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manager.go
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/
manager.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 podhttpchaosmanager
import (
"context"
"github.com/go-logr/logr"
"github.com/pkg/errors"
v1 "k8s.io/api/core/v1"
k8sError "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/util/retry"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/chaos-mesh/chaos-mesh/api/v1alpha1"
)
var (
// ErrPodNotFound means operate pod may be deleted(almostly)
ErrPodNotFound = errors.New("pod not found")
// ErrPodNotRunning means operate pod may be not working
// and it's non-sense to make changes on it.
ErrPodNotRunning = errors.New("pod not running")
)
// PodHttpManager will save all the related podhttpchaos
type PodHttpManager struct {
Source string
Log logr.Logger
client.Client
client.Reader
scheme *runtime.Scheme
Key types.NamespacedName
T *PodHttpTransaction
}
// CommitResponse is a tuple (Key, Err)
type CommitResponse struct {
Key types.NamespacedName
Err error
}
// Commit will update all modifications to the cluster
func (m *PodHttpManager) Commit(ctx context.Context) (int64, error) {
m.Log.Info("running modification on pod", "key", m.Key, "modification", m.T)
updateError := retry.RetryOnConflict(retry.DefaultRetry, func() error {
chaos := &v1alpha1.PodHttpChaos{}
err := m.Client.Get(ctx, m.Key, chaos)
if err != nil {
if !k8sError.IsNotFound(err) {
m.Log.Error(err, "error while getting podhttpchaos")
return err
}
err := m.CreateNewPodHttpChaos(ctx)
if err != nil {
m.Log.Error(err, "error while creating new podhttpchaos")
return err
}
return nil
}
err = m.T.Apply(chaos)
if err != nil {
m.Log.Error(err, "error while applying transactions", "transaction", m.T)
return err
}
return m.Client.Update(ctx, chaos)
})
if updateError != nil {
return 0, updateError
}
chaos := &v1alpha1.PodHttpChaos{}
err := m.Reader.Get(ctx, m.Key, chaos)
if err != nil {
m.Log.Error(err, "error while getting the latest generation number")
return 0, err
}
return chaos.GetGeneration(), nil
}
func (m *PodHttpManager) CreateNewPodHttpChaos(ctx context.Context) error {
var err error
chaos := &v1alpha1.PodHttpChaos{}
pod := v1.Pod{}
err = m.Client.Get(ctx, m.Key, &pod)
if err != nil {
if !k8sError.IsNotFound(err) {
m.Log.Error(err, "error while finding pod")
return err
}
m.Log.Info("pod not found", "key", m.Key, "error", err.Error())
err = ErrPodNotFound
return err
}
if pod.Status.Phase != v1.PodRunning {
m.Log.Info("pod is not running", "key", m.Key)
err = ErrPodNotRunning
return err
}
chaos.Name = m.Key.Name
chaos.Namespace = m.Key.Namespace
chaos.OwnerReferences = []metav1.OwnerReference{
{
APIVersion: pod.APIVersion,
Kind: pod.Kind,
Name: pod.Name,
UID: pod.UID,
},
}
err = m.T.Apply(chaos)
if err != nil {
m.Log.Error(err, "error while applying transactions", "transaction", m.T)
return err
}
return m.Client.Create(ctx, chaos)
}