Esempio n. 1
0
// 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
}
Esempio n. 2
0
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
}