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validation.go
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validation.go
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/*
Copyright 2019 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package validation
import (
"errors"
"fmt"
"net"
"net/url"
"regexp"
"strings"
"github.com/aws/aws-sdk-go/aws/arn"
"github.com/blang/semver/v4"
"golang.org/x/net/ipv4"
"golang.org/x/net/ipv6"
"k8s.io/apimachinery/pkg/api/validation"
"k8s.io/apimachinery/pkg/util/intstr"
utilnet "k8s.io/apimachinery/pkg/util/net"
"k8s.io/apimachinery/pkg/util/sets"
utilvalidation "k8s.io/apimachinery/pkg/util/validation"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/kops/pkg/apis/kops"
"k8s.io/kops/pkg/featureflag"
"k8s.io/kops/pkg/model/components"
"k8s.io/kops/pkg/model/iam"
"k8s.io/kops/upup/pkg/fi"
)
func newValidateCluster(cluster *kops.Cluster) field.ErrorList {
allErrs := validation.ValidateObjectMeta(&cluster.ObjectMeta, false, validation.NameIsDNSSubdomain, field.NewPath("metadata"))
clusterName := cluster.ObjectMeta.Name
if clusterName == "" {
allErrs = append(allErrs, field.Required(field.NewPath("objectMeta", "name"), "Cluster Name is required (e.g. --name=mycluster.myzone.com)"))
} else {
// Must be a dns name
errs := utilvalidation.IsDNS1123Subdomain(clusterName)
if len(errs) != 0 {
allErrs = append(allErrs, field.Invalid(field.NewPath("objectMeta", "name"), clusterName, fmt.Sprintf("Cluster Name must be a valid DNS name (e.g. --name=mycluster.myzone.com) errors: %s", strings.Join(errs, ", "))))
} else if !strings.Contains(clusterName, ".") {
// Tolerate if this is a cluster we are importing for upgrade
if cluster.ObjectMeta.Annotations[kops.AnnotationNameManagement] != kops.AnnotationValueManagementImported {
allErrs = append(allErrs, field.Invalid(field.NewPath("objectMeta", "name"), clusterName, "Cluster Name must be a fully-qualified DNS name (e.g. --name=mycluster.myzone.com)"))
}
}
}
allErrs = append(allErrs, validateClusterSpec(&cluster.Spec, cluster, field.NewPath("spec"))...)
// Additional cloud-specific validation rules
switch kops.CloudProviderID(cluster.Spec.CloudProvider) {
case kops.CloudProviderAWS:
allErrs = append(allErrs, awsValidateCluster(cluster)...)
case kops.CloudProviderGCE:
allErrs = append(allErrs, gceValidateCluster(cluster)...)
case kops.CloudProviderOpenstack:
allErrs = append(allErrs, openstackValidateCluster(cluster)...)
}
return allErrs
}
func validateClusterSpec(spec *kops.ClusterSpec, c *kops.Cluster, fieldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, validateSubnets(spec.Subnets, fieldPath.Child("subnets"))...)
// SSHAccess
for i, cidr := range spec.SSHAccess {
allErrs = append(allErrs, validateCIDR(cidr, fieldPath.Child("sshAccess").Index(i))...)
}
// KubernetesAPIAccess
for i, cidr := range spec.KubernetesAPIAccess {
allErrs = append(allErrs, validateCIDR(cidr, fieldPath.Child("kubernetesAPIAccess").Index(i))...)
}
// NodePortAccess
for i, cidr := range spec.NodePortAccess {
allErrs = append(allErrs, validateCIDR(cidr, fieldPath.Child("nodePortAccess").Index(i))...)
}
// AdditionalNetworkCIDRs
for i, cidr := range spec.AdditionalNetworkCIDRs {
allErrs = append(allErrs, validateCIDR(cidr, fieldPath.Child("additionalNetworkCIDRs").Index(i))...)
}
if spec.Topology != nil {
allErrs = append(allErrs, validateTopology(spec.Topology, fieldPath.Child("topology"))...)
}
// UpdatePolicy
allErrs = append(allErrs, IsValidValue(fieldPath.Child("updatePolicy"), spec.UpdatePolicy, []string{kops.UpdatePolicyExternal})...)
// Hooks
for i := range spec.Hooks {
allErrs = append(allErrs, validateHookSpec(&spec.Hooks[i], fieldPath.Child("hooks").Index(i))...)
}
if spec.FileAssets != nil {
for i, x := range spec.FileAssets {
allErrs = append(allErrs, validateFileAssetSpec(&x, fieldPath.Child("fileAssets").Index(i))...)
}
}
if spec.KubeAPIServer != nil {
allErrs = append(allErrs, validateKubeAPIServer(spec.KubeAPIServer, c, fieldPath.Child("kubeAPIServer"))...)
}
if spec.ExternalCloudControllerManager != nil {
if kops.CloudProviderID(spec.CloudProvider) != kops.CloudProviderOpenstack && !featureflag.EnableExternalCloudController.Enabled() {
allErrs = append(allErrs, field.Forbidden(fieldPath.Child("cloudControllerManager"), "external cloud controller manager is an experimental feature; set `export KOPS_FEATURE_FLAGS=EnableExternalCloudController`"))
}
}
if spec.KubeProxy != nil {
allErrs = append(allErrs, validateKubeProxy(spec.KubeProxy, fieldPath.Child("kubeProxy"))...)
}
if spec.Kubelet != nil {
allErrs = append(allErrs, validateKubelet(spec.Kubelet, c, fieldPath.Child("kubelet"))...)
}
if spec.MasterKubelet != nil {
allErrs = append(allErrs, validateKubelet(spec.MasterKubelet, c, fieldPath.Child("masterKubelet"))...)
}
if spec.Networking != nil {
allErrs = append(allErrs, validateNetworking(c, spec.Networking, fieldPath.Child("networking"))...)
if spec.Networking.Calico != nil {
allErrs = append(allErrs, validateNetworkingCalico(spec.Networking.Calico, spec.EtcdClusters[0], fieldPath.Child("networking", "calico"))...)
}
}
if spec.NodeAuthorization != nil {
allErrs = append(allErrs, field.Forbidden(fieldPath.Child("nodeAuthorization"), "NodeAuthorization must be empty. The functionality has been reimplemented and is enabled on kubernetes >= 1.19.0."))
}
if spec.ClusterAutoscaler != nil {
allErrs = append(allErrs, validateClusterAutoscaler(c, spec.ClusterAutoscaler, fieldPath.Child("clusterAutoscaler"))...)
}
if spec.NodeTerminationHandler != nil {
allErrs = append(allErrs, validateNodeTerminationHandler(c, spec.NodeTerminationHandler, fieldPath.Child("nodeTerminationHandler"))...)
}
// IAM additional policies
if spec.AdditionalPolicies != nil {
for k, v := range *spec.AdditionalPolicies {
allErrs = append(allErrs, validateAdditionalPolicy(k, v, fieldPath.Child("additionalPolicies"))...)
}
}
// IAM external policies
if spec.ExternalPolicies != nil {
for k, v := range *spec.ExternalPolicies {
allErrs = append(allErrs, validateExternalPolicies(k, v, fieldPath.Child("externalPolicies"))...)
}
}
// EtcdClusters
{
fieldEtcdClusters := fieldPath.Child("etcdClusters")
if len(spec.EtcdClusters) == 0 {
allErrs = append(allErrs, field.Required(fieldEtcdClusters, ""))
} else {
for i, etcdCluster := range spec.EtcdClusters {
allErrs = append(allErrs, validateEtcdClusterSpec(etcdCluster, c, fieldEtcdClusters.Index(i))...)
}
allErrs = append(allErrs, validateEtcdBackupStore(spec.EtcdClusters, fieldEtcdClusters)...)
allErrs = append(allErrs, validateEtcdTLS(spec.EtcdClusters, fieldEtcdClusters)...)
allErrs = append(allErrs, validateEtcdStorage(spec.EtcdClusters, fieldEtcdClusters)...)
}
}
if spec.ContainerRuntime != "" {
allErrs = append(allErrs, validateContainerRuntime(&spec.ContainerRuntime, fieldPath.Child("containerRuntime"))...)
}
if spec.Containerd != nil {
allErrs = append(allErrs, validateContainerdConfig(spec.Containerd, fieldPath.Child("containerd"))...)
}
if spec.Docker != nil {
allErrs = append(allErrs, validateDockerConfig(spec.Docker, fieldPath.Child("docker"))...)
}
if spec.Assets != nil {
if spec.Assets.ContainerProxy != nil && spec.Assets.ContainerRegistry != nil {
allErrs = append(allErrs, field.Forbidden(fieldPath.Child("assets", "containerProxy"), "containerProxy cannot be used in conjunction with containerRegistry"))
}
}
if (spec.IAM == nil || spec.IAM.Legacy) && !featureflag.LegacyIAM.Enabled() {
allErrs = append(allErrs, field.Forbidden(fieldPath.Child("iam", "legacy"), "legacy IAM permissions are no longer supported"))
}
if (spec.IAM == nil || spec.IAM.Legacy) && featureflag.UseServiceAccountIAM.Enabled() {
allErrs = append(allErrs, field.Forbidden(fieldPath.Child("iam", "legacy"), "legacy IAM permissions are not supported with UseServiceAccountIAM"))
}
if spec.RollingUpdate != nil {
allErrs = append(allErrs, validateRollingUpdate(spec.RollingUpdate, fieldPath.Child("rollingUpdate"), false)...)
}
if spec.API != nil && spec.API.LoadBalancer != nil && spec.CloudProvider == "aws" {
value := string(spec.API.LoadBalancer.Class)
allErrs = append(allErrs, IsValidValue(fieldPath.Child("class"), &value, kops.SupportedLoadBalancerClasses)...)
if featureflag.Spotinst.Enabled() && spec.API.LoadBalancer.Class == kops.LoadBalancerClassNetwork {
allErrs = append(allErrs, field.Forbidden(fieldPath, "cannot use NLB together with spotinst"))
}
if spec.API.LoadBalancer.SSLCertificate != "" && spec.API.LoadBalancer.Class != kops.LoadBalancerClassNetwork && c.IsKubernetesGTE("1.19") {
allErrs = append(allErrs, field.Forbidden(fieldPath, "sslCertificate requires network loadbalancer for K8s 1.19+ see https://github.com/kubernetes/kops/blob/master/permalinks/acm_nlb.md"))
}
if spec.API.LoadBalancer.Class == kops.LoadBalancerClassNetwork && spec.API.LoadBalancer.UseForInternalApi && spec.API.LoadBalancer.Type == kops.LoadBalancerTypeInternal {
allErrs = append(allErrs, field.Forbidden(fieldPath, "useForInternalApi cannot be used with internal NLB due lack of hairpinning support"))
}
}
return allErrs
}
func validateCIDR(cidr string, fieldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
ip, ipNet, err := net.ParseCIDR(cidr)
if err != nil {
detail := "Could not be parsed as a CIDR"
if !strings.Contains(cidr, "/") {
ip := net.ParseIP(cidr)
if ip != nil {
detail += fmt.Sprintf(" (did you mean \"%s/32\")", cidr)
}
}
allErrs = append(allErrs, field.Invalid(fieldPath, cidr, detail))
} else if !ip.Equal(ipNet.IP) {
maskSize, _ := ipNet.Mask.Size()
detail := fmt.Sprintf("Network contains bits outside prefix (did you mean \"%s/%d\")", ipNet.IP, maskSize)
allErrs = append(allErrs, field.Invalid(fieldPath, cidr, detail))
}
return allErrs
}
func validateTopology(topology *kops.TopologySpec, fieldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if topology.Masters == "" {
allErrs = append(allErrs, field.Required(fieldPath.Child("masters"), ""))
} else {
allErrs = append(allErrs, IsValidValue(fieldPath.Child("masters"), &topology.Masters, kops.SupportedTopologies)...)
}
if topology.Nodes == "" {
allErrs = append(allErrs, field.Required(fieldPath.Child("nodes"), ""))
} else {
allErrs = append(allErrs, IsValidValue(fieldPath.Child("nodes"), &topology.Nodes, kops.SupportedTopologies)...)
}
if topology.Bastion != nil {
bastion := topology.Bastion
if topology.Masters == kops.TopologyPublic || topology.Nodes == kops.TopologyPublic {
allErrs = append(allErrs, field.Forbidden(fieldPath.Child("bastion"), "bastion requires masters and nodes to have private topology"))
}
if bastion.IdleTimeoutSeconds != nil && *bastion.IdleTimeoutSeconds <= 0 {
allErrs = append(allErrs, field.Invalid(fieldPath.Child("bastion", "idleTimeoutSeconds"), *bastion.IdleTimeoutSeconds, "bastion idleTimeoutSeconds should be greater than zero"))
}
if bastion.IdleTimeoutSeconds != nil && *bastion.IdleTimeoutSeconds > 3600 {
allErrs = append(allErrs, field.Invalid(fieldPath.Child("bastion", "idleTimeoutSeconds"), *bastion.IdleTimeoutSeconds, "bastion idleTimeoutSeconds cannot be greater than one hour"))
}
}
if topology.DNS != nil {
value := string(topology.DNS.Type)
allErrs = append(allErrs, IsValidValue(fieldPath.Child("dns", "type"), &value, kops.SupportedDnsTypes)...)
}
return allErrs
}
func validateSubnets(subnets []kops.ClusterSubnetSpec, fieldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
// cannot be empty
if len(subnets) == 0 {
allErrs = append(allErrs, field.Required(fieldPath, ""))
}
// Each subnet must be valid
for i := range subnets {
allErrs = append(allErrs, validateSubnet(&subnets[i], fieldPath.Index(i))...)
}
// cannot duplicate subnet name
{
names := sets.NewString()
for i := range subnets {
name := subnets[i].Name
if names.Has(name) {
allErrs = append(allErrs, field.Duplicate(fieldPath.Index(i).Child("name"), name))
}
names.Insert(name)
}
}
// cannot mix subnets with specified ID and without specified id
if len(subnets) > 0 {
hasID := subnets[0].ProviderID != ""
for i := range subnets {
if (subnets[i].ProviderID != "") != hasID {
allErrs = append(allErrs, field.Forbidden(fieldPath.Index(i).Child("id"), "cannot mix subnets with specified ID and unspecified ID"))
}
}
}
return allErrs
}
func validateSubnet(subnet *kops.ClusterSubnetSpec, fieldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
// name is required
if subnet.Name == "" {
allErrs = append(allErrs, field.Required(fieldPath.Child("name"), ""))
}
// CIDR
if subnet.CIDR != "" {
allErrs = append(allErrs, validateCIDR(subnet.CIDR, fieldPath.Child("cidr"))...)
}
if subnet.Egress != "" {
egressType := strings.Split(subnet.Egress, "-")[0]
if egressType != kops.EgressNatGateway && egressType != kops.EgressElasticIP && egressType != kops.EgressNatInstance && egressType != kops.EgressExternal {
allErrs = append(allErrs, field.Invalid(fieldPath.Child("egress"), subnet.Egress,
"egress must be of type NAT Gateway, NAT Gateway with existing ElasticIP, NAT EC2 Instance or External"))
}
if subnet.Egress != kops.EgressExternal && subnet.Type != "Private" {
allErrs = append(allErrs, field.Forbidden(fieldPath.Child("egress"), "egress can only be specified for private subnets"))
}
}
return allErrs
}
// validateFileAssetSpec is responsible for checking a FileAssetSpec is ok
func validateFileAssetSpec(v *kops.FileAssetSpec, fieldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if v.Name == "" {
allErrs = append(allErrs, field.Required(fieldPath.Child("name"), ""))
}
if v.Content == "" {
allErrs = append(allErrs, field.Required(fieldPath.Child("content"), ""))
}
return allErrs
}
func validateHookSpec(v *kops.HookSpec, fieldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
// if this unit is disabled, short-circuit and do not validate
if v.Disabled {
return allErrs
}
if v.ExecContainer == nil && v.Manifest == "" {
allErrs = append(allErrs, field.Required(fieldPath, "you must set either manifest or execContainer for a hook"))
}
if v.ExecContainer != nil && v.UseRawManifest {
allErrs = append(allErrs, field.Forbidden(fieldPath, "execContainer may not be used with useRawManifest (use manifest instead)"))
}
if v.Manifest == "" && v.UseRawManifest {
allErrs = append(allErrs, field.Required(fieldPath, "you must set manifest when useRawManifest is true"))
}
if v.Before != nil && v.UseRawManifest {
allErrs = append(allErrs, field.Forbidden(fieldPath, "before may not be used with useRawManifest"))
}
if v.Requires != nil && v.UseRawManifest {
allErrs = append(allErrs, field.Forbidden(fieldPath, "requires may not be used with useRawManifest"))
}
if v.ExecContainer != nil {
allErrs = append(allErrs, validateExecContainerAction(v.ExecContainer, fieldPath.Child("execContainer"))...)
}
return allErrs
}
func validateExecContainerAction(v *kops.ExecContainerAction, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if v.Image == "" {
allErrs = append(allErrs, field.Required(fldPath.Child("image"), "image must be specified"))
}
return allErrs
}
func validateKubeAPIServer(v *kops.KubeAPIServerConfig, c *kops.Cluster, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if len(v.AdmissionControl) > 0 {
if len(v.DisableAdmissionPlugins) > 0 {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("disableAdmissionPlugins"),
"disableAdmissionPlugins is mutually exclusive, you cannot use both admissionControl and disableAdmissionPlugins together"))
}
}
proxyClientCertIsNil := v.ProxyClientCertFile == nil
proxyClientKeyIsNil := v.ProxyClientKeyFile == nil
if (proxyClientCertIsNil && !proxyClientKeyIsNil) || (!proxyClientCertIsNil && proxyClientKeyIsNil) {
allErrs = append(allErrs, field.Forbidden(fldPath, "proxyClientCertFile and proxyClientKeyFile must both be specified (or neither)"))
}
if v.ServiceNodePortRange != "" {
pr := &utilnet.PortRange{}
err := pr.Set(v.ServiceNodePortRange)
if err != nil {
allErrs = append(allErrs, field.Invalid(fldPath.Child("serviceNodePortRange"), v.ServiceNodePortRange, err.Error()))
}
}
if v.AuthorizationMode != nil && strings.Contains(*v.AuthorizationMode, "Webhook") {
if v.AuthorizationWebhookConfigFile == nil {
allErrs = append(allErrs, field.Required(fldPath.Child("authorizationWebhookConfigFile"), "Authorization mode Webhook requires authorizationWebhookConfigFile to be specified"))
}
}
return allErrs
}
func validateKubeProxy(k *kops.KubeProxyConfig, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
master := k.Master
for i, x := range k.IPVSExcludeCIDRS {
if _, _, err := net.ParseCIDR(x); err != nil {
allErrs = append(allErrs, field.Invalid(fldPath.Child("ipvsExcludeCidrs").Index(i), x, "Invalid network CIDR"))
}
}
if master != "" && !isValidAPIServersURL(master) {
allErrs = append(allErrs, field.Invalid(fldPath.Child("master"), master, "Not a valid APIServer URL"))
}
return allErrs
}
func validateKubelet(k *kops.KubeletConfigSpec, c *kops.Cluster, kubeletPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if k != nil {
{
// Flag removed in 1.6
if k.APIServers != "" {
allErrs = append(allErrs, field.Forbidden(
kubeletPath.Child("apiServers"),
"api-servers flag was removed in 1.6"))
}
}
{
// Flag removed in 1.10
if k.RequireKubeconfig != nil {
allErrs = append(allErrs, field.Forbidden(
kubeletPath.Child("requireKubeconfig"),
"require-kubeconfig flag was removed in 1.10. (Please be sure you are not using a cluster config from `kops get cluster --full`)"))
}
}
if k.BootstrapKubeconfig != "" {
if c.Spec.KubeAPIServer == nil {
allErrs = append(allErrs, field.Required(kubeletPath.Root().Child("spec").Child("kubeAPIServer"), "bootstrap token require the NodeRestriction admissions controller"))
}
}
if k.TopologyManagerPolicy != "" {
allErrs = append(allErrs, IsValidValue(kubeletPath.Child("topologyManagerPolicy"), &k.TopologyManagerPolicy, []string{"none", "best-effort", "restricted", "single-numa-node"})...)
if !c.IsKubernetesGTE("1.18") {
allErrs = append(allErrs, field.Forbidden(kubeletPath.Child("topologyManagerPolicy"), "topologyManagerPolicy requires at least Kubernetes 1.18"))
}
}
}
return allErrs
}
func validateNetworking(cluster *kops.Cluster, v *kops.NetworkingSpec, fldPath *field.Path) field.ErrorList {
c := &cluster.Spec
allErrs := field.ErrorList{}
optionTaken := false
if v.Classic != nil {
allErrs = append(allErrs, field.Invalid(fldPath, "classic", "classic networking is not supported"))
}
if v.Kubenet != nil {
if c.ContainerRuntime == "containerd" {
allErrs = append(allErrs, field.Invalid(fldPath, "kubenet", "kubenet networking is not supported with containerd"))
}
optionTaken = true
}
if v.External != nil {
if c.ContainerRuntime == "containerd" {
allErrs = append(allErrs, field.Invalid(fldPath, "external", "external networking is not supported with containerd"))
}
if optionTaken {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("external"), "only one networking option permitted"))
}
optionTaken = true
}
if v.CNI != nil {
if optionTaken {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("cni"), "only one networking option permitted"))
}
optionTaken = true
}
if v.Kopeio != nil {
if c.ContainerRuntime == "containerd" {
allErrs = append(allErrs, field.Invalid(fldPath, "kopeio", "kopeio networking is not supported with containerd"))
}
if optionTaken {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("kopeio"), "only one networking option permitted"))
}
optionTaken = true
}
if v.Weave != nil {
if optionTaken {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("weave"), "only one networking option permitted"))
}
optionTaken = true
}
if v.Flannel != nil {
if optionTaken {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("flannel"), "only one networking option permitted"))
}
optionTaken = true
allErrs = append(allErrs, validateNetworkingFlannel(v.Flannel, fldPath.Child("flannel"))...)
}
if v.Calico != nil {
if optionTaken {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("calico"), "only one networking option permitted"))
}
optionTaken = true
}
if v.Canal != nil {
if optionTaken {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("canal"), "only one networking option permitted"))
}
optionTaken = true
allErrs = append(allErrs, validateNetworkingCanal(v.Canal, fldPath.Child("canal"))...)
}
if v.Kuberouter != nil {
if optionTaken {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("kuberouter"), "only one networking option permitted"))
}
if c.KubeProxy != nil && (c.KubeProxy.Enabled == nil || *c.KubeProxy.Enabled) {
allErrs = append(allErrs, field.Forbidden(fldPath.Root().Child("spec", "kubeProxy", "enabled"), "kube-router requires kubeProxy to be disabled"))
}
optionTaken = true
}
if v.Romana != nil {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("romana"), "support for Romana has been removed"))
}
if v.AmazonVPC != nil {
if optionTaken {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("amazonvpc"), "only one networking option permitted"))
}
optionTaken = true
if c.CloudProvider != "aws" {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("amazonvpc"), "amazon-vpc-routed-eni networking is supported only in AWS"))
}
}
if v.Cilium != nil {
if optionTaken {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("cilium"), "only one networking option permitted"))
}
optionTaken = true
allErrs = append(allErrs, validateNetworkingCilium(cluster, v.Cilium, fldPath.Child("cilium"))...)
}
if v.LyftVPC != nil {
if optionTaken {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("lyftvpc"), "only one networking option permitted"))
}
optionTaken = true
if c.CloudProvider != "aws" {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("lyftvpc"), "amazon-vpc-routed-eni networking is supported only in AWS"))
}
}
if v.GCE != nil {
if c.ContainerRuntime == "containerd" {
allErrs = append(allErrs, field.Invalid(fldPath, "gce", "gce networking is not supported with containerd"))
}
if optionTaken {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("gce"), "only one networking option permitted"))
}
optionTaken = true
allErrs = append(allErrs, validateNetworkingGCE(c, v.GCE, fldPath.Child("gce"))...)
}
return allErrs
}
func validateNetworkingFlannel(v *kops.FlannelNetworkingSpec, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if v.Backend == "" {
allErrs = append(allErrs, field.Required(fldPath.Child("backend"), "Flannel backend must be specified"))
} else {
allErrs = append(allErrs, IsValidValue(fldPath.Child("backend"), &v.Backend, []string{"udp", "vxlan"})...)
}
return allErrs
}
func validateNetworkingCanal(v *kops.CanalNetworkingSpec, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if v.DefaultEndpointToHostAction != "" {
valid := []string{"ACCEPT", "DROP", "RETURN"}
allErrs = append(allErrs, IsValidValue(fldPath.Child("defaultEndpointToHostAction"), &v.DefaultEndpointToHostAction, valid)...)
}
if v.ChainInsertMode != "" {
valid := []string{"insert", "append"}
allErrs = append(allErrs, IsValidValue(fldPath.Child("chainInsertMode"), &v.ChainInsertMode, valid)...)
}
if v.LogSeveritySys != "" {
valid := []string{"INFO", "DEBUG", "WARNING", "ERROR", "CRITICAL", "NONE"}
allErrs = append(allErrs, IsValidValue(fldPath.Child("logSeveritySys"), &v.LogSeveritySys, valid)...)
}
if v.IptablesBackend != "" {
valid := []string{"Auto", "Legacy", "NFT"}
allErrs = append(allErrs, IsValidValue(fldPath.Child("iptablesBackend"), &v.IptablesBackend, valid)...)
}
return allErrs
}
func validateNetworkingCilium(cluster *kops.Cluster, v *kops.CiliumNetworkingSpec, fldPath *field.Path) field.ErrorList {
c := &cluster.Spec
allErrs := field.ErrorList{}
if v.Version != "" {
versionFld := fldPath.Child("version")
if !strings.HasPrefix(v.Version, "v") {
return append(allErrs, field.Invalid(versionFld, v.Version, "Cilium version must be prefixed with 'v'"))
}
versionString := strings.TrimPrefix(v.Version, "v")
version, err := semver.Parse(versionString)
version.Pre = nil
version.Build = nil
if err != nil {
allErrs = append(allErrs, field.Invalid(versionFld, v.Version, "Could not parse as semantic version"))
}
if !(version.Minor >= 6 && version.Minor <= 8) {
allErrs = append(allErrs, field.Invalid(versionFld, v.Version, "Only versions 1.6 through 1.8 are supported"))
}
if version.Minor == 6 && cluster.IsKubernetesGTE("1.16") {
allErrs = append(allErrs, field.Forbidden(versionFld, "Version 1.6 requires kubernetesVersion before 1.16"))
}
if version.Minor == 7 && cluster.IsKubernetesGTE("1.17") {
allErrs = append(allErrs, field.Forbidden(versionFld, "Version 1.7 requires kubernetesVersion before 1.17"))
}
if v.Hubble != nil && fi.BoolValue(v.Hubble.Enabled) {
if version.Minor < 8 {
allErrs = append(allErrs, field.Forbidden(fldPath.Root().Child("hubble", "enabled"), "Hubble requires Cilium 1.8 or newer"))
}
}
}
if v.EnableNodePort && c.KubeProxy != nil && (c.KubeProxy.Enabled == nil || *c.KubeProxy.Enabled) {
allErrs = append(allErrs, field.Forbidden(fldPath.Root().Child("spec", "kubeProxy", "enabled"), "When Cilium NodePort is enabled, kubeProxy must be disabled"))
}
if v.EnablePolicy != "" {
allErrs = append(allErrs, IsValidValue(fldPath.Child("enablePolicy"), &v.EnablePolicy, []string{"default", "always", "never"})...)
}
if v.Tunnel != "" {
allErrs = append(allErrs, IsValidValue(fldPath.Child("tunnel"), &v.Tunnel, []string{"vxlan", "geneve", "disabled"})...)
}
if v.MonitorAggregation != "" {
allErrs = append(allErrs, IsValidValue(fldPath.Child("monitorAggregation"), &v.MonitorAggregation, []string{"low", "medium", "maximum"})...)
}
if v.ContainerRuntimeLabels != "" {
allErrs = append(allErrs, IsValidValue(fldPath.Child("containerRuntimeLabels"), &v.ContainerRuntimeLabels, []string{"none", "containerd", "crio", "docker", "auto"})...)
}
if v.Ipam != "" {
// "azure" not supported by kops
allErrs = append(allErrs, IsValidValue(fldPath.Child("ipam"), &v.Ipam, []string{"hostscope", "kubernetes", "crd", "eni"})...)
if v.Ipam == kops.CiliumIpamEni {
if c.CloudProvider != string(kops.CloudProviderAWS) {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("ipam"), "Cilum ENI IPAM is supported only in AWS"))
}
if !v.DisableMasquerade {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("disableMasquerade"), "Masquerade must be disabled when ENI IPAM is used"))
}
}
}
if v.EtcdManaged {
hasCiliumCluster := false
for _, cluster := range c.EtcdClusters {
if cluster.Name == "cilium" {
if cluster.Provider == kops.EtcdProviderTypeLegacy {
allErrs = append(allErrs, field.Invalid(fldPath.Root().Child("etcdClusters"), kops.EtcdProviderTypeLegacy, "Legacy etcd provider is not supported for the cilium cluster"))
}
hasCiliumCluster = true
break
}
}
if !hasCiliumCluster {
allErrs = append(allErrs, field.Required(fldPath.Root().Child("etcdClusters"), "Cilium with managed etcd requires a dedicated etcd cluster"))
}
}
return allErrs
}
func validateNetworkingGCE(c *kops.ClusterSpec, v *kops.GCENetworkingSpec, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if c.CloudProvider != "gce" {
allErrs = append(allErrs, field.Forbidden(fldPath, "gce networking is supported only when on GCP"))
}
return allErrs
}
func validateAdditionalPolicy(role string, policy string, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
var valid []string
for _, r := range kops.AllInstanceGroupRoles {
valid = append(valid, strings.ToLower(string(r)))
}
allErrs = append(allErrs, IsValidValue(fldPath, &role, valid)...)
statements, err := iam.ParseStatements(policy)
if err != nil {
allErrs = append(allErrs, field.Invalid(fldPath.Key(role), policy, "policy was not valid JSON: "+err.Error()))
}
// Trivial validation of policy, mostly to make sure it isn't some other random object
for i, statement := range statements {
fldEffect := fldPath.Key(role).Index(i).Child("Effect")
if statement.Effect == "" {
allErrs = append(allErrs, field.Required(fldEffect, "Effect must be specified for IAM policy"))
} else {
value := string(statement.Effect)
allErrs = append(allErrs, IsValidValue(fldEffect, &value, []string{"Allow", "Deny"})...)
}
}
return allErrs
}
func validateExternalPolicies(role string, policies []string, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
var valid []string
for _, r := range kops.AllInstanceGroupRoles {
valid = append(valid, strings.ToLower(string(r)))
}
allErrs = append(allErrs, IsValidValue(fldPath, &role, valid)...)
for _, policy := range policies {
parsedARN, err := arn.Parse(policy)
if err != nil || !strings.HasPrefix(parsedARN.Resource, "policy/") {
allErrs = append(allErrs, field.Invalid(fldPath.Child(role), policy,
"Policy must be a valid AWS ARN such as arn:aws:iam::123456789012:policy/KopsExamplePolicy"))
}
}
return allErrs
}
func validateEtcdClusterSpec(spec kops.EtcdClusterSpec, c *kops.Cluster, fieldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if spec.Name == "" {
allErrs = append(allErrs, field.Required(fieldPath.Child("name"), "etcdCluster did not have name"))
}
if spec.Provider != "" {
value := string(spec.Provider)
allErrs = append(allErrs, IsValidValue(fieldPath.Child("provider"), &value, kops.SupportedEtcdProviderTypes)...)
if spec.Provider == kops.EtcdProviderTypeLegacy && c.IsKubernetesGTE("1.18") {
allErrs = append(allErrs, field.Forbidden(fieldPath.Child("provider"), "support for Legacy mode removed as of Kubernetes 1.18"))
}
}
if len(spec.Members) == 0 {
allErrs = append(allErrs, field.Required(fieldPath.Child("etcdMembers"), "No members defined in etcd cluster"))
} else if (len(spec.Members) % 2) == 0 {
// Not technically a requirement, but doesn't really make sense to allow
allErrs = append(allErrs, field.Invalid(fieldPath.Child("etcdMembers"), len(spec.Members), "Should be an odd number of master-zones for quorum. Use --zones and --master-zones to declare node zones and master zones separately"))
}
allErrs = append(allErrs, validateEtcdVersion(spec, fieldPath, nil)...)
for i, m := range spec.Members {
allErrs = append(allErrs, validateEtcdMemberSpec(m, fieldPath.Child("etcdMembers").Index(i))...)
}
return allErrs
}
// validateEtcdBackupStore checks that the etcd clusters backupStore path is unique.
func validateEtcdBackupStore(specs []kops.EtcdClusterSpec, fieldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
etcdBackupStore := make(map[string]bool)
for _, x := range specs {
if _, alreadyUsed := etcdBackupStore[x.Name]; alreadyUsed {
allErrs = append(allErrs, field.Forbidden(fieldPath.Index(0).Child("backupStore"), "the backup store must be unique for each etcd cluster"))
}
etcdBackupStore[x.Name] = true
}
return allErrs
}
// validateEtcdTLS checks the TLS settings for etcd are valid
func validateEtcdTLS(specs []kops.EtcdClusterSpec, fieldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
var usingTLS int
for _, x := range specs {
if x.EnableEtcdTLS {
usingTLS++
}
}
// check both clusters are using tls if one is enabled
if usingTLS > 0 && usingTLS != len(specs) {
allErrs = append(allErrs, field.Forbidden(fieldPath.Index(0).Child("enableEtcdTLS"), "both etcd clusters must have TLS enabled or none at all"))
}
return allErrs
}
// validateEtcdStorage is responsible for checking versions are identical.
func validateEtcdStorage(specs []kops.EtcdClusterSpec, fieldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
version := specs[0].Version
for i, x := range specs {
if x.Version != "" && x.Version != version {
allErrs = append(allErrs, field.Forbidden(fieldPath.Index(i).Child("version"), fmt.Sprintf("cluster: %q, has a different storage version: %q, both must be the same", x.Name, x.Version)))
}
}
return allErrs
}
// validateEtcdVersion is responsible for validating the storage version of etcd
// @TODO semvar package doesn't appear to ignore a 'v' in v1.1.1; could be a problem later down the line
func validateEtcdVersion(spec kops.EtcdClusterSpec, fieldPath *field.Path, minimalVersion *semver.Version) field.ErrorList {
// @check if the storage is specified that it's valid
if minimalVersion == nil {
v := semver.MustParse("0.0.0")
minimalVersion = &v
}
version := spec.Version
if spec.Version == "" {
version = components.DefaultEtcd3Version_1_13
}
sem, err := semver.Parse(strings.TrimPrefix(version, "v"))
if err != nil {
return field.ErrorList{field.Invalid(fieldPath.Child("version"), version, "the storage version is invalid")}
}
// we only support v3 for now
if sem.Major == 3 {
if sem.LT(*minimalVersion) {
return field.ErrorList{field.Invalid(fieldPath.Child("version"), version, fmt.Sprintf("minimum version required is %s", minimalVersion.String()))}
}
return nil
}
return field.ErrorList{field.Invalid(fieldPath.Child("version"), version, "unsupported storage version, we only support major version 3")}
}
// validateEtcdMemberSpec is responsible for validate the cluster member
func validateEtcdMemberSpec(spec kops.EtcdMemberSpec, fieldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if spec.Name == "" {
allErrs = append(allErrs, field.Required(fieldPath.Child("name"), "etcdMember did not have name"))
}
if fi.StringValue(spec.InstanceGroup) == "" {
allErrs = append(allErrs, field.Required(fieldPath.Child("instanceGroup"), "etcdMember did not have instanceGroup"))
}
return allErrs
}
func validateNetworkingCalico(v *kops.CalicoNetworkingSpec, e kops.EtcdClusterSpec, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if v.AWSSrcDstCheck != "" {
valid := []string{"Enable", "Disable", "DoNothing"}
allErrs = append(allErrs, IsValidValue(fldPath.Child("awsSrcDstCheck"), &v.AWSSrcDstCheck, valid)...)
}
if v.BPFExternalServiceMode != "" {
valid := []string{"Tunnel", "DSR"}
allErrs = append(allErrs, IsValidValue(fldPath.Child("bpfExternalServiceMode"), &v.BPFExternalServiceMode, valid)...)
}
if v.BPFLogLevel != "" {
valid := []string{"Off", "Info", "Debug"}
allErrs = append(allErrs, IsValidValue(fldPath.Child("bpfLogLevel"), &v.BPFLogLevel, valid)...)
}
if v.ChainInsertMode != "" {
valid := []string{"insert", "append"}
allErrs = append(allErrs, IsValidValue(fldPath.Child("chainInsertMode"), &v.ChainInsertMode, valid)...)
}
if v.EncapsulationMode != "" {
// Don't tolerate "None" for now, which would disable encapsulation in the default IPPool
// object. Note that with no encapsulation, we'd need to select the "bird" networking
// backend in order to allow use of BGP to distribute routes for pod traffic.
valid := []string{"ipip", "vxlan"}
allErrs = append(allErrs, IsValidValue(fldPath.Child("encapsulationMode"), &v.EncapsulationMode, valid)...)
}
if v.IPIPMode != "" {
child := fldPath.Child("ipipMode")
allErrs = append(allErrs, validateCalicoIPPoolEncapsulationMode(v.IPIPMode, child)...)
if v.IPIPMode != "Never" {
if v.EncapsulationMode != "" && v.EncapsulationMode != "ipip" {
allErrs = append(allErrs, field.Forbidden(child, `IP-in-IP encapsulation requires use of Calico's "ipip" encapsulation mode`))
}
}
}
if v.IPv4AutoDetectionMethod != "" {
allErrs = append(allErrs, validateCalicoAutoDetectionMethod(fldPath.Child("ipv4AutoDetectionMethod"), v.IPv4AutoDetectionMethod, ipv4.Version)...)
}
if v.IPv6AutoDetectionMethod != "" {
allErrs = append(allErrs, validateCalicoAutoDetectionMethod(fldPath.Child("ipv6AutoDetectionMethod"), v.IPv6AutoDetectionMethod, ipv6.Version)...)
}
if v.IptablesBackend != "" {
valid := []string{"Auto", "Legacy", "NFT"}
allErrs = append(allErrs, IsValidValue(fldPath.Child("iptablesBackend"), &v.IptablesBackend, valid)...)
}