constellation/internal/cloud/azure/autoscaler.go
2022-09-22 09:10:19 +02:00

130 lines
3.7 KiB
Go

/*
Copyright (c) Edgeless Systems GmbH
SPDX-License-Identifier: AGPL-3.0-only
*/
package azure
import (
"github.com/edgelesssys/constellation/v2/internal/azureshared"
"github.com/edgelesssys/constellation/v2/internal/kubernetes"
k8s "k8s.io/api/core/v1"
meta "k8s.io/apimachinery/pkg/apis/meta/v1"
)
// Autoscaler holds the Azure cluster-autoscaler configuration.
type Autoscaler struct{}
// Name returns the cloud-provider name as used by k8s cluster-autoscaler.
func (a *Autoscaler) Name() string {
return "azure"
}
// Secrets returns a list of secrets to deploy together with the k8s cluster-autoscaler.
func (a *Autoscaler) Secrets(providerID string, cloudServiceAccountURI string) (kubernetes.Secrets, error) {
subscriptionID, resourceGroup, err := azureshared.BasicsFromProviderID(providerID)
if err != nil {
return kubernetes.Secrets{}, err
}
creds, err := azureshared.ApplicationCredentialsFromURI(cloudServiceAccountURI)
if err != nil {
return kubernetes.Secrets{}, err
}
return kubernetes.Secrets{
&k8s.Secret{
TypeMeta: meta.TypeMeta{
Kind: "Secret",
APIVersion: "v1",
},
ObjectMeta: meta.ObjectMeta{
Name: "cluster-autoscaler-azure",
Namespace: "kube-system",
},
Data: map[string][]byte{
"ClientID": []byte(creds.AppClientID),
"ClientSecret": []byte(creds.ClientSecretValue),
"ResourceGroup": []byte(resourceGroup),
"SubscriptionID": []byte(subscriptionID),
"TenantID": []byte(creds.TenantID),
"VMType": []byte("vmss"),
},
},
}, nil
}
// Volumes returns a list of volumes to deploy together with the k8s cluster-autoscaler.
func (a *Autoscaler) Volumes() []k8s.Volume {
return []k8s.Volume{}
}
// VolumeMounts returns a list of volume mounts to deploy together with the k8s cluster-autoscaler.
func (a *Autoscaler) VolumeMounts() []k8s.VolumeMount {
return []k8s.VolumeMount{}
}
// 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: "ARM_SUBSCRIPTION_ID",
ValueFrom: &k8s.EnvVarSource{
SecretKeyRef: &k8s.SecretKeySelector{
Key: "SubscriptionID",
LocalObjectReference: k8s.LocalObjectReference{Name: "cluster-autoscaler-azure"},
},
},
},
{
Name: "ARM_RESOURCE_GROUP",
ValueFrom: &k8s.EnvVarSource{
SecretKeyRef: &k8s.SecretKeySelector{
Key: "ResourceGroup",
LocalObjectReference: k8s.LocalObjectReference{Name: "cluster-autoscaler-azure"},
},
},
},
{
Name: "ARM_TENANT_ID",
ValueFrom: &k8s.EnvVarSource{
SecretKeyRef: &k8s.SecretKeySelector{
Key: "TenantID",
LocalObjectReference: k8s.LocalObjectReference{Name: "cluster-autoscaler-azure"},
},
},
},
{
Name: "ARM_CLIENT_ID",
ValueFrom: &k8s.EnvVarSource{
SecretKeyRef: &k8s.SecretKeySelector{
Key: "ClientID",
LocalObjectReference: k8s.LocalObjectReference{Name: "cluster-autoscaler-azure"},
},
},
},
{
Name: "ARM_CLIENT_SECRET",
ValueFrom: &k8s.EnvVarSource{
SecretKeyRef: &k8s.SecretKeySelector{
Key: "ClientSecret",
LocalObjectReference: k8s.LocalObjectReference{Name: "cluster-autoscaler-azure"},
},
},
},
{
Name: "ARM_VM_TYPE",
ValueFrom: &k8s.EnvVarSource{
SecretKeyRef: &k8s.SecretKeySelector{
Key: "VMType",
LocalObjectReference: k8s.LocalObjectReference{Name: "cluster-autoscaler-azure"},
},
},
},
}
}
// Supported is used to determine if we support autoscaling for the cloud provider.
func (a *Autoscaler) Supported() bool {
return true
}