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Better URL for scraping metrics from kubelet

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Signed-off-by: Davanum Srinivas <davanum@gmail.com>
This commit is contained in:
Davanum Srinivas
2023-06-27 14:47:54 -04:00
parent b3d94ae74f
commit a75b00ea39
4 changed files with 24 additions and 4 deletions
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22
test/e2e_node/util.go
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@@ -40,6 +40,7 @@ import (
v1 "k8s.io/api/core/v1"
apiequality "k8s.io/apimachinery/pkg/api/equality"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
utilnet "k8s.io/apimachinery/pkg/util/net"
"k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/sets"
utilfeature "k8s.io/apiserver/pkg/util/feature"
@@ -289,7 +290,7 @@ func logKubeletLatencyMetrics(ctx context.Context, metricNames ...string) {
for _, key := range metricNames {
metricSet.Insert(kubeletmetrics.KubeletSubsystem + "_" + key)
}
metric, err := e2emetrics.GrabKubeletMetricsWithoutProxy(ctx, fmt.Sprintf("%s:%d", framework.TestContext.NodeName, ports.KubeletReadOnlyPort), "/metrics")
metric, err := e2emetrics.GrabKubeletMetricsWithoutProxy(ctx, fmt.Sprintf("%s:%d", nodeNameOrIP(), ports.KubeletReadOnlyPort), "/metrics")
if err != nil {
framework.Logf("Error getting kubelet metrics: %v", err)
} else {
@@ -623,3 +624,22 @@ func WaitForPodInitContainerToFail(ctx context.Context, c clientset.Interface, n
return false, nil
})
}
func nodeNameOrIP() string {
// Check if the node name in test context can be resolved
if ips, err := net.LookupIP(framework.TestContext.NodeName); err != nil {
if dnsErr, ok := err.(*net.DNSError); ok && dnsErr.IsNotFound {
// if it can't be resolved, pick a host interface
if ip, err := utilnet.ChooseHostInterface(); err == nil {
return ip.String()
}
}
} else {
if len(ips) > 0 {
// yay, node name resolved correctly, pick the first
return ips[0].String()
}
}
// fallback to node name in test context
return framework.TestContext.NodeName
}