daemon.go

Documentation: github.com/chaos-mesh/chaos-mesh/pkg/ctrlserver/graph

     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 graph
    17  
    18  import (
    19  	"context"
    20  	"fmt"
    21  
    22  	"github.com/pkg/errors"
    23  	v1 "k8s.io/api/core/v1"
    24  
    25  	"github.com/chaos-mesh/chaos-mesh/controllers/utils/chaosdaemon"
    26  	"github.com/chaos-mesh/chaos-mesh/pkg/chaosdaemon/pb"
    27  )
    28  
    29  type DaemonHelper struct {
    30  	Builder *chaosdaemon.ChaosDaemonClientBuilder
    31  }
    32  
    33  // GetPidFromPod returns pid given containerd ID in pod
    34  func (h *DaemonHelper) GetPidFromPod(ctx context.Context, pod *v1.Pod) (uint32, error) {
    35  	daemonClient, err := h.Builder.Build(ctx, pod, nil)
    36  	if err != nil {
    37  		return 0, errors.Wrapf(err, "failed to craete new chaos daemon client of pod(%s/%s)", pod.Namespace, pod.Name)
    38  	}
    39  	defer daemonClient.Close()
    40  
    41  	if len(pod.Status.ContainerStatuses) == 0 {
    42  		return 0, fmt.Errorf("%s %s can't get the state of container", pod.Namespace, pod.Name)
    43  	}
    44  
    45  	res, err := daemonClient.ContainerGetPid(ctx, &pb.ContainerRequest{
    46  		Action: &pb.ContainerAction{
    47  			Action: pb.ContainerAction_GETPID,
    48  		},
    49  		ContainerId: pod.Status.ContainerStatuses[0].ContainerID,
    50  	})
    51  	if err != nil {
    52  		return 0, errors.Wrapf(err, "failed get pid from pod %s/%s", pod.GetNamespace(), pod.GetName())
    53  	}
    54  	return res.Pid, nil
    55  }
    56