src/k8splugin/internal/statuscheck/wait.go

   1 /*
   2 Copyright The Helm Authors.
   3
   4 Licensed under the Apache License, Version 2.0 (the "License");
   5 you may not use this file except in compliance with the License.
   6 You may obtain a copy of the License at
   7
   8     http://www.apache.org/licenses/LICENSE-2.0
   9
  10 Unless required by applicable law or agreed to in writing, software
  11 distributed under the License is distributed on an "AS IS" BASIS,
  12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 See the License for the specific language governing permissions and
  14 limitations under the License.
  15 */
  16
  17 package statuscheck // import "helm.sh/helm/v3/pkg/kube"
  18
  19 import (
  20         "context"
  21         "fmt"
  22         "time"
  23
  24         "github.com/pkg/errors"
  25         appsv1 "k8s.io/api/apps/v1"
  26         appsv1beta1 "k8s.io/api/apps/v1beta1"
  27         appsv1beta2 "k8s.io/api/apps/v1beta2"
  28         batchv1 "k8s.io/api/batch/v1"
  29         corev1 "k8s.io/api/core/v1"
  30         extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
  31         metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
  32         "k8s.io/apimachinery/pkg/labels"
  33         "k8s.io/apimachinery/pkg/runtime"
  34
  35         "k8s.io/apimachinery/pkg/util/wait"
  36 )
  37
  38 type waiter struct {
  39         c       ReadyChecker
  40         timeout time.Duration
  41         log     func(string, ...interface{})
  42 }
  43
  44 // waitForResources polls to get the current status of all pods, PVCs, Services and
  45 // Jobs(optional) until all are ready or a timeout is reached
  46 func (w *waiter) waitForResources(created ResourceList) error {
  47         w.log("beginning wait for %d resources with timeout of %v", len(created), w.timeout)
  48
  49         ctx, cancel := context.WithTimeout(context.Background(), w.timeout)
  50         defer cancel()
  51
  52         return wait.PollImmediateUntil(2*time.Second, func() (bool, error) {
  53                 for _, v := range created {
  54                         ready, err := w.c.IsReady(ctx, v)
  55                         if !ready || err != nil {
  56                                 return false, err
  57                         }
  58                 }
  59                 return true, nil
  60         }, ctx.Done())
  61 }
  62
  63 // SelectorsForObject returns the pod label selector for a given object
  64 //
  65 // Modified version of https://github.com/kubernetes/kubernetes/blob/v1.14.1/pkg/kubectl/polymorphichelpers/helpers.go#L84
  66 func SelectorsForObject(object runtime.Object) (selector labels.Selector, err error) {
  67         switch t := object.(type) {
  68         case *extensionsv1beta1.ReplicaSet:
  69                 selector, err = metav1.LabelSelectorAsSelector(t.Spec.Selector)
  70         case *appsv1.ReplicaSet:
  71                 selector, err = metav1.LabelSelectorAsSelector(t.Spec.Selector)
  72         case *appsv1beta2.ReplicaSet:
  73                 selector, err = metav1.LabelSelectorAsSelector(t.Spec.Selector)
  74         case *corev1.ReplicationController:
  75                 selector = labels.SelectorFromSet(t.Spec.Selector)
  76         case *appsv1.StatefulSet:
  77                 selector, err = metav1.LabelSelectorAsSelector(t.Spec.Selector)
  78         case *appsv1beta1.StatefulSet:
  79                 selector, err = metav1.LabelSelectorAsSelector(t.Spec.Selector)
  80         case *appsv1beta2.StatefulSet:
  81                 selector, err = metav1.LabelSelectorAsSelector(t.Spec.Selector)
  82         case *extensionsv1beta1.DaemonSet:
  83                 selector, err = metav1.LabelSelectorAsSelector(t.Spec.Selector)
  84         case *appsv1.DaemonSet:
  85                 selector, err = metav1.LabelSelectorAsSelector(t.Spec.Selector)
  86         case *appsv1beta2.DaemonSet:
  87                 selector, err = metav1.LabelSelectorAsSelector(t.Spec.Selector)
  88         case *extensionsv1beta1.Deployment:
  89                 selector, err = metav1.LabelSelectorAsSelector(t.Spec.Selector)
  90         case *appsv1.Deployment:
  91                 selector, err = metav1.LabelSelectorAsSelector(t.Spec.Selector)
  92         case *appsv1beta1.Deployment:
  93                 selector, err = metav1.LabelSelectorAsSelector(t.Spec.Selector)
  94         case *appsv1beta2.Deployment:
  95                 selector, err = metav1.LabelSelectorAsSelector(t.Spec.Selector)
  96         case *batchv1.Job:
  97                 selector, err = metav1.LabelSelectorAsSelector(t.Spec.Selector)
  98         case *corev1.Service:
  99                 if t.Spec.Selector == nil || len(t.Spec.Selector) == 0 {
 100                         return nil, fmt.Errorf("invalid service '%s': Service is defined without a selector", t.Name)
 101                 }
 102                 selector = labels.SelectorFromSet(t.Spec.Selector)
 103
 104         default:
 105                 return nil, fmt.Errorf("selector for %T not implemented", object)
 106         }
 107
 108         return selector, errors.Wrap(err, "invalid label selector")
 109 }