Note that everything is experimental and may change significantly at any time.
This repository collects Kubernetes manifests, Grafana dashboards, and Prometheus rules combined with documentation and scripts to provide easy to operate end-to-end Kubernetes cluster monitoring with Prometheus using the Prometheus Operator.
The content of this project is written in jsonnet. This project could both be described as a package as well as a library.
Components included in this package:
This stack is meant for cluster monitoring, so it is pre-configured to collect metrics from all Kubernetes components. In addition to that it delivers a default set of dashboards and alerting rules. Many of the useful dashboards and alerts come from the kubernetes-mixin project, similar to this project it provides composable jsonnet as a library for users to customize to their needs.
You will need a Kubernetes cluster, that's it! By default it is assumed, that the kubelet uses token authentication and authorization, as otherwise Prometheus needs a client certificate, which gives it full access to the kubelet, rather than just the metrics. Token authentication and authorization allows more fine grained and easier access control.
This means the kubelet configuration must contain these flags:
--authentication-token-webhook=trueThis flag enables, that a
ServiceAccounttoken can be used to authenticate against the kubelet(s). This can also be enabled by setting the kubelet configuration value
--authorization-mode=WebhookThis flag enables, that the kubelet will perform an RBAC request with the API to determine, whether the requesting entity (Prometheus in this case) is allowed to access a resource, in specific for this project the
/metricsendpoint. This can also be enabled by setting the kubelet configuration value
This stack provides resource metrics by deploying the Prometheus Adapter. This adapter is an Extension API Server and Kubernetes needs to be have this feature enabled, otherwise the adapter has no effect, but is still deployed.
The following Kubernetes versions are supported and work as we test against these versions in their respective branches. But note that other versions might work!
|kube-prometheus stack||Kubernetes 1.19||Kubernetes 1.20||Kubernetes 1.21||Kubernetes 1.22||Kubernetes 1.23|
Note: For versions before Kubernetes v1.21.z refer to the Kubernetes compatibility matrix in order to choose a compatible branch.
This project is intended to be used as a library (i.e. the intent is not for you to create your own modified copy of this repository).
Though for a quickstart a compiled version of the Kubernetes manifests generated with this library (specifically with
example.jsonnet) is checked into this repository in order to try the content out quickly. To try out the stack un-customized run:
# Create the namespace and CRDs, and then wait for them to be available before creating the remaining resources kubectl apply --server-side -f manifests/setup until kubectl get servicemonitors --all-namespaces ; do date; sleep 1; echo ""; done kubectl apply -f manifests/
We create the namespace and CustomResourceDefinitions first to avoid race conditions when deploying the monitoring components.
Alternatively, the resources in both folders can be applied with a single command
kubectl apply --server-side -f manifests/setup -f manifests, but it may be necessary to run the command multiple times for all components to
be created successfully.
kubectl delete --ignore-not-found=true -f manifests/ -f manifests/setup
To try out this stack, start minikube with the following command:
$ minikube delete && minikube start --kubernetes-version=v1.23.0 --memory=6g --bootstrapper=kubeadm --extra-config=kubelet.authentication-token-webhook=true --extra-config=kubelet.authorization-mode=Webhook --extra-config=scheduler.bind-address=0.0.0.0 --extra-config=controller-manager.bind-address=0.0.0.0
The kube-prometheus stack includes a resource metrics API server, so the metrics-server addon is not necessary. Ensure the metrics-server addon is disabled on minikube:
$ minikube addons disable metrics-server
Before deploying kube-prometheus in a production environment, read:
To contribute to kube-prometheus, refer to Contributing.
If you have any questions or feedback regarding kube-prometheus, join the kube-prometheus discussion. Alternatively, consider joining the kubernetes slack #prometheus-operator channel or project's bi-weekly Contributor Office Hours.
Apache License 2.0, see LICENSE.