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daemonset.go
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daemonset.go
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/*
Copyright The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// Code generated by main. DO NOT EDIT.
package v1
import (
"context"
"sync"
"time"
"github.com/rancher/wrangler/v2/pkg/apply"
"github.com/rancher/wrangler/v2/pkg/condition"
"github.com/rancher/wrangler/v2/pkg/generic"
"github.com/rancher/wrangler/v2/pkg/kv"
v1 "k8s.io/api/apps/v1"
"k8s.io/apimachinery/pkg/api/equality"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
)
// DaemonSetController interface for managing DaemonSet resources.
type DaemonSetController interface {
generic.ControllerInterface[*v1.DaemonSet, *v1.DaemonSetList]
}
// DaemonSetClient interface for managing DaemonSet resources in Kubernetes.
type DaemonSetClient interface {
generic.ClientInterface[*v1.DaemonSet, *v1.DaemonSetList]
}
// DaemonSetCache interface for retrieving DaemonSet resources in memory.
type DaemonSetCache interface {
generic.CacheInterface[*v1.DaemonSet]
}
// DaemonSetStatusHandler is executed for every added or modified DaemonSet. Should return the new status to be updated
type DaemonSetStatusHandler func(obj *v1.DaemonSet, status v1.DaemonSetStatus) (v1.DaemonSetStatus, error)
// DaemonSetGeneratingHandler is the top-level handler that is executed for every DaemonSet event. It extends DaemonSetStatusHandler by a returning a slice of child objects to be passed to apply.Apply
type DaemonSetGeneratingHandler func(obj *v1.DaemonSet, status v1.DaemonSetStatus) ([]runtime.Object, v1.DaemonSetStatus, error)
// RegisterDaemonSetStatusHandler configures a DaemonSetController to execute a DaemonSetStatusHandler for every events observed.
// If a non-empty condition is provided, it will be updated in the status conditions for every handler execution
func RegisterDaemonSetStatusHandler(ctx context.Context, controller DaemonSetController, condition condition.Cond, name string, handler DaemonSetStatusHandler) {
statusHandler := &daemonSetStatusHandler{
client: controller,
condition: condition,
handler: handler,
}
controller.AddGenericHandler(ctx, name, generic.FromObjectHandlerToHandler(statusHandler.sync))
}
// RegisterDaemonSetGeneratingHandler configures a DaemonSetController to execute a DaemonSetGeneratingHandler for every events observed, passing the returned objects to the provided apply.Apply.
// If a non-empty condition is provided, it will be updated in the status conditions for every handler execution
func RegisterDaemonSetGeneratingHandler(ctx context.Context, controller DaemonSetController, apply apply.Apply,
condition condition.Cond, name string, handler DaemonSetGeneratingHandler, opts *generic.GeneratingHandlerOptions) {
statusHandler := &daemonSetGeneratingHandler{
DaemonSetGeneratingHandler: handler,
apply: apply,
name: name,
gvk: controller.GroupVersionKind(),
}
if opts != nil {
statusHandler.opts = *opts
}
controller.OnChange(ctx, name, statusHandler.Remove)
RegisterDaemonSetStatusHandler(ctx, controller, condition, name, statusHandler.Handle)
}
type daemonSetStatusHandler struct {
client DaemonSetClient
condition condition.Cond
handler DaemonSetStatusHandler
}
// sync is executed on every resource addition or modification. Executes the configured handlers and sends the updated status to the Kubernetes API
func (a *daemonSetStatusHandler) sync(key string, obj *v1.DaemonSet) (*v1.DaemonSet, error) {
if obj == nil {
return obj, nil
}
origStatus := obj.Status.DeepCopy()
obj = obj.DeepCopy()
newStatus, err := a.handler(obj, obj.Status)
if err != nil {
// Revert to old status on error
newStatus = *origStatus.DeepCopy()
}
if a.condition != "" {
if errors.IsConflict(err) {
a.condition.SetError(&newStatus, "", nil)
} else {
a.condition.SetError(&newStatus, "", err)
}
}
if !equality.Semantic.DeepEqual(origStatus, &newStatus) {
if a.condition != "" {
// Since status has changed, update the lastUpdatedTime
a.condition.LastUpdated(&newStatus, time.Now().UTC().Format(time.RFC3339))
}
var newErr error
obj.Status = newStatus
newObj, newErr := a.client.UpdateStatus(obj)
if err == nil {
err = newErr
}
if newErr == nil {
obj = newObj
}
}
return obj, err
}
type daemonSetGeneratingHandler struct {
DaemonSetGeneratingHandler
apply apply.Apply
opts generic.GeneratingHandlerOptions
gvk schema.GroupVersionKind
name string
seen sync.Map
}
// Remove handles the observed deletion of a resource, cascade deleting every associated resource previously applied
func (a *daemonSetGeneratingHandler) Remove(key string, obj *v1.DaemonSet) (*v1.DaemonSet, error) {
if obj != nil {
return obj, nil
}
obj = &v1.DaemonSet{}
obj.Namespace, obj.Name = kv.RSplit(key, "/")
obj.SetGroupVersionKind(a.gvk)
if a.opts.UniqueApplyForResourceVersion {
a.seen.Delete(key)
}
return nil, generic.ConfigureApplyForObject(a.apply, obj, &a.opts).
WithOwner(obj).
WithSetID(a.name).
ApplyObjects()
}
// Handle executes the configured DaemonSetGeneratingHandler and pass the resulting objects to apply.Apply, finally returning the new status of the resource
func (a *daemonSetGeneratingHandler) Handle(obj *v1.DaemonSet, status v1.DaemonSetStatus) (v1.DaemonSetStatus, error) {
if !obj.DeletionTimestamp.IsZero() {
return status, nil
}
objs, newStatus, err := a.DaemonSetGeneratingHandler(obj, status)
if err != nil {
return newStatus, err
}
if !a.isNewResourceVersion(obj) {
return newStatus, nil
}
err = generic.ConfigureApplyForObject(a.apply, obj, &a.opts).
WithOwner(obj).
WithSetID(a.name).
ApplyObjects(objs...)
if err != nil {
return newStatus, err
}
a.storeResourceVersion(obj)
return newStatus, nil
}
// isNewResourceVersion detects if a specific resource version was already successfully processed.
// Only used if UniqueApplyForResourceVersion is set in generic.GeneratingHandlerOptions
func (a *daemonSetGeneratingHandler) isNewResourceVersion(obj *v1.DaemonSet) bool {
if !a.opts.UniqueApplyForResourceVersion {
return true
}
// Apply once per resource version
key := obj.Namespace + "/" + obj.Name
previous, ok := a.seen.Load(key)
return !ok || previous != obj.ResourceVersion
}
// storeResourceVersion keeps track of the latest resource version of an object for which Apply was executed
// Only used if UniqueApplyForResourceVersion is set in generic.GeneratingHandlerOptions
func (a *daemonSetGeneratingHandler) storeResourceVersion(obj *v1.DaemonSet) {
if !a.opts.UniqueApplyForResourceVersion {
return
}
key := obj.Namespace + "/" + obj.Name
a.seen.Store(key, obj.ResourceVersion)
}