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Merge pull request #328 from mengqiy/simplifywhif
⚠️ Simplify the webhook interface
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Original file line number | Diff line number | Diff line change |
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/* | ||
Copyright 2019 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. | ||
*/ | ||
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package main | ||
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import ( | ||
"context" | ||
"math/rand" | ||
"os" | ||
"time" | ||
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corev1 "k8s.io/api/core/v1" | ||
apierrors "k8s.io/apimachinery/pkg/api/errors" | ||
"k8s.io/apimachinery/pkg/runtime" | ||
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp" | ||
ctrl "sigs.k8s.io/controller-runtime" | ||
api "sigs.k8s.io/controller-runtime/examples/crd/pkg" | ||
"sigs.k8s.io/controller-runtime/pkg/client" | ||
"sigs.k8s.io/controller-runtime/pkg/log/zap" | ||
) | ||
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var ( | ||
setupLog = ctrl.Log.WithName("setup") | ||
recLog = ctrl.Log.WithName("reconciler") | ||
) | ||
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type reconciler struct { | ||
client.Client | ||
scheme *runtime.Scheme | ||
} | ||
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func (r *reconciler) Reconcile(req ctrl.Request) (ctrl.Result, error) { | ||
log := recLog.WithValues("chaospod", req.NamespacedName) | ||
log.V(1).Info("reconciling chaos pod") | ||
ctx := context.Background() | ||
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var chaospod api.ChaosPod | ||
if err := r.Get(ctx, req.NamespacedName, &chaospod); err != nil { | ||
log.Error(err, "unable to get chaosctl") | ||
return ctrl.Result{}, err | ||
} | ||
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var pod corev1.Pod | ||
podFound := true | ||
if err := r.Get(ctx, req.NamespacedName, &pod); err != nil { | ||
if !apierrors.IsNotFound(err) { | ||
log.Error(err, "unable to get pod") | ||
return ctrl.Result{}, err | ||
} | ||
podFound = false | ||
} | ||
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if podFound { | ||
shouldStop := chaospod.Spec.NextStop.Time.Before(time.Now()) | ||
if !shouldStop { | ||
return ctrl.Result{RequeueAfter: chaospod.Spec.NextStop.Sub(time.Now()) + 1*time.Second}, nil | ||
} | ||
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if err := r.Delete(ctx, &pod); err != nil { | ||
log.Error(err, "unable to delete pod") | ||
return ctrl.Result{}, err | ||
} | ||
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return ctrl.Result{Requeue: true}, nil | ||
} | ||
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templ := chaospod.Spec.Template.DeepCopy() | ||
pod.ObjectMeta = templ.ObjectMeta | ||
pod.Name = req.Name | ||
pod.Namespace = req.Namespace | ||
pod.Spec = templ.Spec | ||
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if err := ctrl.SetControllerReference(&chaospod, &pod, r.scheme); err != nil { | ||
log.Error(err, "unable to set pod's owner reference") | ||
return ctrl.Result{}, err | ||
} | ||
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if err := r.Create(ctx, &pod); err != nil { | ||
log.Error(err, "unable to create pod") | ||
return ctrl.Result{}, err | ||
} | ||
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chaospod.Spec.NextStop.Time = time.Now().Add(time.Duration(10*(rand.Int63n(2)+1)) * time.Second) | ||
chaospod.Status.LastRun = pod.CreationTimestamp | ||
if err := r.Update(ctx, &chaospod); err != nil { | ||
log.Error(err, "unable to update chaosctl status") | ||
return ctrl.Result{}, err | ||
} | ||
return ctrl.Result{}, nil | ||
} | ||
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func main() { | ||
ctrl.SetLogger(zap.Logger(true)) | ||
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mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{}) | ||
if err != nil { | ||
setupLog.Error(err, "unable to start manager") | ||
os.Exit(1) | ||
} | ||
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// in a real controller, we'd create a new scheme for this | ||
err = api.AddToScheme(mgr.GetScheme()) | ||
if err != nil { | ||
setupLog.Error(err, "unable to add scheme") | ||
os.Exit(1) | ||
} | ||
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err = ctrl.NewControllerManagedBy(mgr). | ||
For(&api.ChaosPod{}). | ||
Owns(&corev1.Pod{}). | ||
Complete(&reconciler{ | ||
Client: mgr.GetClient(), | ||
scheme: mgr.GetScheme(), | ||
}) | ||
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if err != nil { | ||
setupLog.Error(err, "unable to create controller") | ||
os.Exit(1) | ||
} | ||
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setupLog.Info("starting manager") | ||
if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil { | ||
setupLog.Error(err, "problem running manager") | ||
os.Exit(1) | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,23 @@ | ||
/* | ||
Copyright 2018 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. | ||
*/ | ||
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package pkg | ||
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import ( | ||
logf "sigs.k8s.io/controller-runtime/pkg/runtime/log" | ||
) | ||
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var log = logf.Log.WithName("chaospod-resource") |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,119 @@ | ||
/* | ||
Copyright 2018 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. | ||
*/ | ||
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package pkg | ||
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import ( | ||
"fmt" | ||
"time" | ||
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corev1 "k8s.io/api/core/v1" | ||
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
"k8s.io/apimachinery/pkg/runtime" | ||
"k8s.io/apimachinery/pkg/runtime/schema" | ||
"sigs.k8s.io/controller-runtime/pkg/scheme" | ||
"sigs.k8s.io/controller-runtime/pkg/webhook" | ||
) | ||
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// ChaosPodSpec defines the desired state of ChaosPod | ||
type ChaosPodSpec struct { | ||
Template corev1.PodTemplateSpec `json:"template"` | ||
// +optional | ||
NextStop metav1.Time `json:"nextStop,omitempty"` | ||
} | ||
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// ChaosPodStatus defines the observed state of ChaosPod. | ||
// It should always be reconstructable from the state of the cluster and/or outside world. | ||
type ChaosPodStatus struct { | ||
LastRun metav1.Time `json:"lastRun,omitempty"` | ||
} | ||
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// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object | ||
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// ChaosPod is the Schema for the randomjobs API | ||
// +kubebuilder:printcolumn:name="next stop",type="string",JSONPath=".spec.nextStop",format="date" | ||
// +kubebuilder:printcolumn:name="last run",type="string",JSONPath=".status.lastRun",format="date" | ||
// +k8s:openapi-gen=true | ||
type ChaosPod struct { | ||
metav1.TypeMeta `json:",inline"` | ||
metav1.ObjectMeta `json:"metadata,omitempty"` | ||
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Spec ChaosPodSpec `json:"spec,omitempty"` | ||
Status ChaosPodStatus `json:"status,omitempty"` | ||
} | ||
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// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object | ||
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// ChaosPodList contains a list of ChaosPod | ||
type ChaosPodList struct { | ||
metav1.TypeMeta `json:",inline"` | ||
metav1.ListMeta `json:"metadata,omitempty"` | ||
Items []ChaosPod `json:"items"` | ||
} | ||
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// ValidateCreate implements webhookutil.validator so a webhook will be registered for the type | ||
func (c *ChaosPod) ValidateCreate() error { | ||
log.Info("validate create", "name", c.Name) | ||
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if c.Spec.NextStop.Before(&metav1.Time{Time: time.Now()}) { | ||
return fmt.Errorf(".spec.nextStop must be later than current time") | ||
} | ||
return nil | ||
} | ||
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// ValidateUpdate implements webhookutil.validator so a webhook will be registered for the type | ||
func (c *ChaosPod) ValidateUpdate(old runtime.Object) error { | ||
log.Info("validate update", "name", c.Name) | ||
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if c.Spec.NextStop.Before(&metav1.Time{Time: time.Now()}) { | ||
return fmt.Errorf(".spec.nextStop must be later than current time") | ||
} | ||
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oldC, ok := old.(*ChaosPod) | ||
if !ok { | ||
return fmt.Errorf("expect old object to be a %T instead of %T", oldC, old) | ||
} | ||
if c.Spec.NextStop.After(oldC.Spec.NextStop.Add(time.Hour)) { | ||
return fmt.Errorf("it is not allowed to delay.spec.nextStop for more than 1 hour") | ||
} | ||
return nil | ||
} | ||
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var _ webhook.Defaulter = &ChaosPod{} | ||
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// Default implements webhookutil.defaulter so a webhook will be registered for the type | ||
func (c *ChaosPod) Default() { | ||
log.Info("default", "name", c.Name) | ||
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if c.Spec.NextStop.Before(&metav1.Time{Time: time.Now()}) { | ||
c.Spec.NextStop = metav1.Time{Time: time.Now().Add(time.Minute)} | ||
} | ||
} | ||
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func init() { | ||
SchemeBuilder.Register(&ChaosPod{}, &ChaosPodList{}) | ||
} | ||
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var ( | ||
// SchemeGroupVersion is group version used to register these objects | ||
SchemeGroupVersion = schema.GroupVersion{Group: "chaosapps.metamagical.io", Version: "v1"} | ||
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// SchemeBuilder is used to add go types to the GroupVersionKind scheme | ||
SchemeBuilder = &scheme.Builder{GroupVersion: SchemeGroupVersion} | ||
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// AddToScheme is required by pkg/client/... | ||
AddToScheme = SchemeBuilder.AddToScheme | ||
) |
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