selector.go

Documentation: github.com/chaos-mesh/chaos-mesh/pkg/selector/container

     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 container
    17  
    18  import (
    19  	"context"
    20  
    21  	"go.uber.org/fx"
    22  	v1 "k8s.io/api/core/v1"
    23  	"sigs.k8s.io/controller-runtime/pkg/client"
    24  
    25  	"github.com/chaos-mesh/chaos-mesh/api/v1alpha1"
    26  	"github.com/chaos-mesh/chaos-mesh/controllers/config"
    27  	"github.com/chaos-mesh/chaos-mesh/pkg/selector/generic"
    28  	"github.com/chaos-mesh/chaos-mesh/pkg/selector/pod"
    29  )
    30  
    31  type SelectImpl struct {
    32  	c client.Client
    33  	r client.Reader
    34  
    35  	generic.Option
    36  }
    37  
    38  type Container struct {
    39  	v1.Pod
    40  	ContainerName string
    41  }
    42  
    43  func (c *Container) Id() string {
    44  	return c.Pod.Namespace + "/" + c.Pod.Name + "/" + c.ContainerName
    45  }
    46  
    47  func (impl *SelectImpl) Select(ctx context.Context, cs *v1alpha1.ContainerSelector) ([]*Container, error) {
    48  	pods, err := pod.SelectAndFilterPods(ctx, impl.c, impl.r, &cs.PodSelector, impl.ClusterScoped, impl.TargetNamespace, impl.EnableFilterNamespace)
    49  	if err != nil {
    50  		return nil, err
    51  	}
    52  
    53  	containerNameMap := make(map[string]struct{})
    54  	for _, name := range cs.ContainerNames {
    55  		containerNameMap[name] = struct{}{}
    56  	}
    57  
    58  	var result []*Container
    59  	for _, pod := range pods {
    60  		if len(cs.ContainerNames) == 0 {
    61  			result = append(result, &Container{
    62  				Pod:           pod,
    63  				ContainerName: pod.Spec.Containers[0].Name,
    64  			})
    65  			continue
    66  		}
    67  
    68  		for _, container := range pod.Spec.Containers {
    69  			if _, ok := containerNameMap[container.Name]; ok {
    70  				result = append(result, &Container{
    71  					Pod:           pod,
    72  					ContainerName: container.Name,
    73  				})
    74  			}
    75  		}
    76  	}
    77  
    78  	return result, nil
    79  }
    80  
    81  type Params struct {
    82  	fx.In
    83  
    84  	Client client.Client
    85  	Reader client.Reader `name:"no-cache"`
    86  }
    87  
    88  func New(params Params) *SelectImpl {
    89  	return &SelectImpl{
    90  		params.Client,
    91  		params.Reader,
    92  		generic.Option{
    93  			ClusterScoped:         config.ControllerCfg.ClusterScoped,
    94  			TargetNamespace:       config.ControllerCfg.TargetNamespace,
    95  			EnableFilterNamespace: config.ControllerCfg.EnableFilterNamespace,
    96  		},
    97  	}
    98  }
    99