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sync_namespaces.go
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/
sync_namespaces.go
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// Copyright (C) 2021 ScyllaDB
package nodeconfig
import (
"context"
"fmt"
"github.com/scylladb/scylla-operator/pkg/resourceapply"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
utilerrors "k8s.io/apimachinery/pkg/util/errors"
)
func (ncc *Controller) makeNamespaces() []*corev1.Namespace {
namespaces := []*corev1.Namespace{
makeScyllaOperatorNodeTuningNamespace(),
}
return namespaces
}
func (ncc *Controller) pruneNamespaces(ctx context.Context, requiredNamespaces []*corev1.Namespace, namespaces map[string]*corev1.Namespace) error {
var errs []error
for _, ns := range namespaces {
if ns.DeletionTimestamp != nil {
continue
}
isRequired := false
for _, req := range requiredNamespaces {
if ns.Name == req.Name {
isRequired = true
break
}
}
if isRequired {
continue
}
propagationPolicy := metav1.DeletePropagationBackground
err := ncc.kubeClient.CoreV1().Namespaces().Delete(ctx, ns.Name, metav1.DeleteOptions{
Preconditions: &metav1.Preconditions{
UID: &ns.UID,
},
PropagationPolicy: &propagationPolicy,
})
if err != nil {
errs = append(errs, err)
continue
}
}
return utilerrors.NewAggregate(errs)
}
func (ncc *Controller) syncNamespaces(ctx context.Context, namespaces map[string]*corev1.Namespace) error {
requiredNamespaces := ncc.makeNamespaces()
// Delete any excessive Namespaces.
// Delete has to be the first action to avoid getting stuck on quota.
err := ncc.pruneNamespaces(ctx, requiredNamespaces, namespaces)
if err != nil {
return fmt.Errorf("can't delete Namespace(s): %w", err)
}
var errs []error
for _, ns := range requiredNamespaces {
_, _, err := resourceapply.ApplyNamespace(ctx, ncc.kubeClient.CoreV1(), ncc.namespaceLister, ncc.eventRecorder, ns, resourceapply.ApplyOptions{
AllowMissingControllerRef: true,
})
if err != nil {
errs = append(errs, fmt.Errorf("can't create missing Namespace: %w", err))
continue
}
}
return utilerrors.NewAggregate(errs)
}