Metrics: Generic Metrics

[jchauncey]

https://github.com/kubernetes/kubernetes/blob/6bac4fdc3713d7dd88777f0eaa9d0268f2771731/pkg/metrics/generic_metrics.go

Collect the following Generic kubernetes api metrics:

• get_token_count
• get_token_fail_count
• go_gc_duration_seconds
• go_gc_duration_seconds_count
• go_gc_duration_seconds_sum
• go_goroutines
• http_request_duration_microseconds
• http_request_duration_microseconds_count
• http_request_duration_microseconds_sum
• http_request_size_bytes
• http_request_size_bytes_count
• http_request_size_bytes_sum
• http_requests_total
• http_response_size_bytes
• http_response_size_bytes_count
• http_response_size_bytes_sum
• kubernetes_build_info
• process_cpu_seconds_total
• process_max_fds
• process_open_fds
• process_resident_memory_bytes
• process_start_time_seconds
• process_virtual_memory_bytes
• ssh_tunnel_open_count
• ssh_tunnel_open_fail_count

They use prometheus to expose this metrics so we should be able to use the telegraf prometheus client to poll that endpoint.

[jchauncey]

You gather these metrics via the api server endpoint

$ curl https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_SERIVCE_PORT/metrics --header "Authorization: Bearer $TOKEN" --insecure

Where $TOKEN is the service account token located at /var/run/secrets/kubernetes.io/serviceaccount/token