etsangsplk / instrumented_http

A Go http.RoundTripper that exports request statistics via Prometheus.

instrumented_http

A Go http.RoundTripper that exports request statistics via Prometheus.

Example

Transparently inject instrumented_http into any http.Client or http.RoundTripper and get metrics about all requests made.

$ curl -Ss 127.0.0.1:9099/metrics | grep http
http_request_duration_seconds{handler="instrumented_http",host="my-cluster.example.org",method="GET",path="pods",query="",scheme="https",status="200",quantile="0.5"} 0.83626
http_request_duration_seconds{handler="instrumented_http",host="my-cluster.example.org",method="GET",path="pods",query="",scheme="https",status="200",quantile="0.9"} 0.736648
http_request_duration_seconds{handler="instrumented_http",host="my-cluster.example.org",method="GET",path="pods",query="",scheme="https",status="200",quantile="0.99"} 0.736648
http_request_duration_seconds_sum{handler="instrumented_http",host="my-cluster.example.org",method="GET",path="pods",query="",scheme="https",status="200"} 0.820274243
http_request_duration_seconds_count{handler="instrumented_http",host="my-cluster.example.org",method="GET",path="pods",query="",scheme="https",status="200"} 2

Usage

Browse the examples directory to see how instrumented_http works with:

• http.DefaultClient: examples/default-client
• a custom http.Transport: examples/custom-transport
• the Google CloudDNS client: examples/googledns
• the AWS Route53 client: examples/route53
• the Kubernetes client: examples/kubernetes
• Resty: examples/resty
• Sling: examples/sling
• Gentleman: examples/gentleman