daemon.go

Documentation: github.com/chaos-mesh/chaos-mesh/pkg/ctrl/server

     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 server
    17  
    18  import (
    19  	"context"
    20  
    21  	"github.com/pkg/errors"
    22  	v1 "k8s.io/api/core/v1"
    23  
    24  	"github.com/chaos-mesh/chaos-mesh/controllers/chaosimpl/utils"
    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  		err = errors.Wrapf(utils.ErrContainerNotFound, "pod %s/%s has empty container status", pod.Namespace, pod.Name)
    43  		return 0, err
    44  	}
    45  
    46  	res, err := daemonClient.ContainerGetPid(ctx, &pb.ContainerRequest{
    47  		Action: &pb.ContainerAction{
    48  			Action: pb.ContainerAction_GETPID,
    49  		},
    50  		ContainerId: pod.Status.ContainerStatuses[0].ContainerID,
    51  	})
    52  	if err != nil {
    53  		return 0, errors.Wrapf(err, "failed get pid from pod %s/%s", pod.GetNamespace(), pod.GetName())
    54  	}
    55  	return res.Pid, nil
    56  }
    57