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Merge pull request #77167 from paulsubrata55/spaul-kube-proxy-fix

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Fix for kube-proxy to wait for some duration for the node to be defined.
This commit is contained in:
Kubernetes Prow Robot 2019-08-09 19:47:14 -07:00 committed by GitHub
commit c8c9d2e21c
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3 changed files with 27 additions and 8 deletions
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3
cmd/kube-proxy/app/server_others.go
View File

@ -137,6 +137,9 @@ func newProxyServer(
nodeIP := net.ParseIP(config.BindAddress)
if nodeIP.IsUnspecified() {
nodeIP = utilnode.GetNodeIP(client, hostname)
if nodeIP == nil {
return nil, fmt.Errorf("unable to get node IP for hostname %s", hostname)
}
}
if proxyMode == proxyModeIPTables {
klog.V(0).Info("Using iptables Proxier.")

1
pkg/util/node/BUILD
View File

@ -16,6 +16,7 @@ go_library(
"//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/types:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/util/strategicpatch:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/util/wait:go_default_library",
"//staging/src/k8s.io/client-go/kubernetes:go_default_library",
"//staging/src/k8s.io/client-go/kubernetes/typed/core/v1:go_default_library",
"//vendor/k8s.io/klog:go_default_library",

31
pkg/util/node/node.go
View File

@ -31,6 +31,7 @@ import (
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/strategicpatch"
"k8s.io/apimachinery/pkg/util/wait"
clientset "k8s.io/client-go/kubernetes"
v1core "k8s.io/client-go/kubernetes/typed/core/v1"
)
@ -107,17 +108,31 @@ func GetNodeHostIP(node *v1.Node) (net.IP, error) {
}
// GetNodeIP returns the ip of node with the provided hostname
// If required, wait for the node to be defined.
func GetNodeIP(client clientset.Interface, hostname string) net.IP {
var nodeIP net.IP
node, err := client.CoreV1().Nodes().Get(hostname, metav1.GetOptions{})
if err != nil {
klog.Warningf("Failed to retrieve node info: %v", err)
return nil
backoff := wait.Backoff{
Steps: 5,
Duration: 1 * time.Second,
Factor: 2.0,
Jitter: 0.2,
}
nodeIP, err = GetNodeHostIP(node)
if err != nil {
klog.Warningf("Failed to retrieve node IP: %v", err)
return nil
err := wait.ExponentialBackoff(backoff, func() (bool, error) {
node, err := client.CoreV1().Nodes().Get(hostname, metav1.GetOptions{})
if err != nil {
klog.Errorf("Failed to retrieve node info: %v", err)
return false, nil
}
nodeIP, err = GetNodeHostIP(node)
if err != nil {
klog.Errorf("Failed to retrieve node IP: %v", err)
return false, err
}
return true, nil
})
if err == nil {
klog.Infof("Successfully retrieved node IP: %v", nodeIP)
}
return nodeIP
}