Use Terraform for create Azure

CHANGELOG.md

@@ -25,6 +25,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 <!-- For changes in existing functionality.  -->
 - Verify measurements using [Rekor](https://github.com/sigstore/rekor) transparency log.
+- The `constellation create` on Azure now uses Terraform to create and destroy cloud resources.
 
 ### Deprecated
 <!-- For soon-to-be removed features. -->

cli/internal/cloudcmd/clients.go

@@ -9,7 +9,6 @@ package cloudcmd
 import (
 	"context"
 
-	azurecl "github.com/edgelesssys/constellation/v2/cli/internal/azure/client"
 	"github.com/edgelesssys/constellation/v2/cli/internal/terraform"
 	"github.com/edgelesssys/constellation/v2/internal/state"
 )
@@ -22,17 +21,6 @@ type terraformClient interface {
 	RemoveInstaller()
 }
 
-type azureclient interface {
-	GetState() state.ConstellationState
-	SetState(state.ConstellationState)
-	CreateApplicationInsight(ctx context.Context) error
-	CreateExternalLoadBalancer(ctx context.Context, isDebugCluster bool) error
-	CreateVirtualNetwork(ctx context.Context) error
-	CreateSecurityGroup(ctx context.Context, input azurecl.NetworkSecurityGroupInput) error
-	CreateInstances(ctx context.Context, input azurecl.CreateInstancesInput) error
-	TerminateResourceGroupResources(ctx context.Context) error
-}
-
 type libvirtRunner interface {
 	Start(ctx context.Context, containerName, imageName string) error
 	Stop(ctx context.Context) error

cli/internal/cloudcmd/clients_test.go

@@ -8,14 +8,9 @@ package cloudcmd
 
 import (
 	"context"
-	"strconv"
 	"testing"
 
-	azurecl "github.com/edgelesssys/constellation/v2/cli/internal/azure/client"
 	"github.com/edgelesssys/constellation/v2/cli/internal/terraform"
-	"github.com/edgelesssys/constellation/v2/internal/azureshared"
-	"github.com/edgelesssys/constellation/v2/internal/cloud/cloudprovider"
-	"github.com/edgelesssys/constellation/v2/internal/cloud/cloudtypes"
 	"github.com/edgelesssys/constellation/v2/internal/state"
 	"go.uber.org/goleak"
 )
@@ -27,173 +22,6 @@ func TestMain(m *testing.M) {
 	)
 }
 
-type fakeAzureClient struct {
-	workers       cloudtypes.Instances
-	controlPlanes cloudtypes.Instances
-
-	resourceGroup        string
-	name                 string
-	uid                  string
-	location             string
-	subscriptionID       string
-	tenantID             string
-	subnetID             string
-	loadBalancerName     string
-	controlPlaneScaleSet string
-	workerScaleSet       string
-	networkSecurityGroup string
-	adAppObjectID        string
-}
-
-func (c *fakeAzureClient) GetState() state.ConstellationState {
-	return state.ConstellationState{
-		CloudProvider:              cloudprovider.Azure.String(),
-		AzureWorkerInstances:       c.workers,
-		AzureControlPlaneInstances: c.controlPlanes,
-		Name:                       c.name,
-		UID:                        c.uid,
-		AzureResourceGroup:         c.resourceGroup,
-		AzureLocation:              c.location,
-		AzureSubscription:          c.subscriptionID,
-		AzureTenant:                c.tenantID,
-		AzureSubnet:                c.subnetID,
-		AzureNetworkSecurityGroup:  c.networkSecurityGroup,
-		AzureWorkerScaleSet:        c.workerScaleSet,
-		AzureControlPlaneScaleSet:  c.controlPlaneScaleSet,
-		AzureADAppObjectID:         c.adAppObjectID,
-	}
-}
-
-func (c *fakeAzureClient) SetState(stat state.ConstellationState) {
-	c.workers = stat.AzureWorkerInstances
-	c.controlPlanes = stat.AzureControlPlaneInstances
-	c.name = stat.Name
-	c.uid = stat.UID
-	c.resourceGroup = stat.AzureResourceGroup
-	c.location = stat.AzureLocation
-	c.subscriptionID = stat.AzureSubscription
-	c.tenantID = stat.AzureTenant
-	c.subnetID = stat.AzureSubnet
-	c.networkSecurityGroup = stat.AzureNetworkSecurityGroup
-	c.workerScaleSet = stat.AzureWorkerScaleSet
-	c.controlPlaneScaleSet = stat.AzureControlPlaneScaleSet
-	c.adAppObjectID = stat.AzureADAppObjectID
-}
-
-func (c *fakeAzureClient) CreateApplicationInsight(ctx context.Context) error {
-	return nil
-}
-
-func (c *fakeAzureClient) CreateVirtualNetwork(ctx context.Context) error {
-	c.subnetID = "subnet"
-	return nil
-}
-
-func (c *fakeAzureClient) CreateExternalLoadBalancer(ctx context.Context, isDebugCluster bool) error {
-	c.loadBalancerName = "loadBalancer"
-	return nil
-}
-
-func (c *fakeAzureClient) CreateSecurityGroup(ctx context.Context, input azurecl.NetworkSecurityGroupInput) error {
-	c.networkSecurityGroup = "network-security-group"
-	return nil
-}
-
-func (c *fakeAzureClient) CreateInstances(ctx context.Context, input azurecl.CreateInstancesInput) error {
-	c.controlPlaneScaleSet = "controlplanes-scale-set"
-	c.workerScaleSet = "workers-scale-set"
-	c.workers = make(cloudtypes.Instances)
-	for i := 0; i < input.CountWorkers; i++ {
-		id := "id-" + strconv.Itoa(i)
-		c.workers[id] = cloudtypes.Instance{PublicIP: "192.0.2.1", PrivateIP: "192.0.2.1"}
-	}
-	c.controlPlanes = make(cloudtypes.Instances)
-	for i := 0; i < input.CountControlPlanes; i++ {
-		id := "id-" + strconv.Itoa(i)
-		c.controlPlanes[id] = cloudtypes.Instance{PublicIP: "192.0.2.1", PrivateIP: "192.0.2.1"}
-	}
-	return nil
-}
-
-func (c *fakeAzureClient) CreateServicePrincipal(ctx context.Context) (string, error) {
-	c.adAppObjectID = "00000000-0000-0000-0000-000000000001"
-	return azureshared.ApplicationCredentials{
-		AppClientID:       "client-id",
-		ClientSecretValue: "client-secret",
-	}.ToCloudServiceAccountURI(), nil
-}
-
-func (c *fakeAzureClient) TerminateResourceGroupResources(ctx context.Context) error {
-	// TODO(katexochen)
-	return nil
-}
-
-func (c *fakeAzureClient) TerminateServicePrincipal(ctx context.Context) error {
-	if c.adAppObjectID == "" {
-		return nil
-	}
-	c.adAppObjectID = ""
-	return nil
-}
-
-type stubAzureClient struct {
-	terminateResourceGroupResourcesCalled bool
-	terminateServicePrincipalCalled       bool
-
-	createApplicationInsightErr        error
-	createVirtualNetworkErr            error
-	createSecurityGroupErr             error
-	createLoadBalancerErr              error
-	createInstancesErr                 error
-	createServicePrincipalErr          error
-	terminateResourceGroupResourcesErr error
-	terminateServicePrincipalErr       error
-}
-
-func (c *stubAzureClient) GetState() state.ConstellationState {
-	return state.ConstellationState{}
-}
-
-func (c *stubAzureClient) SetState(state.ConstellationState) {
-}
-
-func (c *stubAzureClient) CreateExternalLoadBalancer(ctx context.Context, isDebugCluster bool) error {
-	return c.createLoadBalancerErr
-}
-
-func (c *stubAzureClient) CreateApplicationInsight(ctx context.Context) error {
-	return c.createApplicationInsightErr
-}
-
-func (c *stubAzureClient) CreateVirtualNetwork(ctx context.Context) error {
-	return c.createVirtualNetworkErr
-}
-
-func (c *stubAzureClient) CreateSecurityGroup(ctx context.Context, input azurecl.NetworkSecurityGroupInput) error {
-	return c.createSecurityGroupErr
-}
-
-func (c *stubAzureClient) CreateInstances(ctx context.Context, input azurecl.CreateInstancesInput) error {
-	return c.createInstancesErr
-}
-
-func (c *stubAzureClient) CreateServicePrincipal(ctx context.Context) (string, error) {
-	return azureshared.ApplicationCredentials{
-		AppClientID:       "00000000-0000-0000-0000-000000000000",
-		ClientSecretValue: "secret",
-	}.ToCloudServiceAccountURI(), c.createServicePrincipalErr
-}
-
-func (c *stubAzureClient) TerminateResourceGroupResources(ctx context.Context) error {
-	c.terminateResourceGroupResourcesCalled = true
-	return c.terminateResourceGroupResourcesErr
-}
-
-func (c *stubAzureClient) TerminateServicePrincipal(ctx context.Context) error {
-	c.terminateServicePrincipalCalled = true
-	return c.terminateServicePrincipalErr
-}
-
 type stubTerraformClient struct {
 	state                  state.ConstellationState
 	cleanUpWorkspaceCalled bool

cli/internal/cloudcmd/create.go

@@ -15,13 +15,10 @@ import (
 	"runtime"
 	"strings"
 
-	azurecl "github.com/edgelesssys/constellation/v2/cli/internal/azure/client"
 	"github.com/edgelesssys/constellation/v2/cli/internal/libvirt"
 	"github.com/edgelesssys/constellation/v2/cli/internal/terraform"
 	"github.com/edgelesssys/constellation/v2/internal/cloud/cloudprovider"
-	"github.com/edgelesssys/constellation/v2/internal/cloud/cloudtypes"
 	"github.com/edgelesssys/constellation/v2/internal/config"
-	"github.com/edgelesssys/constellation/v2/internal/constants"
 	"github.com/edgelesssys/constellation/v2/internal/state"
 )
 
@@ -29,7 +26,6 @@ import (
 type Creator struct {
 	out                io.Writer
 	newTerraformClient func(ctx context.Context, provider cloudprovider.Provider) (terraformClient, error)
-	newAzureClient     func(subscriptionID, tenantID, name, location, resourceGroup string) (azureclient, error)
 	newLibvirtRunner   func() libvirtRunner
 }
 
@@ -40,9 +36,6 @@ func NewCreator(out io.Writer) *Creator {
 		newTerraformClient: func(ctx context.Context, provider cloudprovider.Provider) (terraformClient, error) {
 			return terraform.New(ctx, provider)
 		},
-		newAzureClient: func(subscriptionID, tenantID, name, location, resourceGroup string) (azureclient, error) {
-			return azurecl.NewInitialized(subscriptionID, tenantID, name, location, resourceGroup)
-		},
 		newLibvirtRunner: func() libvirtRunner {
 			return libvirt.New()
 		},
@@ -52,14 +45,6 @@ func NewCreator(out io.Writer) *Creator {
 // Create creates the handed amount of instances and all the needed resources.
 func (c *Creator) Create(ctx context.Context, provider cloudprovider.Provider, config *config.Config, name, insType string, controlPlaneCount, workerCount int,
 ) (state.ConstellationState, error) {
-	// Use debug ingress firewall rules when debug mode / image is enabled
-	var ingressRules cloudtypes.Firewall
-	if config.IsDebugCluster() {
-		ingressRules = constants.IngressRulesDebug
-	} else {
-		ingressRules = constants.IngressRulesNoDebug
-	}
-
 	switch provider {
 	case cloudprovider.GCP:
 		cl, err := c.newTerraformClient(ctx, provider)
@@ -69,17 +54,12 @@ func (c *Creator) Create(ctx context.Context, provider cloudprovider.Provider, c
 		defer cl.RemoveInstaller()
 		return c.createGCP(ctx, cl, config, name, insType, controlPlaneCount, workerCount)
 	case cloudprovider.Azure:
-		cl, err := c.newAzureClient(
-			config.Provider.Azure.SubscriptionID,
-			config.Provider.Azure.TenantID,
-			name,
-			config.Provider.Azure.Location,
-			config.Provider.Azure.ResourceGroup,
-		)
+		cl, err := c.newTerraformClient(ctx, provider)
 		if err != nil {
 			return state.ConstellationState{}, err
 		}
-		return c.createAzure(ctx, cl, config, insType, controlPlaneCount, workerCount, ingressRules)
+		defer cl.RemoveInstaller()
+		return c.createAzure(ctx, cl, config, name, insType, controlPlaneCount, workerCount)
 	case cloudprovider.QEMU:
 		if runtime.GOARCH != "amd64" || runtime.GOOS != "linux" {
 			return state.ConstellationState{}, fmt.Errorf("creation of a QEMU based Constellation is not supported for %s/%s", runtime.GOOS, runtime.GOARCH)
@@ -125,37 +105,29 @@ func (c *Creator) createGCP(ctx context.Context, cl terraformClient, config *con
 	return cl.GetState(), nil
 }
 
-func (c *Creator) createAzure(ctx context.Context, cl azureclient, config *config.Config, insType string, controlPlaneCount, workerCount int, ingressRules cloudtypes.Firewall,
+func (c *Creator) createAzure(ctx context.Context, cl terraformClient, config *config.Config,
+	name, insType string, controlPlaneCount, workerCount int,
 ) (stat state.ConstellationState, retErr error) {
-	defer rollbackOnError(context.Background(), c.out, &retErr, &rollbackerAzure{client: cl})
+	defer rollbackOnError(context.Background(), c.out, &retErr, &rollbackerTerraform{client: cl})
 
-	if err := cl.CreateApplicationInsight(ctx); err != nil {
-		return state.ConstellationState{}, err
-	}
-	if err := cl.CreateExternalLoadBalancer(ctx, config.IsDebugCluster()); err != nil {
-		return state.ConstellationState{}, err
-	}
-	if err := cl.CreateVirtualNetwork(ctx); err != nil {
-		return state.ConstellationState{}, err
-	}
-
-	if err := cl.CreateSecurityGroup(ctx, azurecl.NetworkSecurityGroupInput{
-		Ingress: ingressRules,
-		Egress:  constants.EgressRules,
-	}); err != nil {
-		return state.ConstellationState{}, err
-	}
-	createInput := azurecl.CreateInstancesInput{
+	vars := &terraform.AzureVariables{
+		CommonVariables: terraform.CommonVariables{
+			Name:               name,
 			CountControlPlanes: controlPlaneCount,
 			CountWorkers:       workerCount,
-		InstanceType:         insType,
 			StateDiskSizeGB:    config.StateDiskSizeGB,
+		},
+		Location:             config.Provider.Azure.Location,
+		ResourceGroup:        config.Provider.Azure.ResourceGroup,
+		UserAssignedIdentity: config.Provider.Azure.UserAssignedIdentity,
+		InstanceType:         insType,
 		StateDiskType:        config.Provider.Azure.StateDiskType,
-		Image:                config.Provider.Azure.Image,
-		UserAssingedIdentity: config.Provider.Azure.UserAssignedIdentity,
+		ImageID:              config.Provider.Azure.Image,
 		ConfidentialVM:       *config.Provider.Azure.ConfidentialVM,
+		Debug:                config.IsDebugCluster(),
 	}
-	if err := cl.CreateInstances(ctx, createInput); err != nil {
+
+	if err := cl.CreateCluster(ctx, name, vars); err != nil {
 		return state.ConstellationState{}, err
 	}
 

cli/internal/cloudcmd/create_test.go

@@ -14,7 +14,6 @@ import (
 	"testing"
 
 	"github.com/edgelesssys/constellation/v2/internal/cloud/cloudprovider"
-	"github.com/edgelesssys/constellation/v2/internal/cloud/cloudtypes"
 	"github.com/edgelesssys/constellation/v2/internal/config"
 	"github.com/edgelesssys/constellation/v2/internal/state"
 	"github.com/stretchr/testify/assert"
@@ -33,30 +32,11 @@ func TestCreator(t *testing.T) {
 		LoadBalancerIP: "192.0.2.1",
 	}
 
-	wantAzureState := state.ConstellationState{
-		CloudProvider: cloudprovider.Azure.String(),
-		AzureControlPlaneInstances: cloudtypes.Instances{
-			"id-0": {PrivateIP: "192.0.2.1", PublicIP: "192.0.2.1"},
-			"id-1": {PrivateIP: "192.0.2.1", PublicIP: "192.0.2.1"},
-		},
-		AzureWorkerInstances: cloudtypes.Instances{
-			"id-0": {PrivateIP: "192.0.2.1", PublicIP: "192.0.2.1"},
-			"id-1": {PrivateIP: "192.0.2.1", PublicIP: "192.0.2.1"},
-			"id-2": {PrivateIP: "192.0.2.1", PublicIP: "192.0.2.1"},
-		},
-		AzureSubnet:               "subnet",
-		AzureNetworkSecurityGroup: "network-security-group",
-		AzureWorkerScaleSet:       "workers-scale-set",
-		AzureControlPlaneScaleSet: "controlplanes-scale-set",
-	}
-
 	someErr := errors.New("failed")
 
 	testCases := map[string]struct {
 		tfClient       terraformClient
 		newTfClientErr error
-		azureclient       azureclient
-		newAzureClientErr error
 		libvirt        *stubLibvirtRunner
 		provider       cloudprovider.Provider
 		config         *config.Config
@@ -114,39 +94,6 @@ func TestCreator(t *testing.T) {
 			wantErr:      true,
 			wantRollback: !failOnNonAMD64,
 		},
-		"azure": {
-			azureclient: &fakeAzureClient{},
-			provider:    cloudprovider.Azure,
-			config:      config.Default(),
-			wantState:   wantAzureState,
-		},
-		"azure newAzureClient error": {
-			newAzureClientErr: someErr,
-			provider:          cloudprovider.Azure,
-			config:            config.Default(),
-			wantErr:           true,
-		},
-		"azure CreateVirtualNetwork error": {
-			azureclient:  &stubAzureClient{createVirtualNetworkErr: someErr},
-			provider:     cloudprovider.Azure,
-			config:       config.Default(),
-			wantErr:      true,
-			wantRollback: true,
-		},
-		"azure CreateSecurityGroup error": {
-			azureclient:  &stubAzureClient{createSecurityGroupErr: someErr},
-			provider:     cloudprovider.Azure,
-			config:       config.Default(),
-			wantErr:      true,
-			wantRollback: true,
-		},
-		"azure CreateInstances error": {
-			azureclient:  &stubAzureClient{createInstancesErr: someErr},
-			provider:     cloudprovider.Azure,
-			config:       config.Default(),
-			wantErr:      true,
-			wantRollback: true,
-		},
 		"unknown provider": {
 			provider: cloudprovider.Unknown,
 			config:   config.Default(),
@@ -163,9 +110,6 @@ func TestCreator(t *testing.T) {
 				newTerraformClient: func(ctx context.Context, provider cloudprovider.Provider) (terraformClient, error) {
 					return tc.tfClient, tc.newTfClientErr
 				},
-				newAzureClient: func(subscriptionID, tenantID, name, location, resourceGroup string) (azureclient, error) {
-					return tc.azureclient, tc.newAzureClientErr
-				},
 				newLibvirtRunner: func() libvirtRunner {
 					return tc.libvirt
 				},
@@ -176,19 +120,11 @@ func TestCreator(t *testing.T) {
 			if tc.wantErr {
 				assert.Error(err)
 				if tc.wantRollback {
-					switch tc.provider {
-					case cloudprovider.QEMU:
 					cl := tc.tfClient.(*stubTerraformClient)
 					assert.True(cl.destroyClusterCalled)
 					assert.True(cl.cleanUpWorkspaceCalled)
+					if tc.provider == cloudprovider.QEMU {
 						assert.True(tc.libvirt.stopCalled)
-					case cloudprovider.GCP:
-						cl := tc.tfClient.(*stubTerraformClient)
-						assert.True(cl.destroyClusterCalled)
-						assert.True(cl.cleanUpWorkspaceCalled)
-					case cloudprovider.Azure:
-						cl := tc.azureclient.(*stubAzureClient)
-						assert.True(cl.terminateResourceGroupResourcesCalled)
 					}
 				}
 			} else {

cli/internal/cloudcmd/rollback.go

@@ -34,14 +34,6 @@ func rollbackOnError(ctx context.Context, w io.Writer, onErr *error, roll rollba
 	fmt.Fprintln(w, "Rollback succeeded.")
 }
 
-type rollbackerAzure struct {
-	client azureclient
-}
-
-func (r *rollbackerAzure) rollback(ctx context.Context) error {
-	return r.client.TerminateResourceGroupResources(ctx)
-}
-
 type rollbackerTerraform struct {
 	client terraformClient
 }

cli/internal/cloudcmd/terminate.go

@@ -10,7 +10,6 @@ import (
 	"context"
 	"fmt"
 
-	azurecl "github.com/edgelesssys/constellation/v2/cli/internal/azure/client"
 	"github.com/edgelesssys/constellation/v2/cli/internal/libvirt"
 	"github.com/edgelesssys/constellation/v2/cli/internal/terraform"
 	"github.com/edgelesssys/constellation/v2/internal/cloud/cloudprovider"
@@ -19,19 +18,15 @@ import (
 
 // Terminator deletes cloud provider resources.
 type Terminator struct {
-	newTerraformClient func(ctx context.Context) (terraformClient, error)
-	newAzureClient     func(subscriptionID, tenantID string) (azureclient, error)
+	newTerraformClient func(ctx context.Context, provider cloudprovider.Provider) (terraformClient, error)
 	newLibvirtRunner   func() libvirtRunner
 }
 
 // NewTerminator create a new cloud terminator.
 func NewTerminator() *Terminator {
 	return &Terminator{
-		newTerraformClient: func(ctx context.Context) (terraformClient, error) {
-			return terraform.New(ctx, cloudprovider.GCP)
-		},
-		newAzureClient: func(subscriptionID, tenantID string) (azureclient, error) {
-			return azurecl.NewFromDefault(subscriptionID, tenantID)
+		newTerraformClient: func(ctx context.Context, provider cloudprovider.Provider) (terraformClient, error) {
+			return terraform.New(ctx, provider)
 		},
 		newLibvirtRunner: func() libvirtRunner {
 			return libvirt.New()
@@ -42,37 +37,22 @@ func NewTerminator() *Terminator {
 // Terminate deletes the could provider resources defined in the constellation state.
 func (t *Terminator) Terminate(ctx context.Context, state state.ConstellationState) error {
 	provider := cloudprovider.FromString(state.CloudProvider)
-	switch provider {
-	case cloudprovider.Azure:
-		cl, err := t.newAzureClient(state.AzureSubscription, state.AzureTenant)
-		if err != nil {
-			return err
+	if provider == cloudprovider.Unknown {
+		return fmt.Errorf("unknown cloud provider %s", state.CloudProvider)
 	}
-		return t.terminateAzure(ctx, cl, state)
-	case cloudprovider.GCP:
-		cl, err := t.newTerraformClient(ctx)
-		if err != nil {
-			return err
-		}
-		defer cl.RemoveInstaller()
-		return t.terminateTerraform(ctx, cl)
-	case cloudprovider.QEMU:
-		cl, err := t.newTerraformClient(ctx)
+
+	cl, err := t.newTerraformClient(ctx, provider)
 	if err != nil {
 		return err
 	}
 	defer cl.RemoveInstaller()
+
+	if provider == cloudprovider.QEMU {
 		libvirt := t.newLibvirtRunner()
 		return t.terminateQEMU(ctx, cl, libvirt)
-	default:
-		return fmt.Errorf("unsupported provider: %s", provider)
-	}
 	}
 
-func (t *Terminator) terminateAzure(ctx context.Context, cl azureclient, state state.ConstellationState) error {
-	cl.SetState(state)
-
-	return cl.TerminateResourceGroupResources(ctx)
+	return t.terminateTerraform(ctx, cl)
 }
 
 func (t *Terminator) terminateTerraform(ctx context.Context, cl terraformClient) error {

cli/internal/cloudcmd/terminate_test.go

@@ -12,32 +12,16 @@ import (
 	"testing"
 
 	"github.com/edgelesssys/constellation/v2/internal/cloud/cloudprovider"
-	"github.com/edgelesssys/constellation/v2/internal/cloud/cloudtypes"
 	"github.com/edgelesssys/constellation/v2/internal/state"
 	"github.com/stretchr/testify/assert"
 )
 
 func TestTerminator(t *testing.T) {
-	someAzureState := func() state.ConstellationState {
-		return state.ConstellationState{
-			CloudProvider: cloudprovider.Azure.String(),
-			AzureWorkerInstances: cloudtypes.Instances{
-				"id-0": {PrivateIP: "192.0.2.1", PublicIP: "192.0.2.1"},
-				"id-1": {PrivateIP: "192.0.2.1", PublicIP: "192.0.2.1"},
-			},
-			AzureControlPlaneInstances: cloudtypes.Instances{
-				"id-c": {PrivateIP: "192.0.2.1", PublicIP: "192.0.2.1"},
-			},
-			AzureADAppObjectID: "00000000-0000-0000-0000-000000000001",
-		}
-	}
 	someErr := errors.New("failed")
 
 	testCases := map[string]struct {
 		tfClient       terraformClient
 		newTfClientErr error
-		azureclient       azureclient
-		newAzureClientErr error
 		libvirt        *stubLibvirtRunner
 		state          state.ConstellationState
 		wantErr        bool
@@ -84,20 +68,6 @@ func TestTerminator(t *testing.T) {
 			state:    state.ConstellationState{CloudProvider: cloudprovider.QEMU.String()},
 			wantErr:  true,
 		},
-		"azure": {
-			azureclient: &stubAzureClient{},
-			state:       someAzureState(),
-		},
-		"azure newAzureClient error": {
-			newAzureClientErr: someErr,
-			state:             someAzureState(),
-			wantErr:           true,
-		},
-		"azure terminateResourceGroupResources error": {
-			azureclient: &stubAzureClient{terminateResourceGroupResourcesErr: someErr},
-			state:       someAzureState(),
-			wantErr:     true,
-		},
 		"unknown cloud provider": {
 			state:   state.ConstellationState{},
 			wantErr: true,
@@ -109,12 +79,9 @@ func TestTerminator(t *testing.T) {
 			assert := assert.New(t)
 
 			terminator := &Terminator{
-				newTerraformClient: func(ctx context.Context) (terraformClient, error) {
+				newTerraformClient: func(ctx context.Context, provider cloudprovider.Provider) (terraformClient, error) {
 					return tc.tfClient, tc.newTfClientErr
 				},
-				newAzureClient: func(subscriptionID, tenantID string) (azureclient, error) {
-					return tc.azureclient, tc.newAzureClientErr
-				},
 				newLibvirtRunner: func() libvirtRunner {
 					return tc.libvirt
 				},
@@ -126,17 +93,11 @@ func TestTerminator(t *testing.T) {
 				assert.Error(err)
 			} else {
 				assert.NoError(err)
-				switch cloudprovider.FromString(tc.state.CloudProvider) {
-				case cloudprovider.QEMU:
-					assert.True(tc.libvirt.stopCalled)
-					fallthrough
-				case cloudprovider.GCP:
 				cl := tc.tfClient.(*stubTerraformClient)
 				assert.True(cl.destroyClusterCalled)
 				assert.True(cl.removeInstallerCalled)
-				case cloudprovider.Azure:
-					cl := tc.azureclient.(*stubAzureClient)
-					assert.True(cl.terminateResourceGroupResourcesCalled)
+				if cloudprovider.FromString(tc.state.CloudProvider) == cloudprovider.QEMU {
+					assert.True(tc.libvirt.stopCalled)
 				}
 			}
 		})

cli/internal/terraform/variables.go

@@ -78,6 +78,45 @@ func (v *GCPVariables) String() string {
 	return b.String()
 }
 
+// AzureVariables is user configuration for creating a cluster with Terraform on Azure.
+type AzureVariables struct {
+	// CommonVariables contains common variables.
+	CommonVariables
+
+	// ResourceGroup is the name of the Azure resource group to use.
+	ResourceGroup string
+	// Location is the Azure location to use.
+	Location string
+	// UserAssignedIdentity is the name of the Azure user-assigned identity to use.
+	UserAssignedIdentity string
+	// InstanceType is the Azure instance type to use.
+	InstanceType string
+	// StateDiskType is the Azure disk type to use for the state disk.
+	StateDiskType string
+	// ImageID is the ID of the Azure image to use.
+	ImageID string
+	// ConfidentialVM sets the VM to be confidential.
+	ConfidentialVM bool
+	// Debug is true if debug mode is enabled.
+	Debug bool
+}
+
+// String returns a string representation of the variables, formatted as Terraform variables.
+func (v *AzureVariables) String() string {
+	b := &strings.Builder{}
+	b.WriteString(v.CommonVariables.String())
+	writeLinef(b, "resource_group = %q", v.ResourceGroup)
+	writeLinef(b, "location = %q", v.Location)
+	writeLinef(b, "user_assigned_identity = %q", v.UserAssignedIdentity)
+	writeLinef(b, "instance_type = %q", v.InstanceType)
+	writeLinef(b, "state_disk_type = %q", v.StateDiskType)
+	writeLinef(b, "image_id = %q", v.ImageID)
+	writeLinef(b, "confidential_vm = %t", v.ConfidentialVM)
+	writeLinef(b, "debug = %t", v.Debug)
+
+	return b.String()
+}
+
 // QEMUVariables is user configuration for creating a QEMU cluster with Terraform.
 type QEMUVariables struct {
 	// CommonVariables contains common variables.