controller.go

Documentation: github.com/chaos-mesh/chaos-mesh/controllers/common/condition

     1  // Copyright 2021 Chaos Mesh Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  // http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  //
    15  
    16  package condition
    17  
    18  import (
    19  	"context"
    20  	"reflect"
    21  
    22  	"github.com/go-logr/logr"
    23  	corev1 "k8s.io/api/core/v1"
    24  	apierrors "k8s.io/apimachinery/pkg/api/errors"
    25  	"k8s.io/apimachinery/pkg/runtime"
    26  	"k8s.io/client-go/tools/record"
    27  	"k8s.io/client-go/util/retry"
    28  	ctrl "sigs.k8s.io/controller-runtime"
    29  	"sigs.k8s.io/controller-runtime/pkg/client"
    30  
    31  	"github.com/chaos-mesh/chaos-mesh/api/v1alpha1"
    32  )
    33  
    34  // Reconciler for common chaos
    35  type Reconciler struct {
    36  	// Object is used to mark the target type of this Reconciler
    37  	Object runtime.Object
    38  
    39  	// Client is used to operate on the Kubernetes cluster
    40  	client.Client
    41  
    42  	Recorder record.EventRecorder
    43  
    44  	Log logr.Logger
    45  }
    46  
    47  type StatusAndReason struct {
    48  	Status corev1.ConditionStatus
    49  	Reason string
    50  }
    51  
    52  func (r *Reconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
    53  	obj := r.Object.DeepCopyObject().(v1alpha1.InnerObjectWithSelector)
    54  	if err := r.Client.Get(context.TODO(), req.NamespacedName, obj); err != nil {
    55  		if apierrors.IsNotFound(err) {
    56  			r.Log.Info("chaos not found")
    57  		} else {
    58  			// TODO: handle this error
    59  			r.Log.Error(err, "unable to get chaos")
    60  		}
    61  		return ctrl.Result{}, nil
    62  	}
    63  
    64  	updateError := retry.RetryOnConflict(retry.DefaultBackoff, func() error {
    65  		conditionMap := make(map[v1alpha1.ChaosConditionType]StatusAndReason)
    66  		for _, c := range obj.GetStatus().Conditions {
    67  			conditionMap[c.Type] = StatusAndReason{
    68  				Status: c.Status,
    69  				Reason: c.Reason,
    70  			}
    71  		}
    72  
    73  		newConditionMap := make(map[v1alpha1.ChaosConditionType]StatusAndReason)
    74  		if obj.GetStatus().Experiment.Records != nil {
    75  			newConditionMap[v1alpha1.ConditionSelected] = StatusAndReason{
    76  				Status: corev1.ConditionTrue,
    77  			}
    78  		} else {
    79  			newConditionMap[v1alpha1.ConditionSelected] = StatusAndReason{
    80  				Status: corev1.ConditionFalse,
    81  			}
    82  		}
    83  
    84  		allInjected := corev1.ConditionTrue
    85  		allRecovered := corev1.ConditionTrue
    86  		for _, record := range obj.GetStatus().Experiment.Records {
    87  			if record.Phase != v1alpha1.NotInjected {
    88  				allRecovered = corev1.ConditionFalse
    89  			}
    90  
    91  			if record.Phase != v1alpha1.Injected {
    92  				allInjected = corev1.ConditionFalse
    93  			}
    94  		}
    95  		newConditionMap[v1alpha1.ConditionAllInjected] = StatusAndReason{
    96  			Status: allInjected,
    97  		}
    98  		newConditionMap[v1alpha1.ConditionAllRecovered] = StatusAndReason{
    99  			Status: allRecovered,
   100  		}
   101  
   102  		if obj.IsPaused() {
   103  			newConditionMap[v1alpha1.ConditionPaused] = StatusAndReason{
   104  				Status: corev1.ConditionTrue,
   105  			}
   106  		} else {
   107  			newConditionMap[v1alpha1.ConditionPaused] = StatusAndReason{
   108  				Status: corev1.ConditionFalse,
   109  			}
   110  		}
   111  
   112  		if !reflect.DeepEqual(newConditionMap, conditionMap) {
   113  			conditions := make([]v1alpha1.ChaosCondition, 0, 5)
   114  			for k, v := range newConditionMap {
   115  				conditions = append(conditions, v1alpha1.ChaosCondition{
   116  					Type:   k,
   117  					Status: v.Status,
   118  					Reason: v.Reason,
   119  				})
   120  			}
   121  
   122  			r.Log.Info("updating conditions", "conditions", conditions)
   123  			obj := r.Object.DeepCopyObject().(v1alpha1.InnerObjectWithSelector)
   124  
   125  			if err := r.Client.Get(context.TODO(), req.NamespacedName, obj); err != nil {
   126  				r.Log.Error(err, "unable to get chaos")
   127  				return err
   128  			}
   129  
   130  			obj.GetStatus().Conditions = conditions
   131  			return r.Client.Update(context.TODO(), obj)
   132  		}
   133  
   134  		return nil
   135  	})
   136  
   137  	if updateError != nil {
   138  		r.Log.Error(updateError, "fail to update")
   139  		r.Recorder.Eventf(obj, "Normal", "Failed", "Failed to update conditions: %s", updateError.Error())
   140  		return ctrl.Result{}, nil
   141  	}
   142  	return ctrl.Result{}, nil
   143  }
   144