Kubernetes Metrics Server Operations: Difference between revisions
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=Installation= | =Installation= | ||
{{External|https://github.com/kubernetes-sigs/metrics-server#requirements}} | {{External|https://github.com/kubernetes-sigs/metrics-server#requirements}} | ||
==With Helm== | |||
{{External|https://github.com/helm/charts/tree/master/stable/metrics-server}} | |||
Can be installed directly from the "stable" repository: | |||
<syntaxhighlight lang='bash'> | |||
helm install metrics-server stable/metrics-server --set args="{--kubelet-insecure-tls,--cert-dir=/tmp}" | |||
</syntaxhighlight> | |||
Alternatively, the chart can be built locally with with 'helm package ./metrics-server', then installed with: | |||
<syntaxhighlight lang='bash'> | |||
helm install metrics-server ./metrics-server-2.11.2.tgz -f ./values.yaml | |||
</syntaxhighlight> | |||
where values.yaml: | |||
<syntaxhighlight lang='yaml'> | |||
image: | |||
repository: k8s.gcr.io/metrics-server/metrics-server | |||
tag: v0.3.7 | |||
args: | |||
- --kubelet-insecure-tls | |||
- --cert-dir=/tmp | |||
</syntaxhighlight> | |||
==With Manifest== | ==With Manifest== | ||
===Docker Desktop Kubernetes=== | ===Docker Desktop Kubernetes=== | ||
====Install==== | ====Install==== | ||
<syntaxhighlight lang='text'> | <syntaxhighlight lang='text'> | ||
kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/download/v0. | kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.4.1/components.yaml | ||
</syntaxhighlight> | </syntaxhighlight> | ||
By default, metrics-server is deployed in "kube-system" namespace, without being necessary to use "-n kube-system": | |||
<syntaxhighlight lang='text'> | |||
kubectl -n kube-system get pods | |||
NAME READY STATUS RESTARTS AGE | |||
metrics-server-866b7d5b74-845tb 1/1 Running 0 15s | |||
</syntaxhighlight> | |||
The up-to-date release list can be found here: https://github.com/kubernetes-sigs/metrics-server/tags | |||
If configuration needs to be changed, pull the file locally and install it with: | If configuration needs to be changed, pull the file locally and install it with: | ||
<syntaxhighlight lang='text'> | <syntaxhighlight lang='text'> | ||
| Line 31: | Line 64: | ||
clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server created | clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server created | ||
</syntaxhighlight> | </syntaxhighlight> | ||
====Configuration==== | ====Configuration==== | ||
For Docker Desktop Kubernetes, add "--kubelet-insecure-tls", otherwise the pod reads will fail with: | For Docker Desktop Kubernetes, add "--kubelet-insecure-tls", otherwise the pod reads will fail with: | ||
| Line 57: | Line 90: | ||
===EKS=== | ===EKS=== | ||
{{External|https://docs.aws.amazon.com/eks/latest/userguide/horizontal-pod-autoscaler.html}} | {{External|https://docs.aws.amazon.com/eks/latest/userguide/horizontal-pod-autoscaler.html}} | ||
=Installation Validation= | =Installation Validation= | ||
{{Internal|kubectl top|kubectl top}} | {{Internal|kubectl top|kubectl top}} | ||
Latest revision as of 01:14, 3 February 2021
External
Internal
Help
docker run --rm k8s.gcr.io/metrics-server/metrics-server:v0.3.7 --help
Installation
With Helm
Can be installed directly from the "stable" repository:
helm install metrics-server stable/metrics-server --set args="{--kubelet-insecure-tls,--cert-dir=/tmp}"
Alternatively, the chart can be built locally with with 'helm package ./metrics-server', then installed with:
helm install metrics-server ./metrics-server-2.11.2.tgz -f ./values.yaml
where values.yaml:
image:
repository: k8s.gcr.io/metrics-server/metrics-server
tag: v0.3.7
args:
- --kubelet-insecure-tls
- --cert-dir=/tmp
With Manifest
Docker Desktop Kubernetes
Install
kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.4.1/components.yaml
By default, metrics-server is deployed in "kube-system" namespace, without being necessary to use "-n kube-system":
kubectl -n kube-system get pods
NAME READY STATUS RESTARTS AGE
metrics-server-866b7d5b74-845tb 1/1 Running 0 15s
The up-to-date release list can be found here: https://github.com/kubernetes-sigs/metrics-server/tags
If configuration needs to be changed, pull the file locally and install it with:
kubectl apply -f ./components.yaml
clusterrole.rbac.authorization.k8s.io/system:aggregated-metrics-reader created
clusterrolebinding.rbac.authorization.k8s.io/metrics-server:system:auth-delegator created
rolebinding.rbac.authorization.k8s.io/metrics-server-auth-reader created
apiservice.apiregistration.k8s.io/v1beta1.metrics.k8s.io created
serviceaccount/metrics-server created
deployment.apps/metrics-server created
service/metrics-server created
clusterrole.rbac.authorization.k8s.io/system:metrics-server created
clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server created
Configuration
For Docker Desktop Kubernetes, add "--kubelet-insecure-tls", otherwise the pod reads will fail with:
x509: certificate signed by unknown authority
kind: Deployment
metadata:
name: metrics-server
spec:
template:
spec:
containers:
- name: metrics-server
args:
- --kubelet-insecure-tls
- --cert-dir=/tmp
- --secure-port=4443
Uninstall
Uninstall all the Kubernetes API resources. To reconfigure, it is sufficient to uninstall then re-install the deployment.