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/
delete.go
217 lines (170 loc) · 7.15 KB
/
delete.go
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package nodepool
import (
"context"
"fmt"
"github.com/giantswarm/apiextensions/v6/pkg/label"
"github.com/giantswarm/microerror"
corev1 "k8s.io/api/core/v1"
capz "sigs.k8s.io/cluster-api-provider-azure/api/v1beta1"
capzexp "sigs.k8s.io/cluster-api-provider-azure/exp/api/v1beta1"
"sigs.k8s.io/cluster-api/util"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/giantswarm/azure-operator/v6/pkg/tenantcluster"
"github.com/giantswarm/azure-operator/v6/service/controller/key"
)
// EnsureDeleted is a noop since the deletion of deployments is redirected to
// the deletion of resource groups because they garbage collect them.
func (r *Resource) EnsureDeleted(ctx context.Context, obj interface{}) error {
azureMachinePool, err := key.ToAzureMachinePool(obj)
if err != nil {
return microerror.Mask(err)
}
cluster, err := util.GetClusterFromMetadata(ctx, r.CtrlClient, azureMachinePool.ObjectMeta)
if err != nil {
return microerror.Mask(err)
}
azureCluster, err := r.getAzureClusterFromCluster(ctx, cluster)
if err != nil {
return microerror.Mask(err)
}
tenantClusterK8sClient, err := r.tenantClientFactory.GetClient(ctx, cluster)
if tenantcluster.IsAPINotAvailableError(err) {
r.Logger.Debugf(ctx, "tenant API not available yet")
r.Logger.Debugf(ctx, "canceling resource")
return nil
} else if err != nil {
return microerror.Mask(err)
}
err = r.removeNodesFromK8s(ctx, tenantClusterK8sClient, &azureMachinePool)
if err != nil {
return microerror.Mask(err)
}
err = r.removeNodePool(ctx, &azureMachinePool)
if err != nil {
return microerror.Mask(err)
}
err = r.removeSubnetFromAzureCluster(ctx, azureCluster, azureMachinePool.Name)
if err != nil {
return microerror.Mask(err)
}
return nil
}
func (r *Resource) removeSubnetFromAzureCluster(ctx context.Context, azureCluster *capz.AzureCluster, subnetName string) error {
subnetPosition := -1
for i, subnet := range azureCluster.Spec.NetworkSpec.Subnets {
if subnet.Name == subnetName {
subnetPosition = i
}
}
subnetIsFound := subnetPosition >= 0
if subnetIsFound {
azureCluster.Spec.NetworkSpec.Subnets = append(azureCluster.Spec.NetworkSpec.Subnets[:subnetPosition], azureCluster.Spec.NetworkSpec.Subnets[subnetPosition+1:]...)
r.Logger.LogCtx(ctx, "message", "Ensuring subnet is not in AzureCluster", "subnetName", subnetName)
err := r.CtrlClient.Update(ctx, azureCluster)
if err != nil {
return microerror.Mask(err)
}
r.Logger.LogCtx(ctx, "message", "Ensured subnet is not in AzureCluster", "subnetName", subnetName)
}
return nil
}
func (r *Resource) removeNodePool(ctx context.Context, azureMachinePool *capzexp.AzureMachinePool) error {
var err error
err = r.deleteARMDeployment(ctx, azureMachinePool, key.ClusterID(azureMachinePool), key.NodePoolDeploymentName(azureMachinePool))
if err != nil {
return microerror.Mask(err)
}
err = r.deleteVMSS(ctx, azureMachinePool, key.ClusterID(azureMachinePool), key.NodePoolVMSSName(azureMachinePool))
if err != nil {
return microerror.Mask(err)
}
return nil
}
// Deletes all the node objects belonging to the node pool using the k8s API.
// This happens automatically eventually, but we make this much quicker by doing it on the API server directly.
func (r *Resource) removeNodesFromK8s(ctx context.Context, ctrlClient client.Client, azureMachinePool *capzexp.AzureMachinePool) error {
r.Logger.LogCtx(ctx, "message", fmt.Sprintf("Deleting nodes from k8s API for machine pool %s", azureMachinePool.Name))
err := ctrlClient.DeleteAllOf(ctx, &corev1.Node{}, client.MatchingLabels{label.MachinePool: azureMachinePool.Name})
if err != nil {
return microerror.Mask(err)
}
r.Logger.LogCtx(ctx, "message", fmt.Sprintf("Deleted nodes from k8s API for machine pool %s", azureMachinePool.Name))
return nil
}
// deleteARMDeployment deletes the ARM deployment from Azure.
func (r *Resource) deleteARMDeployment(ctx context.Context, azureMachinePool *capzexp.AzureMachinePool, resourceGroupName, deploymentName string) error {
r.Logger.Debugf(ctx, "Deleting machine pool ARM deployment")
deploymentsClient, err := r.ClientFactory.GetDeploymentsClient(ctx, azureMachinePool.ObjectMeta)
if err != nil {
return microerror.Mask(err)
}
_, err = deploymentsClient.Delete(ctx, resourceGroupName, deploymentName)
if IsDeploymentNotFound(err) {
r.Logger.Debugf(ctx, "Machine pool ARM deployment was already deleted")
return nil
} else if err != nil {
return microerror.Mask(err)
}
r.Logger.Debugf(ctx, "Deleted machine pool ARM deployment")
return nil
}
// deleteVMSS deletes the VMSS from Azure.
func (r *Resource) deleteVMSS(ctx context.Context, azureMachinePool *capzexp.AzureMachinePool, resourceGroupName, vmssName string) error {
virtualMachineScaleSetsClient, err := r.ClientFactory.GetVirtualMachineScaleSetsClient(ctx, azureMachinePool.ObjectMeta)
if err != nil {
return microerror.Mask(err)
}
// Delete role assignment related to this VMSS.
{
vmss, err := virtualMachineScaleSetsClient.Get(ctx, resourceGroupName, vmssName)
if IsNotFound(err) {
r.Logger.LogCtx(ctx, "message", "Machine pool VMSS was already deleted")
return nil
} else if err != nil {
return microerror.Mask(err)
}
if vmss.Identity.PrincipalID != nil {
err = r.removeRoleAssignmentForPrincipalID(ctx, azureMachinePool, *vmss.Identity.PrincipalID)
if err != nil {
return microerror.Mask(err)
}
}
}
r.Logger.LogCtx(ctx, "message", "Deleting machine pool VMSS")
_, err = virtualMachineScaleSetsClient.Delete(ctx, resourceGroupName, vmssName)
if IsNotFound(err) {
r.Logger.LogCtx(ctx, "message", "Machine pool VMSS was already deleted")
return nil
} else if err != nil {
return microerror.Mask(err)
}
r.Logger.LogCtx(ctx, "message", "Deleted machine pool VMSS")
return nil
}
// removeRoleAssignment deletes the role assignment from a node pool's VMSS to allow recreation of a node pool with the same name.
func (r *Resource) removeRoleAssignmentForPrincipalID(ctx context.Context, azureMachinePool *capzexp.AzureMachinePool, principalID string) error {
r.Logger.LogCtx(ctx, "message", "Deleting machine pool VMSS's role assignment(s)")
roleAssignmentsClient, err := r.ClientFactory.GetRoleAssignmentsClient(ctx, azureMachinePool.ObjectMeta)
if err != nil {
return microerror.Mask(err)
}
scope := fmt.Sprintf("/subscriptions/%s/resourcegroups/%s", roleAssignmentsClient.SubscriptionID, key.ClusterID(azureMachinePool))
results, err := roleAssignmentsClient.ListForScope(ctx, scope, fmt.Sprintf("principalId eq '%s'", principalID))
if err != nil {
return microerror.Mask(err)
}
r.Logger.Debugf(ctx, "Found %d role assignments to delete", len(results.Values()))
for _, roleAssignment := range results.Values() {
r.Logger.Debugf(ctx, "Deleting role assignment %q", *roleAssignment.Name)
_, err = roleAssignmentsClient.Delete(ctx, scope, *roleAssignment.Name)
if IsNotFound(err) {
r.Logger.Debugf(ctx, "Role assignment %q was already deleted", *roleAssignment.Name)
return nil
} else if err != nil {
return microerror.Mask(err)
}
r.Logger.Debugf(ctx, "Deleted role assignment %q", *roleAssignment.Name)
}
r.Logger.Debugf(ctx, "Deleted %d machine pool VMSS's role assignment(s)", len(results.Values()))
return nil
}