auth

Documentation

Overview

Package auth provides a general libraty to authorize Azure ARM clients.

Index

• Constants
• Variables
• func GetMultiTenantServicePrincipalToken(config *AzureAuthConfig, env *azure.Environment) (*adal.MultiTenantServicePrincipalToken, error)
• func GetNetworkResourceServicePrincipalToken(config *AzureAuthConfig, env *azure.Environment) (*adal.ServicePrincipalToken, error)
• func GetServicePrincipalToken(config *AzureAuthConfig, env *azure.Environment) (*adal.ServicePrincipalToken, error)
• func ParseAzureEnvironment(cloudName, resourceManagerEndpoint, identitySystem string) (*azure.Environment, error)
• type AzureAuthConfig
  • func (config *AzureAuthConfig) UsesNetworkResourceInDifferentTenant() bool

Constants

const (
	// ADFSIdentitySystem is the override value for tenantID on Azure Stack clouds.
	ADFSIdentitySystem = "adfs"
)

Variables

var (
	// ErrorNoAuth indicates that no credentials are provided.
	ErrorNoAuth = fmt.Errorf("no credentials provided for Azure cloud provider")
)

Functions

func GetMultiTenantServicePrincipalToken

func GetMultiTenantServicePrincipalToken(config *AzureAuthConfig, env *azure.Environment) (*adal.MultiTenantServicePrincipalToken, error)

GetMultiTenantServicePrincipalToken is used when (and only when) NetworkResourceTenantID and NetworkResourceSubscriptionID are specified to have different values than TenantID and SubscriptionID.

In that scenario, network resources are deployed in different AAD Tenant and Subscription than those for the cluster, and this method creates a new multi-tenant service principal token based on the configuration.

PrimaryToken of the returned multi-tenant token is for the AAD Tenant specified by TenantID, and AuxiliaryToken of the returned multi-tenant token is for the AAD Tenant specified by NetworkResourceTenantID.

Azure VM/VMSS clients use this multi-tenant token, in order to operate those VM/VMSS in AAD Tenant specified by TenantID, and meanwhile in their payload they are referencing network resources (e.g. Load Balancer, Network Security Group, etc.) in AAD Tenant specified by NetworkResourceTenantID.

func GetNetworkResourceServicePrincipalToken

func GetNetworkResourceServicePrincipalToken(config *AzureAuthConfig, env *azure.Environment) (*adal.ServicePrincipalToken, error)

GetNetworkResourceServicePrincipalToken is used when (and only when) NetworkResourceTenantID and NetworkResourceSubscriptionID are specified to have different values than TenantID and SubscriptionID.

In that scenario, network resources are deployed in different AAD Tenant and Subscription than those for the cluster, and this method creates a new service principal token for network resources tenant based on the configuration.

Azure network resource (Load Balancer, Public IP, Route Table, Network Security Group and their sub level resources) clients use this multi-tenant token, in order to operate resources in AAD Tenant specified by NetworkResourceTenantID.

func GetServicePrincipalToken

func GetServicePrincipalToken(config *AzureAuthConfig, env *azure.Environment) (*adal.ServicePrincipalToken, error)

GetServicePrincipalToken creates a new service principal token based on the configuration.

By default, the cluster and its network resources are deployed in the same AAD Tenant and Subscription, and all azure clients use this method to fetch Service Principal Token.

If NetworkResourceTenantID and NetworkResourceSubscriptionID are specified to have different values than TenantID and SubscriptionID, network resources are deployed in different AAD Tenant and Subscription than those for the cluster, than only azure clients except VM/VMSS and network resource ones use this method to fetch Token. For tokens for VM/VMSS and network resource ones, please check GetMultiTenantServicePrincipalToken and GetNetworkResourceServicePrincipalToken.

func ParseAzureEnvironment

func ParseAzureEnvironment(cloudName, resourceManagerEndpoint, identitySystem string) (*azure.Environment, error)

ParseAzureEnvironment returns the azure environment. If 'resourceManagerEndpoint' is set, the environment is computed by quering the cloud's resource manager endpoint. Otherwise, a pre-defined Environment is looked up by name.

Types

type AzureAuthConfig

type AzureAuthConfig struct {
	// The cloud environment identifier. Takes values from https://github.com/Azure/go-autorest/blob/ec5f4903f77ed9927ac95b19ab8e44ada64c1356/autorest/azure/environments.go#L13
	Cloud string `json:"cloud,omitempty" yaml:"cloud,omitempty"`
	// The AAD Tenant ID for the Subscription that the cluster is deployed in
	TenantID string `json:"tenantId,omitempty" yaml:"tenantId,omitempty"`
	// The ClientID for an AAD application with RBAC access to talk to Azure RM APIs
	AADClientID string `json:"aadClientId,omitempty" yaml:"aadClientId,omitempty"`
	// The ClientSecret for an AAD application with RBAC access to talk to Azure RM APIs
	AADClientSecret string `json:"aadClientSecret,omitempty" yaml:"aadClientSecret,omitempty"`
	// The path of a client certificate for an AAD application with RBAC access to talk to Azure RM APIs
	AADClientCertPath string `json:"aadClientCertPath,omitempty" yaml:"aadClientCertPath,omitempty"`
	// The password of the client certificate for an AAD application with RBAC access to talk to Azure RM APIs
	AADClientCertPassword string `json:"aadClientCertPassword,omitempty" yaml:"aadClientCertPassword,omitempty"`
	// Use managed service identity for the virtual machine to access Azure ARM APIs
	UseManagedIdentityExtension bool `json:"useManagedIdentityExtension,omitempty" yaml:"useManagedIdentityExtension,omitempty"`
	// UserAssignedIdentityID contains the Client ID of the user assigned MSI which is assigned to the underlying VMs. If empty the user assigned identity is not used.
	// More details of the user assigned identity can be found at: https://docs.microsoft.com/en-us/azure/active-directory/managed-service-identity/overview
	// For the user assigned identity specified here to be used, the UseManagedIdentityExtension has to be set to true.
	UserAssignedIdentityID string `json:"userAssignedIdentityID,omitempty" yaml:"userAssignedIdentityID,omitempty"`
	// The ID of the Azure Subscription that the cluster is deployed in
	SubscriptionID string `json:"subscriptionId,omitempty" yaml:"subscriptionId,omitempty"`
	// IdentitySystem indicates the identity provider. Relevant only to hybrid clouds (Azure Stack).
	// Allowed values are 'azure_ad' (default), 'adfs'.
	IdentitySystem string `json:"identitySystem,omitempty" yaml:"identitySystem,omitempty"`
	// ResourceManagerEndpoint is the cloud's resource manager endpoint. If set, cloud provider queries this endpoint
	// in order to generate an autorest.Environment instance instead of using one of the pre-defined Environments.
	ResourceManagerEndpoint string `json:"resourceManagerEndpoint,omitempty" yaml:"resourceManagerEndpoint,omitempty"`
	// The AAD Tenant ID for the Subscription that the network resources are deployed in
	NetworkResourceTenantID string `json:"networkResourceTenantID,omitempty" yaml:"networkResourceTenantID,omitempty"`
	// The ID of the Azure Subscription that the network resources are deployed in
	NetworkResourceSubscriptionID string `json:"networkResourceSubscriptionID,omitempty" yaml:"networkResourceSubscriptionID,omitempty"`
}

AzureAuthConfig holds auth related part of cloud config

func (*AzureAuthConfig) UsesNetworkResourceInDifferentTenant

func (config *AzureAuthConfig) UsesNetworkResourceInDifferentTenant() bool

UsesNetworkResourceInDifferentTenant determines whether the AzureAuthConfig indicates to use network resources in different AAD Tenant and Subscription than those for the cluster Return true only when both NetworkResourceTenantID and NetworkResourceSubscriptionID are specified and they are not equals to TenantID and SubscriptionID