host.json Reference¶

Host-level runtime settings for .NET isolated worker function apps.

flowchart TD
    A[Configuration] --> B[Build]
    B --> C[Deploy]
    C --> D[Observe]

Topic/Command Groups¶

Baseline host.json¶

{
  "version": "2.0",
  "functionTimeout": "00:10:00",
  "logging": {
    "applicationInsights": {
      "samplingSettings": {
        "isEnabled": true,
        "maxTelemetryItemsPerSecond": 20
      }
    }
  },
  "extensions": {
    "http": {
      "routePrefix": "api"
    },
    "queues": {
      "batchSize": 16,
      "maxDequeueCount": 5
    }
  }
}

Key settings¶

• functionTimeout: execution limit per invocation
• extensions.http.routePrefix: HTTP route prefix
• extensions.queues.maxDequeueCount: poison handling threshold

See Also¶

• .NET Language Guide
• .NET Runtime
• .NET Isolated Worker Model
• Recipes Index

Sources¶

• Azure Functions .NET isolated worker guide
• Azure Functions host.json reference