Red Hat Summit Red Hat SummitSupportConsoleDéveloppeursCommencer un essaiContact

Ce contenu n'est pas disponible dans la langue sélectionnée.

Chapter 16. Using Persistent Volumes

16.1. Overview
Copier lien

A PersistentVolume object is a storage resource in an OpenShift cluster. Storage is provisioned by an administrator by creating PersistentVolume objects from sources such as GCE Persistent Disks, AWS Elastic Block Stores (EBS), and NFS mounts.

Note

Persistent volume plug-ins other than the supported NFS plug-in, such as AWS Elastic Block Stores (EBS), GCE Persistent Disks, GlusterFS, iSCSI, and RADOS (Ceph), are currently in Technology Preview. The Administrator Guide provides instructions on provisioning an OpenShift cluster with persistent storage using NFS.

Storage can be made available to you by laying claims to the resource. You can make a request for storage resources using a PersistentVolumeClaim object; the claim is paired with a volume that generally matches your request.

16.2. Requesting Storage
Copier lien

You can request storage by creating PersistentVolumeClaim objects in your projects:

Example 16.1. Persistent Volume Claim Object Definition

{
    "apiVersion": "v1",
    "kind": "PersistentVolumeClaim",
    "metadata": {
        "name": "claim1"
    },
    "spec": {
        "accessModes": [ "ReadWriteOnce" ],
        "resources": {
            "requests": {
                "storage": "5Gi"
            },
            "volumeName": "pv0001"
        }
    }
}
Copy to Clipboard Toggle word wrap

16.3. Volume and Claim Binding
Copier lien

A PersistentVolume is a specific resource. A PersistentVolumeClaim is a request for a resource with specific attributes, such as storage size. In between the two is a process that matches a claim to an available volume and binds them together. This allows the claim to be used as a volume in a pod. OpenShift finds the volume backing the claim and mounts it into the pod.

You can tell whether a claim or volume is bound by querying using the CLI: 

$ oc get pvc
NAME        LABELS    STATUS    VOLUME
claim1      map[]     Bound     pv0001

$ oc get pv
NAME                LABELS              CAPACITY            ACCESSMODES         STATUS    CLAIM
pv0001              map[]               5368709120          RWO                 Bound     yournamespace / claim1
Copy to Clipboard Toggle word wrap

16.4. Claims as Volumes in Pods
Copier lien

A PersistentVolumeClaim is used by a pod as a volume. OpenShift finds the claim with the given name in the same namespace as the pod, then uses the claim to find the corresponding volume to mount.

Example 16.2. Pod Definition with a Claim

{
    "apiVersion": "v1",
    "kind": "Pod",
    "metadata": {
        "name": "mypod",
        "labels": {
            "name": "frontendhttp"
        }
    },
    "spec": {
        "containers": [{
            "name": "myfrontend",
            "image": "nginx",
            "ports": [{
                "containerPort": 80,
                "name": "http-server"
            }],
            "volumeMounts": [{
                "mountPath": "/var/www/html",
                "name": "pvol"
            }]
        }],
        "volumes": [{
            "name": "pvol",
            "persistentVolumeClaim": {
                "claimName": "claim1"
            }
        }]
    }
}
Copy to Clipboard Toggle word wrap

See Kubernetes Persistent Volumes for more information.

Retour au début
Red Hat logoGithubredditYoutubeTwitter

Apprendre

Essayez, achetez et vendez

Communautés

À propos de la documentation Red Hat

Nous aidons les utilisateurs de Red Hat à innover et à atteindre leurs objectifs grâce à nos produits et services avec un contenu auquel ils peuvent faire confiance. Découvrez nos récentes mises à jour.

Rendre l’open source plus inclusif

Red Hat s'engage à remplacer le langage problématique dans notre code, notre documentation et nos propriétés Web. Pour plus de détails, consultez le Blog Red Hat.

À propos de Red Hat

Nous proposons des solutions renforcées qui facilitent le travail des entreprises sur plusieurs plates-formes et environnements, du centre de données central à la périphérie du réseau.

Theme

© 2025 Red Hat