Change:
<ins> // +build !providerless /* Copyright 2021 The Kubernetes Authors. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package vsphere import ( "context" "fmt" "github.com/vmware/govmomi/property" "github.com/vmware/govmomi/vim25/mo" "github.com/vmware/govmomi/vim25/types" "k8s.io/klog/v2" "k8s.io/legacy-cloud-providers/vsphere/vclib" ) type sharedDatastore struct { nodeManager         *NodeManager candidateDatastores []*vclib.DatastoreInfo } type hostInfo struct { hostUUID   string hostMOID   string datacenter string } const ( summary       = "summary" runtimeHost   = "summary.runtime.host" hostsProperty = "host" nameProperty  = "name" ) func (shared *sharedDatastore) getSharedDatastore(ctcx context.Context) (*vclib.DatastoreInfo, error) { nodes := shared.nodeManager.getNodes() // Segregate nodes according to VC-DC dcNodes := make(map[string][]NodeInfo) nodeHosts := make(map[string]hostInfo) for nodeName, node := range nodes { nodeInfo, err := shared.nodeManager.GetNodeInfoWithNodeObject(node) if err != nil { return nil, fmt.Errorf("unable to find node %s: %v", nodeName, err) } vcDC := nodeInfo.vcServer + nodeInfo.dataCenter.String() dcNodes[vcDC] = append(dcNodes[vcDC], nodeInfo) } for vcDC, nodes := range dcNodes { var hostInfos []hostInfo var err error hostInfos, err = shared.getNodeHosts(ctcx, nodes, vcDC) if err != nil { if vclib.IsManagedObjectNotFoundError(err) { klog.Warningf("SharedHost.getSharedDatastore: batch fetching of hosts failed - switching to fetching them individually.") hostInfos, err = shared.getEachNodeHost(ctcx, nodes, vcDC) if err != nil { klog.Errorf("SharedHost.getSharedDatastore: error fetching node hosts individually: %v", err) return nil, err } } else { return nil, err } } for _, host := range hostInfos { hostDCName := fmt.Sprintf("%s/%s", host.datacenter, host.hostMOID) nodeHosts[hostDCName] = host } } if len(nodeHosts) < 1 { msg := fmt.Sprintf("SharedHost.getSharedDatastore unable to find hosts associated with nodes") klog.Error(msg) return nil, fmt.Errorf("") } for _, datastoreInfo := range shared.candidateDatastores { dataStoreHosts, err := shared.getAttachedHosts(ctcx, datastoreInfo.Datastore) if err != nil { msg := fmt.Sprintf("error finding attached hosts to datastore %s: %v", datastoreInfo.Name(), err) klog.Error(msg) return nil, fmt.Errorf(msg) } if shared.isIncluded(dataStoreHosts, nodeHosts) { return datastoreInfo, nil } } return nil, fmt.Errorf("SharedHost.getSharedDatastore: unable to find any shared datastores") } // check if all of the nodeHosts are included in the dataStoreHosts func (shared *sharedDatastore) isIncluded(dataStoreHosts []hostInfo, nodeHosts map[string]hostInfo) bool { result := true for _, host := range nodeHosts { hostFound := false for _, targetHost := range dataStoreHosts { if host.hostUUID == targetHost.hostUUID && host.hostMOID == targetHost.hostMOID { hostFound = true } } if !hostFound { result = false } } return result } func (shared *sharedDatastore) getEachNodeHost(ctx context.Context, nodes []NodeInfo, dcVC string) ([]hostInfo, error) { var hosts []hostInfo for _, node := range nodes { host, err := node.vm.GetHost(ctx) if err != nil { klog.Errorf("SharedHost.getEachNodeHost: unable to find host for vm %s: %v", node.vm.InventoryPath, err) return nil, err } hosts = append(hosts, hostInfo{ hostUUID:   host.Summary.Hardware.Uuid, hostMOID:   host.Summary.Host.String(), datacenter: node.dataCenter.String(), }) } return hosts, nil } func (shared *sharedDatastore) getNodeHosts(ctx context.Context, nodes []NodeInfo, dcVC string) ([]hostInfo, error) { var vmRefs []types.ManagedObjectReference if len(nodes) < 1 { return nil, fmt.Errorf("no nodes found for dc-vc: %s", dcVC) } var nodeInfo NodeInfo for _, n := range nodes { nodeInfo = n vmRefs = append(vmRefs, n.vm.Reference()) } pc := property.DefaultCollector(nodeInfo.dataCenter.Client()) var vmoList []mo.VirtualMachine err := pc.Retrieve(ctx, vmRefs, []string{nameProperty, runtimeHost}, &vmoList) if err != nil { klog.Errorf("SharedHost.getNodeHosts: unable to fetch vms from datacenter %s: %w", nodeInfo.dataCenter.String(), err) return nil, err } var hostMoList []mo.HostSystem var hostRefs []types.ManagedObjectReference for _, vmo := range vmoList { if vmo.Summary.Runtime.Host == nil { msg := fmt.Sprintf("SharedHost.getNodeHosts: no host associated with vm %s", vmo.Name) klog.Error(msg) return nil, fmt.Errorf(msg) } hostRefs = append(hostRefs, vmo.Summary.Runtime.Host.Reference()) } pc = property.DefaultCollector(nodeInfo.dataCenter.Client()) err = pc.Retrieve(ctx, hostRefs, []string{summary}, &hostMoList) if err != nil { klog.Errorf("SharedHost.getNodeHosts: unable to fetch hosts from datacenter %s: %w", nodeInfo.dataCenter.String(), err) return nil, err } var hosts []hostInfo for _, host := range hostMoList { hosts = append(hosts, hostInfo{hostMOID: host.Summary.Host.String(), hostUUID: host.Summary.Hardware.Uuid, datacenter: nodeInfo.dataCenter.String()}) } return hosts, nil } func (shared *sharedDatastore) getAttachedHosts(ctx context.Context, datastore *vclib.Datastore) ([]hostInfo, error) { var ds mo.Datastore pc := property.DefaultCollector(datastore.Client()) err := pc.RetrieveOne(ctx, datastore.Reference(), []string{hostsProperty}, &ds) if err != nil { return nil, err } mounts := make(map[types.ManagedObjectReference]types.DatastoreHostMount) var refs []types.ManagedObjectReference for _, host := range ds.Host { refs = append(refs, host.Key) mounts[host.Key] = host } var hs []mo.HostSystem err = pc.Retrieve(ctx, refs, []string{summary}, &hs) if err != nil { return nil, err } var hosts []hostInfo for _, h := range hs { hosts = append(hosts, hostInfo{hostUUID: h.Summary.Hardware.Uuid, hostMOID: h.Summary.Host.String()}) } return hosts, nil } </ins>

Discussion:
Currently whenever a vSphere volume is provisioned, we are looking at all nodes in the cluster and then fetching their hosts and then their datastores and then ensuring that selected datastore in present on all the nodes. This is done every time a new PVC is provisioned. It can be pretty expensive in large clusters and number of involved API calls can be big. /sig storage /area vsphere cc
The label(s) cannot be applied, because the repository doesn't have them <detailsIn response to : Currently whenever a vSphere volume is provisioned, we are looking at all nodes in the cluster and then fetching their hosts and then their datastores and then ensuring that selected datastore in present on all the nodes. This is done every time a new PVC is provisioned. /area vsphere Instructions for interacting with me using PR comments are available . If you have questions or suggestions related to my behavior, please file an issue against the repository. </details
/triage accepted
/assign