Difference between revisions of "Pod (Kubernetes)"
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↑ https://kubernetes.io/docs/concepts/workloads/pods/pod/
↑ https://en.wikipedia.org/wiki/Kubernetes#Pods
↑ https://kubernetes.io/docs/concepts/workloads/controllers/replicaset/
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| − | Kubernetes Pods<ref>https://kubernetes.io/docs/concepts/workloads/pods/pod/</ref><ref>https://en.wikipedia.org/wiki/Kubernetes#Pods</ref> are the smallest deployable units | + | Kubernetes Pods <ref>https://kubernetes.io/docs/concepts/workloads/pods/pod/</ref><ref>https://en.wikipedia.org/wiki/Kubernetes#Pods</ref> are the smallest deployable units that allows to deploy one or multiple [[containers]] as a single atomic unit. Pods are defined using <code>[[YAML]]</code> files and applied with <code>[[kubectl apply]]</code> command. |
| + | |||
| + | == Pod related commands == | ||
| + | * <code>[[kubectl apply]]</code> | ||
| + | * <code>[[kubectl create]] -f [[mypod.yml]]</code> | ||
| + | * Get a list of pods: | ||
| + | ::: <code>[[kubectl get pods]]</code> | ||
| + | * <code>[[kubectl get pod]] MY_POD_NAME</code> | ||
| + | * <code>[[kubectl delete]] pod MY_POD_NAME</code> | ||
| + | * <code>[[kubectl top pod]] PODNAME</code> | ||
| + | * Get more information about a pod: | ||
| + | :::<code>[[kubectl describe]] pod MY_POD_NAME</code> | ||
| + | * List all container by pod: | ||
| + | ::<code>[[kubectl get pods]] -o [[jsonpath]]='{range .items[*]}{"pod: "}{.metadata.name}{"\n"}{range .spec.containers[*]}{"\tname: "}{.name}{"\n\timage: "}{.image}{"\n"}{end}'</code> | ||
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| + | See also <code>[[ReplicaSet]]</code><ref>https://kubernetes.io/docs/concepts/workloads/controllers/replicaset/</ref> concept. | ||
== Activities == | == Activities == | ||
| − | # [[Create and configure a basic Pod]]: <code>[[kubectl apply]]</code> | + | # [[CKA v1.28]]: [[Understand connectivity between Pods]] |
| − | # Create a pod network: <code>[[kubeadm]] | + | # [[CKA v1.15]]: [[Create and configure a basic Pod]]: <code>[[kubectl apply]]</code> |
| − | # [[ | + | # Create a [[pod network]]: <code>[[kubeadm init]] --pod-network-cidr=10.244.0.0/16</code> |
| − | + | # [[Mark a pod as critical]]: https://kubernetes.io/docs/tasks/administer-cluster/guaranteed-scheduling-critical-addon-pods/#marking-pod-as-critical | |
| − | + | ||
| + | == Related terms == | ||
| + | * <code>[[kind: Pod]]</code> | ||
| + | * <code>[[podAnnotations:]]</code> | ||
| + | * <code>[[podman pod stats]]</code> | ||
| + | * <code>[[kubernetes.io]]/pod/volume/utilization</code> | ||
| + | * [[List containers on a POD]] | ||
| + | * <code>[[readinessProbe]], [[livenessProbe]]</code> | ||
| + | * <code>[[kubectl exec --stdin --tty]]</code> | ||
| + | * [[Kubernetes Container Lifecycle Events]] | ||
| + | * [[Kubernetes pod affinity and anti affinity]] | ||
| + | * [[Kubernetes, env:]] | ||
| + | * [[Pod Security]]: [[Kyverno]] | ||
| + | * <code>[[SecurityContext]]</code> | ||
| + | * <code>[[Error creating: pods]]</code> | ||
| + | * [[PodReadyToStartContainers]] | ||
| + | * [[Pod updates may no change fields other than]] | ||
== See also == | == See also == | ||
| − | * | + | * {{Pods}} |
| − | * {{ | + | * {{CKAD}} |
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[[Category:Cloud computing]] | [[Category:Cloud computing]] | ||
[[Category:CKAD]] | [[Category:CKAD]] | ||
Latest revision as of 17:38, 15 October 2024
Kubernetes Pods [1][2] are the smallest deployable units that allows to deploy one or multiple containers as a single atomic unit. Pods are defined using YAML files and applied with kubectl apply command.
[edit]
kubectl applykubectl create -f mypod.yml- Get a list of pods:
kubectl get pod MY_POD_NAMEkubectl delete pod MY_POD_NAMEkubectl top pod PODNAME- Get more information about a pod:
kubectl describe pod MY_POD_NAME
- List all container by pod:
kubectl get pods -o jsonpath='{range .items[*]}{"pod: "}{.metadata.name}{"\n"}{range .spec.containers[*]}{"\tname: "}{.name}{"\n\timage: "}{.image}{"\n"}{end}'
See also ReplicaSet[3] concept.
Activities[edit]
- CKA v1.28: Understand connectivity between Pods
- CKA v1.15: Create and configure a basic Pod:
kubectl apply - Create a pod network:
kubeadm init --pod-network-cidr=10.244.0.0/16 - Mark a pod as critical: https://kubernetes.io/docs/tasks/administer-cluster/guaranteed-scheduling-critical-addon-pods/#marking-pod-as-critical
Related terms[edit]
kind: PodpodAnnotations:podman pod statskubernetes.io/pod/volume/utilization- List containers on a POD
readinessProbe, livenessProbekubectl exec --stdin --tty- Kubernetes Container Lifecycle Events
- Kubernetes pod affinity and anti affinity
- Kubernetes, env:
- Pod Security: Kyverno
SecurityContextError creating: pods- PodReadyToStartContainers
- Pod updates may no change fields other than
See also[edit]
- Pods:
kubectl apply,kubectl [ pod get | top | delete | describe pods ],InitContainers, PodInitializing, CrashLoopBackOff, ImagePullPolicy:, NodeAffinity, NodeSelector, Terminated - CKA: v1.28: API, Namespace, Pods, secrets, Services, deployments, nodes, Volumes, Ingress, CKS
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