forked from rancher/cluster-controller
/
cluster_scoped_gc.go
140 lines (120 loc) · 3.78 KB
/
cluster_scoped_gc.go
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package controller
import (
"context"
"strings"
"github.com/rancher/norman/clientbase"
"github.com/rancher/norman/lifecycle"
"github.com/rancher/types/apis/management.cattle.io/v3"
"github.com/rancher/types/config"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/tools/cache"
)
const (
prtbByClusterIndex = "managment.cattle.io/prtb-by-cluster"
)
func registerClusterScopedGC(ctx context.Context, management *config.ManagementContext) {
informer := management.Management.ProjectRoleTemplateBindings("").Controller().Informer()
indexers := map[string]cache.IndexFunc{
prtbByClusterIndex: prtbByCluster,
}
informer.AddIndexers(indexers)
gc := &gcLifecycle{
rtLister: management.Management.RoleTemplates("").Controller().Lister(),
projectLister: management.Management.Projects("").Controller().Lister(),
crtbLister: management.Management.ClusterRoleTemplateBindings("").Controller().Lister(),
prtbIndexer: informer.GetIndexer(),
mgmt: management,
}
management.Management.Clusters("").AddLifecycle("cluster-scoped-gc", gc)
}
type gcLifecycle struct {
projectLister v3.ProjectLister
crtbLister v3.ClusterRoleTemplateBindingLister
prtbIndexer cache.Indexer
rtLister v3.RoleTemplateLister
mgmt *config.ManagementContext
}
func (c *gcLifecycle) Create(obj *v3.Cluster) (*v3.Cluster, error) {
return obj, nil
}
func (c *gcLifecycle) Updated(obj *v3.Cluster) (*v3.Cluster, error) {
return nil, nil
}
func cleanFinalizers(clusterName string, object runtime.Object, client *clientbase.ObjectClient) error {
object = object.DeepCopyObject()
modified := false
md, err := meta.Accessor(object)
if err != nil {
return err
}
finalizers := md.GetFinalizers()
for i := len(finalizers) - 1; i >= 0; i-- {
f := finalizers[i]
if strings.HasPrefix(f, lifecycle.ScopedFinalizerKey) && strings.HasSuffix(f, "_"+clusterName) {
finalizers = append(finalizers[:i], finalizers[i+1:]...)
modified = true
}
}
if modified {
md.SetFinalizers(finalizers)
_, err := client.Update(md.GetName(), object)
return err
}
return nil
}
func (c *gcLifecycle) Remove(cluster *v3.Cluster) (*v3.Cluster, error) {
rts, err := c.rtLister.List("", labels.Everything())
if err != nil {
return cluster, err
}
oClient := c.mgmt.Management.RoleTemplates("").ObjectClient()
for _, rt := range rts {
if err := cleanFinalizers(cluster.Name, rt, oClient); err != nil {
return cluster, err
}
}
projects, err := c.projectLister.List(cluster.Name, labels.Everything())
if err != nil {
return cluster, err
}
oClient = c.mgmt.Management.Projects(cluster.Name).ObjectClient()
for _, p := range projects {
if err := cleanFinalizers(cluster.Name, p, oClient); err != nil {
return cluster, err
}
}
crtbs, err := c.crtbLister.List(cluster.Name, labels.Everything())
if err != nil {
return cluster, err
}
oClient = c.mgmt.Management.ClusterRoleTemplateBindings("").ObjectClient()
for _, p := range crtbs {
if err := cleanFinalizers(cluster.Name, p, oClient); err != nil {
return cluster, err
}
}
prtbs, err := c.prtbIndexer.ByIndex(prtbByClusterIndex, cluster.Name)
if err != nil {
return cluster, err
}
for _, pr := range prtbs {
prtb, _ := pr.(*v3.ProjectRoleTemplateBinding)
oClient = c.mgmt.Management.ProjectRoleTemplateBindings(prtb.Namespace).ObjectClient()
if err := cleanFinalizers(cluster.Name, prtb, oClient); err != nil {
return cluster, err
}
}
return nil, nil
}
func prtbByCluster(obj interface{}) ([]string, error) {
prtb, ok := obj.(*v3.ProjectRoleTemplateBinding)
if !ok {
return []string{}, nil
}
if parts := strings.SplitN(prtb.ProjectName, ":", 2); len(parts) == 2 && len(parts[1]) > 0 {
return []string{parts[0]}, nil
}
return []string{}, nil
}