Cloud provider GCP: add Secrets / Volumes / VolumeMounts / Env to cluster-autoscaler deployment

coordinator/cloudprovider/gcp/autoscaler.go

@@ -1,5 +1,11 @@
 package gcp
 
+import (
+	"github.com/edgelesssys/constellation/coordinator/core"
+	"github.com/edgelesssys/constellation/coordinator/kubernetes/k8sapi/resources"
+	k8s "k8s.io/api/core/v1"
+)
+
 // Autoscaler holds the GCP cluster-autoscaler configuration.
 type Autoscaler struct{}
 
@@ -8,6 +14,46 @@ func (a *Autoscaler) Name() string {
 	return "gce"
 }
 
+// Secrets returns a list of secrets to deploy together with the k8s cluster-autoscaler.
+func (a *Autoscaler) Secrets(instance core.Instance, cloudServiceAccountURI string) (resources.Secrets, error) {
+	return resources.Secrets{}, nil
+}
+
+// Volumes returns a list of volumes to deploy together with the k8s cluster-autoscaler.
+func (a *Autoscaler) Volumes() []k8s.Volume {
+	return []k8s.Volume{
+		{
+			Name: "gcekey",
+			VolumeSource: k8s.VolumeSource{
+				Secret: &k8s.SecretVolumeSource{
+					SecretName: "gcekey",
+				},
+			},
+		},
+	}
+}
+
+// VolumeMounts returns a list of volume mounts to deploy together with the k8s cluster-autoscaler.
+func (a *Autoscaler) VolumeMounts() []k8s.VolumeMount {
+	return []k8s.VolumeMount{
+		{
+			Name:      "gcekey",
+			ReadOnly:  true,
+			MountPath: "/var/secrets/google",
+		},
+	}
+}
+
+// Env returns a list of k8s environment key-value pairs to deploy together with the k8s cluster-autoscaler.
+func (a *Autoscaler) Env() []k8s.EnvVar {
+	return []k8s.EnvVar{
+		{
+			Name:  "GOOGLE_APPLICATION_CREDENTIALS",
+			Value: "/var/secrets/google/key.json",
+		},
+	}
+}
+
 // Supported is used to determine if we support autoscaling for the cloud provider.
 func (a *Autoscaler) Supported() bool {
 	return true

coordinator/cloudprovider/gcp/autoscaler_test.go

@@ -3,6 +3,7 @@ package gcp
 import (
 	"testing"
 
+	"github.com/edgelesssys/constellation/coordinator/core"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -11,5 +12,9 @@ func TestTrivialAutoscalerFunctions(t *testing.T) {
 	autoscaler := Autoscaler{}
 
 	assert.NotEmpty(autoscaler.Name())
+	assert.Empty(autoscaler.Secrets(core.Instance{}, ""))
+	assert.NotEmpty(autoscaler.Volumes())
+	assert.NotEmpty(autoscaler.VolumeMounts())
+	assert.NotEmpty(autoscaler.Env())
 	assert.True(autoscaler.Supported())
 }