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Allow specifying ExternalTrafficPolicy for ClusterIP Services with ExternalIPs

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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>
This commit is contained in:
Quan Tian
2023-07-07 11:51:55 +08:00
parent 3cf3702d1e
commit 2b69daa960
14 changed files with 282 additions and 19 deletions
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12
pkg/api/v1/service/util.go
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@@ -67,10 +67,16 @@ func GetLoadBalancerSourceRanges(service *v1.Service) (utilnet.IPNetSet, error)
return ipnets, nil
}
// ExternalPolicyLocal checks if service has ETP = Local.
// ExternallyAccessible checks if service is externally accessible.
func ExternallyAccessible(service *v1.Service) bool {
return service.Spec.Type == v1.ServiceTypeLoadBalancer ||
service.Spec.Type == v1.ServiceTypeNodePort ||
(service.Spec.Type == v1.ServiceTypeClusterIP && len(service.Spec.ExternalIPs) > 0)
}
// ExternalPolicyLocal checks if service is externally accessible and has ETP = Local.
func ExternalPolicyLocal(service *v1.Service) bool {
if service.Spec.Type != v1.ServiceTypeLoadBalancer &&
service.Spec.Type != v1.ServiceTypeNodePort {
if !ExternallyAccessible(service) {
return false
}
return service.Spec.ExternalTrafficPolicy == v1.ServiceExternalTrafficPolicyLocal