Change:
if protocol == "udp" { // TODO: It would be enough to pass 1s+epsilon to timeout, but unfortunately // busybox timeout doesn't support non-integer values. <del> cmd = fmt.Sprintf("echo 'hostName' | timeout -t 2 nc -w 1 -u %s %d", targetIP, targetPort) </del> <ins> cmd = fmt.Sprintf("echo 'hostName' | nc -w 1 -u %s %d", targetIP, targetPort) </ins> } else { ipPort := net.JoinHostPort(targetIP, strconv.Itoa(targetPort)) // The current versions of curl included in CentOS and RHEL distros // misinterpret square brackets around IPv6 as globbing, so use the -g // argument to disable globbing to handle the IPv6 case. <del> cmd = fmt.Sprintf("timeout -t 15 curl -g -q -s --connect-timeout 1 http://%s/hostName", ipPort) </del> <ins> cmd = fmt.Sprintf("curl -g -q -s --max-time 15 --connect-timeout 1 http://%s/hostName", ipPort) </ins> } // TODO: This simply tells us that we can reach the endpoints. Check that

Discussion:
<!-- This form is for bug reports and feature requests ONLY! If you're looking for help check and the . If the matter is security related, please disclose it privately via --Is this a BUG REPORT or FEATURE REQUEST?: /kind bug /sig testing What happened: Some commands used in tests are Linux specific and do not exist or do not behave the same on Windows nodes. This can cause those tests to fail on Windows nodes. Some of the tests are: [sig-network] Networking Granular Checks: Pods should function for node-pod communication: http [NodeConformance] [sig-network] Networking Granular Checks: Pods should function for node-pod communication: udp [NodeConformance] [sig-network] Networking Granular Checks: Services [Slow] should function for node-Service: http [sig-network] Networking Granular Checks: Services [Slow] should function for node-Service: udp [sig-network] Networking Granular Checks: Services [Slow] should update nodePort: http [Slow] [sig-network] Networking Granular Checks: Services [Slow] should update nodePort: udp [Slow] [sig-network] NetworkPolicy NetworkPolicy between server and client should support a 'default-deny' policy [Feature:NetworkPolicy] [sig-network] NetworkPolicy NetworkPolicy between server and client should enforce policy based on PodSelector [Feature:NetworkPolicy] [sig-network] NetworkPolicy NetworkPolicy between server and client should enforce policy based on NamespaceSelector [Feature:NetworkPolicy] [sig-network] NetworkPolicy NetworkPolicy between server and client should enforce policy based on Ports [Feature:NetworkPolicy] [sig-network] NetworkPolicy NetworkPolicy between server and client should enforce multiple, stacked policies with overlapping podSelectors [Feature:NetworkPolicy] [sig-network] NetworkPolicy NetworkPolicy between server and client should support allow-all policy [Feature:NetworkPolicy] [sig-network] NetworkPolicy NetworkPolicy between server and client should allow ingress access on one named port [Feature:NetworkPolicy] [sig-network] NetworkPolicy NetworkPolicy between server and client should allow egress access on one named port [Feature:NetworkPolicy] What you expected to happen: The commands used by those tests should be platform agnostic, so they can pass using Windows Nodes as well. How to reproduce it (as minimally and precisely as possible): Run the mentioned tests using Windows Nodes. Anything else we need to know?

: Environment: Kubernetes version (use ): v1.12.0-rc.2 Cloud provider or hardware configuration: N/A OS (e.g. from /etc/os-release): Windows Server 1803 compute nodes Kernel (e.g. ): N/A Install tools: N/A Others: