add upbound credentials source

apis/v1beta1/types.go

@@ -53,7 +53,7 @@ type ProviderConfigSpec struct {
 // ProviderCredentials required to authenticate.
 type ProviderCredentials struct {
 	// Source of the provider credentials.
-	// +kubebuilder:validation:Enum=None;Secret;UserAssignedManagedIdentity;SystemAssignedManagedIdentity;OIDCTokenFile
+	// +kubebuilder:validation:Enum=None;Secret;UserAssignedManagedIdentity;SystemAssignedManagedIdentity;OIDCTokenFile;Upbound
 	Source xpv1.CredentialsSource `json:"source"`
 
 	xpv1.CommonCredentialSelectors `json:",inline"`

examples/providerconfig/upbound.yaml

@@ -0,0 +1,10 @@
+apiVersion: azure.upbound.io/v1beta1
+kind: ProviderConfig
+metadata:
+  name: default
+spec:
+  clientID: <client ID>
+  tenantID: <tenant ID>
+  subscriptionID: <subscription ID>
+  credentials:
+    source: Upbound

internal/clients/azure.go

@@ -23,9 +23,9 @@ const (
 	errTrackUsage           = "cannot track ProviderConfig usage"
 	errExtractCredentials   = "cannot extract credentials"
 	errUnmarshalCredentials = "cannot unmarshal Azure credentials as JSON"
-	errSubscriptionIDNotSet = "subscription ID must be set in ProviderConfig when credential source is InjectedIdentity"
-	errTenantIDNotSet       = "tenant ID must be set in ProviderConfig when credential source is InjectedIdentity"
-	errClientIDNotSet       = "Client ID must be set in ProviderConfig when credential source is OIDCTokenFile"
+	errSubscriptionIDNotSet = "subscription ID must be set in ProviderConfig when credential source is InjectedIdentity, OIDCTokenFile or Upbound"
+	errTenantIDNotSet       = "tenant ID must be set in ProviderConfig when credential source is InjectedIdentity, OIDCTokenFile or Upbound"
+	errClientIDNotSet       = "client ID must be set in ProviderConfig when credential source is OIDCTokenFile or Upbound"
 	// Azure service principal credentials file JSON keys
 	keyAzureSubscriptionID = "subscriptionId"
 	keyAzureClientID       = "clientId"
@@ -51,6 +51,9 @@ var (
 	credentialsSourceUserAssignedManagedIdentity   xpv1.CredentialsSource = "UserAssignedManagedIdentity"
 	credentialsSourceSystemAssignedManagedIdentity xpv1.CredentialsSource = "SystemAssignedManagedIdentity"
 	credentialsSourceOIDCTokenFile                 xpv1.CredentialsSource = "OIDCTokenFile"
+	credentialsSourceUpbound                       xpv1.CredentialsSource = "Upbound"
+
+	upboundProviderIdentityTokenFile = "/var/run/secrets/upbound.io/provider/token"
 )
 
 // TerraformSetupBuilder returns Terraform setup with provider specific
@@ -98,6 +101,8 @@ func TerraformSetupBuilder(version, providerSource, providerVersion string, sche
 			err = msiAuth(pc, &ps)
 		case credentialsSourceOIDCTokenFile:
 			err = oidcAuth(pc, &ps)
+		case credentialsSourceUpbound:
+			err = upboundAuth(pc, &ps)
 		default:
 			err = spAuth(ctx, pc, &ps, client)
 		}
@@ -179,3 +184,22 @@ func oidcAuth(pc *v1beta1.ProviderConfig, ps *terraform.Setup) error {
 	return nil
 
 }
+
+func upboundAuth(pc *v1beta1.ProviderConfig, ps *terraform.Setup) error {
+	if pc.Spec.SubscriptionID == nil || len(*pc.Spec.SubscriptionID) == 0 {
+		return errors.New(errSubscriptionIDNotSet)
+	}
+	if pc.Spec.TenantID == nil || len(*pc.Spec.TenantID) == 0 {
+		return errors.New(errTenantIDNotSet)
+	}
+	if pc.Spec.ClientID == nil || len(*pc.Spec.ClientID) == 0 {
+		return errors.New(errClientIDNotSet)
+	}
+	ps.Configuration[keyOidcTokenFilePath] = upboundProviderIdentityTokenFile
+	ps.Configuration[keySubscriptionID] = *pc.Spec.SubscriptionID
+	ps.Configuration[keyTenantID] = *pc.Spec.TenantID
+	ps.Configuration[keyClientID] = *pc.Spec.ClientID
+	ps.Configuration[keyUseOIDC] = "true"
+	return nil
+
+}

package/crds/azure.upbound.io_providerconfigs.yaml

@@ -102,6 +102,7 @@ spec:
                     - UserAssignedManagedIdentity
                     - SystemAssignedManagedIdentity
                     - OIDCTokenFile
+                    - Upbound
                     type: string
                 required:
                 - source