Mark the helper functions with t.Helper() so that if t.Errorf() in these
functions gets called, it will report that the failure occurred on the
line number of the caller of the helper, rather than the line number of
the helper itself, which makes it hard to identify which case causes the
failure.
Signed-off-by: Quan Tian <qtian@vmware.com>
When defining a ClusterIP Service, we can specify externalIP, and the
traffic policy of externalIP is subject to externalTrafficPolicy.
However, the policy can't be set when type is not NodePort or
LoadBalancer, and will default to Cluster when kube-proxy processes the
Service.
This commit updates the defaulting and validation of Service to allow
specifying ExternalTrafficPolicy for ClusterIP Services with
ExternalIPs.
Signed-off-by: Quan Tian <qtian@vmware.com>
1. Add API definitions;
2. Add feature gate and drops the field when feature gate is not on;
3. Set default values for the field;
4. Add API Validation
5. add kube-proxy iptables and ipvs implementations
6. add tests
