generated from replicatedhq/krew-plugin-template
/
crds.go
103 lines (92 loc) · 3.15 KB
/
crds.go
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package plugin
import (
"fmt"
"github.com/pkg/errors"
apixv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
apixv1client "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset/typed/apiextensions/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/fields"
dynamic "k8s.io/client-go/dynamic"
"sync"
)
func deleteClusterCrds(apixClient *apixv1client.ApiextensionsV1Client, dynamicClient dynamic.Interface, errorCh chan<- error) {
ctx, cancel := createCtx()
defer cancel()
waitGroup := sync.WaitGroup{}
crds, err := apixClient.CustomResourceDefinitions().List(ctx, metav1.ListOptions{})
if err != nil {
errorCh <- errors.Wrap(err, "failed to list cluster-wide crds")
return
}
for _, crd := range crds.Items {
waitGroup.Add(1)
name := crd.Name
crd := crd
go func() {
defer waitGroup.Done()
deleteCustomResources(&dynamicClient, crd, "", errorCh)
err := apixClient.CustomResourceDefinitions().Delete(ctx, name, deletePolicy)
if err != nil {
errorCh <- errors.Wrap(err, fmt.Sprintf("failed to delete crd %s", name))
}
}()
}
waitGroup.Wait()
}
func deleteNamespacedCrds(apixClient *apixv1client.ApiextensionsV1Client, dynamicClient dynamic.Interface, namespace string, errorCh chan<- error) {
ctx, cancel := createCtx()
defer cancel()
waitGroup := sync.WaitGroup{}
crds, err := apixClient.CustomResourceDefinitions().List(ctx, metav1.ListOptions{
FieldSelector: fields.SelectorFromSet(fields.Set{"metadata.namespace": namespace}).String(),
})
if err != nil {
errorCh <- errors.Wrap(err, fmt.Sprintf("failed to list namespaced crds in: %s", namespace))
return
}
for _, crd := range crds.Items {
waitGroup.Add(1)
name := crd.Name
crd := crd
go func() {
defer waitGroup.Done()
deleteCustomResources(&dynamicClient, crd, namespace, errorCh)
err = apixClient.CustomResourceDefinitions().Delete(ctx, name, deletePolicy)
if err != nil {
errorCh <- errors.Wrap(err, fmt.Sprintf("failed to delete crd %s", name))
}
}()
}
waitGroup.Wait()
}
func deleteCustomResources(dynamicClient *dynamic.Interface, crd apixv1.CustomResourceDefinition, namespace string, errorCh chan<- error) {
name := crd.Name
ctx, cancel := createCtx()
defer cancel()
crdGvr := crd.GroupVersionKind().GroupVersion().WithResource(name)
crApi := (*dynamicClient).Resource(crdGvr)
customResources, err := crApi.List(ctx, metav1.ListOptions{})
if err != nil {
var errorMsg string
if namespace != "" {
errorMsg = fmt.Sprintf("failed to list CustomResources for crd: %s in namespace: %s", name, namespace)
} else {
errorMsg = fmt.Sprintf("failed to list CustomResources for crd: %s", name)
}
errorCh <- errors.Wrap(err, errorMsg)
return
}
crWaitGroup := sync.WaitGroup{}
for _, customResource := range customResources.Items {
crWaitGroup.Add(1)
customResource := customResource
go func() {
defer crWaitGroup.Done()
err := crApi.Delete(ctx, customResource.GetName(), deletePolicy)
if err != nil {
errorCh <- errors.Wrap(err, fmt.Sprintf("failed to delete CustomResource %s for crd: %s in namespace: %s", customResource.GetName(), name, namespace))
}
}()
}
crWaitGroup.Wait()
}