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resource.go
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resource.go
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package clusterownerreference
import (
"context"
"github.com/giantswarm/microerror"
"github.com/giantswarm/micrologger"
corev1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/tools/reference"
"sigs.k8s.io/cluster-api-provider-azure/api/v1alpha3"
capiv1alpha3 "sigs.k8s.io/cluster-api/api/v1alpha3"
expcapiv1alpha3 "sigs.k8s.io/cluster-api/exp/api/v1alpha3"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
"github.com/giantswarm/azure-operator/v5/service/controller/key"
)
const (
// Name is the identifier of the resource.
Name = "clusterownerreference"
)
type Config struct {
CtrlClient client.Client
Logger micrologger.Logger
Scheme *runtime.Scheme
}
// Resource ensures Cluster owns AzureCluster and MachinePool.
type Resource struct {
ctrlClient client.Client
logger micrologger.Logger
scheme *runtime.Scheme
}
func New(config Config) (*Resource, error) {
if config.CtrlClient == nil {
return nil, microerror.Maskf(invalidConfigError, "%T.CtrlClient must not be empty", config)
}
if config.Logger == nil {
return nil, microerror.Maskf(invalidConfigError, "%T.Logger must not be empty", config)
}
if config.Scheme == nil {
return nil, microerror.Maskf(invalidConfigError, "%T.Scheme must not be empty", config)
}
r := &Resource{
ctrlClient: config.CtrlClient,
logger: config.Logger,
scheme: config.Scheme,
}
return r, nil
}
// EnsureCreated ensures that OwnerReference is correctly set for
// infrastructure CR.
func (r *Resource) EnsureCreated(ctx context.Context, obj interface{}) error {
cluster, err := key.ToCluster(obj)
if err != nil {
return microerror.Mask(err)
}
err = r.ensureAzureCluster(ctx, cluster)
if IsCRBeingDeletedError(err) {
r.logger.Debugf(ctx, "AzureCluster is being deleted, skipping setting owner references")
return nil
} else if err != nil {
return microerror.Mask(err)
}
err = r.ensureMachinePools(ctx, cluster)
if err != nil {
return microerror.Mask(err)
}
err = r.ensureControlPlane(ctx, &cluster)
if err != nil {
return microerror.Mask(err)
}
return nil
}
// EnsureDeleted is no-op.
func (r *Resource) EnsureDeleted(ctx context.Context, obj interface{}) error {
return nil
}
// Name returns the resource name.
func (r *Resource) Name() string {
return Name
}
func (r *Resource) ensureAzureCluster(ctx context.Context, cluster capiv1alpha3.Cluster) error {
var err error
r.logger.Debugf(ctx, "Ensuring %s label and 'ownerReference' fields on AzureCluster '%s/%s'", capiv1alpha3.ClusterLabelName, cluster.Namespace, cluster.Spec.InfrastructureRef.Name)
azureCluster := v1alpha3.AzureCluster{}
err = r.ctrlClient.Get(ctx, client.ObjectKey{Namespace: cluster.Namespace, Name: cluster.Spec.InfrastructureRef.Name}, &azureCluster)
if err != nil {
return microerror.Mask(err)
}
if !azureCluster.GetDeletionTimestamp().IsZero() {
return microerror.Mask(crBeingDeletedError)
}
if azureCluster.Labels == nil {
azureCluster.Labels = make(map[string]string)
}
azureCluster.Labels[capiv1alpha3.ClusterLabelName] = cluster.Name
// Set Cluster as owner of AzureCluster
err = controllerutil.SetControllerReference(&cluster, &azureCluster, r.scheme)
if err != nil {
return microerror.Mask(err)
}
err = r.ctrlClient.Update(ctx, &azureCluster)
if apierrors.IsConflict(err) {
r.logger.Debugf(ctx, "conflict trying to save object in k8s API concurrently")
r.logger.Debugf(ctx, "canceling resource")
return nil
} else if err != nil {
return microerror.Mask(err)
}
r.logger.Debugf(ctx, "Ensured %s label and 'ownerReference' fields on AzureCluster '%s/%s'", capiv1alpha3.ClusterLabelName, cluster.Namespace, cluster.Spec.InfrastructureRef.Name)
if cluster.Spec.InfrastructureRef != nil && cluster.Spec.InfrastructureRef.APIVersion != "" {
// Correct Cluster.Spec.InfrastructureRef with APIVersion is already set
return nil
}
var infrastructureCRRef *corev1.ObjectReference
{
infrastructureCRRef, err = reference.GetReference(r.scheme, &azureCluster)
if err != nil {
return microerror.Mask(err)
}
}
cluster.Spec.InfrastructureRef = infrastructureCRRef
err = r.ctrlClient.Update(ctx, &cluster)
if apierrors.IsConflict(err) {
r.logger.Debugf(ctx, "conflict trying to save object in k8s API concurrently")
r.logger.Debugf(ctx, "canceling resource")
return nil
} else if err != nil {
return microerror.Mask(err)
}
r.logger.Debugf(ctx, "Ensured 'Spec.InfrastructureRef' fields on Cluster '%s/%s'", cluster.Namespace, cluster.Name)
return nil
}
func (r *Resource) ensureMachinePools(ctx context.Context, cluster capiv1alpha3.Cluster) error {
var err error
o := client.MatchingLabels{
capiv1alpha3.ClusterLabelName: key.ClusterName(&cluster),
}
mpList := new(expcapiv1alpha3.MachinePoolList)
err = r.ctrlClient.List(ctx, mpList, o)
if err != nil {
return microerror.Mask(err)
}
for _, machinePool := range mpList.Items {
if !machinePool.GetDeletionTimestamp().IsZero() {
r.logger.Debugf(ctx, "MachinePool %#q is being deleted, skipping setting owner references", machinePool.Name)
continue
}
r.logger.Debugf(ctx, "Ensuring %s label and 'ownerReference' fields on MachinePool '%s/%s'", capiv1alpha3.ClusterLabelName, machinePool.Namespace, machinePool.Name)
if machinePool.Labels == nil {
machinePool.Labels = make(map[string]string)
}
machinePool.Labels[capiv1alpha3.ClusterLabelName] = cluster.Name
// Set Cluster as owner of MachinePool
err = controllerutil.SetControllerReference(&cluster, &machinePool, r.scheme)
if err != nil {
return microerror.Mask(err)
}
err = r.ctrlClient.Update(ctx, &machinePool)
if apierrors.IsConflict(err) {
r.logger.Debugf(ctx, "conflict trying to save object in k8s API concurrently")
r.logger.Debugf(ctx, "cancelling resource")
return nil
} else if err != nil {
return microerror.Mask(err)
}
r.logger.Debugf(ctx, "Ensured %s label and 'ownerReference' fields on MachinePool '%s/%s'", capiv1alpha3.ClusterLabelName, machinePool.Namespace, machinePool.Name)
}
return nil
}