feat: add Elasticsearch datasource support #424
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Add support for querying Elasticsearch datasources through the MCP server. Features: - New query_elasticsearch tool that supports: - Lucene query syntax for simple queries - Elasticsearch Query DSL JSON for complex queries - Time range filtering using RFC3339 format - Configurable result limits (default: 10, max: 100) - Returns documents with index, ID, source fields, and optional score Changes: - Add tools/elasticsearch.go with ElasticsearchClient and query implementation - Add tools/elasticsearch_test.go with integration tests - Update cmd/mcp-grafana/main.go to register Elasticsearch tools - Add --disable-elasticsearch flag for selective tool disabling - Update README.md with Elasticsearch documentation in: - Features section - Datasources section - Tools table with RBAC permissions - CLI flags reference Implementation follows the same patterns as existing Prometheus and Loki datasource integrations for consistency. Fixes grafana#283
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Summary
Adds support for querying Elasticsearch datasources through the MCP server, implementing the feature requested in #283.
Features
query_elasticsearchtool that supports:status:200 AND host:server1)Changes
tools/elasticsearch.gowithElasticsearchClientand query implementationtools/elasticsearch_test.gowith integration testscmd/mcp-grafana/main.goto register Elasticsearch tools--disable-elasticsearchflag for selective tool disablingREADME.mdwith comprehensive Elasticsearch documentationImplementation
/api/datasources/proxy/uid/{uid})Testing
Documentation
Updated README.md with:
query_elasticsearchtool in the Tools table with RBAC permissions--disable-elasticsearchflag in CLI flags referenceFixes #283