Kubernetes - Revision history

Kenneth: /* Internal Service URL */

2025-10-21T21:27:36Z

Internal Service URL

← Older revision		Revision as of 21:27, 21 October 2025
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	Describe a service:		Describe a service:
	kubectl -n test describe service/helloworldsvc		$ kubectl -n test describe service/helloworldsvc

	<pre>		<pre>

2025-10-21T21:27:28Z

Rolling Deployment

← Older revision		Revision as of 21:27, 21 October 2025
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	ref: https://kubernetes.io/docs/reference/kubectl/generated/kubectl_rollout/kubectl_rollout_restart/		ref: https://kubernetes.io/docs/reference/kubectl/generated/kubectl_rollout/kubectl_rollout_restart/

			== Internal Service URL ==

			Describe a service:
			kubectl -n test describe service/helloworldsvc

			<pre>
			Name: helloworldsvc
			Namespace: test
			...
			Port: http 9111/TCP
			...
			</pre>

			URL of service is in the format below:
			<service-name>.<namespace>.svc.cluster.local:<service-port>

			Example
			helloworldsvc.test.svc.cluster.local:9111


			reference: https://stackoverflow.com/questions/59558303/how-to-find-the-url-of-a-service-in-kubernetes

	== Sample Pod Configs ==		== Sample Pod Configs ==

2025-10-20T06:44:04Z

Kubectl config

2025-10-20T06:43:28Z

kubectl install

← Older revision		Revision as of 06:43, 20 October 2025
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	Download binary:		Download binary:
			mkdir -p ~/.src/kubectl ; cd ~/.src/kubectl
	curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"		curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"

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	Verify version:		Verify version:
	kubectl version		kubectl version # shows server version too, but will show error if server not configured
	kubectl version --client		kubectl version --client
	kubectl version --client --output=yaml		kubectl version --client --output=yaml
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	Bash completion:		Bash completion:
	# should already be installed...		# should already be installed...
	apt-get install bash-completion		sudo apt-get install bash-completion

	echo 'source <(kubectl completion bash)' >>~/.bashrc		echo 'source <(kubectl completion bash)' >>~/.bashrc
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	ref: [https://kubernetes.io/docs/tasks/tools/]		ref: [https://kubernetes.io/docs/tasks/tools/]

			Configuration:
			mkdir -p ~/.kube/
			touch ~/.kube/config

	== Kubectl config ==		== Kubectl config ==

2025-02-28T22:19:33Z

Persistent Volumes

← Older revision		Revision as of 22:19, 28 February 2025
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	* Persistent Volume - global		* Persistent Volume - global
	* Persistent Volumes Claims - tied to name space		* Persistent Volumes Claims - tied to name space

			=== Find Privileged Pods ===

			Looking for securityContext.privileged == true
			kubectl get pods --all-namespaces -o json \| jq -r '.items \| group_by(.metadata.namespace) \| map(select(length > 0) \| { (.[0].metadata.namespace): (map(select(.spec.containers \| any(.securityContext.privileged == true))) \| map(.metadata.name)) }) \| add'

	== Create Pod from Yaml ==		== Create Pod from Yaml ==

2024-08-21T06:08:38Z

kubectl install

← Older revision		Revision as of 06:08, 21 August 2024
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	echo 'alias k=kubectl' >>~/.bashrc		echo 'alias k=kubectl' >>~/.bashrc
	echo 'alias k8s=kubectl' >>~/.bashrc		echo 'alias k8s=kubectl' >>~/.bashrc
			echo 'alias k9=kubectl' >>~/.bashrc

			echo 'alias kw=kubectl' >>~/.bashrc
			echo 'alias k8sw=kubectl' >>~/.bashrc
			echo 'alias k9w=kubectl' >>~/.bashrc

	echo 'complete -o default -F __start_kubectl k' >>~/.bashrc		echo 'complete -o default -F __start_kubectl k' >>~/.bashrc
	echo 'complete -o default -F __start_kubectl k8s' >>~/.bashrc		echo 'complete -o default -F __start_kubectl k8s' >>~/.bashrc
	echo 'complete -o default -F __start_kubectl k9' >>~/.bashrc		echo 'complete -o default -F __start_kubectl k9' >>~/.bashrc

			echo 'complete -o default -F __start_kubectl kw' >>~/.bashrc
			echo 'complete -o default -F __start_kubectl k8sw' >>~/.bashrc
			echo 'complete -o default -F __start_kubectl k9w' >>~/.bashrc

	ref: [https://kubernetes.io/docs/tasks/tools/]		ref: [https://kubernetes.io/docs/tasks/tools/]

2024-08-21T06:04:18Z

kubectl install

← Older revision		Revision as of 06:04, 21 August 2024
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	echo 'complete -o default -F __start_kubectl k' >>~/.bashrc		echo 'complete -o default -F __start_kubectl k' >>~/.bashrc
	echo 'complete -o default -F __start_kubectl k8s' >>~/.bashrc		echo 'complete -o default -F __start_kubectl k8s' >>~/.bashrc
			echo 'complete -o default -F __start_kubectl k9' >>~/.bashrc

	ref: [https://kubernetes.io/docs/tasks/tools/]		ref: [https://kubernetes.io/docs/tasks/tools/]

2024-08-21T06:02:20Z

kubectl install

← Older revision		Revision as of 06:02, 21 August 2024
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	Verify version:		Verify version:
			kubectl version
	kubectl version --client		kubectl version --client
	kubectl version --client --output=yaml		kubectl version --client --output=yaml

			Make backup, in case you need previous version to match Kube cluster:
			ls -la /usr/local/bin/kubectl*
			sudo cp /usr/local/bin/kubectl /usr/local/bin/kubectl-1.31.0 # match version
			ls -la /usr/local/bin/kubectl*

	Bash completion:		Bash completion:

2024-07-04T04:20:03Z

Get YAML from Object

← Older revision		Revision as of 04:20, 4 July 2024
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	Get YAML for deployed Kubernetes services? - Stack Overflow		Get YAML for deployed Kubernetes services? - Stack Overflow
	https://stackoverflow.com/questions/43941772/get-yaml-for-deployed-kubernetes-services		https://stackoverflow.com/questions/43941772/get-yaml-for-deployed-kubernetes-services

			== Rolling Deployment ==

			kubectl rollout restart deployment -n test-namespace

			ref: https://kubernetes.io/docs/reference/kubectl/generated/kubectl_rollout/kubectl_rollout_restart/

	== Sample Pod Configs ==		== Sample Pod Configs ==

2024-07-03T22:27:51Z

= Label Node

← Older revision		Revision as of 22:27, 3 July 2024
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	ci-infra-01 Ready <none> 83d v1.22.2 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=ci-infra-01,kubernetes.io/os=linux		ci-infra-01 Ready <none> 83d v1.22.2 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=ci-infra-01,kubernetes.io/os=linux

	==== Label Node ===		==== Label Node ====

	# kubectl label nodes <node-name> <label-key>=<label-value>		# kubectl label nodes <node-name> <label-key>=<label-value>