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azure.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 (
"context"
"errors"
"fmt"
"io"
"net/http"
"os"
"strings"
"sync"
"time"
ratelimitconfig "sigs.k8s.io/cloud-provider-azure/pkg/provider/config"
"github.com/Azure/go-autorest/autorest"
"github.com/Azure/go-autorest/autorest/adal"
"github.com/Azure/go-autorest/autorest/azure"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/informers"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/scheme"
v1core "k8s.io/client-go/kubernetes/typed/core/v1"
corelisters "k8s.io/client-go/listers/core/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/flowcontrol"
cloudprovider "k8s.io/cloud-provider"
"k8s.io/klog/v2"
azclients "sigs.k8s.io/cloud-provider-azure/pkg/azureclients"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/blobclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/containerserviceclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/deploymentclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/diskclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/fileclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/interfaceclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/loadbalancerclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/privatednsclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/privatednszonegroupclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/privateendpointclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/privatelinkserviceclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/publicipclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/routeclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/routetableclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/securitygroupclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/snapshotclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/storageaccountclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/subnetclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/virtualnetworklinksclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/vmasclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/vmclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/vmsizeclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/vmssclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/vmssvmclient"
"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/zoneclient"
azcache "sigs.k8s.io/cloud-provider-azure/pkg/cache"
"sigs.k8s.io/cloud-provider-azure/pkg/consts"
nodemanager "sigs.k8s.io/cloud-provider-azure/pkg/nodemanager"
"sigs.k8s.io/cloud-provider-azure/pkg/retry"
"sigs.k8s.io/yaml"
)
var (
// Master nodes are not added to standard load balancer by default.
defaultExcludeMasterFromStandardLB = true
// Outbound SNAT is enabled by default.
defaultDisableOutboundSNAT = false
// RouteUpdateWaitingInSeconds is 30 seconds by default.
defaultRouteUpdateWaitingInSeconds = 30
)
// Config holds the configuration parsed from the --cloud-config flag
// All fields are required unless otherwise specified
// NOTE: Cloud config files should follow the same Kubernetes deprecation policy as
// flags or CLIs. Config fields should not change behavior in incompatible ways and
// should be deprecated for at least 2 release prior to removing.
// See https://kubernetes.io/docs/reference/using-api/deprecation-policy/#deprecating-a-flag-or-cli
// for more details.
type Config struct {
ratelimitconfig.AzureAuthConfig
ratelimitconfig.CloudProviderRateLimitConfig
// The cloud configure type for Azure cloud provider. Supported values are file, secret and merge.
CloudConfigType cloudConfigType `json:"cloudConfigType,omitempty" yaml:"cloudConfigType,omitempty"`
// The name of the resource group that the cluster is deployed in
ResourceGroup string `json:"resourceGroup,omitempty" yaml:"resourceGroup,omitempty"`
// The location of the resource group that the cluster is deployed in
Location string `json:"location,omitempty" yaml:"location,omitempty"`
// The name of site where the cluster will be deployed to that is more granular than the region specified by the "location" field.
// Currently only public ip, load balancer and managed disks support this.
ExtendedLocationName string `json:"extendedLocationName,omitempty" yaml:"extendedLocationName,omitempty"`
// The type of site that is being targeted.
// Currently only public ip, load balancer and managed disks support this.
ExtendedLocationType string `json:"extendedLocationType,omitempty" yaml:"extendedLocationType,omitempty"`
// The name of the VNet that the cluster is deployed in
VnetName string `json:"vnetName,omitempty" yaml:"vnetName,omitempty"`
// The name of the resource group that the Vnet is deployed in
VnetResourceGroup string `json:"vnetResourceGroup,omitempty" yaml:"vnetResourceGroup,omitempty"`
// The name of the subnet that the cluster is deployed in
SubnetName string `json:"subnetName,omitempty" yaml:"subnetName,omitempty"`
// The name of the security group attached to the cluster's subnet
SecurityGroupName string `json:"securityGroupName,omitempty" yaml:"securityGroupName,omitempty"`
// The name of the resource group that the security group is deployed in
SecurityGroupResourceGroup string `json:"securityGroupResourceGroup,omitempty" yaml:"securityGroupResourceGroup,omitempty"`
// (Optional in 1.6) The name of the route table attached to the subnet that the cluster is deployed in
RouteTableName string `json:"routeTableName,omitempty" yaml:"routeTableName,omitempty"`
// The name of the resource group that the RouteTable is deployed in
RouteTableResourceGroup string `json:"routeTableResourceGroup,omitempty" yaml:"routeTableResourceGroup,omitempty"`
// (Optional) The name of the availability set that should be used as the load balancer backend
// If this is set, the Azure cloudprovider will only add nodes from that availability set to the load
// balancer backend pool. If this is not set, and multiple agent pools (availability sets) are used, then
// the cloudprovider will try to add all nodes to a single backend pool which is forbidden.
// In other words, if you use multiple agent pools (availability sets), you MUST set this field.
PrimaryAvailabilitySetName string `json:"primaryAvailabilitySetName,omitempty" yaml:"primaryAvailabilitySetName,omitempty"`
// The type of azure nodes. Candidate values are: vmss and standard.
// If not set, it will be default to standard.
VMType string `json:"vmType,omitempty" yaml:"vmType,omitempty"`
// The name of the scale set that should be used as the load balancer backend.
// If this is set, the Azure cloudprovider will only add nodes from that scale set to the load
// balancer backend pool. If this is not set, and multiple agent pools (scale sets) are used, then
// the cloudprovider will try to add all nodes to a single backend pool which is forbidden in the basic sku.
// In other words, if you use multiple agent pools (scale sets), and loadBalancerSku is set to basic, you MUST set this field.
PrimaryScaleSetName string `json:"primaryScaleSetName,omitempty" yaml:"primaryScaleSetName,omitempty"`
// Tags determines what tags shall be applied to the shared resources managed by controller manager, which
// includes load balancer, security group and route table. The supported format is `a=b,c=d,...`. After updated
// this config, the old tags would be replaced by the new ones.
// Because special characters are not supported in "tags" configuration, "tags" support would be removed in a future release,
// please consider migrating the config to "tagsMap".
Tags string `json:"tags,omitempty" yaml:"tags,omitempty"`
// TagsMap is similar to Tags but holds tags with special characters such as `=` and `,`.
TagsMap map[string]string `json:"tagsMap,omitempty" yaml:"tagsMap,omitempty"`
// SystemTags determines the tag keys managed by cloud provider. If it is not set, no tags would be deleted if
// the `Tags` is changed. However, the old tags would be deleted if they are neither included in `Tags` nor
// in `SystemTags` after the update of `Tags`.
SystemTags string `json:"systemTags,omitempty" yaml:"systemTags,omitempty"`
// Sku of Load Balancer and Public IP. Candidate values are: basic and standard.
// If not set, it will be default to basic.
LoadBalancerSku string `json:"loadBalancerSku,omitempty" yaml:"loadBalancerSku,omitempty"`
// LoadBalancerName determines the specific name of the load balancer user want to use, working with
// LoadBalancerResourceGroup
LoadBalancerName string `json:"loadBalancerName,omitempty" yaml:"loadBalancerName,omitempty"`
// LoadBalancerResourceGroup determines the specific resource group of the load balancer user want to use, working
// with LoadBalancerName
LoadBalancerResourceGroup string `json:"loadBalancerResourceGroup,omitempty" yaml:"loadBalancerResourceGroup,omitempty"`
// PreConfiguredBackendPoolLoadBalancerTypes determines whether the LoadBalancer BackendPool has been preconfigured.
// Candidate values are:
// "": exactly with today (not pre-configured for any LBs)
// "internal": for internal LoadBalancer
// "external": for external LoadBalancer
// "all": for both internal and external LoadBalancer
PreConfiguredBackendPoolLoadBalancerTypes string `json:"preConfiguredBackendPoolLoadBalancerTypes,omitempty" yaml:"preConfiguredBackendPoolLoadBalancerTypes,omitempty"`
// DisableAvailabilitySetNodes disables VMAS nodes support when "VMType" is set to "vmss".
DisableAvailabilitySetNodes bool `json:"disableAvailabilitySetNodes,omitempty" yaml:"disableAvailabilitySetNodes,omitempty"`
// EnableVmssFlexNodes enables vmss flex nodes support when "VMType" is set to "vmss".
EnableVmssFlexNodes bool `json:"enableVmssFlexNodes,omitempty" yaml:"enableVmssFlexNodes,omitempty"`
// DisableAzureStackCloud disables AzureStackCloud support. It should be used
// when setting AzureAuthConfig.Cloud with "AZURESTACKCLOUD" to customize ARM endpoints
// while the cluster is not running on AzureStack.
DisableAzureStackCloud bool `json:"disableAzureStackCloud,omitempty" yaml:"disableAzureStackCloud,omitempty"`
// Enable exponential backoff to manage resource request retries
CloudProviderBackoff bool `json:"cloudProviderBackoff,omitempty" yaml:"cloudProviderBackoff,omitempty"`
// Use instance metadata service where possible
UseInstanceMetadata bool `json:"useInstanceMetadata,omitempty" yaml:"useInstanceMetadata,omitempty"`
// EnableMultipleStandardLoadBalancers determines the behavior of the standard load balancer. If set to true
// there would be one standard load balancer per VMAS or VMSS, which is similar with the behavior of the basic
// load balancer. Users could select the specific standard load balancer for their service by the service
// annotation `service.beta.kubernetes.io/azure-load-balancer-mode`, If set to false, the same standard load balancer
// would be shared by all services in the cluster. In this case, the mode selection annotation would be ignored.
EnableMultipleStandardLoadBalancers bool `json:"enableMultipleStandardLoadBalancers,omitempty" yaml:"enableMultipleStandardLoadBalancers,omitempty"`
// NodePoolsWithoutDedicatedSLB stores the VMAS/VMSS names that share the primary standard load balancer instead
// of having a dedicated one. This is useful only when EnableMultipleStandardLoadBalancers is set to true.
NodePoolsWithoutDedicatedSLB string `json:"nodePoolsWithoutDedicatedSLB,omitempty" yaml:"nodePoolsWithoutDedicatedSLB,omitempty"`
// Backoff exponent
CloudProviderBackoffExponent float64 `json:"cloudProviderBackoffExponent,omitempty" yaml:"cloudProviderBackoffExponent,omitempty"`
// Backoff jitter
CloudProviderBackoffJitter float64 `json:"cloudProviderBackoffJitter,omitempty" yaml:"cloudProviderBackoffJitter,omitempty"`
// ExcludeMasterFromStandardLB excludes master nodes from standard load balancer.
// If not set, it will be default to true.
ExcludeMasterFromStandardLB *bool `json:"excludeMasterFromStandardLB,omitempty" yaml:"excludeMasterFromStandardLB,omitempty"`
// DisableOutboundSNAT disables the outbound SNAT for public load balancer rules.
// It should only be set when loadBalancerSku is standard. If not set, it will be default to false.
DisableOutboundSNAT *bool `json:"disableOutboundSNAT,omitempty" yaml:"disableOutboundSNAT,omitempty"`
// Maximum allowed LoadBalancer Rule Count is the limit enforced by Azure Load balancer
MaximumLoadBalancerRuleCount int `json:"maximumLoadBalancerRuleCount,omitempty" yaml:"maximumLoadBalancerRuleCount,omitempty"`
// Backoff retry limit
CloudProviderBackoffRetries int `json:"cloudProviderBackoffRetries,omitempty" yaml:"cloudProviderBackoffRetries,omitempty"`
// Backoff duration
CloudProviderBackoffDuration int `json:"cloudProviderBackoffDuration,omitempty" yaml:"cloudProviderBackoffDuration,omitempty"`
// NonVmssUniformNodesCacheTTLInSeconds sets the Cache TTL for NonVmssUniformNodesCacheTTLInSeconds
// if not set, will use default value
NonVmssUniformNodesCacheTTLInSeconds int `json:"nonVmssUniformNodesCacheTTLInSeconds,omitempty" yaml:"nonVmssUniformNodesCacheTTLInSeconds,omitempty"`
// AvailabilitySetNodesCacheTTLInSeconds sets the Cache TTL for availabilitySetNodesCache
// if not set, will use default value
AvailabilitySetNodesCacheTTLInSeconds int `json:"availabilitySetNodesCacheTTLInSeconds,omitempty" yaml:"availabilitySetNodesCacheTTLInSeconds,omitempty"`
// VmssCacheTTLInSeconds sets the cache TTL for VMSS
VmssCacheTTLInSeconds int `json:"vmssCacheTTLInSeconds,omitempty" yaml:"vmssCacheTTLInSeconds,omitempty"`
// VmssVirtualMachinesCacheTTLInSeconds sets the cache TTL for vmssVirtualMachines
VmssVirtualMachinesCacheTTLInSeconds int `json:"vmssVirtualMachinesCacheTTLInSeconds,omitempty" yaml:"vmssVirtualMachinesCacheTTLInSeconds,omitempty"`
// VmssFlexCacheTTLInSeconds sets the cache TTL for VMSS Flex
VmssFlexCacheTTLInSeconds int `json:"vmssFlexCacheTTLInSeconds,omitempty" yaml:"vmssFlexCacheTTLInSeconds,omitempty"`
// VmssFlexVMCacheTTLInSeconds sets the cache TTL for vmss flex vms
VmssFlexVMCacheTTLInSeconds int `json:"vmssFlexVMCacheTTLInSeconds,omitempty" yaml:"vmssFlexVMCacheTTLInSeconds,omitempty"`
// VmCacheTTLInSeconds sets the cache TTL for vm
VMCacheTTLInSeconds int `json:"vmCacheTTLInSeconds,omitempty" yaml:"vmCacheTTLInSeconds,omitempty"`
// LoadBalancerCacheTTLInSeconds sets the cache TTL for load balancer
LoadBalancerCacheTTLInSeconds int `json:"loadBalancerCacheTTLInSeconds,omitempty" yaml:"loadBalancerCacheTTLInSeconds,omitempty"`
// NsgCacheTTLInSeconds sets the cache TTL for network security group
NsgCacheTTLInSeconds int `json:"nsgCacheTTLInSeconds,omitempty" yaml:"nsgCacheTTLInSeconds,omitempty"`
// RouteTableCacheTTLInSeconds sets the cache TTL for route table
RouteTableCacheTTLInSeconds int `json:"routeTableCacheTTLInSeconds,omitempty" yaml:"routeTableCacheTTLInSeconds,omitempty"`
// PlsCacheTTLInSeconds sets the cache TTL for private link service resource
PlsCacheTTLInSeconds int `json:"plsCacheTTLInSeconds,omitempty" yaml:"plsCacheTTLInSeconds,omitempty"`
// AvailabilitySetsCacheTTLInSeconds sets the cache TTL for VMAS
AvailabilitySetsCacheTTLInSeconds int `json:"availabilitySetsCacheTTLInSeconds,omitempty" yaml:"availabilitySetsCacheTTLInSeconds,omitempty"`
// PublicIPCacheTTLInSeconds sets the cache TTL for public ip
PublicIPCacheTTLInSeconds int `json:"publicIPCacheTTLInSeconds,omitempty" yaml:"publicIPCacheTTLInSeconds,omitempty"`
// RouteUpdateWaitingInSeconds is the delay time for waiting route updates to take effect. This waiting delay is added
// because the routes are not taken effect when the async route updating operation returns success. Default is 30 seconds.
RouteUpdateWaitingInSeconds int `json:"routeUpdateWaitingInSeconds,omitempty" yaml:"routeUpdateWaitingInSeconds,omitempty"`
// The user agent for Azure customer usage attribution
UserAgent string `json:"userAgent,omitempty" yaml:"userAgent,omitempty"`
// LoadBalancerBackendPoolConfigurationType defines how vms join the load balancer backend pools. Supported values
// are `nodeIPConfiguration`, `nodeIP` and `podIP`.
// `nodeIPConfiguration`: vm network interfaces will be attached to the inbound backend pool of the load balancer (default);
// `nodeIP`: vm private IPs will be attached to the inbound backend pool of the load balancer;
// `podIP`: pod IPs will be attached to the inbound backend pool of the load balancer (not supported yet).
LoadBalancerBackendPoolConfigurationType string `json:"loadBalancerBackendPoolConfigurationType,omitempty" yaml:"loadBalancerBackendPoolConfigurationType,omitempty"`
// PutVMSSVMBatchSize defines how many requests the client send concurrently when putting the VMSS VMs.
// If it is smaller than or equal to zero, the request will be sent one by one in sequence (default).
PutVMSSVMBatchSize int `json:"putVMSSVMBatchSize" yaml:"putVMSSVMBatchSize"`
// PrivateLinkServiceResourceGroup determines the specific resource group of the private link services user want to use
PrivateLinkServiceResourceGroup string `json:"privateLinkServiceResourceGroup,omitempty" yaml:"privateLinkServiceResourceGroup,omitempty"`
}
type InitSecretConfig struct {
SecretName string `json:"secretName,omitempty" yaml:"secretName,omitempty"`
SecretNamespace string `json:"secretNamespace,omitempty" yaml:"secretNamespace,omitempty"`
CloudConfigKey string `json:"cloudConfigKey,omitempty" yaml:"cloudConfigKey,omitempty"`
}
// HasExtendedLocation returns true if extendedlocation prop are specified.
func (config *Config) HasExtendedLocation() bool {
return config.ExtendedLocationName != "" && config.ExtendedLocationType != ""
}
var (
_ cloudprovider.Interface = (*Cloud)(nil)
_ cloudprovider.Instances = (*Cloud)(nil)
_ cloudprovider.LoadBalancer = (*Cloud)(nil)
_ cloudprovider.Routes = (*Cloud)(nil)
_ cloudprovider.Zones = (*Cloud)(nil)
_ cloudprovider.PVLabeler = (*Cloud)(nil)
)
// Cloud holds the config and clients
type Cloud struct {
Config
InitSecretConfig
Environment azure.Environment
RoutesClient routeclient.Interface
SubnetsClient subnetclient.Interface
InterfacesClient interfaceclient.Interface
RouteTablesClient routetableclient.Interface
LoadBalancerClient loadbalancerclient.Interface
PublicIPAddressesClient publicipclient.Interface
SecurityGroupsClient securitygroupclient.Interface
VirtualMachinesClient vmclient.Interface
StorageAccountClient storageaccountclient.Interface
DisksClient diskclient.Interface
SnapshotsClient snapshotclient.Interface
FileClient fileclient.Interface
BlobClient blobclient.Interface
VirtualMachineScaleSetsClient vmssclient.Interface
VirtualMachineScaleSetVMsClient vmssvmclient.Interface
VirtualMachineSizesClient vmsizeclient.Interface
AvailabilitySetsClient vmasclient.Interface
ZoneClient zoneclient.Interface
privateendpointclient privateendpointclient.Interface
privatednsclient privatednsclient.Interface
privatednszonegroupclient privatednszonegroupclient.Interface
virtualNetworkLinksClient virtualnetworklinksclient.Interface
PrivateLinkServiceClient privatelinkserviceclient.Interface
containerServiceClient containerserviceclient.Interface
deploymentClient deploymentclient.Interface
ResourceRequestBackoff wait.Backoff
Metadata *InstanceMetadataService
VMSet VMSet
LoadBalancerBackendPool BackendPool
// ipv6DualStack allows overriding for unit testing. It's normally initialized from featuregates
ipv6DualStackEnabled bool
// isSHaredLoadBalancerSynced indicates if the reconcileSharedLoadBalancer has been run
isSharedLoadBalancerSynced bool
// Lock for access to node caches, includes nodeZones, nodeResourceGroups, and unmanagedNodes.
nodeCachesLock sync.RWMutex
// nodeNames holds current nodes for tracking added nodes in VM caches.
nodeNames sets.Set[string]
// nodeZones is a mapping from Zone to a sets.Set[string] of Node's names in the Zone
// it is updated by the nodeInformer
nodeZones map[string]sets.Set[string]
// nodeResourceGroups holds nodes external resource groups
nodeResourceGroups map[string]string
// unmanagedNodes holds a list of nodes not managed by Azure cloud provider.
unmanagedNodes sets.Set[string]
// excludeLoadBalancerNodes holds a list of nodes that should be excluded from LoadBalancer.
excludeLoadBalancerNodes sets.Set[string]
nodePrivateIPs map[string]sets.Set[string]
// nodeInformerSynced is for determining if the informer has synced.
nodeInformerSynced cache.InformerSynced
// routeCIDRsLock holds lock for routeCIDRs cache.
routeCIDRsLock sync.Mutex
// routeCIDRs holds cache for route CIDRs.
routeCIDRs map[string]string
// regionZonesMap stores all available zones for the subscription by region
regionZonesMap map[string][]string
refreshZonesLock sync.RWMutex
KubeClient clientset.Interface
eventBroadcaster record.EventBroadcaster
eventRecorder record.EventRecorder
routeUpdater *delayedRouteUpdater
vmCache *azcache.TimedCache
lbCache *azcache.TimedCache
nsgCache *azcache.TimedCache
rtCache *azcache.TimedCache
// public ip cache
// key: [resourceGroupName]
// Value: sync.Map of [pipName]*PublicIPAddress
pipCache *azcache.TimedCache
// use LB frontEndIpConfiguration ID as the key and search for PLS attached to the frontEnd
plsCache *azcache.TimedCache
// Add service lister to always get latest service
serviceLister corelisters.ServiceLister
// node-sync-loop routine and service-reconcile routine should not update LoadBalancer at the same time
serviceReconcileLock sync.Mutex
*ManagedDiskController
*controllerCommon
}
// NewCloud returns a Cloud with initialized clients
func NewCloud(ctx context.Context, configReader io.Reader, callFromCCM bool) (cloudprovider.Interface, error) {
az, err := NewCloudWithoutFeatureGates(ctx, configReader, callFromCCM)
if err != nil {
return nil, err
}
az.ipv6DualStackEnabled = true
return az, nil
}
func NewCloudFromConfigFile(ctx context.Context, configFilePath string, calFromCCM bool) (cloudprovider.Interface, error) {
var (
cloud cloudprovider.Interface
err error
)
if configFilePath != "" {
var config *os.File
config, err = os.Open(configFilePath)
if err != nil {
klog.Fatalf("Couldn't open cloud provider configuration %s: %#v",
configFilePath, err)
}
defer config.Close()
cloud, err = NewCloud(ctx, config, calFromCCM)
} else {
// Pass explicit nil so plugins can actually check for nil. See
// "Why is my nil error value not equal to nil?" in golang.org/doc/faq.
cloud, err = NewCloud(ctx, nil, false)
}
if err != nil {
return nil, fmt.Errorf("could not init cloud provider azure: %w", err)
}
if cloud == nil {
return nil, fmt.Errorf("nil cloud")
}
return cloud, nil
}
func (az *Cloud) configSecretMetadata(secretName, secretNamespace, cloudConfigKey string) {
if secretName == "" {
secretName = consts.DefaultCloudProviderConfigSecName
}
if secretNamespace == "" {
secretNamespace = consts.DefaultCloudProviderConfigSecNamespace
}
if cloudConfigKey == "" {
cloudConfigKey = consts.DefaultCloudProviderConfigSecKey
}
az.InitSecretConfig = InitSecretConfig{
SecretName: secretName,
SecretNamespace: secretNamespace,
CloudConfigKey: cloudConfigKey,
}
}
func NewCloudFromSecret(ctx context.Context, clientBuilder cloudprovider.ControllerClientBuilder, secretName, secretNamespace, cloudConfigKey string) (cloudprovider.Interface, error) {
az := &Cloud{
nodeNames: sets.New[string](),
nodeZones: map[string]sets.Set[string]{},
nodeResourceGroups: map[string]string{},
unmanagedNodes: sets.New[string](),
routeCIDRs: map[string]string{},
excludeLoadBalancerNodes: sets.New[string](),
nodePrivateIPs: map[string]sets.Set[string]{},
}
az.configSecretMetadata(secretName, secretNamespace, cloudConfigKey)
az.Initialize(clientBuilder, wait.NeverStop)
err := az.InitializeCloudFromSecret(ctx)
if err != nil {
return nil, fmt.Errorf("NewCloudFromSecret: failed to initialize cloud from secret %s/%s: %w", az.SecretNamespace, az.SecretName, err)
}
az.ipv6DualStackEnabled = true
return az, nil
}
// NewCloudWithoutFeatureGates returns a Cloud without trying to wire the feature gates. This is used by the unit tests
// that don't load the actual features being used in the cluster.
func NewCloudWithoutFeatureGates(ctx context.Context, configReader io.Reader, callFromCCM bool) (*Cloud, error) {
config, err := ParseConfig(configReader)
if err != nil {
return nil, err
}
az := &Cloud{
nodeNames: sets.New[string](),
nodeZones: map[string]sets.Set[string]{},
nodeResourceGroups: map[string]string{},
unmanagedNodes: sets.New[string](),
routeCIDRs: map[string]string{},
excludeLoadBalancerNodes: sets.New[string](),
nodePrivateIPs: map[string]sets.Set[string]{},
}
err = az.InitializeCloudFromConfig(ctx, config, false, callFromCCM)
if err != nil {
return nil, err
}
return az, nil
}
// InitializeCloudFromConfig initializes the Cloud from config.
func (az *Cloud) InitializeCloudFromConfig(ctx context.Context, config *Config, fromSecret, callFromCCM bool) error {
if config == nil {
// should not reach here
return fmt.Errorf("InitializeCloudFromConfig: cannot initialize from nil config")
}
if config.RouteTableResourceGroup == "" {
config.RouteTableResourceGroup = config.ResourceGroup
}
if config.SecurityGroupResourceGroup == "" {
config.SecurityGroupResourceGroup = config.ResourceGroup
}
if config.PrivateLinkServiceResourceGroup == "" {
config.PrivateLinkServiceResourceGroup = config.ResourceGroup
}
if config.VMType == "" {
// default to standard vmType if not set.
config.VMType = consts.VMTypeStandard
}
if config.RouteUpdateWaitingInSeconds <= 0 {
config.RouteUpdateWaitingInSeconds = defaultRouteUpdateWaitingInSeconds
}
if config.DisableAvailabilitySetNodes && config.VMType != consts.VMTypeVMSS {
return fmt.Errorf("disableAvailabilitySetNodes %v is only supported when vmType is 'vmss'", config.DisableAvailabilitySetNodes)
}
if config.CloudConfigType == "" {
// The default cloud config type is cloudConfigTypeMerge.
config.CloudConfigType = cloudConfigTypeMerge
} else {
supportedCloudConfigTypes := sets.New(
string(cloudConfigTypeMerge),
string(cloudConfigTypeFile),
string(cloudConfigTypeSecret))
if !supportedCloudConfigTypes.Has(string(config.CloudConfigType)) {
return fmt.Errorf("cloudConfigType %v is not supported, supported values are %v", config.CloudConfigType, supportedCloudConfigTypes.UnsortedList())
}
}
if config.LoadBalancerBackendPoolConfigurationType == "" ||
// TODO(nilo19): support pod IP mode in the future
strings.EqualFold(config.LoadBalancerBackendPoolConfigurationType, consts.LoadBalancerBackendPoolConfigurationTypePODIP) {
config.LoadBalancerBackendPoolConfigurationType = consts.LoadBalancerBackendPoolConfigurationTypeNodeIPConfiguration
} else {
supportedLoadBalancerBackendPoolConfigurationTypes := sets.New(
strings.ToLower(consts.LoadBalancerBackendPoolConfigurationTypeNodeIPConfiguration),
strings.ToLower(consts.LoadBalancerBackendPoolConfigurationTypeNodeIP),
strings.ToLower(consts.LoadBalancerBackendPoolConfigurationTypePODIP))
if !supportedLoadBalancerBackendPoolConfigurationTypes.Has(strings.ToLower(config.LoadBalancerBackendPoolConfigurationType)) {
return fmt.Errorf("loadBalancerBackendPoolConfigurationType %s is not supported, supported values are %v", config.LoadBalancerBackendPoolConfigurationType, supportedLoadBalancerBackendPoolConfigurationTypes.UnsortedList())
}
}
env, err := ratelimitconfig.ParseAzureEnvironment(config.Cloud, config.ResourceManagerEndpoint, config.IdentitySystem)
if err != nil {
return err
}
servicePrincipalToken, err := ratelimitconfig.GetServicePrincipalToken(&config.AzureAuthConfig, env, env.ServiceManagementEndpoint)
if errors.Is(err, ratelimitconfig.ErrorNoAuth) {
// Only controller-manager would lazy-initialize from secret, and credentials are required for such case.
if fromSecret {
err := fmt.Errorf("no credentials provided for Azure cloud provider")
klog.Fatal(err)
return err
}
// No credentials provided, useInstanceMetadata should be enabled for Kubelet.
// TODO(feiskyer): print different error message for Kubelet and controller-manager, as they're
// requiring different credential settings.
if !config.UseInstanceMetadata && config.CloudConfigType == cloudConfigTypeFile {
return fmt.Errorf("useInstanceMetadata must be enabled without Azure credentials")
}
klog.V(2).Infof("Azure cloud provider is starting without credentials")
} else if err != nil {
return err
}
// Initialize rate limiting config options.
ratelimitconfig.InitializeCloudProviderRateLimitConfig(&config.CloudProviderRateLimitConfig)
resourceRequestBackoff := az.setCloudProviderBackoffDefaults(config)
err = az.setLBDefaults(config)
if err != nil {
return err
}
az.Config = *config
az.Environment = *env
az.ResourceRequestBackoff = resourceRequestBackoff
az.Metadata, err = NewInstanceMetadataService(consts.ImdsServer)
if err != nil {
return err
}
// No credentials provided, InstanceMetadataService would be used for getting Azure resources.
// Note that this only applies to Kubelet, controller-manager should configure credentials for managing Azure resources.
if servicePrincipalToken == nil {
return nil
}
// If uses network resources in different AAD Tenant, then prepare corresponding Service Principal Token for VM/VMSS client and network resources client
err = az.configureMultiTenantClients(servicePrincipalToken)
if err != nil {
return err
}
if az.MaximumLoadBalancerRuleCount == 0 {
az.MaximumLoadBalancerRuleCount = consts.MaximumLoadBalancerRuleCount
}
if strings.EqualFold(consts.VMTypeVMSS, az.Config.VMType) {
az.VMSet, err = newScaleSet(ctx, az)
if err != nil {
return err
}
} else if strings.EqualFold(consts.VMTypeVmssFlex, az.Config.VMType) {
az.VMSet, err = newFlexScaleSet(ctx, az)
if err != nil {
return err
}
} else {
az.VMSet, err = newAvailabilitySet(az)
if err != nil {
return err
}
}
if az.isLBBackendPoolTypeNodeIPConfig() {
az.LoadBalancerBackendPool = newBackendPoolTypeNodeIPConfig(az)
} else if az.isLBBackendPoolTypeNodeIP() {
az.LoadBalancerBackendPool = newBackendPoolTypeNodeIP(az)
}
err = az.initCaches()
if err != nil {
return err
}
if err := initDiskControllers(az); err != nil {
return err
}
// updating routes and syncing zones only in CCM
if callFromCCM {
// start delayed route updater.
az.routeUpdater = newDelayedRouteUpdater(az, routeUpdateInterval)
go az.routeUpdater.run()
// Azure Stack does not support zone at the moment
// https://docs.microsoft.com/en-us/azure-stack/user/azure-stack-network-differences?view=azs-2102
if !az.isStackCloud() {
// wait for the success first time of syncing zones
err = az.syncRegionZonesMap()
if err != nil {
klog.Errorf("InitializeCloudFromConfig: failed to sync regional zones map for the first time: %s", err.Error())
return err
}
go az.refreshZones(az.syncRegionZonesMap)
}
}
return nil
}
func (az *Cloud) isLBBackendPoolTypeNodeIPConfig() bool {
return strings.EqualFold(az.LoadBalancerBackendPoolConfigurationType, consts.LoadBalancerBackendPoolConfigurationTypeNodeIPConfiguration)
}
func (az *Cloud) isLBBackendPoolTypeNodeIP() bool {
return strings.EqualFold(az.LoadBalancerBackendPoolConfigurationType, consts.LoadBalancerBackendPoolConfigurationTypeNodeIP)
}
func (az *Cloud) getPutVMSSVMBatchSize() int {
return az.PutVMSSVMBatchSize
}
func (az *Cloud) initCaches() (err error) {
az.vmCache, err = az.newVMCache()
if err != nil {
return err
}
az.lbCache, err = az.newLBCache()
if err != nil {
return err
}
az.nsgCache, err = az.newNSGCache()
if err != nil {
return err
}
az.rtCache, err = az.newRouteTableCache()
if err != nil {
return err
}
az.pipCache, err = az.newPIPCache()
if err != nil {
return err
}
az.plsCache, err = az.newPLSCache()
if err != nil {
return err
}
return nil
}
func (az *Cloud) setLBDefaults(config *Config) error {
if strings.EqualFold(config.LoadBalancerSku, consts.LoadBalancerSkuStandard) {
// Do not add master nodes to standard LB by default.
if config.ExcludeMasterFromStandardLB == nil {
config.ExcludeMasterFromStandardLB = &defaultExcludeMasterFromStandardLB
}
// Enable outbound SNAT by default.
if config.DisableOutboundSNAT == nil {
config.DisableOutboundSNAT = &defaultDisableOutboundSNAT
}
} else {
if config.DisableOutboundSNAT != nil && *config.DisableOutboundSNAT {
return fmt.Errorf("disableOutboundSNAT should only set when loadBalancerSku is standard")
}
}
return nil
}
func (az *Cloud) configureMultiTenantClients(servicePrincipalToken *adal.ServicePrincipalToken) error {
var err error
var multiTenantServicePrincipalToken *adal.MultiTenantServicePrincipalToken
var networkResourceServicePrincipalToken *adal.ServicePrincipalToken
if az.Config.UsesNetworkResourceInDifferentTenant() {
multiTenantServicePrincipalToken, err = ratelimitconfig.GetMultiTenantServicePrincipalToken(&az.Config.AzureAuthConfig, &az.Environment)
if err != nil {
return err
}
networkResourceServicePrincipalToken, err = ratelimitconfig.GetNetworkResourceServicePrincipalToken(&az.Config.AzureAuthConfig, &az.Environment)
if err != nil {
return err
}
}
az.configAzureClients(servicePrincipalToken, multiTenantServicePrincipalToken, networkResourceServicePrincipalToken)
return nil
}
func (az *Cloud) setCloudProviderBackoffDefaults(config *Config) wait.Backoff {
// Conditionally configure resource request backoff
resourceRequestBackoff := wait.Backoff{
Steps: 1,
}
if config.CloudProviderBackoff {
// Assign backoff defaults if no configuration was passed in
if config.CloudProviderBackoffRetries == 0 {
config.CloudProviderBackoffRetries = consts.BackoffRetriesDefault
}
if config.CloudProviderBackoffDuration == 0 {
config.CloudProviderBackoffDuration = consts.BackoffDurationDefault
}
if config.CloudProviderBackoffExponent == 0 {
config.CloudProviderBackoffExponent = consts.BackoffExponentDefault
}
if config.CloudProviderBackoffJitter == 0 {
config.CloudProviderBackoffJitter = consts.BackoffJitterDefault
}
resourceRequestBackoff = wait.Backoff{
Steps: config.CloudProviderBackoffRetries,
Factor: config.CloudProviderBackoffExponent,
Duration: time.Duration(config.CloudProviderBackoffDuration) * time.Second,
Jitter: config.CloudProviderBackoffJitter,
}
klog.V(2).Infof("Azure cloudprovider using try backoff: retries=%d, exponent=%f, duration=%d, jitter=%f",
config.CloudProviderBackoffRetries,
config.CloudProviderBackoffExponent,
config.CloudProviderBackoffDuration,
config.CloudProviderBackoffJitter)
} else {
// CloudProviderBackoffRetries will be set to 1 by default as the requirements of Azure SDK.
config.CloudProviderBackoffRetries = 1
config.CloudProviderBackoffDuration = consts.BackoffDurationDefault
}
return resourceRequestBackoff
}
func (az *Cloud) configAzureClients(
servicePrincipalToken *adal.ServicePrincipalToken,
multiTenantServicePrincipalToken *adal.MultiTenantServicePrincipalToken,
networkResourceServicePrincipalToken *adal.ServicePrincipalToken) {
azClientConfig := az.getAzureClientConfig(servicePrincipalToken)
// Prepare AzureClientConfig for all azure clients
interfaceClientConfig := azClientConfig.WithRateLimiter(az.Config.InterfaceRateLimit)
vmSizeClientConfig := azClientConfig.WithRateLimiter(az.Config.VirtualMachineSizeRateLimit)
snapshotClientConfig := azClientConfig.WithRateLimiter(az.Config.SnapshotRateLimit)
storageAccountClientConfig := azClientConfig.WithRateLimiter(az.Config.StorageAccountRateLimit)
diskClientConfig := azClientConfig.WithRateLimiter(az.Config.DiskRateLimit)
vmClientConfig := azClientConfig.WithRateLimiter(az.Config.VirtualMachineRateLimit)
vmssClientConfig := azClientConfig.WithRateLimiter(az.Config.VirtualMachineScaleSetRateLimit)
// Error "not an active Virtual Machine Scale Set VM" is not retriable for VMSS VM.
// But http.StatusNotFound is retriable because of ARM replication latency.
vmssVMClientConfig := azClientConfig.WithRateLimiter(az.Config.VirtualMachineScaleSetRateLimit)
vmssVMClientConfig.Backoff = vmssVMClientConfig.Backoff.WithNonRetriableErrors([]string{consts.VmssVMNotActiveErrorMessage}).WithRetriableHTTPStatusCodes([]int{http.StatusNotFound})
routeClientConfig := azClientConfig.WithRateLimiter(az.Config.RouteRateLimit)
subnetClientConfig := azClientConfig.WithRateLimiter(az.Config.SubnetsRateLimit)
routeTableClientConfig := azClientConfig.WithRateLimiter(az.Config.RouteTableRateLimit)
loadBalancerClientConfig := azClientConfig.WithRateLimiter(az.Config.LoadBalancerRateLimit)
securityGroupClientConfig := azClientConfig.WithRateLimiter(az.Config.SecurityGroupRateLimit)
publicIPClientConfig := azClientConfig.WithRateLimiter(az.Config.PublicIPAddressRateLimit)
containerServiceConfig := azClientConfig.WithRateLimiter(az.Config.ContainerServiceRateLimit)
deploymentConfig := azClientConfig.WithRateLimiter(az.Config.DeploymentRateLimit)
privateDNSConfig := azClientConfig.WithRateLimiter(az.Config.PrivateDNSRateLimit)
privateDNSZoenGroupConfig := azClientConfig.WithRateLimiter(az.Config.PrivateDNSZoneGroupRateLimit)
privateEndpointConfig := azClientConfig.WithRateLimiter(az.Config.PrivateEndpointRateLimit)
privateLinkServiceConfig := azClientConfig.WithRateLimiter(az.Config.PrivateLinkServiceRateLimit)
virtualNetworkConfig := azClientConfig.WithRateLimiter(az.Config.VirtualNetworkRateLimit)
// TODO(ZeroMagic): add azurefileRateLimit
fileClientConfig := azClientConfig.WithRateLimiter(nil)
blobClientConfig := azClientConfig.WithRateLimiter(nil)
vmasClientConfig := azClientConfig.WithRateLimiter(az.Config.AvailabilitySetRateLimit)
zoneClientConfig := azClientConfig.WithRateLimiter(nil)
// If uses network resources in different AAD Tenant, update Authorizer for VM/VMSS/VMAS client config
if multiTenantServicePrincipalToken != nil {
multiTenantServicePrincipalTokenAuthorizer := autorest.NewMultiTenantServicePrincipalTokenAuthorizer(multiTenantServicePrincipalToken)
vmClientConfig.Authorizer = multiTenantServicePrincipalTokenAuthorizer
vmssClientConfig.Authorizer = multiTenantServicePrincipalTokenAuthorizer
vmssVMClientConfig.Authorizer = multiTenantServicePrincipalTokenAuthorizer
vmasClientConfig.Authorizer = multiTenantServicePrincipalTokenAuthorizer
}
// If uses network resources in different AAD Tenant, update SubscriptionID and Authorizer for network resources client config
if networkResourceServicePrincipalToken != nil {
networkResourceServicePrincipalTokenAuthorizer := autorest.NewBearerAuthorizer(networkResourceServicePrincipalToken)
routeClientConfig.Authorizer = networkResourceServicePrincipalTokenAuthorizer
subnetClientConfig.Authorizer = networkResourceServicePrincipalTokenAuthorizer
routeTableClientConfig.Authorizer = networkResourceServicePrincipalTokenAuthorizer
loadBalancerClientConfig.Authorizer = networkResourceServicePrincipalTokenAuthorizer
securityGroupClientConfig.Authorizer = networkResourceServicePrincipalTokenAuthorizer
publicIPClientConfig.Authorizer = networkResourceServicePrincipalTokenAuthorizer
}
if az.UsesNetworkResourceInDifferentSubscription() {
routeClientConfig.SubscriptionID = az.Config.NetworkResourceSubscriptionID
subnetClientConfig.SubscriptionID = az.Config.NetworkResourceSubscriptionID
routeTableClientConfig.SubscriptionID = az.Config.NetworkResourceSubscriptionID
loadBalancerClientConfig.SubscriptionID = az.Config.NetworkResourceSubscriptionID
securityGroupClientConfig.SubscriptionID = az.Config.NetworkResourceSubscriptionID
publicIPClientConfig.SubscriptionID = az.Config.NetworkResourceSubscriptionID
}
// Initialize all azure clients based on client config
az.InterfacesClient = interfaceclient.New(interfaceClientConfig)
az.VirtualMachineSizesClient = vmsizeclient.New(vmSizeClientConfig)
az.SnapshotsClient = snapshotclient.New(snapshotClientConfig)
az.StorageAccountClient = storageaccountclient.New(storageAccountClientConfig)
az.DisksClient = diskclient.New(diskClientConfig)
az.VirtualMachinesClient = vmclient.New(vmClientConfig)
az.VirtualMachineScaleSetsClient = vmssclient.New(vmssClientConfig)
az.VirtualMachineScaleSetVMsClient = vmssvmclient.New(vmssVMClientConfig)
az.RoutesClient = routeclient.New(routeClientConfig)
az.SubnetsClient = subnetclient.New(subnetClientConfig)
az.RouteTablesClient = routetableclient.New(routeTableClientConfig)
az.LoadBalancerClient = loadbalancerclient.New(loadBalancerClientConfig)
az.SecurityGroupsClient = securitygroupclient.New(securityGroupClientConfig)
az.PublicIPAddressesClient = publicipclient.New(publicIPClientConfig)
az.FileClient = fileclient.New(fileClientConfig)
az.BlobClient = blobclient.New(blobClientConfig)
az.AvailabilitySetsClient = vmasclient.New(vmasClientConfig)
az.privateendpointclient = privateendpointclient.New(privateEndpointConfig)
az.privatednsclient = privatednsclient.New(privateDNSConfig)
az.privatednszonegroupclient = privatednszonegroupclient.New(privateDNSZoenGroupConfig)
az.virtualNetworkLinksClient = virtualnetworklinksclient.New(virtualNetworkConfig)
az.PrivateLinkServiceClient = privatelinkserviceclient.New(privateLinkServiceConfig)
az.containerServiceClient = containerserviceclient.New(containerServiceConfig)
az.deploymentClient = deploymentclient.New(deploymentConfig)
if az.ZoneClient == nil {
az.ZoneClient = zoneclient.New(zoneClientConfig)
}
}
func (az *Cloud) getAzureClientConfig(servicePrincipalToken *adal.ServicePrincipalToken) *azclients.ClientConfig {
azClientConfig := &azclients.ClientConfig{
CloudName: az.Config.Cloud,
Location: az.Config.Location,
SubscriptionID: az.Config.SubscriptionID,
ResourceManagerEndpoint: az.Environment.ResourceManagerEndpoint,
Authorizer: autorest.NewBearerAuthorizer(servicePrincipalToken),
Backoff: &retry.Backoff{Steps: 1},
DisableAzureStackCloud: az.Config.DisableAzureStackCloud,
UserAgent: az.Config.UserAgent,
}
if az.Config.CloudProviderBackoff {
azClientConfig.Backoff = &retry.Backoff{
Steps: az.Config.CloudProviderBackoffRetries,
Factor: az.Config.CloudProviderBackoffExponent,
Duration: time.Duration(az.Config.CloudProviderBackoffDuration) * time.Second,
Jitter: az.Config.CloudProviderBackoffJitter,
}
}
if az.Config.HasExtendedLocation() {
azClientConfig.ExtendedLocation = &azclients.ExtendedLocation{
Name: az.Config.ExtendedLocationName,
Type: az.Config.ExtendedLocationType,
}
}
return azClientConfig
}
// ParseConfig returns a parsed configuration for an Azure cloudprovider config file
func ParseConfig(configReader io.Reader) (*Config, error) {
var config Config
if configReader == nil {
return nil, nil
}
configContents, err := io.ReadAll(configReader)
if err != nil {
return nil, err
}
err = yaml.Unmarshal(configContents, &config)
if err != nil {
return nil, err
}
// The resource group name may be in different cases from different Azure APIs, hence it is converted to lower here.
// See more context at https://github.com/kubernetes/kubernetes/issues/71994.
config.ResourceGroup = strings.ToLower(config.ResourceGroup)
return &config, nil
}
func (az *Cloud) isStackCloud() bool {
return strings.EqualFold(az.Config.Cloud, consts.AzureStackCloudName) && !az.Config.DisableAzureStackCloud
}
// Initialize passes a Kubernetes clientBuilder interface to the cloud provider
func (az *Cloud) Initialize(clientBuilder cloudprovider.ControllerClientBuilder, stop <-chan struct{}) {
az.KubeClient = clientBuilder.ClientOrDie("azure-cloud-provider")
az.eventBroadcaster = record.NewBroadcaster()
az.eventBroadcaster.StartRecordingToSink(&v1core.EventSinkImpl{Interface: az.KubeClient.CoreV1().Events("")})
az.eventRecorder = az.eventBroadcaster.NewRecorder(scheme.Scheme, v1.EventSource{Component: "azure-cloud-provider"})
}
// LoadBalancer returns a balancer interface. Also returns true if the interface is supported, false otherwise.
func (az *Cloud) LoadBalancer() (cloudprovider.LoadBalancer, bool) {
return az, true
}
// Instances returns an instances interface. Also returns true if the interface is supported, false otherwise.
func (az *Cloud) Instances() (cloudprovider.Instances, bool) {
return az, true
}
// InstancesV2 returns an instancesV2 interface. Also returns true if the interface is supported, false otherwise.
func (az *Cloud) InstancesV2() (cloudprovider.InstancesV2, bool) {
return az, true
}
// Zones returns a zones interface. Also returns true if the interface is supported, false otherwise.
func (az *Cloud) Zones() (cloudprovider.Zones, bool) {
if az.isStackCloud() {
// Azure stack does not support zones at this point
// https://docs.microsoft.com/en-us/azure-stack/user/azure-stack-network-differences?view=azs-2102
return nil, false
}
return az, true
}
// Clusters returns a clusters interface. Also returns true if the interface is supported, false otherwise.
func (az *Cloud) Clusters() (cloudprovider.Clusters, bool) {
return nil, false
}
// Routes returns a routes interface along with whether the interface is supported.
func (az *Cloud) Routes() (cloudprovider.Routes, bool) {
return az, true
}
// HasClusterID returns true if the cluster has a clusterID
func (az *Cloud) HasClusterID() bool {
return true
}
// ProviderName returns the cloud provider ID.
func (az *Cloud) ProviderName() string {
return consts.CloudProviderName
}
func initDiskControllers(az *Cloud) error {
// Common controller contains the function
// needed by both blob disk and managed disk controllers
qps := float32(ratelimitconfig.DefaultAtachDetachDiskQPS)
bucket := ratelimitconfig.DefaultAtachDetachDiskBucket
if az.Config.AttachDetachDiskRateLimit != nil {