OpenSearch Logs MCP Server
OpenSearch Logs MCP Server
MCP (Model Context Protocol) Server zum Abfragen von OpenTelemetry-Logs in OpenSearch. Unterstützt Entwicklungs- (dev) und Produktionsumgebungen (prod).
Architektur
Der Server folgt den SOLID-Prinzipien und der Clean Architecture:
src/
├── index.ts # Entry point
├── server.ts # MCP Server setup
├── config/
│ └── environments.ts # Environment configuration
├── types/
│ └── index.ts # Type definitions
├── services/
│ ├── opensearch-client.ts # HTTP client for OpenSearch
│ └── log-search.service.ts # Business logic
├── tools/
│ ├── tool-definitions.ts # Tool schemas
│ └── tool-handlers.ts # Tool execution
└── utils/
├── query-builder.ts # Query construction (Builder pattern)
└── time-range.ts # Time utilitiesAngewandte Prinzipien
Single Responsibility (SRP): Jedes Modul hat eine einzige Verantwortung
Open/Closed (OCP): Einfaches Hinzufügen neuer Tools ohne Änderung des bestehenden Codes
Dependency Inversion (DIP): Dienste hängen von Abstraktionen (Interfaces) ab
Builder Pattern:
QueryBuilderfür den flüssigen Aufbau von Abfragen
Related MCP server: datadog-logs-mcp
Installation
cd Tools/mcp-opensearch-logs
npm install
npm run buildKonfiguration in Cursor
Füge dies zu deiner Cursor-Konfiguration hinzu (~/.cursor/mcp.json):
{
"mcpServers": {
"opensearch-logs": {
"command": "node",
"args": ["/ruta/al/proyecto/Tools/mcp-opensearch-logs/dist/index.js"],
"env": {
"OPENSEARCH_DEV_USERNAME": "tu-usuario-dev",
"OPENSEARCH_DEV_PASSWORD": "tu-password-dev",
"OPENSEARCH_PROD_USERNAME": "tu-usuario-prod",
"OPENSEARCH_PROD_PASSWORD": "tu-password-prod"
}
}
}
}Verfügbare Tools
search_logs
Freitextsuche mit Lucene-Syntax.
Parameter | Typ | Erforderlich | Beschreibung | ||||
environment |
|
| ✅ | Zu durchsuchende Umgebung | |||
query | string | ✅ | Abfrage in Lucene-Syntax | ||||
timeRange |
|
|
|
|
| ❌ | Zeitbereich (Standard: 1h) |
size | number | ❌ | Maximale Anzahl der Ergebnisse (Standard: 50, max: 200) |
Beispiele:
"Suche nach Logs, die 'error' enthalten, in dev aus der letzten Stunde"
"Suche nach Logs mit Status 500 in prod aus den letzten 6 Stunden"
search_by_trace
Sucht alle Logs eines OpenTelemetry-Traces.
Parameter | Typ | Erforderlich | Beschreibung | |
environment |
|
| ✅ | Zu durchsuchende Umgebung |
traceId | string | ✅ | Trace-ID | |
size | number | ❌ | Maximale Anzahl der Ergebnisse (Standard: 100) |
Beispiel:
"Gib mir alle Logs für den Trace abc123 in dev"
search_by_service
Filtert Logs nach Dienstname.
Parameter | Typ | Erforderlich | Beschreibung | ||||
environment |
|
| ✅ | Zu durchsuchende Umgebung | |||
serviceName | string | ✅ | Dienstname | ||||
level |
|
|
|
|
| ❌ | Log-Stufe |
query | string | ❌ | Zusätzliche Abfrage | ||||
timeRange | string | ❌ | Zeitbereich | ||||
size | number | ❌ | Maximale Anzahl der Ergebnisse |
Beispiele:
"Suche nach Logs des Dienstes stori-ios in prod"
"Gib mir die Fehler des Dienstes stori-ios in dev"
search_errors
Sucht nach Logs der Stufe ERROR oder höher (severityNumber >= 17).
Parameter | Typ | Erforderlich | Beschreibung | |
environment |
|
| ✅ | Zu durchsuchende Umgebung |
serviceName | string | ❌ | Nach Dienst filtern | |
query | string | ❌ | Zusätzliche Abfrage | |
timeRange | string | ❌ | Zeitbereich | |
size | number | ❌ | Maximale Anzahl der Ergebnisse |
Beispiele:
"Gib mir die Fehler der letzten Stunde in prod"
"Suche nach Fehlern im Zusammenhang mit KYC in dev"
get_field_values
Ruft die häufigsten Werte eines Feldes ab (Aggregation).
Parameter | Typ | Erforderlich | Beschreibung | |
environment |
|
| ✅ | Zu durchsuchende Umgebung |
field | string | ✅ | Zu aggregierendes Feld | |
size | number | ❌ | Maximale Anzahl eindeutiger Werte (Standard: 20) |
Beispiele:
"Welche Werte hat das Feld 'event' in prod?"
"Gib mir die häufigsten Fehlertypen in dev"
search_by_field
Sucht nach einem spezifischen Feld und Wert.
Parameter | Typ | Erforderlich | Beschreibung | |
environment |
|
| ✅ | Zu durchsuchende Umgebung |
field | string | ✅ | Feldname | |
value | string | ✅ | Zu suchender Wert | |
timeRange | string | ❌ | Zeitbereich | |
size | number | ❌ | Maximale Anzahl der Ergebnisse |
Beispiel:
"Suche nach Logs mit transactionId=abc123 in prod"
get_mapping
Ruft das Feld-Mapping des Index ab.
Parameter | Typ | Erforderlich | Beschreibung | |
environment |
|
| ✅ | Zu durchsuchende Umgebung |
Beispiel:
"Welche Felder sind in den prod-Logs verfügbar?"
get_sample_log
Ruft ein Beispiel-Log ab, um die Struktur zu sehen.
Parameter | Typ | Erforderlich | Beschreibung | |
environment |
|
| ✅ | Zu durchsuchende Umgebung |
Beispiel:
"Gib mir ein Beispiel-Log aus prod, um die Struktur zu sehen"
Lucene-Suchsyntax
Das Feld query unterstützt die vollständige Lucene-Syntax:
Syntax | Beschreibung | Beispiel |
| Suche in jedem Feld |
|
| Suche in einem bestimmten Feld |
|
| Wildcard |
|
| Beide Begriffe |
|
| Einer der Begriffe |
|
| Begriff ausschließen |
|
| Bereich |
|
| Exakte Übereinstimmung |
|
Zeitbereiche
Wert | Beschreibung |
| Letzte 15 Minuten |
| Letzte Stunde (Standard) |
| Letzte 6 Stunden |
| Letzte 24 Stunden |
| Letzte 7 Tage |
Entwicklung
# Desarrollo con watch mode
npm run dev
# Build
npm run build
# Lint
npm run lintOpenTelemetry-Logstruktur
Die Logs folgen dem OpenTelemetry-Schema:
{
"time": "2024-01-15T10:30:00.000Z",
"severityText": "ERROR",
"severityNumber": 17,
"body": "Error message",
"attributes": {
"event": "kyc_error",
"kycFlow": "creditL1",
"transactionId": "abc123"
},
"resource": {
"service.name": "stori-ios",
"service.version": "1.0.0"
}
}Available Tools
8 toolsget_field_valuesB
Get the most common values for a specific field. Useful for discovering available services, log levels, or other field values.
| Name | Required | Description | Default |
|---|---|---|---|
| environment | Yes | Environment to search: 'dev'/'prod' (iOS) or 'android-dev'/'android-prod' (Android) | |
| field | Yes | The field to get values for. Examples: 'service.name', 'level', 'host.name' | |
| size | No | Maximum number of unique values to return (default: 20) |
get_mappingA
Get the field mapping for the index. Useful for discovering available fields and their types.
| Name | Required | Description | Default |
|---|---|---|---|
| environment | Yes | Environment to search: 'dev'/'prod' (iOS) or 'android-dev'/'android-prod' (Android) |
get_sample_logB
Get a single sample log entry to see the structure and available fields.
| Name | Required | Description | Default |
|---|---|---|---|
| environment | Yes | Environment to search: 'dev'/'prod' (iOS) or 'android-dev'/'android-prod' (Android) |
search_by_fieldC
Search logs by a specific field and value.
| Name | Required | Description | Default |
|---|---|---|---|
| environment | Yes | Environment to search: 'dev'/'prod' (iOS) or 'android-dev'/'android-prod' (Android) | |
| field | Yes | The field name to search. Examples: 'user_id', 'request_id', 'endpoint' | |
| value | Yes | The value to search for | |
| timeRange | No | Time range to search within | |
| size | No | Maximum number of results to return (default: 50) |
search_by_serviceC
Search logs filtered by service name, optionally with additional filters.
| Name | Required | Description | Default |
|---|---|---|---|
| environment | Yes | Environment to search: 'dev'/'prod' (iOS) or 'android-dev'/'android-prod' (Android) | |
| serviceName | Yes | The service name to filter by | |
| level | No | Log level to filter by | |
| query | No | Additional free-text query to apply | |
| timeRange | No | Time range to search within | |
| size | No | Maximum number of results to return (default: 50) |
search_by_traceA
Search logs by OpenTelemetry trace ID to see all logs related to a specific request/transaction.
| Name | Required | Description | Default |
|---|---|---|---|
| environment | Yes | Environment to search: 'dev'/'prod' (iOS) or 'android-dev'/'android-prod' (Android) | |
| traceId | Yes | The OpenTelemetry trace ID to search for | |
| size | No | Maximum number of results to return (default: 100) |
search_errorsC
Search for error logs, optionally filtered by service or additional query.
| Name | Required | Description | Default |
|---|---|---|---|
| environment | Yes | Environment to search: 'dev'/'prod' (iOS) or 'android-dev'/'android-prod' (Android) | |
| serviceName | No | Optional service name to filter by | |
| query | No | Additional free-text query to apply | |
| timeRange | No | Time range to search within (default: 1h) | |
| size | No | Maximum number of results to return (default: 50) |
search_logsA
Search OpenSearch logs with a free-text query. Supports Lucene query syntax. Examples: 'error AND authentication', 'status:500', 'message:timeout'
| Name | Required | Description | Default |
|---|---|---|---|
| environment | Yes | Environment to search: 'dev'/'prod' (iOS) or 'android-dev'/'android-prod' (Android) | |
| query | Yes | Free-text search query using Lucene syntax. Examples: 'error', 'status:500 AND service.name:auth' | |
| timeRange | No | Time range to search within. Defaults to 1h if not specified. | |
| size | No | Maximum number of results to return (default: 50, max: 200) |
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
8 tool updates
v1.0.0- First observed
get_field_values - First observed
get_mapping - First observed
get_sample_log - First observed
search_by_field - First observed
search_by_service - First observed
search_by_trace - First observed
search_errors - First observed
search_logs
TDQS
Scored across 8 tools
Most tools have distinct purposes, but there is some overlap between search_by_field, search_by_service, search_errors, and search_logs, which could cause confusion about which to use for specific filtering needs. However, the descriptions clarify their specialized roles, such as search_by_service for service filtering and search_errors for error-specific queries, reducing ambiguity.
All tool names follow a consistent verb_noun pattern with snake_case, such as get_field_values, search_by_trace, and search_logs. This uniformity makes the tool set predictable and easy to understand, enhancing usability for agents.
With 8 tools, the server is well-scoped for log analysis in OpenSearch, covering essential operations like discovery (get_field_values, get_mapping, get_sample_log) and various search methods. Each tool serves a clear purpose without feeling excessive or insufficient for the domain.
The tool set provides strong coverage for log querying and discovery, including field analysis, sample inspection, and multiple search types. A minor gap is the lack of tools for log management operations like deleting or exporting logs, but core workflows for analysis are well-supported.
Maintenance
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