Metrics Server - Revision history

DrEdWilliams at 23:37, 7 November 2020

2020-11-07T23:37:20Z

← Older revision		Revision as of 23:37, 7 November 2020
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	== Installation ==		== Installation ==
	There is a helm chart (untested), but the deployment is very straightforward using the [https://github.com/kubernetes-incubator/metrics-server GitHub] repository:		There is a helm chart (untested), but the deployment is very straightforward using the consolidated manifest from the [https://github.com/kubernetes-incubator/metrics-server GitHub] repository:
	~~git clone~~ https://github.com/kubernetes-~~incubator~~/metrics-server.~~git~~		wget https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.4.0/components.yaml

	Due to the fact that the default '''kubeadm''' installation uses self-signed certificates for the kubelets (not certificated signed by the main CA for the cluster), one minor change needs to be made to the deployment if this is being applied to an existing cluster. Modify the file '''metrics-server/manifests/base/deployment.yaml''', adding the '''--kubelet-insecure-tls''' argument to the containers spec so that it looks like this<ref>https://github.com/kubernetes-incubator/metrics-server/issues/146#issuecomment-430483619</ref>:		Due to the fact that the default '''kubeadm''' installation uses self-signed certificates for the kubelets (not certificated signed by the main CA for the cluster), one minor change needs to be made to the deployment if this is being applied to an existing cluster. Modify the file '''metrics-server/manifests/base/deployment.yaml''', adding the '''--kubelet-insecure-tls''' argument to the containers spec so that it looks like this<ref>https://github.com/kubernetes-incubator/metrics-server/issues/146#issuecomment-430483619</ref>:
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	Deploy the metrics server:		Deploy the metrics server:
	kubectl apply -f ~~metrics-server/manifests/base/~~		kubectl apply -f components.yaml

	Note that ~~these manifests are~~ also in the k8s-admin/metrics-server directory in the GitLab repository ...		Note that the manifest is also in the k8s-admin/metrics-server directory in the GitLab repository ...

	----		----

	<references/>		<references/>

DrEdWilliams at 01:41, 27 August 2020

2020-08-27T01:41:24Z

← Older revision		Revision as of 01:41, 27 August 2020
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	This tells the metrics server to ignore the fact that the certificates are self-signed -- in general, not the best solution, but as it is totally within the cluster, the exposure is minimal.		This tells the metrics server to ignore the fact that the certificates are self-signed -- in general, not the best solution, but as it is totally within the cluster, the exposure is minimal.

			Also in this file, you need to change the 'MaxUnavailable' parameter from '0' to '1' -- otherwise, this deployment cannot be evicted and will hang up a cluster upgrade.

	Deploy the metrics server:		Deploy the metrics server:
	kubectl apply -f metrics-server/manifests/base/		kubectl apply -f metrics-server/manifests/base/

	Note that these manifests are in the k8s-admin/metrics-server directory in the GitLab repository ...		Note that these manifests are also in the k8s-admin/metrics-server directory in the GitLab repository ...

	----		----

	<references/>		<references/>

DrEdWilliams at 23:50, 1 August 2020

2020-08-01T23:50:42Z

← Older revision		Revision as of 23:50, 1 August 2020
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	git clone https://github.com/kubernetes-incubator/metrics-server.git		git clone https://github.com/kubernetes-incubator/metrics-server.git

	Due to the fact that the default '''kubeadm''' installation uses self-signed certificates for the kubelets (not certificated signed by the main CA for the cluster), one minor change needs to be made to the deployment if this is being applied to an existing cluster. Modify the file '''metrics-server/~~deploy~~/~~1.8+~~/~~metrics-server-~~deployment.yaml''', adding the '''--kubelet-insecure-tls''' argument to the containers spec so that it looks like this<ref>https://github.com/kubernetes-incubator/metrics-server/issues/146#issuecomment-430483619</ref>:		Due to the fact that the default '''kubeadm''' installation uses self-signed certificates for the kubelets (not certificated signed by the main CA for the cluster), one minor change needs to be made to the deployment if this is being applied to an existing cluster. Modify the file '''metrics-server/manifests/base/deployment.yaml''', adding the '''--kubelet-insecure-tls''' argument to the containers spec so that it looks like this<ref>https://github.com/kubernetes-incubator/metrics-server/issues/146#issuecomment-430483619</ref>:
	<pre> containers:		<pre> containers:
	- name: metrics-server		- name: metrics-server
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	Deploy the metrics server:		Deploy the metrics server:
	kubectl apply -f metrics-server/manifests/base/		kubectl apply -f metrics-server/manifests/base/

			Note that these manifests are in the k8s-admin/metrics-server directory in the GitLab repository ...

	----		----

	<references/>		<references/>

DrEdWilliams at 14:46, 12 July 2020

2020-07-12T14:46:40Z

← Older revision		Revision as of 14:46, 12 July 2020
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	Deploy the metrics server:		Deploy the metrics server:
	kubectl apply -f metrics-server/~~deploy~~/~~1.8+~~/		kubectl apply -f metrics-server/manifests/base/

	----		----

	<references/>		<references/>

10.0.0.54 at 22:47, 25 December 2019

2019-12-25T22:47:56Z

← Older revision		Revision as of 22:47, 25 December 2019
Line 5:		Line 5:
	git clone https://github.com/kubernetes-incubator/metrics-server.git		git clone https://github.com/kubernetes-incubator/metrics-server.git

	Due to the fact that the default '''kubeadm''' installation uses self-signed certificates for the kubelets (not certificated signed by the main CA for the cluster), one minor change needs to be made to the deployment if this is being applied to an existing cluster. Modify the file '''metrics-server/deploy/1.8+/metrics-server-deployment.yaml''', adding the '''~~command:~~''' ~~section~~ to the containers spec so that it looks like this<ref>https://github.com/kubernetes-incubator/metrics-server/issues/146#issuecomment-430483619</ref>:		Due to the fact that the default '''kubeadm''' installation uses self-signed certificates for the kubelets (not certificated signed by the main CA for the cluster), one minor change needs to be made to the deployment if this is being applied to an existing cluster. Modify the file '''metrics-server/deploy/1.8+/metrics-server-deployment.yaml''', adding the '''--kubelet-insecure-tls''' argument to the containers spec so that it looks like this<ref>https://github.com/kubernetes-incubator/metrics-server/issues/146#issuecomment-430483619</ref>:
	<pre> containers:		<pre> containers:
	- name: metrics-server		- name: metrics-server
	image: k8s.gcr.io/metrics-server-amd64:v0.x.x		image: k8s.gcr.io/metrics-server-amd64:v0.x.x
	imagePullPolicy: Always		imagePullPolicy: Always
	~~command~~:		args:
	- /~~metrics~~-~~server~~		- --cert-dir=/tmp
	- --kubelet-insecure-tls		- --secure-port=4443
			- --kubelet-insecure-tls
	volumeMounts:		volumeMounts:
	- name: tmp-dir		- name: tmp-dir

DrEdWilliams at 12:28, 25 December 2019

2019-12-25T12:28:45Z

← Older revision		Revision as of 12:28, 25 December 2019
Line 8:		Line 8:
	<pre> containers:		<pre> containers:
	- name: metrics-server		- name: metrics-server
	image: k8s.gcr.io/metrics-server-amd64:v0.3.3		image: k8s.gcr.io/metrics-server-amd64:v0.x.x
	imagePullPolicy: Always		imagePullPolicy: Always
	command:		command:

DrEdWilliams: Created page with "Kubernetes provides for metrics collection on performance/capacity of nodes, pods, etc. Previously, this was done by the Heapster application, but that is now deprecated in f..."

2019-08-03T01:02:53Z

Created page with "Kubernetes provides for metrics collection on performance/capacity of nodes, pods, etc. Previously, this was done by the Heapster application, but that is now deprecated in f..."

New page

Kubernetes provides for metrics collection on performance/capacity of nodes, pods, etc. Previously, this was done by the Heapster application, but that is now deprecated in favor of an internal metrics server. This capability is still in kubernetes incubator status, but it provides a significant capability at this time.

== Installation ==
There is a helm chart (untested), but the deployment is very straightforward using the [https://github.com/kubernetes-incubator/metrics-server GitHub] repository:
git clone https://github.com/kubernetes-incubator/metrics-server.git

Due to the fact that the default '''kubeadm''' installation uses self-signed certificates for the kubelets (not certificated signed by the main CA for the cluster), one minor change needs to be made to the deployment if this is being applied to an existing cluster. Modify the file '''metrics-server/deploy/1.8+/metrics-server-deployment.yaml''', adding the '''command:''' section to the containers spec so that it looks like this<ref>https://github.com/kubernetes-incubator/metrics-server/issues/146#issuecomment-430483619</ref>:
<pre> containers:
- name: metrics-server
image: k8s.gcr.io/metrics-server-amd64:v0.3.3
imagePullPolicy: Always
command:
- /metrics-server
- --kubelet-insecure-tls
volumeMounts:
- name: tmp-dir
mountPath: /tmp</pre>

This tells the metrics server to ignore the fact that the certificates are self-signed -- in general, not the best solution, but as it is totally within the cluster, the exposure is minimal.

Deploy the metrics server:
kubectl apply -f metrics-server/deploy/1.8+/

----

<references/>