Golang Client.Storage方法代碼示例

	// filled in BeforeEach
	var c *client.Client
	var ns string

	BeforeEach(func() {
		c = f.Client
		ns = f.Namespace.Name
	})

	framework.KubeDescribe("DynamicProvisioner", func() {
		It("should create and delete persistent volumes [Slow]", func() {
			framework.SkipUnlessProviderIs("openstack", "gce", "aws", "gke")

			By("creating a StorageClass")
			class := newStorageClass()
			_, err := c.Storage().StorageClasses().Create(class)
			defer c.Storage().StorageClasses().Delete(class.Name)
			Expect(err).NotTo(HaveOccurred())

			By("creating a claim with a dynamic provisioning annotation")
			claim := newClaim(ns, false)
			defer func() {
				c.PersistentVolumeClaims(ns).Delete(claim.Name)
			}()
			claim, err = c.PersistentVolumeClaims(ns).Create(claim)
			Expect(err).NotTo(HaveOccurred())

			testDynamicProvisioning(c, claim)
		})
	})

func testDynamicProvisioning(t storageClassTest, client *client.Client, claim *api.PersistentVolumeClaim, class *storage.StorageClass) {
	if class != nil {
		By("creating a StorageClass " + class.Name)
		class, err := client.Storage().StorageClasses().Create(class)
		defer func() {
			framework.Logf("deleting storage class %s", class.Name)
			client.Storage().StorageClasses().Delete(class.Name)
		}()
		Expect(err).NotTo(HaveOccurred())
	}

	By("creating a claim")
	claim, err := client.PersistentVolumeClaims(claim.Namespace).Create(claim)
	defer func() {
		framework.Logf("deleting claim %s/%s", claim.Namespace, claim.Name)
		client.PersistentVolumeClaims(claim.Namespace).Delete(claim.Name)
	}()
	Expect(err).NotTo(HaveOccurred())
	err = framework.WaitForPersistentVolumeClaimPhase(api.ClaimBound, client, claim.Namespace, claim.Name, framework.Poll, framework.ClaimProvisionTimeout)
	Expect(err).NotTo(HaveOccurred())

	By("checking the claim")
	// Get new copy of the claim
	claim, err = client.PersistentVolumeClaims(claim.Namespace).Get(claim.Name)
	Expect(err).NotTo(HaveOccurred())

	// Get the bound PV
	pv, err := client.PersistentVolumes().Get(claim.Spec.VolumeName)
	Expect(err).NotTo(HaveOccurred())

	// Check sizes
	expectedCapacity := resource.MustParse(t.expectedSize)
	pvCapacity := pv.Spec.Capacity[api.ResourceName(api.ResourceStorage)]
	Expect(pvCapacity.Value()).To(Equal(expectedCapacity.Value()))

	requestedCapacity := resource.MustParse(t.claimSize)
	claimCapacity := claim.Spec.Resources.Requests[api.ResourceName(api.ResourceStorage)]
	Expect(claimCapacity.Value()).To(Equal(requestedCapacity.Value()))

	// Check PV properties
	By("checking the PV")
	Expect(pv.Spec.PersistentVolumeReclaimPolicy).To(Equal(api.PersistentVolumeReclaimDelete))
	expectedAccessModes := []api.PersistentVolumeAccessMode{api.ReadWriteOnce}
	Expect(pv.Spec.AccessModes).To(Equal(expectedAccessModes))
	Expect(pv.Spec.ClaimRef.Name).To(Equal(claim.ObjectMeta.Name))
	Expect(pv.Spec.ClaimRef.Namespace).To(Equal(claim.ObjectMeta.Namespace))

	// Run the checker
	if t.pvCheck != nil {
		err = t.pvCheck(pv)
		Expect(err).NotTo(HaveOccurred())
	}

	// We start two pods:
	// - The first writes 'hello word' to the /mnt/test (= the volume).
	// - The second one runs grep 'hello world' on /mnt/test.
	// If both succeed, Kubernetes actually allocated something that is
	// persistent across pods.
	By("checking the created volume is writable")
	runInPodWithVolume(client, claim.Namespace, claim.Name, "echo 'hello world' > /mnt/test/data")

	By("checking the created volume is readable and retains data")
	runInPodWithVolume(client, claim.Namespace, claim.Name, "grep 'hello world' /mnt/test/data")

	// Ugly hack: if we delete the AWS/GCE/OpenStack volume here, it will
	// probably collide with destruction of the pods above - the pods
	// still have the volume attached (kubelet is slow...) and deletion
	// of attached volume is not allowed by AWS/GCE/OpenStack.
	// Kubernetes *will* retry deletion several times in
	// pvclaimbinder-sync-period.
	// So, technically, this sleep is not needed. On the other hand,
	// the sync perion is 10 minutes and we really don't want to wait
	// 10 minutes here. There is no way how to see if kubelet is
	// finished with cleaning volumes. A small sleep here actually
	// speeds up the test!
	// Three minutes should be enough to clean up the pods properly.
	// We've seen GCE PD detach to take more than 1 minute.
	By("Sleeping to let kubelet destroy all pods")
	time.Sleep(3 * time.Minute)

	By("deleting the claim")
	framework.ExpectNoError(client.PersistentVolumeClaims(claim.Namespace).Delete(claim.Name))

	// Wait for the PV to get deleted too.
	framework.ExpectNoError(framework.WaitForPersistentVolumeDeleted(client, pv.Name, 5*time.Second, 20*time.Minute))
}