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azure_vmss.go
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azure_vmss.go
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/*
Copyright 2020 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 provider
import (
"errors"
"fmt"
"regexp"
"strconv"
"strings"
"sync"
"github.com/Azure/azure-sdk-for-go/services/compute/mgmt/2020-12-01/compute"
"github.com/Azure/azure-sdk-for-go/services/network/mgmt/2020-08-01/network"
"github.com/Azure/go-autorest/autorest/to"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
utilerrors "k8s.io/apimachinery/pkg/util/errors"
cloudprovider "k8s.io/cloud-provider"
"k8s.io/klog/v2"
utilnet "k8s.io/utils/net"
azcache "sigs.k8s.io/cloud-provider-azure/pkg/cache"
"sigs.k8s.io/cloud-provider-azure/pkg/consts"
"sigs.k8s.io/cloud-provider-azure/pkg/metrics"
)
var (
// ErrorNotVmssInstance indicates an instance is not belonging to any vmss.
ErrorNotVmssInstance = errors.New("not a vmss instance")
scaleSetNameRE = regexp.MustCompile(`.*/subscriptions/(?:.*)/Microsoft.Compute/virtualMachineScaleSets/(.+)/virtualMachines(?:.*)`)
resourceGroupRE = regexp.MustCompile(`.*/subscriptions/(?:.*)/resourceGroups/(.+)/providers/Microsoft.Compute/virtualMachineScaleSets/(?:.*)/virtualMachines(?:.*)`)
vmssIPConfigurationRE = regexp.MustCompile(`.*/subscriptions/(?:.*)/resourceGroups/(.+)/providers/Microsoft.Compute/virtualMachineScaleSets/(.+)/virtualMachines/(.+)/networkInterfaces(?:.*)`)
vmssPIPConfigurationRE = regexp.MustCompile(`.*/subscriptions/(?:.*)/resourceGroups/(.+)/providers/Microsoft.Compute/virtualMachineScaleSets/(.+)/virtualMachines/(.+)/networkInterfaces/(.+)/ipConfigurations/(.+)/publicIPAddresses/(.+)`)
vmssVMProviderIDRE = regexp.MustCompile(`azure:///subscriptions/(?:.*)/resourceGroups/(.+)/providers/Microsoft.Compute/virtualMachineScaleSets/(.+)/virtualMachines/(?:\d+)`)
)
// vmssMetaInfo contains the metadata for a VMSS.
type vmssMetaInfo struct {
vmssName string
resourceGroup string
}
// nodeIdentity identifies a node within a subscription.
type nodeIdentity struct {
resourceGroup string
vmssName string
nodeName string
}
// ScaleSet implements VMSet interface for Azure scale set.
type ScaleSet struct {
*Cloud
// availabilitySet is also required for scaleSet because some instances
// (e.g. control plane nodes) may not belong to any scale sets.
// this also allows for clusters with both VM and VMSS nodes.
availabilitySet VMSet
vmssCache *azcache.TimedCache
vmssVMCache *sync.Map // [resourcegroup/vmssname]*azcache.TimedCache
availabilitySetNodesCache *azcache.TimedCache
}
// newScaleSet creates a new ScaleSet.
func newScaleSet(az *Cloud) (VMSet, error) {
if az.Config.VmssVirtualMachinesCacheTTLInSeconds == 0 {
az.Config.VmssVirtualMachinesCacheTTLInSeconds = consts.VMSSVirtualMachinesCacheTTLDefaultInSeconds
}
var err error
as, err := newAvailabilitySet(az)
if err != nil {
return nil, err
}
ss := &ScaleSet{
Cloud: az,
availabilitySet: as,
vmssVMCache: &sync.Map{},
}
if !ss.DisableAvailabilitySetNodes {
ss.availabilitySetNodesCache, err = ss.newAvailabilitySetNodesCache()
if err != nil {
return nil, err
}
}
ss.vmssCache, err = ss.newVMSSCache()
if err != nil {
return nil, err
}
return ss, nil
}
func (ss *ScaleSet) getVMSS(vmssName string, crt azcache.AzureCacheReadType) (*compute.VirtualMachineScaleSet, error) {
getter := func(vmssName string) (*compute.VirtualMachineScaleSet, error) {
cached, err := ss.vmssCache.Get(consts.VMSSKey, crt)
if err != nil {
return nil, err
}
vmsses := cached.(*sync.Map)
if vmss, ok := vmsses.Load(vmssName); ok {
result := vmss.(*vmssEntry)
return result.vmss, nil
}
return nil, nil
}
vmss, err := getter(vmssName)
if err != nil {
return nil, err
}
if vmss != nil {
return vmss, nil
}
klog.V(2).Infof("Couldn't find VMSS with name %s, refreshing the cache", vmssName)
_ = ss.vmssCache.Delete(consts.VMSSKey)
vmss, err = getter(vmssName)
if err != nil {
return nil, err
}
if vmss == nil {
return nil, cloudprovider.InstanceNotFound
}
return vmss, nil
}
// getVmssVMByNodeIdentity find virtualMachineScaleSetVM by nodeIdentity, using node's parent VMSS cache.
// Returns cloudprovider.InstanceNotFound if the node does not belong to the scale set named in nodeIdentity.
func (ss *ScaleSet) getVmssVMByNodeIdentity(node *nodeIdentity, crt azcache.AzureCacheReadType) (string, string, *compute.VirtualMachineScaleSetVM, error) {
cacheKey, cache, err := ss.getVMSSVMCache(node.resourceGroup, node.vmssName)
if err != nil {
return "", "", nil, err
}
getter := func(nodeName string, crt azcache.AzureCacheReadType) (string, string, *compute.VirtualMachineScaleSetVM, bool, error) {
var found bool
cached, err := cache.Get(cacheKey, crt)
if err != nil {
return "", "", nil, found, err
}
virtualMachines := cached.(*sync.Map)
if vm, ok := virtualMachines.Load(nodeName); ok {
result := vm.(*vmssVirtualMachinesEntry)
found = true
return result.vmssName, result.instanceID, result.virtualMachine, found, nil
}
return "", "", nil, found, nil
}
_, err = getScaleSetVMInstanceID(node.nodeName)
if err != nil {
return "", "", nil, err
}
vmssName, instanceID, vm, found, err := getter(node.nodeName, crt)
if err != nil {
return "", "", nil, err
}
if !found {
klog.V(2).Infof("Couldn't find VMSS VM with nodeName %s, refreshing the cache", node.nodeName)
vmssName, instanceID, vm, found, err = getter(node.nodeName, azcache.CacheReadTypeForceRefresh)
if err != nil {
return "", "", nil, err
}
}
if found && vm != nil {
return vmssName, instanceID, vm, nil
}
if !found || vm == nil {
klog.Warningf("Unable to find node %s: %v", node.nodeName, cloudprovider.InstanceNotFound)
return "", "", nil, cloudprovider.InstanceNotFound
}
return vmssName, instanceID, vm, nil
}
// getVmssVM gets virtualMachineScaleSetVM by nodeName from cache.
// Returns cloudprovider.InstanceNotFound if nodeName does not belong to any scale set.
func (ss *ScaleSet) getVmssVM(nodeName string, crt azcache.AzureCacheReadType) (string, string, *compute.VirtualMachineScaleSetVM, error) {
node, err := ss.getNodeIdentityByNodeName(nodeName, crt)
if err != nil {
return "", "", nil, err
}
return ss.getVmssVMByNodeIdentity(node, crt)
}
// GetPowerStatusByNodeName returns the power state of the specified node.
func (ss *ScaleSet) GetPowerStatusByNodeName(name string) (powerState string, err error) {
managedByAS, err := ss.isNodeManagedByAvailabilitySet(name, azcache.CacheReadTypeUnsafe)
if err != nil {
klog.Errorf("Failed to check isNodeManagedByAvailabilitySet: %v", err)
return "", err
}
if managedByAS {
// vm is managed by availability set.
return ss.availabilitySet.GetPowerStatusByNodeName(name)
}
_, _, vm, err := ss.getVmssVM(name, azcache.CacheReadTypeDefault)
if err != nil {
return powerState, err
}
if vm.InstanceView != nil && vm.InstanceView.Statuses != nil {
statuses := *vm.InstanceView.Statuses
for _, status := range statuses {
state := to.String(status.Code)
if strings.HasPrefix(state, vmPowerStatePrefix) {
return strings.TrimPrefix(state, vmPowerStatePrefix), nil
}
}
}
// vm.InstanceView or vm.InstanceView.Statuses are nil when the VM is under deleting.
klog.V(3).Infof("InstanceView for node %q is nil, assuming it's stopped", name)
return vmPowerStateStopped, nil
}
// GetProvisioningStateByNodeName returns the provisioningState for the specified node.
func (ss *ScaleSet) GetProvisioningStateByNodeName(name string) (provisioningState string, err error) {
managedByAS, err := ss.isNodeManagedByAvailabilitySet(name, azcache.CacheReadTypeUnsafe)
if err != nil {
klog.Errorf("Failed to check isNodeManagedByAvailabilitySet: %v", err)
return "", err
}
if managedByAS {
// vm is managed by availability set.
return ss.availabilitySet.GetProvisioningStateByNodeName(name)
}
_, _, vm, err := ss.getVmssVM(name, azcache.CacheReadTypeDefault)
if err != nil {
return provisioningState, err
}
if vm.VirtualMachineScaleSetVMProperties == nil || vm.VirtualMachineScaleSetVMProperties.ProvisioningState == nil {
return provisioningState, nil
}
return to.String(vm.VirtualMachineScaleSetVMProperties.ProvisioningState), nil
}
// getCachedVirtualMachineByInstanceID gets scaleSetVMInfo from cache.
// The node must belong to one of scale sets.
func (ss *ScaleSet) getVmssVMByInstanceID(resourceGroup, scaleSetName, instanceID string, crt azcache.AzureCacheReadType) (*compute.VirtualMachineScaleSetVM, error) {
cacheKey, cache, err := ss.getVMSSVMCache(resourceGroup, scaleSetName)
if err != nil {
return nil, err
}
getter := func(crt azcache.AzureCacheReadType) (vm *compute.VirtualMachineScaleSetVM, found bool, err error) {
cached, err := cache.Get(cacheKey, crt)
if err != nil {
return nil, false, err
}
virtualMachines := cached.(*sync.Map)
virtualMachines.Range(func(key, value interface{}) bool {
vmEntry := value.(*vmssVirtualMachinesEntry)
if strings.EqualFold(vmEntry.resourceGroup, resourceGroup) &&
strings.EqualFold(vmEntry.vmssName, scaleSetName) &&
strings.EqualFold(vmEntry.instanceID, instanceID) {
vm = vmEntry.virtualMachine
found = true
return false
}
return true
})
return vm, found, nil
}
vm, found, err := getter(crt)
if err != nil {
return nil, err
}
if !found {
klog.V(2).Infof("Couldn't find VMSS VM with scaleSetName %q and instanceID %q, refreshing the cache", scaleSetName, instanceID)
vm, found, err = getter(azcache.CacheReadTypeForceRefresh)
if err != nil {
return nil, err
}
}
if found && vm != nil {
return vm, nil
}
if found && vm == nil {
klog.V(2).Infof("Couldn't find VMSS VM with scaleSetName %q and instanceID %q, refreshing the cache if it is expired", scaleSetName, instanceID)
vm, found, err = getter(azcache.CacheReadTypeDefault)
if err != nil {
return nil, err
}
}
if !found || vm == nil {
return nil, cloudprovider.InstanceNotFound
}
return vm, nil
}
// GetInstanceIDByNodeName gets the cloud provider ID by node name.
// It must return ("", cloudprovider.InstanceNotFound) if the instance does
// not exist or is no longer running.
func (ss *ScaleSet) GetInstanceIDByNodeName(name string) (string, error) {
managedByAS, err := ss.isNodeManagedByAvailabilitySet(name, azcache.CacheReadTypeUnsafe)
if err != nil {
klog.Errorf("Failed to check isNodeManagedByAvailabilitySet: %v", err)
return "", err
}
if managedByAS {
// vm is managed by availability set.
return ss.availabilitySet.GetInstanceIDByNodeName(name)
}
_, _, vm, err := ss.getVmssVM(name, azcache.CacheReadTypeUnsafe)
if err != nil {
klog.Errorf("Unable to find node %s: %v", name, err)
return "", err
}
resourceID := *vm.ID
convertedResourceID, err := convertResourceGroupNameToLower(resourceID)
if err != nil {
klog.Errorf("convertResourceGroupNameToLower failed with error: %v", err)
return "", err
}
return convertedResourceID, nil
}
// GetNodeNameByProviderID gets the node name by provider ID.
// providerID example:
// 1. vmas providerID: azure:///subscriptions/subsid/resourceGroups/rg/providers/Microsoft.Compute/virtualMachines/aks-nodepool1-27053986-0
// 2. vmss providerID:
// azure:///subscriptions/subsid/resourceGroups/rg/providers/Microsoft.Compute/virtualMachineScaleSets/aks-agentpool-22126781-vmss/virtualMachines/1
// /subscriptions/subsid/resourceGroups/rg/providers/Microsoft.Compute/virtualMachineScaleSets/aks-agentpool-22126781-vmss/virtualMachines/k8s-agentpool-36841236-vmss_1
func (ss *ScaleSet) GetNodeNameByProviderID(providerID string) (types.NodeName, error) {
// NodeName is not part of providerID for vmss instances.
scaleSetName, err := extractScaleSetNameByProviderID(providerID)
if err != nil {
klog.V(4).Infof("Can not extract scale set name from providerID (%s), assuming it is managed by availability set: %v", providerID, err)
return ss.availabilitySet.GetNodeNameByProviderID(providerID)
}
resourceGroup, err := extractResourceGroupByProviderID(providerID)
if err != nil {
return "", fmt.Errorf("error of extracting resource group for node %q", providerID)
}
instanceID, err := getLastSegment(providerID, "/")
if err != nil {
klog.V(4).Infof("Can not extract instanceID from providerID (%s), assuming it is managed by availability set: %v", providerID, err)
return ss.availabilitySet.GetNodeNameByProviderID(providerID)
}
// instanceID contains scaleSetName (returned by disk.ManagedBy), e.g. k8s-agentpool-36841236-vmss_1
if strings.HasPrefix(strings.ToLower(instanceID), strings.ToLower(scaleSetName)) {
instanceID, err = getLastSegment(instanceID, "_")
if err != nil {
return "", err
}
}
vm, err := ss.getVmssVMByInstanceID(resourceGroup, scaleSetName, instanceID, azcache.CacheReadTypeUnsafe)
if err != nil {
klog.Errorf("Unable to find node by providerID %s: %v", providerID, err)
return "", err
}
if vm.OsProfile != nil && vm.OsProfile.ComputerName != nil {
nodeName := strings.ToLower(*vm.OsProfile.ComputerName)
return types.NodeName(nodeName), nil
}
return "", nil
}
// GetInstanceTypeByNodeName gets the instance type by node name.
func (ss *ScaleSet) GetInstanceTypeByNodeName(name string) (string, error) {
managedByAS, err := ss.isNodeManagedByAvailabilitySet(name, azcache.CacheReadTypeUnsafe)
if err != nil {
klog.Errorf("Failed to check isNodeManagedByAvailabilitySet: %v", err)
return "", err
}
if managedByAS {
// vm is managed by availability set.
return ss.availabilitySet.GetInstanceTypeByNodeName(name)
}
_, _, vm, err := ss.getVmssVM(name, azcache.CacheReadTypeUnsafe)
if err != nil {
return "", err
}
if vm.Sku != nil && vm.Sku.Name != nil {
return *vm.Sku.Name, nil
}
return "", nil
}
// GetZoneByNodeName gets availability zone for the specified node. If the node is not running
// with availability zone, then it returns fault domain.
func (ss *ScaleSet) GetZoneByNodeName(name string) (cloudprovider.Zone, error) {
managedByAS, err := ss.isNodeManagedByAvailabilitySet(name, azcache.CacheReadTypeUnsafe)
if err != nil {
klog.Errorf("Failed to check isNodeManagedByAvailabilitySet: %v", err)
return cloudprovider.Zone{}, err
}
if managedByAS {
// vm is managed by availability set.
return ss.availabilitySet.GetZoneByNodeName(name)
}
_, _, vm, err := ss.getVmssVM(name, azcache.CacheReadTypeUnsafe)
if err != nil {
return cloudprovider.Zone{}, err
}
var failureDomain string
if vm.Zones != nil && len(*vm.Zones) > 0 {
// Get availability zone for the node.
zones := *vm.Zones
zoneID, err := strconv.Atoi(zones[0])
if err != nil {
return cloudprovider.Zone{}, fmt.Errorf("failed to parse zone %q: %w", zones, err)
}
failureDomain = ss.makeZone(to.String(vm.Location), zoneID)
} else if vm.InstanceView != nil && vm.InstanceView.PlatformFaultDomain != nil {
// Availability zone is not used for the node, falling back to fault domain.
failureDomain = strconv.Itoa(int(*vm.InstanceView.PlatformFaultDomain))
} else {
err = fmt.Errorf("failed to get zone info")
klog.Errorf("GetZoneByNodeName: got unexpected error %v", err)
_ = ss.deleteCacheForNode(name)
return cloudprovider.Zone{}, err
}
return cloudprovider.Zone{
FailureDomain: strings.ToLower(failureDomain),
Region: strings.ToLower(to.String(vm.Location)),
}, nil
}
// GetPrimaryVMSetName returns the VM set name depending on the configured vmType.
// It returns config.PrimaryScaleSetName for vmss and config.PrimaryAvailabilitySetName for standard vmType.
func (ss *ScaleSet) GetPrimaryVMSetName() string {
return ss.Config.PrimaryScaleSetName
}
// GetIPByNodeName gets machine private IP and public IP by node name.
func (ss *ScaleSet) GetIPByNodeName(nodeName string) (string, string, error) {
nic, err := ss.GetPrimaryInterface(nodeName)
if err != nil {
klog.Errorf("error: ss.GetIPByNodeName(%s), GetPrimaryInterface(%q), err=%v", nodeName, nodeName, err)
return "", "", err
}
ipConfig, err := getPrimaryIPConfig(nic)
if err != nil {
klog.Errorf("error: ss.GetIPByNodeName(%s), getPrimaryIPConfig(%v), err=%v", nodeName, nic, err)
return "", "", err
}
internalIP := *ipConfig.PrivateIPAddress
publicIP := ""
if ipConfig.PublicIPAddress != nil && ipConfig.PublicIPAddress.ID != nil {
pipID := *ipConfig.PublicIPAddress.ID
matches := vmssPIPConfigurationRE.FindStringSubmatch(pipID)
if len(matches) == 7 {
resourceGroupName := matches[1]
virtualMachineScaleSetName := matches[2]
virtualMachineIndex := matches[3]
networkInterfaceName := matches[4]
IPConfigurationName := matches[5]
publicIPAddressName := matches[6]
pip, existsPip, err := ss.getVMSSPublicIPAddress(resourceGroupName, virtualMachineScaleSetName, virtualMachineIndex, networkInterfaceName, IPConfigurationName, publicIPAddressName)
if err != nil {
klog.Errorf("ss.getVMSSPublicIPAddress() failed with error: %v", err)
return "", "", err
}
if existsPip && pip.IPAddress != nil {
publicIP = *pip.IPAddress
}
} else {
klog.Warningf("Failed to get VMSS Public IP with ID %s", pipID)
}
}
return internalIP, publicIP, nil
}
func (ss *ScaleSet) getVMSSPublicIPAddress(resourceGroupName string, virtualMachineScaleSetName string, virtualMachineIndex string, networkInterfaceName string, IPConfigurationName string, publicIPAddressName string) (network.PublicIPAddress, bool, error) {
ctx, cancel := getContextWithCancel()
defer cancel()
pip, err := ss.PublicIPAddressesClient.GetVirtualMachineScaleSetPublicIPAddress(ctx, resourceGroupName, virtualMachineScaleSetName, virtualMachineIndex, networkInterfaceName, IPConfigurationName, publicIPAddressName, "")
exists, rerr := checkResourceExistsFromError(err)
if rerr != nil {
return pip, false, rerr.Error()
}
if !exists {
klog.V(2).Infof("Public IP %q not found", publicIPAddressName)
return pip, false, nil
}
return pip, exists, nil
}
// returns a list of private ips assigned to node
// TODO (khenidak): This should read all nics, not just the primary
// allowing users to split ipv4/v6 on multiple nics
func (ss *ScaleSet) GetPrivateIPsByNodeName(nodeName string) ([]string, error) {
ips := make([]string, 0)
nic, err := ss.GetPrimaryInterface(nodeName)
if err != nil {
klog.Errorf("error: ss.GetIPByNodeName(%s), GetPrimaryInterface(%q), err=%v", nodeName, nodeName, err)
return ips, err
}
if nic.IPConfigurations == nil {
return ips, fmt.Errorf("nic.IPConfigurations for nic (nicname=%q) is nil", *nic.Name)
}
for _, ipConfig := range *(nic.IPConfigurations) {
if ipConfig.PrivateIPAddress != nil {
ips = append(ips, *(ipConfig.PrivateIPAddress))
}
}
return ips, nil
}
// This returns the full identifier of the primary NIC for the given VM.
func (ss *ScaleSet) getPrimaryInterfaceID(machine compute.VirtualMachineScaleSetVM) (string, error) {
if machine.NetworkProfile == nil || machine.NetworkProfile.NetworkInterfaces == nil {
return "", fmt.Errorf("failed to find the network interfaces for vm %s", to.String(machine.Name))
}
if len(*machine.NetworkProfile.NetworkInterfaces) == 1 {
return *(*machine.NetworkProfile.NetworkInterfaces)[0].ID, nil
}
for _, ref := range *machine.NetworkProfile.NetworkInterfaces {
if to.Bool(ref.Primary) {
return *ref.ID, nil
}
}
return "", fmt.Errorf("failed to find a primary nic for the vm. vmname=%q", to.String(machine.Name))
}
// getVmssMachineID returns the full identifier of a vmss virtual machine.
func (az *Cloud) getVmssMachineID(subscriptionID, resourceGroup, scaleSetName, instanceID string) string {
return fmt.Sprintf(
consts.VmssMachineIDTemplate,
subscriptionID,
strings.ToLower(resourceGroup),
scaleSetName,
instanceID)
}
// machineName is composed of computerNamePrefix and 36-based instanceID.
// And instanceID part if in fixed length of 6 characters.
// Refer https://msftstack.wordpress.com/2017/05/10/figuring-out-azure-vm-scale-set-machine-names/.
func getScaleSetVMInstanceID(machineName string) (string, error) {
nameLength := len(machineName)
if nameLength < 6 {
return "", ErrorNotVmssInstance
}
instanceID, err := strconv.ParseUint(machineName[nameLength-6:], 36, 64)
if err != nil {
return "", ErrorNotVmssInstance
}
return fmt.Sprintf("%d", instanceID), nil
}
// extractScaleSetNameByProviderID extracts the scaleset name by vmss node's ProviderID.
func extractScaleSetNameByProviderID(providerID string) (string, error) {
matches := scaleSetNameRE.FindStringSubmatch(providerID)
if len(matches) != 2 {
return "", ErrorNotVmssInstance
}
return matches[1], nil
}
// extractResourceGroupByProviderID extracts the resource group name by vmss node's ProviderID.
func extractResourceGroupByProviderID(providerID string) (string, error) {
matches := resourceGroupRE.FindStringSubmatch(providerID)
if len(matches) != 2 {
return "", ErrorNotVmssInstance
}
return matches[1], nil
}
// listScaleSets lists all scale sets with orchestrationMode ScaleSetVM.
func (ss *ScaleSet) listScaleSets(resourceGroup string) ([]string, error) {
ctx, cancel := getContextWithCancel()
defer cancel()
allScaleSets, rerr := ss.VirtualMachineScaleSetsClient.List(ctx, resourceGroup)
if rerr != nil {
klog.Errorf("VirtualMachineScaleSetsClient.List failed: %v", rerr)
return nil, rerr.Error()
}
ssNames := make([]string, 0)
for _, vmss := range allScaleSets {
name := *vmss.Name
if vmss.Sku != nil && to.Int64(vmss.Sku.Capacity) == 0 {
klog.V(3).Infof("Capacity of VMSS %q is 0, skipping", name)
continue
}
if vmss.VirtualMachineScaleSetProperties == nil || vmss.VirtualMachineScaleSetProperties.VirtualMachineProfile == nil {
klog.V(3).Infof("VMSS %q orchestrationMode is VirtualMachine, skipping", name)
continue
}
ssNames = append(ssNames, name)
}
return ssNames, nil
}
// getNodeIdentityByNodeName use the VMSS cache to find a node's resourcegroup and vmss, returned in a nodeIdentity.
func (ss *ScaleSet) getNodeIdentityByNodeName(nodeName string, crt azcache.AzureCacheReadType) (*nodeIdentity, error) {
getter := func(nodeName string, crt azcache.AzureCacheReadType) (*nodeIdentity, error) {
node := &nodeIdentity{
nodeName: nodeName,
}
cached, err := ss.vmssCache.Get(consts.VMSSKey, crt)
if err != nil {
return nil, err
}
vmsses := cached.(*sync.Map)
vmsses.Range(func(key, value interface{}) bool {
v := value.(*vmssEntry)
if v.vmss.Name == nil {
return true
}
vmssPrefix := *v.vmss.Name
if v.vmss.VirtualMachineProfile != nil &&
v.vmss.VirtualMachineProfile.OsProfile != nil &&
v.vmss.VirtualMachineProfile.OsProfile.ComputerNamePrefix != nil {
vmssPrefix = *v.vmss.VirtualMachineProfile.OsProfile.ComputerNamePrefix
}
if strings.EqualFold(vmssPrefix, nodeName[:len(nodeName)-6]) {
node.vmssName = *v.vmss.Name
node.resourceGroup = v.resourceGroup
return false
}
return true
})
return node, nil
}
if _, err := getScaleSetVMInstanceID(nodeName); err != nil {
return nil, err
}
node, err := getter(nodeName, crt)
if err != nil {
return nil, err
}
if node.vmssName != "" {
return node, nil
}
klog.V(2).Infof("Couldn't find VMSS for node %s, refreshing the cache", nodeName)
node, err = getter(nodeName, azcache.CacheReadTypeForceRefresh)
if err != nil {
return nil, err
}
if node.vmssName == "" {
klog.Warningf("Unable to find node %s: %v", nodeName, cloudprovider.InstanceNotFound)
return nil, cloudprovider.InstanceNotFound
}
return node, nil
}
// listScaleSetVMs lists VMs belonging to the specified scale set.
func (ss *ScaleSet) listScaleSetVMs(scaleSetName, resourceGroup string) ([]compute.VirtualMachineScaleSetVM, error) {
ctx, cancel := getContextWithCancel()
defer cancel()
allVMs, rerr := ss.VirtualMachineScaleSetVMsClient.List(ctx, resourceGroup, scaleSetName, string(compute.InstanceViewTypesInstanceView))
if rerr != nil {
klog.Errorf("VirtualMachineScaleSetVMsClient.List(%s, %s) failed: %v", resourceGroup, scaleSetName, rerr)
if rerr.IsNotFound() {
return nil, cloudprovider.InstanceNotFound
}
return nil, rerr.Error()
}
return allVMs, nil
}
// getAgentPoolScaleSets lists the virtual machines for the resource group and then builds
// a list of scale sets that match the nodes available to k8s.
func (ss *ScaleSet) getAgentPoolScaleSets(nodes []*v1.Node) (*[]string, error) {
agentPoolScaleSets := &[]string{}
for nx := range nodes {
if isControlPlaneNode(nodes[nx]) {
continue
}
nodeName := nodes[nx].Name
shouldExcludeLoadBalancer, err := ss.ShouldNodeExcludedFromLoadBalancer(nodeName)
if err != nil {
klog.Errorf("ShouldNodeExcludedFromLoadBalancer(%s) failed with error: %v", nodeName, err)
return nil, err
}
if shouldExcludeLoadBalancer {
continue
}
ssName, _, _, err := ss.getVmssVM(nodeName, azcache.CacheReadTypeDefault)
if err != nil {
return nil, err
}
if ssName == "" {
klog.V(3).Infof("Node %q is not belonging to any known scale sets", nodeName)
continue
}
*agentPoolScaleSets = append(*agentPoolScaleSets, ssName)
}
return agentPoolScaleSets, nil
}
// GetVMSetNames selects all possible scale sets for service load balancer. If the service has
// no loadbalancer mode annotation returns the primary VMSet. If service annotation
// for loadbalancer exists then return the eligible VMSet.
func (ss *ScaleSet) GetVMSetNames(service *v1.Service, nodes []*v1.Node) (*[]string, error) {
hasMode, isAuto, serviceVMSetName := ss.getServiceLoadBalancerMode(service)
useSingleSLB := ss.useStandardLoadBalancer() && !ss.EnableMultipleStandardLoadBalancers
if !hasMode || useSingleSLB {
// no mode specified in service annotation or use single SLB mode
// default to PrimaryScaleSetName
scaleSetNames := &[]string{ss.Config.PrimaryScaleSetName}
return scaleSetNames, nil
}
scaleSetNames, err := ss.getAgentPoolScaleSets(nodes)
if err != nil {
klog.Errorf("ss.GetVMSetNames - getAgentPoolScaleSets failed err=(%v)", err)
return nil, err
}
if len(*scaleSetNames) == 0 {
klog.Errorf("ss.GetVMSetNames - No scale sets found for nodes in the cluster, node count(%d)", len(nodes))
return nil, fmt.Errorf("no scale sets found for nodes, node count(%d)", len(nodes))
}
if !isAuto {
found := false
for asx := range *scaleSetNames {
if strings.EqualFold((*scaleSetNames)[asx], serviceVMSetName) {
found = true
serviceVMSetName = (*scaleSetNames)[asx]
break
}
}
if !found {
klog.Errorf("ss.GetVMSetNames - scale set (%s) in service annotation not found", serviceVMSetName)
return nil, fmt.Errorf("scale set (%s) - not found", serviceVMSetName)
}
return &[]string{serviceVMSetName}, nil
}
return scaleSetNames, nil
}
// extractResourceGroupByVMSSNicID extracts the resource group name by vmss nicID.
func extractResourceGroupByVMSSNicID(nicID string) (string, error) {
matches := vmssIPConfigurationRE.FindStringSubmatch(nicID)
if len(matches) != 4 {
return "", fmt.Errorf("error of extracting resourceGroup from nicID %q", nicID)
}
return matches[1], nil
}
// GetPrimaryInterface gets machine primary network interface by node name and vmSet.
func (ss *ScaleSet) GetPrimaryInterface(nodeName string) (network.Interface, error) {
managedByAS, err := ss.isNodeManagedByAvailabilitySet(nodeName, azcache.CacheReadTypeDefault)
if err != nil {
klog.Errorf("Failed to check isNodeManagedByAvailabilitySet: %v", err)
return network.Interface{}, err
}
if managedByAS {
// vm is managed by availability set.
return ss.availabilitySet.GetPrimaryInterface(nodeName)
}
ssName, instanceID, vm, err := ss.getVmssVM(nodeName, azcache.CacheReadTypeDefault)
if err != nil {
// VM is availability set, but not cached yet in availabilitySetNodesCache.
if errors.Is(err, ErrorNotVmssInstance) {
return ss.availabilitySet.GetPrimaryInterface(nodeName)
}
klog.Errorf("error: ss.GetPrimaryInterface(%s), ss.getVmssVM(%s), err=%v", nodeName, nodeName, err)
return network.Interface{}, err
}
primaryInterfaceID, err := ss.getPrimaryInterfaceID(*vm)
if err != nil {
klog.Errorf("error: ss.GetPrimaryInterface(%s), ss.getPrimaryInterfaceID(), err=%v", nodeName, err)
return network.Interface{}, err
}
nicName, err := getLastSegment(primaryInterfaceID, "/")
if err != nil {
klog.Errorf("error: ss.GetPrimaryInterface(%s), getLastSegment(%s), err=%v", nodeName, primaryInterfaceID, err)
return network.Interface{}, err
}
resourceGroup, err := extractResourceGroupByVMSSNicID(primaryInterfaceID)
if err != nil {
return network.Interface{}, err
}
ctx, cancel := getContextWithCancel()
defer cancel()
nic, rerr := ss.InterfacesClient.GetVirtualMachineScaleSetNetworkInterface(ctx, resourceGroup, ssName, instanceID, nicName, "")
if rerr != nil {
exists, realErr := checkResourceExistsFromError(rerr)
if realErr != nil {
klog.Errorf("error: ss.GetPrimaryInterface(%s), ss.GetVirtualMachineScaleSetNetworkInterface.Get(%s, %s, %s), err=%v", nodeName, resourceGroup, ssName, nicName, realErr)
return network.Interface{}, realErr.Error()
}
if !exists {
return network.Interface{}, cloudprovider.InstanceNotFound
}
}
// Fix interface's location, which is required when updating the interface.
// TODO: is this a bug of azure SDK?
if nic.Location == nil || *nic.Location == "" {
nic.Location = vm.Location
}
return nic, nil
}
// getPrimaryNetworkInterfaceConfiguration gets primary network interface configuration for scale set virtual machine.
func (ss *ScaleSet) getPrimaryNetworkInterfaceConfiguration(networkConfigurations []compute.VirtualMachineScaleSetNetworkConfiguration, nodeName string) (*compute.VirtualMachineScaleSetNetworkConfiguration, error) {
if len(networkConfigurations) == 1 {
return &networkConfigurations[0], nil
}
for idx := range networkConfigurations {
networkConfig := &networkConfigurations[idx]
if networkConfig.Primary != nil && *networkConfig.Primary {
return networkConfig, nil
}
}
return nil, fmt.Errorf("failed to find a primary network configuration for the scale set VM %q", nodeName)
}
// getPrimaryNetworkInterfaceConfigurationForScaleSet gets primary network interface configuration for scale set.
func (ss *ScaleSet) getPrimaryNetworkInterfaceConfigurationForScaleSet(networkConfigurations []compute.VirtualMachineScaleSetNetworkConfiguration, vmssName string) (*compute.VirtualMachineScaleSetNetworkConfiguration, error) {
if len(networkConfigurations) == 1 {
return &networkConfigurations[0], nil
}
for idx := range networkConfigurations {
networkConfig := &networkConfigurations[idx]
if networkConfig.Primary != nil && *networkConfig.Primary {
return networkConfig, nil
}
}
return nil, fmt.Errorf("failed to find a primary network configuration for the scale set %q", vmssName)
}
func getPrimaryIPConfigFromVMSSNetworkConfig(config *compute.VirtualMachineScaleSetNetworkConfiguration) (*compute.VirtualMachineScaleSetIPConfiguration, error) {
ipConfigurations := *config.IPConfigurations
if len(ipConfigurations) == 1 {
return &ipConfigurations[0], nil
}
for idx := range ipConfigurations {
ipConfig := &ipConfigurations[idx]
if ipConfig.Primary != nil && *ipConfig.Primary {
return ipConfig, nil
}
}
return nil, fmt.Errorf("failed to find a primary IP configuration")
}
func (ss *ScaleSet) getConfigForScaleSetByIPFamily(config *compute.VirtualMachineScaleSetNetworkConfiguration, nodeName string, IPv6 bool) (*compute.VirtualMachineScaleSetIPConfiguration, error) {
ipConfigurations := *config.IPConfigurations
var ipVersion compute.IPVersion
if IPv6 {
ipVersion = compute.IPVersionIPv6
} else {
ipVersion = compute.IPVersionIPv4
}
for idx := range ipConfigurations {
ipConfig := &ipConfigurations[idx]
if ipConfig.PrivateIPAddressVersion == ipVersion {
return ipConfig, nil
}
}
return nil, fmt.Errorf("failed to find a IPconfiguration(IPv6=%v) for the scale set VM %q", IPv6, nodeName)
}
// EnsureHostInPool ensures the given VM's Primary NIC's Primary IP Configuration is
// participating in the specified LoadBalancer Backend Pool, which returns (resourceGroup, vmasName, instanceID, vmssVM, error).
func (ss *ScaleSet) EnsureHostInPool(service *v1.Service, nodeName types.NodeName, backendPoolID string, vmSetNameOfLB string, isInternal bool) (string, string, string, *compute.VirtualMachineScaleSetVM, error) {
vmName := mapNodeNameToVMName(nodeName)
ssName, instanceID, vm, err := ss.getVmssVM(vmName, azcache.CacheReadTypeDefault)
if err != nil {
klog.Errorf("EnsureHostInPool: failed to get VMSS VM %s: %v", vmName, err)
return "", "", "", nil, err
}
klog.V(2).Infof("ensuring node %q of scaleset %q in LB backendpool %q", nodeName, ssName, backendPoolID)
// Check scale set name:
// - For basic SKU load balancer, return nil if the node's scale set is mismatched with vmSetNameOfLB.
// - For single standard SKU load balancer, backend could belong to multiple VMSS, so we
// don't check vmSet for it.
// - For multiple standard SKU load balancers, the behavior is similar to the basic load balancer
needCheck := false
if !ss.useStandardLoadBalancer() {
// need to check the vmSet name when using the basic LB
needCheck = true
} else if ss.EnableMultipleStandardLoadBalancers {
// need to check the vmSet name when using multiple standard LBs
needCheck = true
}
if vmSetNameOfLB != "" && needCheck && !strings.EqualFold(vmSetNameOfLB, ssName) {
klog.V(3).Infof("EnsureHostInPool skips node %s because it is not in the ScaleSet %s", vmName, vmSetNameOfLB)
return "", "", "", nil, nil
}
// Find primary network interface configuration.
if vm.NetworkProfileConfiguration.NetworkInterfaceConfigurations == nil {
klog.V(4).Infof("EnsureHostInPool: cannot obtain the primary network interface configuration, of vm %s, probably because the vm's being deleted", vmName)
return "", "", "", nil, nil
}
networkInterfaceConfigurations := *vm.NetworkProfileConfiguration.NetworkInterfaceConfigurations
primaryNetworkInterfaceConfiguration, err := ss.getPrimaryNetworkInterfaceConfiguration(networkInterfaceConfigurations, vmName)
if err != nil {
return "", "", "", nil, err
}
var primaryIPConfiguration *compute.VirtualMachineScaleSetIPConfiguration
ipv6 := utilnet.IsIPv6String(service.Spec.ClusterIP)
// Find primary network interface configuration.
if !ss.Cloud.ipv6DualStackEnabled && !ipv6 {