1 files changed, 393 insertions, 0 deletions
diff --git a/src/k8splugin/internal/statuscheck/ready.go b/src/k8splugin/internal/statuscheck/ready.go
new file mode 100644
index 00000000..7bea536a
--- /dev/null
+++ b/src/k8splugin/internal/statuscheck/ready.go
@@ -0,0 +1,393 @@
+/*
+Copyright The Helm Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package statuscheck // import "helm.sh/helm/v3/pkg/kube"
+
+import (
+	"context"
+	"github.com/onap/multicloud-k8s/src/k8splugin/internal/utils"
+	appsv1 "k8s.io/api/apps/v1"
+	appsv1beta1 "k8s.io/api/apps/v1beta1"
+	appsv1beta2 "k8s.io/api/apps/v1beta2"
+	batchv1 "k8s.io/api/batch/v1"
+	corev1 "k8s.io/api/core/v1"
+	extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
+	apiextv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
+	apiextv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/util/intstr"
+	"k8s.io/cli-runtime/pkg/resource"
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/kubernetes/scheme"
+	"log"
+)
+
+// ReadyCheckerOption is a function that configures a ReadyChecker.
+type ReadyCheckerOption func(*ReadyChecker)
+
+// PausedAsReady returns a ReadyCheckerOption that configures a ReadyChecker
+// to consider paused resources to be ready. For example a Deployment
+// with spec.paused equal to true would be considered ready.
+func PausedAsReady(pausedAsReady bool) ReadyCheckerOption {
+	return func(c *ReadyChecker) {
+		c.pausedAsReady = pausedAsReady
+	}
+}
+
+// CheckJobs returns a ReadyCheckerOption that configures a ReadyChecker
+// to consider readiness of Job resources.
+func CheckJobs(checkJobs bool) ReadyCheckerOption {
+	return func(c *ReadyChecker) {
+		c.checkJobs = checkJobs
+	}
+}
+
+// NewReadyChecker creates a new checker. Passed ReadyCheckerOptions can
+// be used to override defaults.
+func NewReadyChecker(cl kubernetes.Interface, opts ...ReadyCheckerOption) ReadyChecker {
+	c := ReadyChecker{
+		client: cl,
+	}
+
+	for _, opt := range opts {
+		opt(&c)
+	}
+
+	return c
+}
+
+// ReadyChecker is a type that can check core Kubernetes types for readiness.
+type ReadyChecker struct {
+	client        kubernetes.Interface
+	checkJobs     bool
+	pausedAsReady bool
+}
+
+// IsReady checks if v is ready. It supports checking readiness for pods,
+// deployments, persistent volume claims, services, daemon sets, custom
+// resource definitions, stateful sets, replication controllers, and replica
+// sets. All other resource kinds are always considered ready.
+//
+// IsReady will fetch the latest state of the object from the server prior to
+// performing readiness checks, and it will return any error encountered.
+func (c *ReadyChecker) IsReady(ctx context.Context, v *resource.Info) (bool, error) {
+	var (
+		// This defaults to true, otherwise we get to a point where
+		// things will always return false unless one of the objects
+		// that manages pods has been hit
+		ok  = true
+		err error
+	)
+	switch value := AsVersioned(v).(type) {
+	case *corev1.Pod:
+		pod, err := c.client.CoreV1().Pods(v.Namespace).Get(ctx, v.Name, metav1.GetOptions{})
+		if err != nil || !c.isPodReady(pod) {
+			return false, err
+		}
+	case *batchv1.Job:
+		if c.checkJobs {
+			job, err := c.client.BatchV1().Jobs(v.Namespace).Get(ctx, v.Name, metav1.GetOptions{})
+			if err != nil || !c.jobReady(job) {
+				return false, err
+			}
+		}
+	case *appsv1.Deployment, *appsv1beta1.Deployment, *appsv1beta2.Deployment, *extensionsv1beta1.Deployment:
+		currentDeployment, err := c.client.AppsV1().Deployments(v.Namespace).Get(ctx, v.Name, metav1.GetOptions{})
+		if err != nil {
+			return false, err
+		}
+		// If paused deployment will never be ready
+		if currentDeployment.Spec.Paused {
+			return c.pausedAsReady, nil
+		}
+		// Find RS associated with deployment
+		newReplicaSet, err := utils.GetNewReplicaSet(currentDeployment, c.client.AppsV1())
+		if err != nil || newReplicaSet == nil {
+			return false, err
+		}
+		if !c.deploymentReady(newReplicaSet, currentDeployment) {
+			return false, nil
+		}
+	case *corev1.PersistentVolumeClaim:
+		claim, err := c.client.CoreV1().PersistentVolumeClaims(v.Namespace).Get(ctx, v.Name, metav1.GetOptions{})
+		if err != nil {
+			return false, err
+		}
+		if !c.volumeReady(claim) {
+			return false, nil
+		}
+	case *corev1.Service:
+		svc, err := c.client.CoreV1().Services(v.Namespace).Get(ctx, v.Name, metav1.GetOptions{})
+		if err != nil {
+			return false, err
+		}
+		if !c.serviceReady(svc) {
+			return false, nil
+		}
+	case *extensionsv1beta1.DaemonSet, *appsv1.DaemonSet, *appsv1beta2.DaemonSet:
+		ds, err := c.client.AppsV1().DaemonSets(v.Namespace).Get(ctx, v.Name, metav1.GetOptions{})
+		if err != nil {
+			return false, err
+		}
+		if !c.daemonSetReady(ds) {
+			return false, nil
+		}
+	case *apiextv1beta1.CustomResourceDefinition:
+		if err := v.Get(); err != nil {
+			return false, err
+		}
+		crd := &apiextv1beta1.CustomResourceDefinition{}
+		if err := scheme.Scheme.Convert(v.Object, crd, nil); err != nil {
+			return false, err
+		}
+		if !c.crdBetaReady(*crd) {
+			return false, nil
+		}
+	case *apiextv1.CustomResourceDefinition:
+		if err := v.Get(); err != nil {
+			return false, err
+		}
+		crd := &apiextv1.CustomResourceDefinition{}
+		if err := scheme.Scheme.Convert(v.Object, crd, nil); err != nil {
+			return false, err
+		}
+		if !c.crdReady(*crd) {
+			return false, nil
+		}
+	case *appsv1.StatefulSet, *appsv1beta1.StatefulSet, *appsv1beta2.StatefulSet:
+		sts, err := c.client.AppsV1().StatefulSets(v.Namespace).Get(ctx, v.Name, metav1.GetOptions{})
+		if err != nil {
+			return false, err
+		}
+		if !c.statefulSetReady(sts) {
+			return false, nil
+		}
+	case *corev1.ReplicationController, *extensionsv1beta1.ReplicaSet, *appsv1beta2.ReplicaSet, *appsv1.ReplicaSet:
+		ok, err = c.podsReadyForObject(ctx, v.Namespace, value)
+	}
+	if !ok || err != nil {
+		return false, err
+	}
+	return true, nil
+}
+
+func (c *ReadyChecker) podsReadyForObject(ctx context.Context, namespace string, obj runtime.Object) (bool, error) {
+	pods, err := c.podsforObject(ctx, namespace, obj)
+	if err != nil {
+		return false, err
+	}
+	for _, pod := range pods {
+		if !c.isPodReady(&pod) {
+			return false, nil
+		}
+	}
+	return true, nil
+}
+
+func (c *ReadyChecker) podsforObject(ctx context.Context, namespace string, obj runtime.Object) ([]corev1.Pod, error) {
+	selector, err := SelectorsForObject(obj)
+	if err != nil {
+		return nil, err
+	}
+	list, err := getPods(ctx, c.client, namespace, selector.String())
+	return list, err
+}
+
+// isPodReady returns true if a pod is ready; false otherwise.
+func (c *ReadyChecker) isPodReady(pod *corev1.Pod) bool {
+	for _, c := range pod.Status.Conditions {
+		if c.Type == corev1.PodReady && c.Status == corev1.ConditionTrue {
+			return true
+		}
+	}
+	log.Printf("Pod is not ready: %s/%s", pod.GetNamespace(), pod.GetName())
+	return false
+}
+
+func (c *ReadyChecker) jobReady(job *batchv1.Job) bool {
+	if job.Status.Failed > *job.Spec.BackoffLimit {
+		log.Printf("Job is failed: %s/%s", job.GetNamespace(), job.GetName())
+		return false
+	}
+	if job.Status.Succeeded < *job.Spec.Completions {
+		log.Printf("Job is not completed: %s/%s", job.GetNamespace(), job.GetName())
+		return false
+	}
+	return true
+}
+
+func (c *ReadyChecker) serviceReady(s *corev1.Service) bool {
+	// ExternalName Services are external to cluster so helm shouldn't be checking to see if they're 'ready' (i.e. have an IP Set)
+	if s.Spec.Type == corev1.ServiceTypeExternalName {
+		return true
+	}
+
+	// Ensure that the service cluster IP is not empty
+	if s.Spec.ClusterIP == "" {
+		log.Printf("Service does not have cluster IP address: %s/%s", s.GetNamespace(), s.GetName())
+		return false
+	}
+
+	// This checks if the service has a LoadBalancer and that balancer has an Ingress defined
+	if s.Spec.Type == corev1.ServiceTypeLoadBalancer {
+		// do not wait when at least 1 external IP is set
+		if len(s.Spec.ExternalIPs) > 0 {
+			log.Printf("Service %s/%s has external IP addresses (%v), marking as ready", s.GetNamespace(), s.GetName(), s.Spec.ExternalIPs)
+			return true
+		}
+
+		if s.Status.LoadBalancer.Ingress == nil {
+			log.Printf("Service does not have load balancer ingress IP address: %s/%s", s.GetNamespace(), s.GetName())
+			return false
+		}
+	}
+
+	return true
+}
+
+func (c *ReadyChecker) volumeReady(v *corev1.PersistentVolumeClaim) bool {
+	if v.Status.Phase != corev1.ClaimBound {
+		log.Printf("PersistentVolumeClaim is not bound: %s/%s", v.GetNamespace(), v.GetName())
+		return false
+	}
+	return true
+}
+
+func (c *ReadyChecker) deploymentReady(rs *appsv1.ReplicaSet, dep *appsv1.Deployment) bool {
+	expectedReady := *dep.Spec.Replicas - utils.MaxUnavailable(*dep)
+	if !(rs.Status.ReadyReplicas >= expectedReady) {
+		log.Printf("Deployment is not ready: %s/%s. %d out of %d expected pods are ready", dep.Namespace, dep.Name, rs.Status.ReadyReplicas, expectedReady)
+		return false
+	}
+	return true
+}
+
+func (c *ReadyChecker) daemonSetReady(ds *appsv1.DaemonSet) bool {
+	// If the update strategy is not a rolling update, there will be nothing to wait for
+	if ds.Spec.UpdateStrategy.Type != appsv1.RollingUpdateDaemonSetStrategyType {
+		return true
+	}
+
+	// Make sure all the updated pods have been scheduled
+	if ds.Status.UpdatedNumberScheduled != ds.Status.DesiredNumberScheduled {
+		log.Printf("DaemonSet is not ready: %s/%s. %d out of %d expected pods have been scheduled", ds.Namespace, ds.Name, ds.Status.UpdatedNumberScheduled, ds.Status.DesiredNumberScheduled)
+		return false
+	}
+	maxUnavailable, err := intstr.GetValueFromIntOrPercent(ds.Spec.UpdateStrategy.RollingUpdate.MaxUnavailable, int(ds.Status.DesiredNumberScheduled), true)
+	if err != nil {
+		// If for some reason the value is invalid, set max unavailable to the
+		// number of desired replicas. This is the same behavior as the
+		// `MaxUnavailable` function in deploymentutil
+		maxUnavailable = int(ds.Status.DesiredNumberScheduled)
+	}
+
+	expectedReady := int(ds.Status.DesiredNumberScheduled) - maxUnavailable
+	if !(int(ds.Status.NumberReady) >= expectedReady) {
+		log.Printf("DaemonSet is not ready: %s/%s. %d out of %d expected pods are ready", ds.Namespace, ds.Name, ds.Status.NumberReady, expectedReady)
+		return false
+	}
+	return true
+}
+
+// Because the v1 extensions API is not available on all supported k8s versions
+// yet and because Go doesn't support generics, we need to have a duplicate
+// function to support the v1beta1 types
+func (c *ReadyChecker) crdBetaReady(crd apiextv1beta1.CustomResourceDefinition) bool {
+	for _, cond := range crd.Status.Conditions {
+		switch cond.Type {
+		case apiextv1beta1.Established:
+			if cond.Status == apiextv1beta1.ConditionTrue {
+				return true
+			}
+		case apiextv1beta1.NamesAccepted:
+			if cond.Status == apiextv1beta1.ConditionFalse {
+				// This indicates a naming conflict, but it's probably not the
+				// job of this function to fail because of that. Instead,
+				// we treat it as a success, since the process should be able to
+				// continue.
+				return true
+			}
+		}
+	}
+	return false
+}
+
+func (c *ReadyChecker) crdReady(crd apiextv1.CustomResourceDefinition) bool {
+	for _, cond := range crd.Status.Conditions {
+		switch cond.Type {
+		case apiextv1.Established:
+			if cond.Status == apiextv1.ConditionTrue {
+				return true
+			}
+		case apiextv1.NamesAccepted:
+			if cond.Status == apiextv1.ConditionFalse {
+				// This indicates a naming conflict, but it's probably not the
+				// job of this function to fail because of that. Instead,
+				// we treat it as a success, since the process should be able to
+				// continue.
+				return true
+			}
+		}
+	}
+	return false
+}
+
+func (c *ReadyChecker) statefulSetReady(sts *appsv1.StatefulSet) bool {
+	// If the update strategy is not a rolling update, there will be nothing to wait for
+	if sts.Spec.UpdateStrategy.Type != appsv1.RollingUpdateStatefulSetStrategyType {
+		return true
+	}
+
+	// Dereference all the pointers because StatefulSets like them
+	var partition int
+	// 1 is the default for replicas if not set
+	var replicas = 1
+	// For some reason, even if the update strategy is a rolling update, the
+	// actual rollingUpdate field can be nil. If it is, we can safely assume
+	// there is no partition value
+	if sts.Spec.UpdateStrategy.RollingUpdate != nil && sts.Spec.UpdateStrategy.RollingUpdate.Partition != nil {
+		partition = int(*sts.Spec.UpdateStrategy.RollingUpdate.Partition)
+	}
+	if sts.Spec.Replicas != nil {
+		replicas = int(*sts.Spec.Replicas)
+	}
+
+	// Because an update strategy can use partitioning, we need to calculate the
+	// number of updated replicas we should have. For example, if the replicas
+	// is set to 3 and the partition is 2, we'd expect only one pod to be
+	// updated
+	expectedReplicas := replicas - partition
+
+	// Make sure all the updated pods have been scheduled
+	if int(sts.Status.UpdatedReplicas) != expectedReplicas {
+		log.Printf("StatefulSet is not ready: %s/%s. %d out of %d expected pods have been scheduled", sts.Namespace, sts.Name, sts.Status.UpdatedReplicas, expectedReplicas)
+		return false
+	}
+
+	if int(sts.Status.ReadyReplicas) != replicas {
+		log.Printf("StatefulSet is not ready: %s/%s. %d out of %d expected pods are ready", sts.Namespace, sts.Name, sts.Status.ReadyReplicas, replicas)
+		return false
+	}
+	return true
+}
+
+func getPods(ctx context.Context, client kubernetes.Interface, namespace, selector string) ([]corev1.Pod, error) {
+	list, err := client.CoreV1().Pods(namespace).List(ctx, metav1.ListOptions{
+		LabelSelector: selector,
+	})
+	return list.Items, err
+}