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Log format

By Kong Inc.
You are browsing documentation for an outdated plugin version.

Looking for the plugin's configuration parameters? You can find them in the HTTP Log configuration reference doc.

Note: If the max_batch_size argument > 1, a request is logged as an array of JSON objects.

Log format

Every request is logged separately in a JSON object, separated by a new line \n, with the following format:

{
    "response": {
        "size": 9982,
        "headers": {
            "access-control-allow-origin": "*",
            "content-length": "9593",
            "date": "Thu, 19 Sep 2024 22:10:39 GMT",
            "content-type": "text/html; charset=utf-8",
            "via": "1.1 kong/3.8.0.0-enterprise-edition",
            "connection": "close",
            "server": "gunicorn/19.9.0",
            "access-control-allow-credentials": "true",
            "x-kong-upstream-latency": "171",
            "x-kong-proxy-latency": "1",
        },
        "status": 200
    },
    "route": {
        "updated_at": 1726782477,
        "tags": [],
        "response_buffering": true,
        "path_handling": "v0",
        "protocols": [
            "http",
            "https"
        ],
        "service": {
            "id": "fb4eecf8-dec2-40ef-b779-16de7e2384c7"
        },
        "https_redirect_status_code": 426,
        "regex_priority": 0,
        "name": "example_route",
        "id": "0f1a4101-3327-4274-b1e4-484a4ab0c030",
        "strip_path": true,
        "preserve_host": false,
        "created_at": 1726782477,
        "request_buffering": true,
        "ws_id": "f381e34e-5c25-4e65-b91b-3c0a86cfc393",
        "paths": [
            "/example-route"
        ]
    },
    "workspace": "f381e34e-5c25-4e65-b91b-3c0a86cfc393",
    "workspace_name": "default",
    "tries": [
        {
            "balancer_start": 1726783839539,
            "balancer_start_ns": 1.7267838395395e+18,
            "ip": "34.237.204.224",
            "balancer_latency": 0,
            "port": 80,
            "balancer_latency_ns": 27904
        }
    ],
    "client_ip": "192.168.65.1",
    "request": {
        "headers": {
            "accept": "*/*",
            "user-agent": "HTTPie/3.2.3",
            "host": "localhost:8000",
            "connection": "keep-alive",
            "accept-encoding": "gzip, deflate"
        },
        "uri": "/example-route",
        "size": 139,
        "method": "GET",
        "querystring": {},
        "url": "http://localhost:8000/example-route"
    },
    "started_at": 1726783839538,
    "upstream_status": "200",
    "latencies": {
        "kong": 1,
        "proxy": 171,
        "request": 173,
    },
    "service": {
        "write_timeout": 60000,
        "read_timeout": 60000,
        "updated_at": 1726782459,
        "host": "httpbin.konghq.com",
        "name": "example_service",
        "id": "fb4eecf8-dec2-40ef-b779-16de7e2384c7",
        "port": 80,
        "enabled": true,
        "created_at": 1726782459,
        "protocol": "http",
        "ws_id": "f381e34e-5c25-4e65-b91b-3c0a86cfc393",
        "connect_timeout": 60000,
        "retries": 5
    }
}

JSON object descriptions

  • service: Properties about the service associated with the requested route.
  • route: Properties about the specific route requested.
  • request: Properties about the request sent by the client.
  • response: Properties about the response sent to the client.

  • latencies: Latency data.

    • kong: The internal Kong Gateway latency, in milliseconds, that it takes to process the request. It varies based on the actual processing flow. Generally, it consists of three parts:
      • The time it took to find the right upstream.
      • The time it took to receive the whole response from upstream.
      • The time it took to run all plugins executed before the log phase.
    • request: The time in milliseconds that has elapsed between when the first bytes were read from the client and the last byte was sent to the client. This is useful for detecting slow clients.
    • proxy: The time in milliseconds that it took for the upstream to process the request. In other words, it’s the time elapsed between transferring the request to the final service and when Kong Gateway starts receiving the response.
  • tries: a list of iterations made by the load balancer for this request.
    • balancer_start: A Unix timestamp for when the balancer started.
    • ip: The IP address of the contacted balancer.
    • port: The port number of the contacted balancer.
    • balancer_latency: The latency of the balancer expressed in milliseconds.
  • client_ip: The original client IP address.
  • workspace: The UUID of the workspace associated with this request.
  • workspace_name: The name of the workspace associated with this request.
  • upstream_uri: The URI, including query parameters, for the configured upstream.
  • authenticated_entity: Properties about the authenticated credential (if an authentication plugin has been enabled).
  • consumer: The authenticated consumer (if an authentication plugin has been enabled).
  • started_at: The unix timestamp of when the request has started to be processed.

Log plugins enabled on services and routes contain information about the service or route.