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polling.go
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polling.go
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package deployment
import (
"context"
g "github.com/sdslabs/katana/configs"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/client-go/kubernetes"
)
var (
pingers = []ResourcePinger{
PingDeployments,
PingStatefulSets,
}
)
func PingStatefulSets(ctx context.Context, kubeclientset *kubernetes.Clientset, opts map[string]string) ([]*ResourceStatus, bool, error) {
setsInterface := kubeclientset.AppsV1().StatefulSets(g.KatanaConfig.KubeNameSpace)
sets, err := setsInterface.List(ctx, metav1.ListOptions{LabelSelector: labels.Set(opts).AsSelector().String()})
if err != nil {
return nil, false, err
}
pingresult := make([]*ResourceStatus, len(sets.Items))
allReady := true
for i, set := range sets.Items {
status := &ResourceStatus{
Name: set.Name,
TotalReplicas: *set.Spec.Replicas,
ReadyReplicas: set.Status.ReadyReplicas,
Ready: set.Status.ReadyReplicas == *set.Spec.Replicas,
}
pingresult[i] = status
allReady = allReady && status.Ready
}
return pingresult, allReady, nil
}
func PingDeployments(ctx context.Context, kubeclientset *kubernetes.Clientset, opts map[string]string) ([]*ResourceStatus, bool, error) {
deploymentsInterface := kubeclientset.AppsV1().Deployments(g.KatanaConfig.KubeNameSpace)
deployments, err := deploymentsInterface.List(ctx, metav1.ListOptions{LabelSelector: labels.Set(opts).AsSelector().String()})
if err != nil {
return nil, false, err
}
pingresult := make([]*ResourceStatus, len(deployments.Items))
allReady := true
for i, deployment := range deployments.Items {
status := &ResourceStatus{
Name: deployment.Name,
TotalReplicas: *deployment.Spec.Replicas,
ReadyReplicas: deployment.Status.ReadyReplicas,
Ready: deployment.Status.ReadyReplicas == *deployment.Spec.Replicas,
}
pingresult[i] = status
allReady = allReady && status.Ready
}
return pingresult, allReady, nil
}
func PollDeployments(kubeclientset *kubernetes.Clientset, done chan<- error) {
ctx := context.Background()
var opts map[string]string
go func() {
for {
allReady := true
var results []*ResourceStatus
for _, pinger := range pingers {
result, ready, err := pinger(ctx, kubeclientset, opts)
if err != nil {
done <- err
}
allReady = allReady && ready
results = append(results, result...)
}
if allReady {
close(done)
}
}
}()
}