Collector Type: Agent
Category: Application Monitors
Application Name: k8s API server
Global Template Name: K3s ApiServer
Introduction
The Kubernetes apiserver validates and configures data for the api objects which include pods, services, replicationcontrollers, and others. The kube-apiserver services the REST operations and provides the frontend to the cluster shared state through which all other components interact.
By default, the kube-apiserver runs on port 6443 and exposes the metrics of /metrics in openMetric format. The Agent hits the endpoint with the kubernetes client and fetches the metrics automatically. Therefore. no extra configuration or detection logic is required.
Validate
Go to Resources under the Infrastructure tab to check if your resources are onboarded and the metrics are collected.
Collected Metrics
| Metric Name | Display Name | Description |
|---|---|---|
| apiserver.go.threads.total | Kube apiserver Go Threads Total | Number of OS threads created. |
| apiserver.authenticated.user.requests | Kube apiserver Authenticated User Requests | Counter of authenticated requests broken out by username. |
| apiserver.http.requests.total.count | Kube apiserver HTTP Requests Total Count | Total number of HTTP requests made. |
| apiserver.authenticated.user.requests.count | Kube apiserver Authenticated User Requests Count | Counter of authenticated requests broken out by username. |
| docker_container_size-rootfs-95percentile | Root Filesystem Size 95Percentile | 95th percentile of docker.container.size_rootfs. |
| apiserver.dropped.requests.total | Kube apiserver Dropped Requests Total | Accumulated number of requests dropped with Try-again-later response. |
| apiserver.http.requests.total | Kube apiserver HTTP Requests Total | Total number of HTTP requests made. |
| apiserver.audit.event.total | Kube apiserver Audit Event Total | Counter of audit events generated and sent to the audit backend. |
| apiserver.rest.client.requests.total | Kube apiserver Rest Client Requests Total | Number of HTTP requests, partitioned by status code, method, and host. |
| apiserver.request.count | Kube apiserver Request Count | Counter of apiserver requests broken out for each verb, group, version, resource, scope, component, client, and HTTP response contentType and code. |
| apiserver.request.count.count | Kube apiserver Request Count Count | Counter of apiserver requests broken out for each verb, group, version, resource, scope, component, client, and HTTP response contentType and code. |
| apiserver.dropped.requests.total.count | Kube apiserver Dropped Requests Total Count | Monotonic count of requests dropped with Try-again-later response. |
| apiserver.inflight.requests | Kube apiserver Inflight Requests | Maximal number of currently used inflight request limit of this apiserver per request kind in last second. |
| apiserver.go.goroutines | Kube apiserver Goroutines | Number of goroutines that currently exist. |
| apiserver.APIServiceRegistrationController.depth | Kube apiserver APIService Registration Controller Depth | Current depth of workqueue: APIServiceRegistrationController. |
| apiserver.etcd.object.counts | Kube apiserver ETCD Object Counts | Number of stored objects at the time of last check split by kind. |
| apiserver.rest.client.requests.total.count | Kube apiserver Rest Client Requests Total Count | Number of HTTP requests, partitioned by status code, method, and host. |