Kubernetes - Revision history

Xbl at 13:23, 28 January 2026

2026-01-28T13:23:04Z

← Older revision		Revision as of 15:23, 28 January 2026
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	preemptionPolicy: PreemtLowerPriority (default)/ never (optional)</nowiki>		preemptionPolicy: PreemtLowerPriority (default)/ never (optional)</nowiki>
	Assign by setting priorityClassName in pod definition under spec.		Assign by setting priorityClassName in pod definition under spec.

			=== Admission Controllers ===
			<code>ps -ef \| grep admission</code> Show info about admission plugins

			=== Performance and Monitoring ===
			<nowiki>kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml
			serviceaccount/metrics-server created</nowiki>

			<code>kubectl top <pod/node></code>

			=== Logs ===
			<code>kubectl logs <pod/node></code>

2026-01-27T15:54:47Z

← Older revision		Revision as of 17:54, 27 January 2026
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	matchLabels:		matchLabels:
	app: monitoring-agent</nowiki>		app: monitoring-agent</nowiki>

			=== Priority Classes ===
			System range: 2'147'483'648 - 2'000'000'000</br>
			Usable range: 1'000'000'000 - -2'147'483'648</br>
			<nowiki>apiVersion: scheduling.k8s.io/v1
			kind: PriorityClass
			metadata:
			name: high-priority
			value: 1000000000
			description: "Priority class for mission critical pods" (optional)
			globalDefault: true (optional)
			preemptionPolicy: PreemtLowerPriority (default)/ never (optional)</nowiki>
			Assign by setting priorityClassName in pod definition under spec.

2026-01-27T13:44:20Z

@@ Line 70: / Line 70: @@
    replicas: 3</nowiki>
-=== Example .yaml for Replica Set ===
+=== Example .yaml for ReplicaSet ===
 This configuration defines a replica set for the example "myapp-pod" nginx pod.
   <nowiki>apiVersion: apps/v1
@@ Line 233: / Line 233: @@
      limits.cpu: 10
      limits.memory: 10Gi</nowiki>

2026-01-27T12:44:42Z

@@ Line 13: / Line 13: @@
 <code>kubectl run <pod-name> --image=nginx</code> Run new nginx pod</br>
 <code>kubectl create -f <defintion.yaml></code> Create new object from <definition.yaml> file</br>
 === describe/edit/delete ===
 <code>kubectl describe pod <pod-name></code> Describe pod</br>
@@ Line 21: / Line 22: @@
 === explain ===
 <code>kubectl explain <something></code> Explain <something>
 == Kubernetes Definition Files ==
@@ Line 152: / Line 155: @@
 === Taint ===
 <code>kubectl taint node node01 key=value:NoSchedule</code> Add some taint to node01

2026-01-27T11:39:35Z

Kubernetes Definition Files

← Older revision		Revision as of 13:39, 27 January 2026
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	== Kubernetes Definition Files ==		== Kubernetes Definition Files ==
			“Can I have more than one of these?”</br>
			Yes → use -</br>
			No → don’t use -</br>
	=== Example .yaml for Pod ===		=== Example .yaml for Pod ===
	This configuration defines a pod named "myapp-pod" that runs a single container using the nginx image.</br>		This configuration defines a pod named "myapp-pod" that runs a single container using the nginx image.</br>

2026-01-27T10:30:12Z

← Older revision		Revision as of 12:30, 27 January 2026
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	type: front-end		type: front-end
	spec:		spec:
			tolerations:
			- key: "spray"
			operator: "Equal"
			value: "mortein"
			effect: "NoSchedule"
	containers:		containers:
	- name: nginx-container		- name: nginx-container
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	<code>kubectl scale deployment nginx --replicas=5</code></br>		<code>kubectl scale deployment nginx --replicas=5</code></br>
	<code>kubectl set image deployment nginx nginx=nginx:1.18</code></br>		<code>kubectl set image deployment nginx nginx=nginx:1.18</code></br>

			=== Taint ===
			<code>kubectl taint node node01 key=value:NoSchedule</code> Add some taint to node01

2026-01-26T15:22:15Z

get

← Older revision		Revision as of 17:22, 26 January 2026
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	<code>kubectl explain <pods> --recursive</code> Explain something		<code>kubectl explain <pods> --recursive</code> Explain something
	=== get ===		=== get ===
	<code>kubectl get <all/pods/replicationcontroller/replicaset/deployment/ns/svc</code> Show all/replicationcontroller/replicaset/deployment/namespace/service objects</br>		<code>kubectl get <all/pods/replicationcontroller/replicaset/deployment/ns/svc/nodes</code> Show all/replicationcontroller/replicaset/deployment/namespace/service objects</br>
	<code>kubectl get pods -o wide</code> Show all pods with more info</br>		<code>kubectl get pods -o wide</code> Show all pods with more info</br>

	=== run/create ===		=== run/create ===
	<code>kubectl run <pod-name> --image=nginx</code> Run new nginx pod</br>		<code>kubectl run <pod-name> --image=nginx</code> Run new nginx pod</br>

2026-01-26T14:23:30Z

Imperative Commands

← Older revision		Revision as of 16:23, 26 January 2026
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	== Imperative Commands ==		== Imperative Commands ==
	Can be tested with <code>--dry-run=client</code></br>		Can be tested with: <code>--dry-run=client</code></br>
	<code>kubectl run --image=nginx nginx</code></br>		<code>kubectl run --image=nginx nginx</code></br>
	<code>kubectl create deployment --image=nginx nginx</code></br>		<code>kubectl create deployment --image=nginx nginx</code></br>

2026-01-26T14:23:12Z

@@ Line 2: / Line 2: @@
 == kubectl ==
 === get ===
 <code>kubectl get <all/pods/replicationcontroller/replicaset/deployment/ns/svc</code> Show all/replicationcontroller/replicaset/deployment/namespace/service objects</br>
 <code>kubectl get pods -o wide</code> Show all pods with more info</br>
 === run/create ===
 <code>kubectl run <pod-name> --image=nginx</code> Run new nginx pod</br>
@@ Line 131: / Line 131: @@
      limit.cpu: "10"
      limit.memory: 10Gi</nowiki>

2026-01-26T14:06:20Z

get

← Older revision		Revision as of 16:06, 26 January 2026
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	== kubectl ==		== kubectl ==
	=== get ===		=== get ===
	<code>kubectl get <all/pods/replicationcontroller/replicaset/deployment/ns</code> Show all/replicationcontroller/replicaset/deployment objects</br>		<code>kubectl get <all/pods/replicationcontroller/replicaset/deployment/ns/svc</code> Show all/replicationcontroller/replicaset/deployment/namespace/service objects</br>
	<code>kubectl get pods -o wide</code> Show all pods with more info</br>		<code>kubectl get pods -o wide</code> Show all pods with more info</br>
	</br>		</br>