Kube apiserver Stats

Version history

Initial version, v1.8.8

There might be a (non reported yet) issue with this version due to the label code missing. Beats 7.4 should solve the issue.
June 2019, v1.14.3

apiserver_request_total will be used in spite of apiserver_request_count. An ugly trick has been put in place that will read both values, using apiserver_request_total if exists. The deprecated value is being configured under the bogus name request.beforev14.count and renamed to request.count if the newer does not exists.

Resources

apiserver_request_latencies - component - group - resource - scope - subresource - verb - version

apiserver_request_duration_seconds_bucket - component - dry_run - group - resource - scope - subresource - verb - version

apiserver_request_total - client - code. Note: this one was not being added at previous. - component - contentType - dry_run - resource - scope - subresource - verb - version

apiserver_longrunning_gauge - component - group - resource - scope - subresource - verb - version

etcd_object_counts - resource

apiserver_current_inflight_requests - requestKind

apiserver_audit_event_total

apiserver_audit_requests_rejected_total

Generating expectation files

In order to support a new Kubernetes releases you'll have to generate new expectation files for this module in _meta/test. For that, start by deploying a new kubernetes cluster on the required Kubernetes version, for example:

bash

kind create cluster --image kindest/node:v1.32.0

After that, you can apply the kubernetes.yml file from the root of the kubernetes module:

bash

kubectl apply -f kubernetes.yml

This is required since accessing the apiserver metrics requires additional permissions.

Next, expose the apiserver api:

bash

kubectl port-forward -n kube-system pod/kube-apiserver-kind-control-plane 6443

Then you can fetch the metrics from the url provided in the output and save it to a new _meta/test/metrics.x.xx file.

bash

curl -k https://localhost:6443/metrics > _meta/test/metrics.x.xx

Run the following commands to generate and test the expected files:

bash

cd metricbeat/module/kubernetes/apiserver
# generate the expected files
go test ./... --data
# test the expected files
go test ./...