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https://github.com/k3s-io/kubernetes.git
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two new pv e2e tests
This commit is contained in:
Jeff Vance
parent
072798b253
commit
7f7b2ad32f
@ -47,15 +47,14 @@ func nfsServerPodCleanup(c *client.Client, config VolumeTestConfig) {
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}
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}
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// Delete the PV. Fail test if delete fails.
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// Delete the PV. Fail test if delete fails. If success the returned PV should
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// be nil, which prevents the AfterEach from attempting to delete it.
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func deletePersistentVolume(c *client.Client, pv *api.PersistentVolume) (*api.PersistentVolume, error) {
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if pv == nil {
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return nil, fmt.Errorf("PV to be deleted is nil")
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}
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By("Deleting PersistentVolume")
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framework.Logf("Deleting PersistentVolume %v", pv.Name)
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err := c.PersistentVolumes().Delete(pv.Name)
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if err != nil {
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@ -72,12 +71,14 @@ func deletePersistentVolume(c *client.Client, pv *api.PersistentVolume) (*api.Pe
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return nil, nil // success
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}
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// Delete the PVC and wait for the PV to become Available again.
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// Validate that the PV has recycled (assumption here about reclaimPolicy).
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// Delete the PVC and wait for the PV to become Available again. Validate that
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// the PV has recycled (assumption here about reclaimPolicy). Return the pv and
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// pvc to reflect that these resources have been retrieved again (Get). If the
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// delete is successful the returned pvc should be nil and the pv non-nil.
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// Note: the pv and pvc are returned back to the It() caller so that the
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// AfterEach func can delete these objects if they are not nil.
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func deletePVCandValidatePV(c *client.Client, ns string, pvc *api.PersistentVolumeClaim, pv *api.PersistentVolume) (*api.PersistentVolume, *api.PersistentVolumeClaim, error) {
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By("Deleting PersistentVolumeClaim to trigger PV Recycling")
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framework.Logf("Deleting PersistentVolumeClaim %v to trigger PV Recycling", pvc.Name)
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err := c.PersistentVolumeClaims(ns).Delete(pvc.Name)
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if err != nil {
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@ -135,53 +136,83 @@ func createPVC(c *client.Client, ns string, pvc *api.PersistentVolumeClaim) (*ap
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return pvc, nil
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}
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// Create a PV and PVC based on the passed in nfs-server ip and namespace.
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// There are 4 combinations, 3 of which are supported here:
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// 1) prebind and create pvc first
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// 2) no prebind and create pvc first
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// 3) no prebind and create pv first
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// The case of prebinding and creating the pv first is not possible due to using a
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// *generated* name in the pvc, and thus not knowing the claim's name until after
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// it has been created.
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// **Note: this function complements makePersistentVolume() and fills in the remaining
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// name field in the pv's ClaimRef.
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func createPVandPVC(c *client.Client, serverIP, ns string, pvFirst, preBind bool) (*api.PersistentVolume, *api.PersistentVolumeClaim, error) {
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// Create a PVC followed by the PV based on the passed in nfs-server ip and
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// namespace. If the "preBind" bool is true then pre-bind the PV to the PVC
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// via the PV's ClaimRef. Return the pv and pvc to reflect the created objects.
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// Note: the pv and pvc are returned back to the It() caller so that the
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// AfterEach func can delete these objects if they are not nil.
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// Note: in the pre-bind case the real PVC name, which is generated, is not
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// known until after the PVC is instantiated. This is why the pvc is created
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// before the pv.
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func createPVCPV(c *client.Client, serverIP, ns string, preBind bool) (*api.PersistentVolume, *api.PersistentVolumeClaim, error) {
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var bindTo *api.PersistentVolumeClaim
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var err error
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var preBindMsg string
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pvc := makePersistentVolumeClaim(ns) // pvc.Name not known yet
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bindTo = nil
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if preBind { // implies pvc *must* be created before the pv
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pvFirst = false
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// make the pvc definition first
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pvc := makePersistentVolumeClaim(ns)
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if preBind {
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preBindMsg = " pre-bound"
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bindTo = pvc
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}
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// make the pv spec
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pv := makePersistentVolume(serverIP, bindTo)
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if pvFirst {
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By("Creating the PV followed by the PVC")
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pv, err = createPV(c, pv)
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} else {
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By("Creating the PVC followed by the PV")
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pvc, err = createPVC(c, ns, pvc)
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}
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By(fmt.Sprintf("Creating a PVC followed by a%s PV", preBindMsg))
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// instantiate the pvc
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pvc, err := createPVC(c, ns, pvc)
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if err != nil {
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return nil, nil, err
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}
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if pvFirst {
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pvc, err = createPVC(c, ns, pvc)
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if err != nil {
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return pv, nil, err
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}
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} else {
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// need to fill-in claimRef with pvc.Name
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// instantiate the pvc, handle pre-binding by ClaimRef if needed
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if preBind {
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pv.Spec.ClaimRef.Name = pvc.Name
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pv, err = createPV(c, pv)
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if err != nil {
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return nil, pvc, err
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}
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}
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pv, err = createPV(c, pv)
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if err != nil {
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return nil, pvc, err
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}
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return pv, pvc, nil
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}
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// Create a PV followed by the PVC based on the passed in nfs-server ip and
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// namespace. If the "preBind" bool is true then pre-bind the PVC to the PV
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// via the PVC's VolumeName. Return the pv and pvc to reflect the created
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// objects.
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// Note: the pv and pvc are returned back to the It() caller so that the
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// AfterEach func can delete these objects if they are not nil.
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// Note: in the pre-bind case the real PV name, which is generated, is not
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// known until after the PV is instantiated. This is why the pv is created
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// before the pvc.
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func createPVPVC(c *client.Client, serverIP, ns string, preBind bool) (*api.PersistentVolume, *api.PersistentVolumeClaim, error) {
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preBindMsg := ""
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if preBind {
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preBindMsg = " pre-bound"
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}
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By(fmt.Sprintf("Creating a PV followed by a%s PVC", preBindMsg))
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// make the pv and pvc definitions
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pv := makePersistentVolume(serverIP, nil)
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pvc := makePersistentVolumeClaim(ns)
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// instantiate the pv
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pv, err := createPV(c, pv)
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if err != nil {
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return nil, nil, err
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}
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// instantiate the pvc, handle pre-binding by VolumeName if needed
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if preBind {
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pvc.Spec.VolumeName = pv.Name
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}
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pvc, err = createPVC(c, ns, pvc)
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if err != nil {
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return pv, nil, err
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}
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return pv, pvc, nil
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@ -208,7 +239,10 @@ func waitOnPVandPVC(c *client.Client, ns string, pv *api.PersistentVolume, pvc *
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}
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// Waits for the pv and pvc to be bound to each other, then checks that the pv's
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// claimRef matches the pvc. Fails test on errors.
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// claimRef matches the pvc. Fails test on errors. Return the pv and pvc to
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// reflect that these resources have been retrieved again (Get).
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// Note: the pv and pvc are returned back to the It() caller so that the
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// AfterEach func can delete these objects if they are not nil.
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func waitAndValidatePVandPVC(c *client.Client, ns string, pv *api.PersistentVolume, pvc *api.PersistentVolumeClaim) (*api.PersistentVolume, *api.PersistentVolumeClaim, error) {
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var err error
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@ -327,6 +361,43 @@ func createWaitAndDeletePod(f *framework.Framework, c *client.Client, ns string,
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return nil
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}
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// validate PV/PVC, create and verify writer pod, delete PVC and PV. Ensure
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// all of these steps were successful. Return the pv and pvc to reflect that
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// these resources have been retrieved again (Get).
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// Note: the pv and pvc are returned back to the It() caller so that the
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// AfterEach func can delete these objects if they are not nil.
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func completeTest(f *framework.Framework, c *client.Client, ns string, pv *api.PersistentVolume, pvc *api.PersistentVolumeClaim) (*api.PersistentVolume, *api.PersistentVolumeClaim, error) {
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// 1. verify that the PV and PVC have binded correctly
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By("Validating the PV-PVC binding")
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pv, pvc, err := waitAndValidatePVandPVC(c, ns, pv, pvc)
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if err != nil {
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return pv, pvc, err
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}
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// 2. create the nfs writer pod, test if the write was successful,
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// then delete the pod and verify that it was deleted
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By("Checking pod has write access to PersistentVolume")
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if err = createWaitAndDeletePod(f, c, ns, pvc.Name); err != nil {
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return pv, pvc, err
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}
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// 3. delete the PVC before deleting PV, wait for PV to be "Available"
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By("Deleting the PVC to invoke the recycler")
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pv, pvc, err = deletePVCandValidatePV(c, ns, pvc, pv)
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if err != nil {
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return pv, pvc, err
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}
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// 4. cleanup by deleting the pv
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By("Deleting the PV")
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if pv, err = deletePersistentVolume(c, pv); err != nil {
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return pv, pvc, err
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}
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return pv, pvc, nil
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}
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var _ = framework.KubeDescribe("PersistentVolumes", func() {
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// global vars for the It() tests below
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@ -344,7 +415,7 @@ var _ = framework.KubeDescribe("PersistentVolumes", func() {
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NFSconfig = VolumeTestConfig{
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namespace: api.NamespaceDefault,
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prefix: "nfs",
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serverImage: "gcr.io/google_containers/volume-nfs:0.7",
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serverImage: "gcr.io/google_containers/volume-nfs:0.6",
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serverPorts: []int{2049},
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serverArgs: []string{"-G", "777", "/exports"},
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}
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@ -396,88 +467,91 @@ var _ = framework.KubeDescribe("PersistentVolumes", func() {
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// Individual tests follow:
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//
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// Create an nfs PV, a claim that matches the PV, a pod that contains the
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// claim. Verify that the PV and PVC bind correctly and that the pod can
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// write to the nfs volume.
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It("should create a PersistentVolume, Claim, and Pod that will test write access of the volume [Flaky]", func() {
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// Create an nfs PV, then a claim that matches the PV, and a pod that
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// contains the claim. Verify that the PV and PVC bind correctly, and
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// that the pod can write to the nfs volume.
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It("should create a non-pre-bound PV and PVC: test write access [Flaky]", func() {
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pv, pvc, err = createPVandPVC(c, serverIP, ns, true /*pv first*/, false)
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pv, pvc, err = createPVPVC(c, serverIP, ns, false)
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if err != nil {
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framework.Failf("%v", err)
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}
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pv, pvc, err = waitAndValidatePVandPVC(c, ns, pv, pvc)
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if err != nil {
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framework.Failf("%v", err)
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}
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By("Checking pod has write access to PersistentVolume")
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if err = createWaitAndDeletePod(f, c, ns, pvc.Name); err != nil {
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framework.Failf("%v", err)
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}
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// Delete the PVC before deleting PV, wait for PV to be Available
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pv, pvc, err = deletePVCandValidatePV(c, ns, pvc, pv)
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if err != nil {
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framework.Failf("%v", err)
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}
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// Last cleanup step is to delete the pv
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pv, err = deletePersistentVolume(c, pv)
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// validate PV-PVC, create and verify writer pod, delete PVC
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// and PV
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pv, pvc, err = completeTest(f, c, ns, pv, pvc)
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if err != nil {
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framework.Failf("%v", err)
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}
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})
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// Create an nfs PV that is *pre-bound* to a claim. Create a pod that
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// contains the claim. Verify that the PV and PVC bind correctly and that
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// the pod can write to the nfs volume.
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It("should create a pre-bound PersistentVolume, Claim, and Pod that will test write access of the volume [Flaky]", func() {
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// Create a claim first, then a nfs PV that matches the claim, and a
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// pod that contains the claim. Verify that the PV and PVC bind
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// correctly, and that the pod can write to the nfs volume.
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It("create a PVC and non-pre-bound PV: test write access [Flaky]", func() {
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pv, pvc, err = createPVandPVC(c, serverIP, ns, false /*pvc first*/, true /*prebind*/)
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pv, pvc, err = createPVCPV(c, serverIP, ns, false)
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if err != nil {
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framework.Failf("%v", err)
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}
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pv, pvc, err = waitAndValidatePVandPVC(c, ns, pv, pvc)
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// validate PV-PVC, create and verify writer pod, delete PVC
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// and PV
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pv, pvc, err = completeTest(f, c, ns, pv, pvc)
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if err != nil {
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framework.Failf("%v", err)
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}
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})
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// Create a claim first, then a pre-bound nfs PV that matches the claim,
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// and a pod that contains the claim. Verify that the PV and PVC bind
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// correctly, and that the pod can write to the nfs volume.
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It("create a PVC and a pre-bound PV: test write access [Flaky]", func() {
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pv, pvc, err = createPVCPV(c, serverIP, ns, true)
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if err != nil {
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framework.Failf("%v", err)
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}
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// checkPod writes to the nfs volume
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By("Checking pod has write access to pre-bound PersistentVolume")
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// Instantiate pod, wait for it to exit, then delete it
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if err = createWaitAndDeletePod(f, c, ns, pvc.Name); err != nil {
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// validate PV-PVC, create and verify writer pod, delete PVC
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// and PV
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pv, pvc, err = completeTest(f, c, ns, pv, pvc)
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if err != nil {
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framework.Failf("%v", err)
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}
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})
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// Delete the PVC before deleting PV, wait for PV to be Available
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pv, pvc, err = deletePVCandValidatePV(c, ns, pvc, pv)
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// Create a nfs PV first, then a pre-bound PVC that matches the PV,
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// and a pod that contains the claim. Verify that the PV and PVC bind
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// correctly, and that the pod can write to the nfs volume.
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It("create a PV and a pre-bound PVC: test write access [Flaky]", func() {
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pv, pvc, err = createPVPVC(c, serverIP, ns, true)
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if err != nil {
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framework.Failf("%v", err)
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}
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// Last cleanup step is to delete the pv
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pv, err = deletePersistentVolume(c, pv)
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// validate PV-PVC, create and verify writer pod, delete PVC
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// and PV
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pv, pvc, err = completeTest(f, c, ns, pv, pvc)
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if err != nil {
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framework.Failf("%v", err)
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}
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})
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})
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// Returns a PV definition based on the nfs server IP. If the PVC is not nil then the
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// PV is defined with a ClaimRef which includes the PVC's namespace. If the PVC is
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// nil then the PV is not defined with a ClaimRef.
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// **Note: the passed-in claim does not have a name until it is created (instantiated)
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// and thus the PV's ClaimRef cannot be completely filled-in in this func. Therefore,
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// the ClaimRef's name is added later in createPVandPVC().
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// Returns a PV definition based on the nfs server IP. If the PVC is not nil
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// then the PV is defined with a ClaimRef which includes the PVC's namespace.
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// If the PVC is nil then the PV is not defined with a ClaimRef.
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// Note: the passed-in claim does not have a name until it is created
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// (instantiated) and thus the PV's ClaimRef cannot be completely filled-in in
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// this func. Therefore, the ClaimRef's name is added later in
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// createPVCPV.
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func makePersistentVolume(serverIP string, pvc *api.PersistentVolumeClaim) *api.PersistentVolume {
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// Specs are expected to match this test's PersistentVolumeClaim
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var claimRef *api.ObjectReference
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claimRef = nil
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if pvc != nil {
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claimRef = &api.ObjectReference{
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Name: pvc.Name,
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@ -515,6 +589,9 @@ func makePersistentVolume(serverIP string, pvc *api.PersistentVolumeClaim) *api.
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}
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// Returns a PVC definition based on the namespace.
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// Note: if this PVC is intended to be pre-bound to a PV, whose name is not
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// known until the PV is instantiated, then the func createPVPVC will add
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// pvc.Spec.VolumeName to this claim.
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func makePersistentVolumeClaim(ns string) *api.PersistentVolumeClaim {
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// Specs are expected to match this test's PersistentVolume
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