test: disable running with kube-proxy in 4.19 CI build

... and instead rely on kube-proxy's strict replacement.

Also disable tests that are not working on 4.19 due to missing kernel
features on NodePort side.

Signed-off-by: Paul Chaignon <paul@cilium.io>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

jenkinsfiles/ginkgo-kernel.Jenkinsfile

@@ -19,8 +19,9 @@ pipeline {
             returnStdout: true,
             script: 'echo -n "${JobKernelVersion}"'
             )}"""
-        // if we are running in net-next, we need to set NETNEXT=1, K8S_NODES=3, NO_CILIUM_ON_NODE="k8s3" and KUBEPROXY="0"
-        // otherwise we set NETNEXT=0, K8S_NODES=2, NO_CILIUM_ON_NODE="" and KUBEPROXY=""
+        // We set KUBEPROXY="0" if we are running net-next or 4.19; otherwise, KUBEPROXY=""
+        // If we are running in net-next, we need to set NETNEXT=1, K8S_NODES=3, and NO_CILIUM_ON_NODE="k8s3";
+        // otherwise we set NETNEXT=0, K8S_NODES=2, and NO_CILIUM_ON_NODE="".
         NETNEXT="""${sh(
             returnStdout: true,
             script: 'if [ "${JobKernelVersion}" = "net-next" ]; then echo -n "1"; else echo -n "0"; fi'
@@ -35,7 +36,7 @@ pipeline {
             )}"""
         KUBEPROXY="""${sh(
             returnStdout: true,
-            script: 'if [ "${JobKernelVersion}" = "net-next" ]; then echo -n "0"; else echo -n ""; fi'
+            script: 'if [ "${JobKernelVersion}" = "net-next" ] || [ "${JobKernelVersion}" = "419" ]; then echo -n "0"; else echo -n ""; fi'
             )}"""
         RUN_QUARANTINED="""${sh(
 				returnStdout: true,

test/k8sT/Services.go

@@ -741,8 +741,7 @@ var _ = Describe("K8sServicesTest", func() {
 				}(url)
 			}
 			// TODO: IPv6
-
-			if bpfNodePort {
+			if bpfNodePort && helpers.RunsOnNetNextKernel() {
 				httpURL := getHTTPLink("127.0.0.1", data.Spec.Ports[0].NodePort)
 				tftpURL := getTFTPLink("127.0.0.1", data.Spec.Ports[1].NodePort)
 				testCurlFromPodsFail(testDSClient, httpURL)
@@ -752,7 +751,6 @@ var _ = Describe("K8sServicesTest", func() {
 				tftpURL = getTFTPLink("::ffff:127.0.0.1", data.Spec.Ports[1].NodePort)
 				testCurlFromPodsFail(testDSClient, httpURL)
 				testCurlFromPodsFail(testDSClient, tftpURL)
-
 			}
 
 			wg.Wait()