Difference between revisions of "Kubernetes Persistent Volumes (PV)"

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Persistent Volumes subsystem provides an API for users and administrators that abstracts details of how storage is provided from how it is consumed
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TOMERGE: [[Kubernetes Persistent volumes]]
  
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Kubernetes Persistent Volumes subsystem provides an API for users and administrators that abstracts details of how storage is provided from how it is consumed
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* https://kubernetes.io/docs/concepts/storage/persistent-volumes/
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* https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.29/#persistentvolume-v1-core
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__NOTOC__
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* <code>[[kubectl get pvc]]</code>
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* <code>[[kubectl describe pvc mysql-pv-claim]]</code>
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 +
Volumes:
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[[VolumeMounts:]]
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[[ExtraVolumes]]
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== Examples ==
 +
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{{k8s volumes examples}}
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 +
* Claims: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#claims-as-volumes
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<pre>
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apiVersion: v1
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kind: Pod
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metadata:
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  name: mypod
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spec:
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  containers:
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    - name: myfrontend
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      image: nginx
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      volumeMounts:
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      - mountPath: "/var/www/html"
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        name: mypd
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  volumes:
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    - name: mypd
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      persistentVolumeClaim:
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        claimName: myclaim
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</pre>
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 +
 +
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spec:
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  volumes:
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    - name: elasticsearch-master
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      [[persistentVolumeClaim:]]
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        [[claimName:]] elasticsearch-master-elasticsearch-master-0
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    - name: mynewvolumen
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      emptyDir: {}
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== [[Kubernetes Persistent Volumes (PV) providers|Providers]] ==
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 +
== Error ==
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error: error validating "yourpv": error validating data:
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ValidationError(PersistentVolume.spec.csi): missing required field "volumeHandle" in
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io.k8s.api.core.v1.CSIPersistentVolumeSource; if you choose to ignore these errors, turn
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validation off with --validate=false
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== Metrics ==
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kubelet_volume_stats_available_bytes
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kubelet_volume_stats_capacity_bytes
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kubelet_volume_stats_inodes
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kubelet_volume_stats_inodes_free
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kubelet_volume_stats_inodes_used
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kubelet_volume_stats_used_bytes
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Ref: https://stackoverflow.com/questions/44718268/how-to-monitor-disk-usage-of-kubernetes-persistent-volumes
 +
 +
== News ==
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* Aug 2024 Persistent Volume last phase transition time <ref>https://kubernetes.io/blog/2024/08/13/kubernetes-v1-31-release/#persistent-volume-last-phase-transition-time</ref>
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* Jun 2018 [[v1.11]] [[Resizing]] Persistent Volumes using Kubernetes in alpha
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 +
== CKA ==
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* [[CKA v1.23]]: [[Understand storage classes, persistent volumes]]
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* [[CKA v1.18]]: Understand [[persistent volumes]] and know how to create them
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* [[CKA v1.15]]: [[Understand PersistentVolumeClaims for storage]]
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 +
== Activities ==
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* [[Kubernetes: Rename PVs]]
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* [[Access a volume with a temporary pod]]
  
 
== Related terms ==
 
== Related terms ==
 
* [[Persistent Volume Claim (PVC)]]
 
* [[Persistent Volume Claim (PVC)]]
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* [[Volumes (Kubernetes)]]
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* <code>[[kubectl apply]]</code>
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* [[Container Storage Interface (CSI)]]
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* <code>[[defaultMode:]]</code>
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* <code>[[values.yml]]</code>
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* <code>[[kubernetes_persistent_volume]]</code>
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* <code>[[kind: ConfigMap]]</code>
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* <code>[[kind: PersistentVolume]]</code>
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* [[Terraform kubernetes resource: kubernetes persistent volume v1]]
  
 
== See also ==
 
== See also ==
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* {{K8s}}
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* {{K8s volumes}}
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* {{Kubernetes storage}}
 +
 
 +
[[Category:K8s]]

Latest revision as of 14:47, 12 September 2024

TOMERGE: Kubernetes Persistent volumes

Kubernetes Persistent Volumes subsystem provides an API for users and administrators that abstracts details of how storage is provided from how it is consumed 

Volumes:
VolumeMounts:
ExtraVolumes

Examples[edit]

 volumes:
 your-vol-1:
   Type:      ConfigMap (a volume populated by a ConfigMap)
   Name:      prod-admin-config
   Optional:  false

 your-vol-2:
   Type:        Secret (a volume populated by a Secret)
   SecretName:  your-secret-name
   Optional:    false

 your-vol-3:
   Type:                    Projected (a volume that contains injected data from multiple sources)
   TokenExpirationSeconds:  3607
   ConfigMapName:          your-kube-root-ca.crt
   ConfigMapOptional:       <nil>
   DownwardAPI:             true

apiVersion: v1
kind: Pod
metadata:
  name: mypod
spec:
  containers:
    - name: myfrontend
      image: nginx
      volumeMounts:
      - mountPath: "/var/www/html"
        name: mypd
  volumes:
    - name: mypd
      persistentVolumeClaim:
        claimName: myclaim




spec:
  volumes:
    - name: elasticsearch-master
      persistentVolumeClaim:
        claimName: elasticsearch-master-elasticsearch-master-0
    - name: mynewvolumen
      emptyDir: {}

Providers[edit]

Error[edit]

error: error validating "yourpv": error validating data: 
ValidationError(PersistentVolume.spec.csi): missing required field "volumeHandle" in 
io.k8s.api.core.v1.CSIPersistentVolumeSource; if you choose to ignore these errors, turn 
validation off with --validate=false

Metrics[edit]

kubelet_volume_stats_available_bytes
kubelet_volume_stats_capacity_bytes
kubelet_volume_stats_inodes
kubelet_volume_stats_inodes_free
kubelet_volume_stats_inodes_used
kubelet_volume_stats_used_bytes

Ref: https://stackoverflow.com/questions/44718268/how-to-monitor-disk-usage-of-kubernetes-persistent-volumes

News[edit]

  • Aug 2024 Persistent Volume last phase transition time [1]
  • Jun 2018 v1.11 Resizing Persistent Volumes using Kubernetes in alpha

CKA[edit]

Activities[edit]

Related terms[edit]

See also[edit]

  • ↑ https://kubernetes.io/blog/2024/08/13/kubernetes-v1-31-release/#persistent-volume-last-phase-transition-time
    • Retrieved from "https://www.wikieduonline.com/index.php?title=Kubernetes_Persistent_Volumes_(PV)&oldid=343909"

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