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impl.go
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/
impl.go
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// Copyright 2021 Chaos Mesh 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.
//
package stresschaos
import (
"context"
"time"
"github.com/go-logr/logr"
"github.com/pkg/errors"
"go.uber.org/fx"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/chaos-mesh/chaos-mesh/api/v1alpha1"
impltypes "github.com/chaos-mesh/chaos-mesh/controllers/chaosimpl/types"
"github.com/chaos-mesh/chaos-mesh/controllers/chaosimpl/utils"
"github.com/chaos-mesh/chaos-mesh/pkg/chaosdaemon/pb"
)
var _ impltypes.ChaosImpl = (*Impl)(nil)
type Impl struct {
client.Client
Log logr.Logger
decoder *utils.ContainerRecordDecoder
}
func (impl *Impl) Apply(ctx context.Context, index int, records []*v1alpha1.Record, obj v1alpha1.InnerObject) (v1alpha1.Phase, error) {
decodedContainer, err := impl.decoder.DecodeContainerRecord(ctx, records[index], obj)
pbClient := decodedContainer.PbClient
containerId := decodedContainer.ContainerId
if pbClient != nil {
defer pbClient.Close()
}
if err != nil {
return v1alpha1.NotInjected, err
}
stresschaos := obj.(*v1alpha1.StressChaos)
if stresschaos.Status.Instances == nil {
stresschaos.Status.Instances = make(map[string]v1alpha1.StressInstance)
}
_, ok := stresschaos.Status.Instances[records[index].Id]
if ok {
impl.Log.Info("an stress-ng instance is running for this pod")
return v1alpha1.Injected, nil
}
stressors := stresschaos.Spec.StressngStressors
cpuStressors := ""
memoryStressors := ""
if len(stressors) == 0 {
cpuStressors, memoryStressors, err = stresschaos.Spec.Stressors.Normalize()
if err != nil {
impl.Log.Info("fail to ")
// TODO: add an event here
return v1alpha1.NotInjected, err
}
}
req := pb.ExecStressRequest{
Scope: pb.ExecStressRequest_CONTAINER,
Target: containerId,
CpuStressors: cpuStressors,
MemoryStressors: memoryStressors,
EnterNS: true,
}
if stresschaos.Spec.Stressors.MemoryStressor != nil {
req.OomScoreAdj = int32(stresschaos.Spec.Stressors.MemoryStressor.OOMScoreAdj)
}
res, err := pbClient.ExecStressors(ctx, &req)
if err != nil {
return v1alpha1.NotInjected, err
}
// TODO: support custom status
stresschaos.Status.Instances[records[index].Id] = v1alpha1.StressInstance{
UID: res.CpuInstance,
StartTime: &metav1.Time{
Time: time.Unix(res.CpuStartTime/1000, (res.CpuStartTime%1000)*int64(time.Millisecond)),
},
MemoryUID: res.MemoryInstance,
MemoryStartTime: &metav1.Time{
Time: time.Unix(res.MemoryStartTime/1000, (res.MemoryStartTime%1000)*int64(time.Millisecond)),
},
}
return v1alpha1.Injected, nil
}
func (impl *Impl) Recover(ctx context.Context, index int, records []*v1alpha1.Record, obj v1alpha1.InnerObject) (v1alpha1.Phase, error) {
decodedContainer, err := impl.decoder.DecodeContainerRecord(ctx, records[index], obj)
pbClient := decodedContainer.PbClient
if pbClient != nil {
defer pbClient.Close()
}
if err != nil {
if errors.Is(err, utils.ErrContainerNotFound) {
// pretend the disappeared container has been recovered
return v1alpha1.NotInjected, nil
}
return v1alpha1.Injected, err
}
stresschaos := obj.(*v1alpha1.StressChaos)
if stresschaos.Status.Instances == nil {
return v1alpha1.NotInjected, nil
}
instance, ok := stresschaos.Status.Instances[records[index].Id]
if !ok {
impl.Log.Info("Pod seems already recovered", "pod", decodedContainer.Pod.UID)
return v1alpha1.NotInjected, nil
}
req := &pb.CancelStressRequest{
CpuInstance: instance.UID,
MemoryInstance: instance.MemoryUID,
}
if instance.StartTime != nil {
req.CpuStartTime = instance.StartTime.UnixNano() / int64(time.Millisecond)
}
if instance.MemoryStartTime != nil {
req.MemoryStartTime = instance.MemoryStartTime.UnixNano() / int64(time.Millisecond)
}
if _, err = pbClient.CancelStressors(ctx, req); err != nil {
impl.Log.Error(err, "cancel stressors")
return v1alpha1.Injected, nil
}
delete(stresschaos.Status.Instances, records[index].Id)
return v1alpha1.NotInjected, nil
}
func NewImpl(c client.Client, log logr.Logger, decoder *utils.ContainerRecordDecoder) *impltypes.ChaosImplPair {
return &impltypes.ChaosImplPair{
Name: "stresschaos",
Object: &v1alpha1.StressChaos{},
Impl: &Impl{
Client: c,
Log: log.WithName("stresschaos"),
decoder: decoder,
},
}
}
var Module = fx.Provide(
fx.Annotated{
Group: "impl",
Target: NewImpl,
},
)