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Automated cherry pick of #11093: Ensure protokube can connect to kube-apiserver before #11108

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merged 1 commit into from
Mar 22, 2021
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Automated cherry pick of #11093: Ensure protokube can connect to kube-apiserver before #11108

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20 changes: 19 additions & 1 deletion protokube/pkg/protokube/kube_boot.go
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Original file line number Diff line number Diff line change
Expand Up @@ -18,10 +18,12 @@ package protokube

import (
"context"
"fmt"
"net"
"path/filepath"
"time"

metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/klog/v2"
)

Expand Down Expand Up @@ -101,8 +103,24 @@ func (k *KubeBoot) Init(volumesProvider Volumes) {

// RunSyncLoop is responsible for provision the cluster
func (k *KubeBoot) RunSyncLoop() {
ctx := context.Background()

client, err := k.Kubernetes.KubernetesClient()
if err != nil {
panic(fmt.Sprintf("could not create kubernetes client: %v", err))
}

klog.Info("polling for apiserver readiness")
for {
_, err = client.CoreV1().Namespaces().Get(ctx, "kube-system", metav1.GetOptions{})
if err == nil {
klog.Info("successfully connected to the apiserver")
break
}
klog.Infof("failed to connect to the apiserver (will sleep and retry): %v", err)
time.Sleep(5 * time.Second)
}
for {
ctx := context.Background()
if err := k.syncOnce(ctx); err != nil {
klog.Warningf("error during attempt to bootstrap (will sleep and retry): %v", err)
}
Expand Down