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Recreate endpoint/service if it lost in between.
In some setups, after creation of dynamic PVs and before mounting/using these PVs in a pod, the endpoint/service got mistakenly deleted by the user/developer. By making these methods 'plugin' specific, we can call it from mounter if there are scenarios where the endpoint and service got wiped in between accidentally. Signed-off-by: Humble Chirammal hchiramm@redhat.com
This commit is contained in:
Humble Chirammal
parent
bb26376d51
commit
936c81ddfb
@ -80,6 +80,9 @@ const (
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// absGidMin <= defGidMin <= defGidMax <= absGidMax
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absoluteGidMin = 2000
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absoluteGidMax = math.MaxInt32
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heketiAnn = "heketi-dynamic-provisioner"
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glusterTypeAnn = "gluster.org/type"
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glusterDescAnn = "Gluster: Dynamically provisioned PV"
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)
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func (plugin *glusterfsPlugin) Init(host volume.VolumeHost) error {
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@ -141,12 +144,57 @@ func (plugin *glusterfsPlugin) NewMounter(spec *volume.Spec, pod *v1.Pod, _ volu
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if kubeClient == nil {
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return nil, fmt.Errorf("glusterfs: failed to get kube client to initialize mounter")
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}
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ep, err := kubeClient.Core().Endpoints(ns).Get(epName, metav1.GetOptions{})
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if err != nil {
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glog.Errorf("glusterfs: failed to get endpoints %s[%v]", epName, err)
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return nil, err
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if err != nil && errors.IsNotFound(err) {
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claim := spec.PersistentVolume.Spec.ClaimRef.Name
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checkEpName := dynamicEpSvcPrefix + claim
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if epName != checkEpName {
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return nil, fmt.Errorf("failed to get endpoint %s, error %v", epName, err)
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}
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glog.Errorf("glusterfs: failed to get endpoint %s[%v]", epName, err)
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if spec != nil && spec.PersistentVolume.Annotations["kubernetes.io/createdby"] == heketiAnn {
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class, err := volutil.GetClassForVolume(plugin.host.GetKubeClient(), spec.PersistentVolume)
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if err != nil {
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return nil, fmt.Errorf("glusterfs: failed to get storageclass, error: %v", err)
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}
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cfg, err := parseClassParameters(class.Parameters, plugin.host.GetKubeClient())
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if err != nil {
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return nil, fmt.Errorf("glusterfs: failed to parse parameters, error: %v", err)
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}
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scConfig := *cfg
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cli := gcli.NewClient(scConfig.url, scConfig.user, scConfig.secretValue)
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if cli == nil {
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return nil, fmt.Errorf("glusterfs: failed to create heketi client, error: %v", err)
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}
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volumeID := dstrings.TrimPrefix(source.Path, volPrefix)
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volInfo, err := cli.VolumeInfo(volumeID)
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if err != nil {
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return nil, fmt.Errorf("glusterfs: failed to get volume info, error: %v", err)
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}
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endpointIPs, err := getClusterNodes(cli, volInfo.Cluster)
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if err != nil {
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return nil, fmt.Errorf("glusterfs: failed to get cluster nodes, error: %v", err)
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}
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// Give an attempt to recreate endpoint/service.
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_, _, err = plugin.createEndpointService(ns, epName, endpointIPs, claim)
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if err != nil && !errors.IsAlreadyExists(err) {
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glog.Errorf("glusterfs: failed to recreate endpoint/service, error: %v", err)
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return nil, fmt.Errorf("failed to recreate endpoint/service, error: %v", err)
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}
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glog.V(3).Infof("glusterfs: endpoint/service [%v] successfully recreated ", epName)
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} else {
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return nil, err
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}
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}
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glog.V(1).Infof("glusterfs: endpoints %v", ep)
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return plugin.newMounterInternal(spec, ep, pod, plugin.host.GetMounter(), exec.New())
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}
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@ -567,6 +615,77 @@ func (p *glusterfsPlugin) getGidTable(className string, min int, max int) (*MinM
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return newGidTable, nil
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}
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//createEndpointService create an endpoint and service in provided namespace.
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func (plugin *glusterfsPlugin) createEndpointService(namespace string, epServiceName string, hostips []string, pvcname string) (endpoint *v1.Endpoints, service *v1.Service, err error) {
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addrlist := make([]v1.EndpointAddress, len(hostips))
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for i, v := range hostips {
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addrlist[i].IP = v
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}
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endpoint = &v1.Endpoints{
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ObjectMeta: metav1.ObjectMeta{
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Namespace: namespace,
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Name: epServiceName,
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Labels: map[string]string{
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"gluster.kubernetes.io/provisioned-for-pvc": pvcname,
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},
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},
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Subsets: []v1.EndpointSubset{{
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Addresses: addrlist,
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Ports: []v1.EndpointPort{{Port: 1, Protocol: "TCP"}},
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}},
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}
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kubeClient := plugin.host.GetKubeClient()
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if kubeClient == nil {
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return nil, nil, fmt.Errorf("glusterfs: failed to get kube client when creating endpoint service")
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}
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_, err = kubeClient.Core().Endpoints(namespace).Create(endpoint)
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if err != nil && errors.IsAlreadyExists(err) {
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glog.V(1).Infof("glusterfs: endpoint [%s] already exist in namespace [%s]", endpoint, namespace)
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err = nil
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}
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if err != nil {
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glog.Errorf("glusterfs: failed to create endpoint: %v", err)
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return nil, nil, fmt.Errorf("error creating endpoint: %v", err)
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}
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service = &v1.Service{
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ObjectMeta: metav1.ObjectMeta{
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Name: epServiceName,
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Namespace: namespace,
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Labels: map[string]string{
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"gluster.kubernetes.io/provisioned-for-pvc": pvcname,
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},
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},
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Spec: v1.ServiceSpec{
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Ports: []v1.ServicePort{
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{Protocol: "TCP", Port: 1}}}}
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_, err = kubeClient.Core().Services(namespace).Create(service)
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if err != nil && errors.IsAlreadyExists(err) {
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glog.V(1).Infof("glusterfs: service [%s] already exist in namespace [%s]", service, namespace)
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err = nil
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}
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if err != nil {
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glog.Errorf("glusterfs: failed to create service: %v", err)
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return nil, nil, fmt.Errorf("error creating service: %v", err)
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}
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return endpoint, service, nil
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}
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// deleteEndpointService delete the endpoint and service from the provided namespace.
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func (plugin *glusterfsPlugin) deleteEndpointService(namespace string, epServiceName string) (err error) {
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kubeClient := plugin.host.GetKubeClient()
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if kubeClient == nil {
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return fmt.Errorf("glusterfs: failed to get kube client when deleting endpoint service")
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}
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err = kubeClient.Core().Services(namespace).Delete(epServiceName, nil)
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if err != nil {
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glog.Errorf("glusterfs: error deleting service %s/%s: %v", namespace, epServiceName, err)
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return fmt.Errorf("error deleting service %s/%s: %v", namespace, epServiceName, err)
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}
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glog.V(1).Infof("glusterfs: service/endpoint %s/%s deleted successfully", namespace, epServiceName)
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return nil
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}
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func (d *glusterfsVolumeDeleter) getGid() (int, bool, error) {
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gidStr, ok := d.spec.Annotations[volumehelper.VolumeGidAnnotationKey]
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@ -640,7 +759,7 @@ func (d *glusterfsVolumeDeleter) Delete() error {
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dynamicEndpoint = pvSpec.Glusterfs.EndpointsName
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}
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glog.V(3).Infof("glusterfs: dynamic namespace and endpoint : [%v/%v]", dynamicNamespace, dynamicEndpoint)
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err = d.deleteEndpointService(dynamicNamespace, dynamicEndpoint)
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err = d.plugin.deleteEndpointService(dynamicNamespace, dynamicEndpoint)
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if err != nil {
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glog.Errorf("glusterfs: error when deleting endpoint/service :%v", err)
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} else {
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@ -685,7 +804,7 @@ func (r *glusterfsVolumeProvisioner) Provision() (*v1.PersistentVolume, error) {
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}
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glog.Errorf("glusterfs: create volume err: %v.", err)
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return nil, fmt.Errorf("glusterfs: create volume err: %v.", err)
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return nil, fmt.Errorf("glusterfs: create volume err: %v", err)
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}
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pv := new(v1.PersistentVolume)
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pv.Spec.PersistentVolumeSource.Glusterfs = glusterfs
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@ -699,9 +818,9 @@ func (r *glusterfsVolumeProvisioner) Provision() (*v1.PersistentVolume, error) {
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pv.Annotations = map[string]string{
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volumehelper.VolumeGidAnnotationKey: gidStr,
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"kubernetes.io/createdby": "heketi-dynamic-provisioner",
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"gluster.org/type": "file",
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"Description": "Gluster: Dynamically provisioned PV",
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"kubernetes.io/createdby": heketiAnn,
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glusterTypeAnn: "file",
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"Description": glusterDescAnn,
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}
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pv.Spec.Capacity = v1.ResourceList{
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@ -710,33 +829,6 @@ func (r *glusterfsVolumeProvisioner) Provision() (*v1.PersistentVolume, error) {
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return pv, nil
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}
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func (p *glusterfsVolumeProvisioner) GetClusterNodes(cli *gcli.Client, cluster string) (dynamicHostIps []string, err error) {
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clusterinfo, err := cli.ClusterInfo(cluster)
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if err != nil {
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glog.Errorf("glusterfs: failed to get cluster details: %v", err)
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return nil, fmt.Errorf("failed to get cluster details: %v", err)
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}
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// For the dynamically provisioned volume, we gather the list of node IPs
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// of the cluster on which provisioned volume belongs to, as there can be multiple
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// clusters.
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for _, node := range clusterinfo.Nodes {
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nodei, err := cli.NodeInfo(string(node))
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if err != nil {
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glog.Errorf("glusterfs: failed to get hostip: %v", err)
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return nil, fmt.Errorf("failed to get hostip: %v", err)
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}
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ipaddr := dstrings.Join(nodei.NodeAddRequest.Hostnames.Storage, "")
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dynamicHostIps = append(dynamicHostIps, ipaddr)
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}
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glog.V(3).Infof("glusterfs: hostlist :%v", dynamicHostIps)
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if len(dynamicHostIps) == 0 {
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glog.Errorf("glusterfs: no hosts found: %v", err)
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return nil, fmt.Errorf("no hosts found: %v", err)
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}
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return dynamicHostIps, nil
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}
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func (p *glusterfsVolumeProvisioner) CreateVolume(gid int) (r *v1.GlusterfsVolumeSource, size int, err error) {
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var clusterIDs []string
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capacity := p.options.PVC.Spec.Resources.Requests[v1.ResourceName(v1.ResourceStorage)]
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@ -764,7 +856,7 @@ func (p *glusterfsVolumeProvisioner) CreateVolume(gid int) (r *v1.GlusterfsVolum
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return nil, 0, fmt.Errorf("error creating volume %v", err)
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}
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glog.V(1).Infof("glusterfs: volume with size: %d and name: %s created", volume.Size, volume.Name)
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dynamicHostIps, err := p.GetClusterNodes(cli, volume.Cluster)
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dynamicHostIps, err := getClusterNodes(cli, volume.Cluster)
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if err != nil {
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glog.Errorf("glusterfs: error [%v] when getting cluster nodes for volume %s", err, volume)
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return nil, 0, fmt.Errorf("error [%v] when getting cluster nodes for volume %s", err, volume)
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@ -776,7 +868,7 @@ func (p *glusterfsVolumeProvisioner) CreateVolume(gid int) (r *v1.GlusterfsVolum
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// of volume creation.
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epServiceName := dynamicEpSvcPrefix + p.options.PVC.Name
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epNamespace := p.options.PVC.Namespace
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endpoint, service, err := p.createEndpointService(epNamespace, epServiceName, dynamicHostIps, p.options.PVC.Name)
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endpoint, service, err := p.plugin.createEndpointService(epNamespace, epServiceName, dynamicHostIps, p.options.PVC.Name)
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if err != nil {
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glog.Errorf("glusterfs: failed to create endpoint/service: %v", err)
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deleteErr := cli.VolumeDelete(volume.Id)
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@ -793,75 +885,6 @@ func (p *glusterfsVolumeProvisioner) CreateVolume(gid int) (r *v1.GlusterfsVolum
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}, sz, nil
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}
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func (p *glusterfsVolumeProvisioner) createEndpointService(namespace string, epServiceName string, hostips []string, pvcname string) (endpoint *v1.Endpoints, service *v1.Service, err error) {
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addrlist := make([]v1.EndpointAddress, len(hostips))
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for i, v := range hostips {
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addrlist[i].IP = v
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}
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endpoint = &v1.Endpoints{
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ObjectMeta: metav1.ObjectMeta{
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Namespace: namespace,
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Name: epServiceName,
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Labels: map[string]string{
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"gluster.kubernetes.io/provisioned-for-pvc": pvcname,
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},
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},
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Subsets: []v1.EndpointSubset{{
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Addresses: addrlist,
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Ports: []v1.EndpointPort{{Port: 1, Protocol: "TCP"}},
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}},
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}
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kubeClient := p.plugin.host.GetKubeClient()
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if kubeClient == nil {
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return nil, nil, fmt.Errorf("glusterfs: failed to get kube client when creating endpoint service")
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}
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_, err = kubeClient.Core().Endpoints(namespace).Create(endpoint)
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if err != nil && errors.IsAlreadyExists(err) {
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glog.V(1).Infof("glusterfs: endpoint [%s] already exist in namespace [%s]", endpoint, namespace)
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err = nil
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}
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if err != nil {
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glog.Errorf("glusterfs: failed to create endpoint: %v", err)
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return nil, nil, fmt.Errorf("error creating endpoint: %v", err)
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}
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service = &v1.Service{
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ObjectMeta: metav1.ObjectMeta{
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Name: epServiceName,
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Namespace: namespace,
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Labels: map[string]string{
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"gluster.kubernetes.io/provisioned-for-pvc": pvcname,
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},
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},
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Spec: v1.ServiceSpec{
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Ports: []v1.ServicePort{
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{Protocol: "TCP", Port: 1}}}}
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_, err = kubeClient.Core().Services(namespace).Create(service)
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if err != nil && errors.IsAlreadyExists(err) {
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glog.V(1).Infof("glusterfs: service [%s] already exist in namespace [%s]", service, namespace)
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err = nil
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}
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if err != nil {
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glog.Errorf("glusterfs: failed to create service: %v", err)
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return nil, nil, fmt.Errorf("error creating service: %v", err)
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}
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return endpoint, service, nil
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}
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func (d *glusterfsVolumeDeleter) deleteEndpointService(namespace string, epServiceName string) (err error) {
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kubeClient := d.plugin.host.GetKubeClient()
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if kubeClient == nil {
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return fmt.Errorf("glusterfs: failed to get kube client when deleting endpoint service")
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}
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err = kubeClient.Core().Services(namespace).Delete(epServiceName, nil)
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if err != nil {
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glog.Errorf("glusterfs: error deleting service %s/%s: %v", namespace, epServiceName, err)
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return fmt.Errorf("error deleting service %s/%s: %v", namespace, epServiceName, err)
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}
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glog.V(1).Infof("glusterfs: service/endpoint %s/%s deleted successfully", namespace, epServiceName)
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return nil
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}
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// parseSecret finds a given Secret instance and reads user password from it.
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func parseSecret(namespace, secretName string, kubeClient clientset.Interface) (string, error) {
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secretMap, err := volutil.GetSecretForPV(namespace, secretName, glusterfsPluginName, kubeClient)
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@ -957,7 +980,7 @@ func parseClassParameters(params map[string]string, kubeClient clientset.Interfa
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if len(parseVolumeTypeInfo) >= 2 {
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newReplicaCount, err := convertVolumeParam(parseVolumeTypeInfo[1])
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if err != nil {
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return nil, fmt.Errorf("error [%v] when parsing value %q of option '%s' for volume plugin %s.", err, parseVolumeTypeInfo[1], "volumetype", glusterfsPluginName)
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return nil, fmt.Errorf("error [%v] when parsing value %q of option '%s' for volume plugin %s", err, parseVolumeTypeInfo[1], "volumetype", glusterfsPluginName)
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}
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cfg.volumeType = gapi.VolumeDurabilityInfo{Type: gapi.DurabilityReplicate, Replicate: gapi.ReplicaDurability{Replica: newReplicaCount}}
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} else {
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@ -967,11 +990,11 @@ func parseClassParameters(params map[string]string, kubeClient clientset.Interfa
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if len(parseVolumeTypeInfo) >= 3 {
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newDisperseData, err := convertVolumeParam(parseVolumeTypeInfo[1])
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if err != nil {
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return nil, fmt.Errorf("error [%v] when parsing value %q of option '%s' for volume plugin %s.", parseVolumeTypeInfo[1], err, "volumetype", glusterfsPluginName)
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return nil, fmt.Errorf("error [%v] when parsing value %q of option '%s' for volume plugin %s", parseVolumeTypeInfo[1], err, "volumetype", glusterfsPluginName)
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}
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newDisperseRedundancy, err := convertVolumeParam(parseVolumeTypeInfo[2])
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if err != nil {
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return nil, fmt.Errorf("error [%v] when parsing value %q of option '%s' for volume plugin %s.", err, parseVolumeTypeInfo[2], "volumetype", glusterfsPluginName)
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return nil, fmt.Errorf("error [%v] when parsing value %q of option '%s' for volume plugin %s", err, parseVolumeTypeInfo[2], "volumetype", glusterfsPluginName)
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}
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cfg.volumeType = gapi.VolumeDurabilityInfo{Type: gapi.DurabilityEC, Disperse: gapi.DisperseDurability{Data: newDisperseData, Redundancy: newDisperseRedundancy}}
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} else {
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@ -1011,3 +1034,32 @@ func parseClassParameters(params map[string]string, kubeClient clientset.Interfa
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return &cfg, nil
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}
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// getClusterNodes() returns the cluster nodes of a given cluster
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func getClusterNodes(cli *gcli.Client, cluster string) (dynamicHostIps []string, err error) {
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clusterinfo, err := cli.ClusterInfo(cluster)
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if err != nil {
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glog.Errorf("glusterfs: failed to get cluster details: %v", err)
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return nil, fmt.Errorf("failed to get cluster details: %v", err)
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}
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// For the dynamically provisioned volume, we gather the list of node IPs
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// of the cluster on which provisioned volume belongs to, as there can be multiple
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// clusters.
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for _, node := range clusterinfo.Nodes {
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nodei, err := cli.NodeInfo(string(node))
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if err != nil {
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glog.Errorf("glusterfs: failed to get hostip: %v", err)
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return nil, fmt.Errorf("failed to get hostip: %v", err)
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}
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ipaddr := dstrings.Join(nodei.NodeAddRequest.Hostnames.Storage, "")
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dynamicHostIps = append(dynamicHostIps, ipaddr)
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}
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glog.V(3).Infof("glusterfs: hostlist :%v", dynamicHostIps)
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if len(dynamicHostIps) == 0 {
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glog.Errorf("glusterfs: no hosts found: %v", err)
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return nil, fmt.Errorf("no hosts found: %v", err)
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}
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return dynamicHostIps, nil
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}
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