impl.go

Documentation: github.com/chaos-mesh/chaos-mesh/controllers/chaosimpl/stresschaos

     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 stresschaos
    17  
    18  import (
    19  	"context"
    20  	"time"
    21  
    22  	"github.com/go-logr/logr"
    23  	"go.uber.org/fx"
    24  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    25  	"sigs.k8s.io/controller-runtime/pkg/client"
    26  
    27  	"github.com/chaos-mesh/chaos-mesh/api/v1alpha1"
    28  	impltypes "github.com/chaos-mesh/chaos-mesh/controllers/chaosimpl/types"
    29  	"github.com/chaos-mesh/chaos-mesh/controllers/chaosimpl/utils"
    30  	pb "github.com/chaos-mesh/chaos-mesh/pkg/chaosdaemon/pb"
    31  )
    32  
    33  var _ impltypes.ChaosImpl = (*Impl)(nil)
    34  
    35  type Impl struct {
    36  	client.Client
    37  
    38  	Log logr.Logger
    39  
    40  	decoder *utils.ContainerRecordDecoder
    41  }
    42  
    43  func (impl *Impl) Apply(ctx context.Context, index int, records []*v1alpha1.Record, obj v1alpha1.InnerObject) (v1alpha1.Phase, error) {
    44  	decodedContainer, err := impl.decoder.DecodeContainerRecord(ctx, records[index])
    45  	pbClient := decodedContainer.PbClient
    46  	containerId := decodedContainer.ContainerId
    47  	if pbClient != nil {
    48  		defer pbClient.Close()
    49  	}
    50  	if err != nil {
    51  		return v1alpha1.NotInjected, err
    52  	}
    53  
    54  	stresschaos := obj.(*v1alpha1.StressChaos)
    55  	if stresschaos.Status.Instances == nil {
    56  		stresschaos.Status.Instances = make(map[string]v1alpha1.StressInstance)
    57  	}
    58  	_, ok := stresschaos.Status.Instances[records[index].Id]
    59  	if ok {
    60  		impl.Log.Info("an stress-ng instance is running for this pod")
    61  		return v1alpha1.Injected, nil
    62  	}
    63  
    64  	stressors := stresschaos.Spec.StressngStressors
    65  	if len(stressors) == 0 {
    66  		stressors, err = stresschaos.Spec.Stressors.Normalize()
    67  		if err != nil {
    68  			impl.Log.Info("fail to ")
    69  			// TODO: add an event here
    70  			return v1alpha1.NotInjected, err
    71  		}
    72  	}
    73  	res, err := pbClient.ExecStressors(ctx, &pb.ExecStressRequest{
    74  		Scope:     pb.ExecStressRequest_CONTAINER,
    75  		Target:    containerId,
    76  		Stressors: stressors,
    77  		EnterNS:   true,
    78  	})
    79  	if err != nil {
    80  		return v1alpha1.NotInjected, err
    81  	}
    82  
    83  	// TODO: support custom status
    84  	stresschaos.Status.Instances[records[index].Id] = v1alpha1.StressInstance{
    85  		UID: res.Instance,
    86  		StartTime: &metav1.Time{
    87  			Time: time.Unix(res.StartTime/1000, (res.StartTime%1000)*int64(time.Millisecond)),
    88  		},
    89  	}
    90  
    91  	return v1alpha1.Injected, nil
    92  }
    93  
    94  func (impl *Impl) Recover(ctx context.Context, index int, records []*v1alpha1.Record, obj v1alpha1.InnerObject) (v1alpha1.Phase, error) {
    95  	decodedContainer, err := impl.decoder.DecodeContainerRecord(ctx, records[index])
    96  	pbClient := decodedContainer.PbClient
    97  	if pbClient != nil {
    98  		defer pbClient.Close()
    99  	}
   100  	if err != nil {
   101  		if utils.IsFailToGet(err) {
   102  			// pretend the disappeared container has been recovered
   103  			return v1alpha1.NotInjected, nil
   104  		}
   105  		return v1alpha1.Injected, err
   106  	}
   107  
   108  	stresschaos := obj.(*v1alpha1.StressChaos)
   109  	if stresschaos.Status.Instances == nil {
   110  		return v1alpha1.NotInjected, nil
   111  	}
   112  	instance, ok := stresschaos.Status.Instances[records[index].Id]
   113  	if !ok {
   114  		impl.Log.Info("Pod seems already recovered", "pod", decodedContainer.Pod.UID)
   115  		return v1alpha1.NotInjected, nil
   116  	}
   117  	if _, err = pbClient.CancelStressors(ctx, &pb.CancelStressRequest{
   118  		Instance:  instance.UID,
   119  		StartTime: instance.StartTime.UnixNano() / int64(time.Millisecond),
   120  	}); err != nil {
   121  		// TODO: check whether the erorr still exists
   122  		return v1alpha1.Injected, nil
   123  	}
   124  	delete(stresschaos.Status.Instances, records[index].Id)
   125  	return v1alpha1.NotInjected, nil
   126  }
   127  
   128  func NewImpl(c client.Client, log logr.Logger, decoder *utils.ContainerRecordDecoder) *impltypes.ChaosImplPair {
   129  	return &impltypes.ChaosImplPair{
   130  		Name:   "stresschaos",
   131  		Object: &v1alpha1.StressChaos{},
   132  		Impl: &Impl{
   133  			Client:  c,
   134  			Log:     log.WithName("stresschaos"),
   135  			decoder: decoder,
   136  		},
   137  	}
   138  }
   139  
   140  var Module = fx.Provide(
   141  	fx.Annotated{
   142  		Group:  "impl",
   143  		Target: NewImpl,
   144  	},
   145  )
   146