username:password' -H 'Content-Type: application/json' -d '{"actions":[{"add":{"index":"index-name","alias":"alias-name"}}]}' Create an alias for an index

Monitoring and Diagnostics

curl -X GET 'https://opensearch-host:9200/_cat/indices?v' -u 'username:password' List all indices with stats curl -X GET 'https://opensearch-host:9200/_cat/allocation?v' -u 'username:password' View disk allocation curl -X GET 'https://opensearch-host:9200/_nodes/stats' -u 'username:password' Get detailed node statistics curl -X GET 'https://opensearch-host:9200/_tasks' -u 'username:password' List running tasks