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add validation to indicate kube-dns is no longer supported

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This commit is contained in:
Sandeep Rajan 2021-03-04 14:57:52 -05:00
parent 8901a9b4f3
commit 62542bb1ec
1 changed files with 11 additions and 0 deletions
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11
cmd/kubeadm/app/apis/kubeadm/validation/validation.go
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@ -57,6 +57,7 @@ func ValidateInitConfiguration(c *kubeadm.InitConfiguration) field.ErrorList {
// ValidateClusterConfiguration validates an ClusterConfiguration object and collects all encountered errors
func ValidateClusterConfiguration(c *kubeadm.ClusterConfiguration) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, ValidateDNS(&c.DNS, field.NewPath("dns"))...)
allErrs = append(allErrs, ValidateNetworking(c, field.NewPath("networking"))...)
allErrs = append(allErrs, ValidateAPIServer(&c.APIServer, field.NewPath("apiServer"))...)
allErrs = append(allErrs, ValidateAbsolutePath(c.CertificatesDir, field.NewPath("certificatesDir"))...)
@ -484,6 +485,16 @@ func getClusterNodeMask(c *kubeadm.ClusterConfiguration, isIPv6 bool) (int, erro
return maskSize, nil
}
// ValidateDNS validates the DNS object and collects all encountered errors
func ValidateDNS(dns *kubeadm.DNS, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
const kubeDNSType = "kube-dns"
if dns.Type == kubeDNSType {
allErrs = append(allErrs, field.Invalid(fldPath, dns.Type, fmt.Sprintf("DNS type %q is no longer supported", kubeDNSType)))
}
return allErrs
}
// ValidateNetworking validates networking configuration
func ValidateNetworking(c *kubeadm.ClusterConfiguration, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}