awschaos_webhook.go

Documentation: github.com/chaos-mesh/chaos-mesh/api/v1alpha1

     1  // Copyright 2020 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  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package v1alpha1
    15  
    16  import (
    17  	"fmt"
    18  	"reflect"
    19  
    20  	"k8s.io/apimachinery/pkg/runtime"
    21  	"k8s.io/apimachinery/pkg/util/validation/field"
    22  	logf "sigs.k8s.io/controller-runtime/pkg/log"
    23  	"sigs.k8s.io/controller-runtime/pkg/webhook"
    24  )
    25  
    26  // log is for logging in this package.
    27  var awschaoslog = logf.Log.WithName("awschaos-resource")
    28  
    29  // updating spec of a chaos will have no effect, we'd better reject it
    30  var ErrCanNotUpdateChaos = fmt.Errorf("Cannot update chaos spec")
    31  
    32  // +kubebuilder:webhook:path=/mutate-chaos-mesh-org-v1alpha1-awschaos,mutating=true,failurePolicy=fail,groups=chaos-mesh.org,resources=awschaos,verbs=create;update,versions=v1alpha1,name=mawschaos.kb.io
    33  
    34  var _ webhook.Defaulter = &AWSChaos{}
    35  
    36  // Default implements webhook.Defaulter so a webhook will be registered for the type
    37  func (in *AWSChaos) Default() {
    38  	awschaoslog.Info("default", "name", in.Name)
    39  	in.Spec.Default()
    40  }
    41  
    42  func (in *AWSChaosSpec) Default() {}
    43  
    44  // +kubebuilder:webhook:verbs=create;update,path=/validate-chaos-mesh-org-v1alpha1-awschaos,mutating=false,failurePolicy=fail,groups=chaos-mesh.org,resources=awschaos,versions=v1alpha1,name=vawschaos.kb.io
    45  
    46  var _ webhook.Validator = &AWSChaos{}
    47  
    48  // ValidateCreate implements webhook.Validator so a webhook will be registered for the type
    49  func (in *AWSChaos) ValidateCreate() error {
    50  	awschaoslog.Info("validate create", "name", in.Name)
    51  	return in.Validate()
    52  }
    53  
    54  // ValidateUpdate implements webhook.Validator so a webhook will be registered for the type
    55  func (in *AWSChaos) ValidateUpdate(old runtime.Object) error {
    56  	awschaoslog.Info("validate update", "name", in.Name)
    57  	if !reflect.DeepEqual(in.Spec, old.(*AWSChaos).Spec) {
    58  		return ErrCanNotUpdateChaos
    59  	}
    60  	return in.Validate()
    61  }
    62  
    63  // ValidateDelete implements webhook.Validator so a webhook will be registered for the type
    64  func (in *AWSChaos) ValidateDelete() error {
    65  	awschaoslog.Info("validate delete", "name", in.Name)
    66  
    67  	// Nothing to do?
    68  	return nil
    69  }
    70  
    71  // Validate validates chaos object
    72  func (in *AWSChaos) Validate() error {
    73  	allErrs := in.Spec.Validate()
    74  
    75  	if len(allErrs) > 0 {
    76  		return fmt.Errorf(allErrs.ToAggregate().Error())
    77  	}
    78  	return nil
    79  }
    80  
    81  func (in *AWSChaosSpec) Validate() field.ErrorList {
    82  	specField := field.NewPath("spec")
    83  	allErrs := in.validateEbsVolume(specField.Child("volumeID"))
    84  	allErrs = append(allErrs, in.validateAction(specField)...)
    85  	allErrs = append(allErrs, validateDuration(in, specField)...)
    86  	allErrs = append(allErrs, in.validateDeviceName(specField.Child("deviceName"))...)
    87  	return allErrs
    88  }
    89  
    90  // validateEbsVolume validates the EbsVolume
    91  func (in *AWSChaosSpec) validateEbsVolume(containerField *field.Path) field.ErrorList {
    92  	allErrs := field.ErrorList{}
    93  	if in.Action == DetachVolume {
    94  		if in.EbsVolume == nil {
    95  			err := fmt.Errorf("the ID of EBS volume should not be empty on %s action", in.Action)
    96  			allErrs = append(allErrs, field.Invalid(containerField, in.EbsVolume, err.Error()))
    97  		}
    98  	}
    99  	return allErrs
   100  }
   101  
   102  // validateDeviceName validates the DeviceName
   103  func (in *AWSChaosSpec) validateDeviceName(containerField *field.Path) field.ErrorList {
   104  	allErrs := field.ErrorList{}
   105  	if in.Action == DetachVolume {
   106  		if in.DeviceName == nil {
   107  			err := fmt.Errorf("the name of device should not be empty on %s action", in.Action)
   108  			allErrs = append(allErrs, field.Invalid(containerField, in.DeviceName, err.Error()))
   109  		}
   110  	}
   111  	return allErrs
   112  }
   113  
   114  // ValidateScheduler validates the scheduler and duration
   115  func (in *AWSChaosSpec) validateAction(spec *field.Path) field.ErrorList {
   116  	allErrs := field.ErrorList{}
   117  
   118  	switch in.Action {
   119  	case Ec2Stop, DetachVolume:
   120  	case Ec2Restart:
   121  	default:
   122  		err := fmt.Errorf("awschaos have unknown action type")
   123  		log.Error(err, "Wrong AWSChaos Action type")
   124  
   125  		actionField := spec.Child("action")
   126  		allErrs = append(allErrs, field.Invalid(actionField, in.Action, err.Error()))
   127  	}
   128  	return allErrs
   129  }
   130