// isFederationQuery checks if the given query `path` matches the federated service query pattern.
// The conjunction of the following conditions forms the test for the federated service query
// pattern:
// 1. `path` has exactly 4+len(domainPath) segments: mysvc.myns.myfederation.svc.domain.path.
// 2. Service name component must be a valid RFC 1035 name.
// 3. Namespace component must be a valid RFC 1123 name.
// 4. Federation component must also be a valid RFC 1123 name.
// 5. Fourth segment is exactly "svc"
// 6. The remaining segments match kd.domainPath.
// 7. And federation must be one of the listed federations in the config.
// Note: Because of the above conditions, this method will treat wildcard queries such as
// *.mysvc.myns.myfederation.svc.domain.path as non-federation queries.
// We can add support for wildcard queries later, if needed.
func (kd *KubeDNS) isFederationQuery(path []string) bool {
if len(path) != 4+len(kd.domainPath) {
glog.V(2).Infof("not a federation query: len(%q) != 4+len(%q)", path, kd.domainPath)
return false
}
if errs := validation.IsDNS1035Label(path[0]); len(errs) != 0 {
glog.V(2).Infof("not a federation query: %q is not an RFC 1035 label: %q", path[0], errs)
return false
}
if errs := validation.IsDNS1123Label(path[1]); len(errs) != 0 {
glog.V(2).Infof("not a federation query: %q is not an RFC 1123 label: %q", path[1], errs)
return false
}
if errs := validation.IsDNS1123Label(path[2]); len(errs) != 0 {
glog.V(2).Infof("not a federation query: %q is not an RFC 1123 label: %q", path[2], errs)
return false
}
if path[3] != serviceSubdomain {
glog.V(2).Infof("not a federation query: %q != %q (serviceSubdomain)", path[3], serviceSubdomain)
return false
}
for i, domComp := range kd.domainPath {
// kd.domainPath is reversed, so we need to look in the `path` in the reverse order.
if domComp != path[len(path)-i-1] {
glog.V(2).Infof("not a federation query: kd.domainPath[%d] != path[%d] (%q != %q)", i, len(path)-i-1, domComp, path[len(path)-i-1])
return false
}
}
if _, ok := kd.federations[path[2]]; !ok {
glog.V(2).Infof("not a federation query: kd.federations[%q] not found", path[2])
return false
}
return true
}
func ValidateAPIService(apiServer *discoveryapi.APIService) field.ErrorList {
requiredName := apiServer.Spec.Version + "." + apiServer.Spec.Group
allErrs := validation.ValidateObjectMeta(&apiServer.ObjectMeta, false,
func(name string, prefix bool) []string {
if minimalFailures := path.IsValidPathSegmentName(name); len(minimalFailures) > 0 {
return minimalFailures
}
// the name *must* be version.group
if name != requiredName {
return []string{fmt.Sprintf("must be `spec.version+\".\"+spec.group`: %q", requiredName)}
}
return []string{}
},
field.NewPath("metadata"))
// in this case we allow empty group
if len(apiServer.Spec.Group) == 0 && apiServer.Spec.Version != "v1" {
allErrs = append(allErrs, field.Required(field.NewPath("spec", "group"), "only v1 may have an empty group and it better be legacy kube"))
}
if len(apiServer.Spec.Group) > 0 {
for _, errString := range utilvalidation.IsDNS1123Subdomain(apiServer.Spec.Group) {
allErrs = append(allErrs, field.Invalid(field.NewPath("spec", "group"), apiServer.Spec.Group, errString))
}
}
for _, errString := range utilvalidation.IsDNS1035Label(apiServer.Spec.Version) {
allErrs = append(allErrs, field.Invalid(field.NewPath("spec", "version"), apiServer.Spec.Version, errString))
}
if apiServer.Spec.Priority <= 0 || apiServer.Spec.Priority > 1000 {
allErrs = append(allErrs, field.Invalid(field.NewPath("spec", "priority"), apiServer.Spec.Priority, "priority must be positive and less than 1000"))
}
if len(apiServer.Spec.Service.Namespace) == 0 {
allErrs = append(allErrs, field.Required(field.NewPath("spec", "service", "namespace"), ""))
}
if len(apiServer.Spec.Service.Name) == 0 {
allErrs = append(allErrs, field.Required(field.NewPath("spec", "service", "name"), ""))
}
if apiServer.Spec.InsecureSkipTLSVerify && len(apiServer.Spec.CABundle) > 0 {
allErrs = append(allErrs, field.Invalid(field.NewPath("spec", "insecureSkipTLSVerify"), apiServer.Spec.InsecureSkipTLSVerify, "may not be true if caBundle is present"))
}
return allErrs
}