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new_cluster.go
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new_cluster.go
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/*
Copyright 2020 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 cloudup
import (
"fmt"
"strconv"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/blang/semver/v4"
"k8s.io/apimachinery/pkg/api/resource"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/klog/v2"
"k8s.io/kops"
api "k8s.io/kops/pkg/apis/kops"
"k8s.io/kops/pkg/apis/kops/model"
"k8s.io/kops/pkg/apis/kops/util"
"k8s.io/kops/pkg/client/simple"
"k8s.io/kops/pkg/clouds"
"k8s.io/kops/pkg/featureflag"
"k8s.io/kops/upup/pkg/fi"
"k8s.io/kops/upup/pkg/fi/cloudup/awsup"
"k8s.io/kops/upup/pkg/fi/cloudup/azure"
"k8s.io/kops/upup/pkg/fi/cloudup/gce"
"k8s.io/kops/upup/pkg/fi/cloudup/openstack"
"k8s.io/kops/util/pkg/architectures"
"k8s.io/kops/util/pkg/vfs"
)
const (
AuthorizationFlagAlwaysAllow = "AlwaysAllow"
AuthorizationFlagRBAC = "RBAC"
)
type NewClusterOptions struct {
// ClusterName is the name of the cluster to initialize.
ClusterName string
// Authorization is the authorization mode to use. The options are "RBAC" (default) and "AlwaysAllow".
Authorization string
// Channel is a channel location for initializing the cluster. It defaults to "stable".
Channel string
// ConfigBase is the location where we will store the configuration. It defaults to the state store.
ConfigBase string
// DiscoveryStore is the location where we will store public OIDC-compatible discovery documents, under a cluster-specific directory. It defaults to not publishing discovery documents.
DiscoveryStore string
// KubernetesVersion is the version of Kubernetes to deploy. It defaults to the version recommended by the channel.
KubernetesVersion string
// KubernetesFeatureGates is the list of Kubernetes feature gates to enable/disable.
KubernetesFeatureGates []string
// AdminAccess is the set of CIDR blocks permitted to connect to the Kubernetes API. It defaults to "0.0.0.0/0" and "::/0".
AdminAccess []string
// SSHAccess is the set of CIDR blocks permitted to connect to SSH on the nodes. It defaults to the value of AdminAccess.
SSHAccess []string
// CloudProvider is the name of the cloud provider. The default is to guess based on the Zones name.
CloudProvider string
// Zones are the availability zones in which to run the cluster.
Zones []string
// ControlPlaneZones are the availability zones in which to run the control-plane nodes. Defaults to the list in the Zones field.
ControlPlaneZones []string
// Project is the cluster's GCE project.
Project string
// GCEServiceAccount specifies the service account with which the GCE VM runs.
GCEServiceAccount string
// Spotinst options
SpotinstProduct string
SpotinstOrientation string
// NetworkID is the ID of the shared network (VPC).
// If empty, SubnetIDs are not empty, and on AWS or OpenStack, determines network ID from the first SubnetID.
// If empty otherwise, creates a new network/VPC to be owned by the cluster.
NetworkID string
// SubnetIDs are the IDs of the shared subnets.
// If empty, creates new subnets to be owned by the cluster.
SubnetIDs []string
// UtilitySubnetIDs are the IDs of the shared utility subnets. If empty and the topology is "private", creates new subnets to be owned by the cluster.
UtilitySubnetIDs []string
// Egress defines the method of traffic egress for subnets.
Egress string
// IPv6 adds IPv6 CIDRs to subnets
IPv6 bool
// OpenstackExternalNet is the name of the external network for the openstack router.
OpenstackExternalNet string
OpenstackExternalSubnet string
OpenstackStorageIgnoreAZ bool
OpenstackDNSServers string
OpenstackLBSubnet string
// OpenstackLBOctavia is whether to use use octavia instead of haproxy.
OpenstackLBOctavia bool
OpenstackOctaviaProvider string
AzureSubscriptionID string
AzureTenantID string
AzureResourceGroupName string
AzureRouteTableName string
AzureAdminUser string
// ControlPlaneCount is the number of control-plane nodes to create. Defaults to the length of ControlPlaneZones.
// if ControlPlaneZones is explicitly nonempty, otherwise defaults to 1.
ControlPlaneCount int32
// APIServerCount is the number of API servers to create. Defaults to 0.
APIServerCount int32
// EncryptEtcdStorage is whether to encrypt the etcd volumes.
EncryptEtcdStorage *bool
// EtcdStorageType is the underlying cloud storage class of the etcd volumes.
EtcdStorageType string
// NodeCount is the number of nodes to create. Defaults to leaving the count unspecified
// on the InstanceGroup, which results in a count of 2.
NodeCount int32
// Bastion enables the creation of a Bastion instance.
Bastion bool
// BastionLoadBalancerType is the bastion loadbalancer type to use; "public" or "internal".
// Defaults to "public".
BastionLoadBalancerType string
// Networking is the networking provider/node to use.
Networking string
// Topology is the network topology to use. Defaults to "public" for IPv4 clusters and "private" for IPv6 clusters.
Topology string
// DNSType is the DNS type to use; "public" or "private". Defaults to "public".
DNSType string
// APILoadBalancerClass determines whether to use classic or network load balancers for the API
APILoadBalancerClass string
// APILoadBalancerType is the Kubernetes API loadbalancer type to use; "public" or "internal".
// Defaults to using DNS instead of a load balancer if using public topology and not gossip, otherwise "public".
APILoadBalancerType string
// APISSLCertificate is the SSL certificate to use for the API loadbalancer.
// Currently only supported in AWS.
APISSLCertificate string
// InstanceManager specifies which manager to use for managing instances.
InstanceManager string
Image string
NodeImage string
ControlPlaneImage string
BastionImage string
ControlPlaneSize string
NodeSize string
}
func (o *NewClusterOptions) InitDefaults() {
o.Channel = api.DefaultChannel
o.Authorization = AuthorizationFlagRBAC
o.AdminAccess = []string{"0.0.0.0/0", "::/0"}
o.Networking = "cilium"
o.InstanceManager = "cloudgroups"
}
type NewClusterResult struct {
// Cluster is the initialized Cluster resource.
Cluster *api.Cluster
// InstanceGroups are the initialized InstanceGroup resources.
InstanceGroups []*api.InstanceGroup
// Channel is the loaded Channel object.
Channel *api.Channel
}
// NewCluster initializes cluster and instance groups specifications as
// intended for newly created clusters.
// It is the responsibility of the caller to call cloudup.PerformAssignments() on
// the returned cluster spec.
func NewCluster(opt *NewClusterOptions, clientset simple.Clientset) (*NewClusterResult, error) {
if opt.ClusterName == "" {
return nil, fmt.Errorf("name is required")
}
if opt.Channel == "" {
opt.Channel = api.DefaultChannel
}
channel, err := api.LoadChannel(opt.Channel)
if err != nil {
return nil, err
}
cluster := &api.Cluster{
ObjectMeta: v1.ObjectMeta{
Name: opt.ClusterName,
},
}
cluster.Spec.Channel = opt.Channel
if opt.KubernetesVersion == "" {
kubernetesVersion := api.RecommendedKubernetesVersion(channel, kops.Version)
if kubernetesVersion != nil {
cluster.Spec.KubernetesVersion = kubernetesVersion.String()
}
} else {
cluster.Spec.KubernetesVersion = opt.KubernetesVersion
}
cluster.Spec.ConfigBase = opt.ConfigBase
configBase, err := clientset.ConfigBaseFor(cluster)
if err != nil {
return nil, fmt.Errorf("error building ConfigBase for cluster: %v", err)
}
cluster.Spec.ConfigBase = configBase.Path()
cluster.Spec.Authorization = &api.AuthorizationSpec{}
if strings.EqualFold(opt.Authorization, AuthorizationFlagAlwaysAllow) {
cluster.Spec.Authorization.AlwaysAllow = &api.AlwaysAllowAuthorizationSpec{}
} else if opt.Authorization == "" || strings.EqualFold(opt.Authorization, AuthorizationFlagRBAC) {
cluster.Spec.Authorization.RBAC = &api.RBACAuthorizationSpec{}
} else {
return nil, fmt.Errorf("unknown authorization mode %q", opt.Authorization)
}
cluster.Spec.IAM = &api.IAMSpec{
AllowContainerRegistry: true,
}
cluster.Spec.Kubelet = &api.KubeletConfigSpec{
AnonymousAuth: fi.PtrTo(false),
}
if len(opt.KubernetesFeatureGates) > 0 {
cluster.Spec.Kubelet.FeatureGates = make(map[string]string)
cluster.Spec.KubeAPIServer = &api.KubeAPIServerConfig{
FeatureGates: make(map[string]string),
}
cluster.Spec.KubeControllerManager = &api.KubeControllerManagerConfig{
FeatureGates: make(map[string]string),
}
cluster.Spec.KubeProxy = &api.KubeProxyConfig{
FeatureGates: make(map[string]string),
}
cluster.Spec.KubeScheduler = &api.KubeSchedulerConfig{
FeatureGates: make(map[string]string),
}
for _, featureGate := range opt.KubernetesFeatureGates {
enabled := true
if featureGate[0] == '+' {
featureGate = featureGate[1:]
}
if featureGate[0] == '-' {
enabled = false
featureGate = featureGate[1:]
}
cluster.Spec.Kubelet.FeatureGates[featureGate] = strconv.FormatBool(enabled)
cluster.Spec.KubeAPIServer.FeatureGates[featureGate] = strconv.FormatBool(enabled)
cluster.Spec.KubeControllerManager.FeatureGates[featureGate] = strconv.FormatBool(enabled)
cluster.Spec.KubeProxy.FeatureGates[featureGate] = strconv.FormatBool(enabled)
cluster.Spec.KubeScheduler.FeatureGates[featureGate] = strconv.FormatBool(enabled)
}
}
if len(opt.AdminAccess) == 0 {
opt.AdminAccess = []string{"0.0.0.0/0", "::/0"}
}
cluster.Spec.API.Access = opt.AdminAccess
if len(opt.SSHAccess) != 0 {
cluster.Spec.SSHAccess = opt.SSHAccess
} else {
cluster.Spec.SSHAccess = opt.AdminAccess
}
if len(opt.Zones) == 0 {
return nil, fmt.Errorf("must specify at least one zone for the cluster (use --zones)")
}
allZones := sets.NewString()
allZones.Insert(opt.Zones...)
allZones.Insert(opt.ControlPlaneZones...)
if opt.CloudProvider == "" {
cloud, err := clouds.GuessCloudForPath(cluster.Spec.ConfigBase)
if err != nil {
return nil, fmt.Errorf("pass in the cloud provider explicitly using --cloud: %w", err)
}
klog.V(2).Infof("Inferred %q cloud provider from state store %q", cloud, cluster.Spec.ConfigBase)
opt.CloudProvider = string(cloud)
}
var cloud fi.Cloud
switch api.CloudProviderID(opt.CloudProvider) {
case api.CloudProviderAWS:
cluster.Spec.CloudProvider.AWS = &api.AWSSpec{}
cloudTags := map[string]string{}
awsCloud, err := awsup.NewAWSCloud(opt.Zones[0][:len(opt.Zones[0])-1], cloudTags)
if err != nil {
return nil, err
}
cloud = awsCloud
case api.CloudProviderAzure:
cluster.Spec.CloudProvider.Azure = &api.AzureSpec{
SubscriptionID: opt.AzureSubscriptionID,
TenantID: opt.AzureTenantID,
ResourceGroupName: opt.AzureResourceGroupName,
RouteTableName: opt.AzureRouteTableName,
AdminUser: opt.AzureAdminUser,
}
case api.CloudProviderDO:
cluster.Spec.CloudProvider.DO = &api.DOSpec{}
case api.CloudProviderGCE:
cluster.Spec.CloudProvider.GCE = &api.GCESpec{}
case api.CloudProviderHetzner:
cluster.Spec.CloudProvider.Hetzner = &api.HetznerSpec{}
case api.CloudProviderOpenstack:
cluster.Spec.CloudProvider.Openstack = &api.OpenstackSpec{
Router: &api.OpenstackRouter{
ExternalNetwork: fi.PtrTo(opt.OpenstackExternalNet),
},
BlockStorage: &api.OpenstackBlockStorageConfig{
Version: fi.PtrTo("v3"),
IgnoreAZ: fi.PtrTo(opt.OpenstackStorageIgnoreAZ),
ClusterName: opt.ClusterName,
},
Monitor: &api.OpenstackMonitor{
Delay: fi.PtrTo("15s"),
Timeout: fi.PtrTo("10s"),
MaxRetries: fi.PtrTo(3),
},
}
initializeOpenstack(opt, cluster)
osCloud, err := openstack.NewOpenstackCloud(cluster, "openstackmodel")
if err != nil {
return nil, err
}
cloud = osCloud
case api.CloudProviderScaleway:
cluster.Spec.CloudProvider.Scaleway = &api.ScalewaySpec{}
default:
return nil, fmt.Errorf("unsupported cloud provider %s", opt.CloudProvider)
}
if opt.DiscoveryStore != "" {
discoveryPath, err := vfs.Context.BuildVfsPath(opt.DiscoveryStore)
if err != nil {
return nil, fmt.Errorf("error building DiscoveryStore for cluster: %v", err)
}
cluster.Spec.ServiceAccountIssuerDiscovery = &api.ServiceAccountIssuerDiscoveryConfig{
DiscoveryStore: discoveryPath.Join(cluster.Name).Path(),
}
if cluster.Spec.GetCloudProvider() == api.CloudProviderAWS {
cluster.Spec.ServiceAccountIssuerDiscovery.EnableAWSOIDCProvider = true
cluster.Spec.IAM.UseServiceAccountExternalPermissions = fi.PtrTo(true)
}
}
err = setupVPC(opt, cluster, cloud)
if err != nil {
return nil, err
}
zoneToSubnetMap, err := setupZones(opt, cluster, allZones)
if err != nil {
return nil, err
}
err = setupNetworking(opt, cluster)
if err != nil {
return nil, err
}
bastions, err := setupTopology(opt, cluster, allZones)
if err != nil {
return nil, err
}
controlPlanes, err := setupControlPlane(opt, cluster, zoneToSubnetMap)
if err != nil {
return nil, err
}
var nodes []*api.InstanceGroup
switch opt.InstanceManager {
case "karpenter":
if opt.DiscoveryStore == "" {
return nil, fmt.Errorf("karpenter requires --discovery-store")
}
cluster.Spec.Karpenter = &api.KarpenterConfig{
Enabled: true,
}
nodes, err = setupKarpenterNodes(opt, cluster, zoneToSubnetMap)
if err != nil {
return nil, err
}
case "cloudgroups":
nodes, err = setupNodes(opt, cluster, zoneToSubnetMap)
if err != nil {
return nil, err
}
default:
return nil, fmt.Errorf("invalid value %q for --instance-manager", opt.InstanceManager)
}
apiservers, err := setupAPIServers(opt, cluster, zoneToSubnetMap)
if err != nil {
return nil, err
}
err = setupAPI(opt, cluster)
if err != nil {
return nil, err
}
instanceGroups := append([]*api.InstanceGroup(nil), controlPlanes...)
instanceGroups = append(instanceGroups, apiservers...)
instanceGroups = append(instanceGroups, nodes...)
instanceGroups = append(instanceGroups, bastions...)
for _, instanceGroup := range instanceGroups {
g := instanceGroup
ig := g
if instanceGroup.Spec.Image == "" {
if opt.Image != "" {
instanceGroup.Spec.Image = opt.Image
} else {
architecture, err := MachineArchitecture(cloud, instanceGroup.Spec.MachineType)
if err != nil {
return nil, err
}
instanceGroup.Spec.Image, err = defaultImage(cluster, channel, architecture)
if err != nil {
return nil, err
}
}
}
// TODO: Clean up
if g.IsControlPlane() {
if g.Spec.MachineType == "" {
g.Spec.MachineType, err = defaultMachineType(cloud, cluster, ig)
if err != nil {
return nil, fmt.Errorf("error assigning default machine type for control plane: %v", err)
}
}
} else if g.Spec.Role == api.InstanceGroupRoleBastion {
if g.Spec.MachineType == "" {
g.Spec.MachineType, err = defaultMachineType(cloud, cluster, g)
if err != nil {
return nil, fmt.Errorf("error assigning default machine type for bastions: %v", err)
}
}
} else {
if g.IsAPIServerOnly() && !featureflag.APIServerNodes.Enabled() {
return nil, fmt.Errorf("apiserver nodes requires the APIServerNodes feature flag to be enabled")
}
if g.Spec.MachineType == "" {
g.Spec.MachineType, err = defaultMachineType(cloud, cluster, g)
if err != nil {
return nil, fmt.Errorf("error assigning default machine type for nodes: %v", err)
}
}
}
if ig.Spec.Tenancy != "" && ig.Spec.Tenancy != "default" {
switch cluster.Spec.GetCloudProvider() {
case api.CloudProviderAWS:
if _, ok := awsDedicatedInstanceExceptions[g.Spec.MachineType]; ok {
return nil, fmt.Errorf("invalid dedicated instance type: %s", g.Spec.MachineType)
}
default:
klog.Warning("Trying to set tenancy on non-AWS environment")
}
}
if ig.IsControlPlane() {
if len(ig.Spec.Subnets) == 0 {
return nil, fmt.Errorf("control-plane InstanceGroup %s did not specify any Subnets", g.ObjectMeta.Name)
}
} else if ig.IsAPIServerOnly() && cluster.Spec.IsIPv6Only() {
if len(ig.Spec.Subnets) == 0 {
for _, subnet := range cluster.Spec.Networking.Subnets {
if subnet.Type != api.SubnetTypePrivate && subnet.Type != api.SubnetTypeUtility {
ig.Spec.Subnets = append(g.Spec.Subnets, subnet.Name)
}
}
}
} else {
if len(ig.Spec.Subnets) == 0 {
for _, subnet := range cluster.Spec.Networking.Subnets {
if subnet.Type != api.SubnetTypeDualStack && subnet.Type != api.SubnetTypeUtility {
g.Spec.Subnets = append(g.Spec.Subnets, subnet.Name)
}
}
}
if len(g.Spec.Subnets) == 0 {
for _, subnet := range cluster.Spec.Networking.Subnets {
if subnet.Type != api.SubnetTypeUtility {
g.Spec.Subnets = append(g.Spec.Subnets, subnet.Name)
}
}
}
}
if len(g.Spec.Subnets) == 0 {
return nil, fmt.Errorf("unable to infer any Subnets for InstanceGroup %s ", g.ObjectMeta.Name)
}
}
result := NewClusterResult{
Cluster: cluster,
InstanceGroups: instanceGroups,
Channel: channel,
}
return &result, nil
}
func setupVPC(opt *NewClusterOptions, cluster *api.Cluster, cloud fi.Cloud) error {
cluster.Spec.Networking.NetworkID = opt.NetworkID
switch cluster.Spec.GetCloudProvider() {
case api.CloudProviderAWS:
if cluster.Spec.Networking.NetworkID == "" && len(opt.SubnetIDs) > 0 {
awsCloud := cloud.(awsup.AWSCloud)
res, err := awsCloud.EC2().DescribeSubnets(&ec2.DescribeSubnetsInput{
SubnetIds: []*string{aws.String(opt.SubnetIDs[0])},
})
if err != nil {
return fmt.Errorf("error describing subnet %s: %v", opt.SubnetIDs[0], err)
}
if len(res.Subnets) == 0 || res.Subnets[0].VpcId == nil {
return fmt.Errorf("failed to determine VPC id of subnet %s", opt.SubnetIDs[0])
}
cluster.Spec.Networking.NetworkID = *res.Subnets[0].VpcId
}
case api.CloudProviderGCE:
if cluster.Spec.CloudConfig == nil {
cluster.Spec.CloudConfig = &api.CloudConfiguration{}
}
cluster.Spec.CloudProvider.GCE.Project = opt.Project
if cluster.Spec.CloudProvider.GCE.Project == "" {
project, err := gce.DefaultProject()
if err != nil {
klog.Warningf("unable to get default google cloud project: %v", err)
} else if project == "" {
klog.Warningf("default google cloud project not set (try `gcloud config set project <name>`")
} else {
klog.Infof("using google cloud project: %s", project)
}
cluster.Spec.CloudProvider.GCE.Project = project
}
if opt.GCEServiceAccount != "" {
// TODO remove this logging?
klog.Infof("VMs will be configured to use specified Service Account: %v", opt.GCEServiceAccount)
cluster.Spec.CloudProvider.GCE.ServiceAccount = opt.GCEServiceAccount
}
case api.CloudProviderOpenstack:
if cluster.Spec.CloudConfig == nil {
cluster.Spec.CloudConfig = &api.CloudConfiguration{}
}
if cluster.Spec.Networking.NetworkID == "" && len(opt.SubnetIDs) > 0 {
osCloud, err := openstack.NewOpenstackCloud(cluster, "new-cluster-setupvpc")
if err != nil {
return fmt.Errorf("error loading cloud: %v", err)
}
res, err := osCloud.FindNetworkBySubnetID(opt.SubnetIDs[0])
if err != nil {
return fmt.Errorf("error finding network: %v", err)
}
cluster.Spec.Networking.NetworkID = res.ID
}
if opt.OpenstackDNSServers != "" {
cluster.Spec.CloudProvider.Openstack.Router.DNSServers = fi.PtrTo(opt.OpenstackDNSServers)
}
if opt.OpenstackExternalSubnet != "" {
cluster.Spec.CloudProvider.Openstack.Router.ExternalSubnet = fi.PtrTo(opt.OpenstackExternalSubnet)
}
case api.CloudProviderAzure:
// TODO(kenji): Find a right place for this.
// Creating an empty CloudConfig so that --cloud-config is passed to kubelet, api-server, etc.
if cluster.Spec.CloudConfig == nil {
cluster.Spec.CloudConfig = &api.CloudConfiguration{}
}
}
if featureflag.Spotinst.Enabled() {
if cluster.Spec.CloudConfig == nil {
cluster.Spec.CloudConfig = &api.CloudConfiguration{}
}
if opt.SpotinstProduct != "" {
cluster.Spec.CloudConfig.SpotinstProduct = fi.PtrTo(opt.SpotinstProduct)
}
if opt.SpotinstOrientation != "" {
cluster.Spec.CloudConfig.SpotinstOrientation = fi.PtrTo(opt.SpotinstOrientation)
}
}
return nil
}
func setupZones(opt *NewClusterOptions, cluster *api.Cluster, allZones sets.String) (map[string]*api.ClusterSubnetSpec, error) {
var err error
zoneToSubnetMap := make(map[string]*api.ClusterSubnetSpec)
var zoneToSubnetProviderID map[string]string
switch cluster.Spec.GetCloudProvider() {
case api.CloudProviderGCE:
// On GCE, subnets are regional - we create one per region, not per zone
for _, zoneName := range allZones.List() {
region, err := gce.ZoneToRegion(zoneName)
if err != nil {
return nil, err
}
// We create default subnets named the same as the regions
subnetName := region
subnet := model.FindSubnet(cluster, subnetName)
if subnet == nil {
subnet = &api.ClusterSubnetSpec{
Name: subnetName,
Region: region,
}
if len(opt.SubnetIDs) != 0 {
// We don't support multi-region clusters, so we can't have more than one subnet
if len(opt.SubnetIDs) != 1 {
return nil, fmt.Errorf("expected exactly one subnet for GCE, got %d", len(opt.SubnetIDs))
}
subnet.ID = opt.SubnetIDs[0]
}
cluster.Spec.Networking.Subnets = append(cluster.Spec.Networking.Subnets, *subnet)
}
zoneToSubnetMap[zoneName] = subnet
}
return zoneToSubnetMap, nil
case api.CloudProviderDO:
if len(opt.Zones) > 1 {
return nil, fmt.Errorf("digitalocean cloud provider currently supports one region only.")
}
// For DO we just pass in the region for --zones
region := opt.Zones[0]
subnet := model.FindSubnet(cluster, region)
// for DO, subnets are just regions
subnetName := region
if subnet == nil {
subnet = &api.ClusterSubnetSpec{
Name: subnetName,
// region and zone are the same for DO
Region: region,
Zone: region,
}
cluster.Spec.Networking.Subnets = append(cluster.Spec.Networking.Subnets, *subnet)
}
zoneToSubnetMap[region] = subnet
return zoneToSubnetMap, nil
case api.CloudProviderHetzner:
if len(opt.Zones) > 1 {
return nil, fmt.Errorf("hetzner cloud provider currently supports only one zone (location)")
}
// TODO(hakman): Add customizations for Hetzner Cloud
case api.CloudProviderAzure:
// On Azure, subnets are regional - we create one per region, not per zone
for _, zoneName := range allZones.List() {
location, err := azure.ZoneToLocation(zoneName)
if err != nil {
return nil, err
}
// We create default subnets named the same as the regions
subnetName := location
subnet := model.FindSubnet(cluster, subnetName)
if subnet == nil {
subnet = &api.ClusterSubnetSpec{
Name: subnetName,
Region: location,
}
cluster.Spec.Networking.Subnets = append(cluster.Spec.Networking.Subnets, *subnet)
}
zoneToSubnetMap[zoneName] = subnet
}
return zoneToSubnetMap, nil
case api.CloudProviderAWS:
if len(opt.Zones) > 0 && len(opt.SubnetIDs) > 0 {
zoneToSubnetProviderID, err = getAWSZoneToSubnetProviderID(cluster.Spec.Networking.NetworkID, opt.Zones[0][:len(opt.Zones[0])-1], opt.SubnetIDs)
if err != nil {
return nil, err
}
}
case api.CloudProviderOpenstack:
if len(opt.Zones) > 0 && len(opt.SubnetIDs) > 0 {
zoneToSubnetProviderID, err = getOpenstackZoneToSubnetProviderID(cluster, allZones.List(), opt.SubnetIDs)
if err != nil {
return nil, err
}
}
case api.CloudProviderScaleway:
if len(opt.Zones) > 1 {
return nil, fmt.Errorf("scaleway cloud provider currently supports only one availability zone")
}
}
for _, zoneName := range allZones.List() {
// We create default subnets named the same as the zones
subnetName := zoneName
subnet := model.FindSubnet(cluster, subnetName)
if subnet == nil {
subnet = &api.ClusterSubnetSpec{
Name: subnetName,
Zone: subnetName,
Egress: opt.Egress,
}
if subnetID, ok := zoneToSubnetProviderID[zoneName]; ok {
subnet.ID = subnetID
}
cluster.Spec.Networking.Subnets = append(cluster.Spec.Networking.Subnets, *subnet)
}
zoneToSubnetMap[zoneName] = subnet
}
return zoneToSubnetMap, nil
}
func getAWSZoneToSubnetProviderID(VPCID string, region string, subnetIDs []string) (map[string]string, error) {
res := make(map[string]string)
cloudTags := map[string]string{}
awsCloud, err := awsup.NewAWSCloud(region, cloudTags)
if err != nil {
return res, fmt.Errorf("error loading cloud: %v", err)
}
vpcInfo, err := awsCloud.FindVPCInfo(VPCID)
if err != nil {
return res, fmt.Errorf("error describing VPC: %v", err)
}
if vpcInfo == nil {
return res, fmt.Errorf("VPC %q not found", VPCID)
}
subnetByID := make(map[string]*fi.SubnetInfo)
for _, subnetInfo := range vpcInfo.Subnets {
subnetByID[subnetInfo.ID] = subnetInfo
}
for _, subnetID := range subnetIDs {
subnet, ok := subnetByID[subnetID]
if !ok {
return res, fmt.Errorf("subnet %s not found in VPC %s", subnetID, VPCID)
}
if res[subnet.Zone] != "" {
return res, fmt.Errorf("subnet %s and %s have the same zone", subnetID, res[subnet.Zone])
}
res[subnet.Zone] = subnetID
}
return res, nil
}
func getOpenstackZoneToSubnetProviderID(cluster *api.Cluster, zones []string, subnetIDs []string) (map[string]string, error) {
res := make(map[string]string)
osCloud, err := openstack.NewOpenstackCloud(cluster, "new-cluster-zone-to-subnet")
if err != nil {
return res, fmt.Errorf("error loading cloud: %v", err)
}
osCloud.UseZones(zones)
networkInfo, err := osCloud.FindVPCInfo(cluster.Spec.Networking.NetworkID)
if err != nil {
return res, fmt.Errorf("error describing Network: %v", err)
}
if networkInfo == nil {
return res, fmt.Errorf("network %q not found", cluster.Spec.Networking.NetworkID)
}
subnetByID := make(map[string]*fi.SubnetInfo)
for _, subnetInfo := range networkInfo.Subnets {
subnetByID[subnetInfo.ID] = subnetInfo
}
for _, subnetID := range subnetIDs {
subnet, ok := subnetByID[subnetID]
if !ok {
return res, fmt.Errorf("subnet %s not found in network %s", subnetID, cluster.Spec.Networking.NetworkID)
}
if res[subnet.Zone] != "" {
return res, fmt.Errorf("subnet %s and %s have the same zone", subnetID, res[subnet.Zone])
}
res[subnet.Zone] = subnetID
}
return res, nil
}
func setupControlPlane(opt *NewClusterOptions, cluster *api.Cluster, zoneToSubnetMap map[string]*api.ClusterSubnetSpec) ([]*api.InstanceGroup, error) {
cloudProvider := cluster.Spec.GetCloudProvider()
var controlPlanes []*api.InstanceGroup
// Build the control-plane subnets.
// The control-plane zones is the default set of zones unless explicitly set.
// The control-plane count is the number of control-plane zones unless explicitly set.
// We then round-robin around the zones.
{
controlPlaneCount := opt.ControlPlaneCount
controlPlaneZones := opt.ControlPlaneZones
if len(controlPlaneZones) != 0 {
if controlPlaneCount != 0 && controlPlaneCount < int32(len(controlPlaneZones)) {
return nil, fmt.Errorf("specified %d control-plane zones, but also requested %d control-plane nodes. If specifying both, the count should match.", len(controlPlaneZones), controlPlaneCount)
}
if controlPlaneCount == 0 {
// If control-plane count is not specified, default to the number of control-plane zones
controlPlaneCount = int32(len(controlPlaneZones))
}
} else {
// controlPlaneZones not set; default to same as node Zones
controlPlaneZones = opt.Zones
if controlPlaneCount == 0 {
// If control-plane count is not specified, default to 1
controlPlaneCount = 1
}
}
if len(controlPlaneZones) == 0 {
// Should be unreachable
return nil, fmt.Errorf("cannot determine control-plane zones")
}
for i := 0; i < int(controlPlaneCount); i++ {
zone := controlPlaneZones[i%len(controlPlaneZones)]
name := zone
if cloudProvider == api.CloudProviderDO {
if int(controlPlaneCount) >= len(controlPlaneZones) {
name += "-" + strconv.Itoa(1+(i/len(controlPlaneZones)))
}
} else {
if int(controlPlaneCount) > len(controlPlaneZones) {
name += "-" + strconv.Itoa(1+(i/len(controlPlaneZones)))
}
}
g := &api.InstanceGroup{}
g.Spec.Role = api.InstanceGroupRoleControlPlane
g.Spec.MinSize = fi.PtrTo(int32(1))
g.Spec.MaxSize = fi.PtrTo(int32(1))
g.ObjectMeta.Name = "control-plane-" + name
subnet := zoneToSubnetMap[zone]
if subnet == nil {
klog.Fatalf("subnet not found in zoneToSubnetMap")
}
g.Spec.Subnets = []string{subnet.Name}
if opt.IPv6 && opt.Topology == api.TopologyPrivate {
g.Spec.Subnets = []string{"dualstack-" + subnet.Name}
}
if cloudProvider == api.CloudProviderGCE || cloudProvider == api.CloudProviderAzure {
g.Spec.Zones = []string{zone}
}
if cluster.IsKubernetesGTE("1.22") {
if cloudProvider == api.CloudProviderAWS {
g.Spec.InstanceMetadata = &api.InstanceMetadataOptions{
HTTPPutResponseHopLimit: fi.PtrTo(int64(3)),
HTTPTokens: fi.PtrTo("required"),
}
}
if cluster.IsKubernetesGTE("1.26") && fi.ValueOf(cluster.Spec.IAM.UseServiceAccountExternalPermissions) {
g.Spec.InstanceMetadata.HTTPPutResponseHopLimit = fi.PtrTo(int64(1))
}
}
g.Spec.MachineType = opt.ControlPlaneSize
g.Spec.Image = opt.ControlPlaneImage
controlPlanes = append(controlPlanes, g)
}
}
// Build the Etcd clusters
{
controlPlaneAZs := sets.NewString()
duplicateAZs := false
for _, ig := range controlPlanes {
zones, err := model.FindZonesForInstanceGroup(cluster, ig)
if err != nil {
return nil, err
}
for _, zone := range zones {
if controlPlaneAZs.Has(zone) {
duplicateAZs = true
}
controlPlaneAZs.Insert(zone)
}
}
if duplicateAZs {
klog.Warningf("Running with control-plane nodes in the same AZs; redundancy will be reduced")
}
clusters := EtcdClusters
if opt.Networking == "cilium-etcd" {
clusters = append(clusters, "cilium")
}
encryptEtcdStorage := false
if opt.EncryptEtcdStorage != nil {
encryptEtcdStorage = fi.ValueOf(opt.EncryptEtcdStorage)
} else if cloudProvider == api.CloudProviderAWS {
encryptEtcdStorage = true
}
for _, etcdCluster := range clusters {
etcd := createEtcdCluster(etcdCluster, controlPlanes, encryptEtcdStorage, opt.EtcdStorageType)
cluster.Spec.EtcdClusters = append(cluster.Spec.EtcdClusters, etcd)
}
}
return controlPlanes, nil
}
func trimCommonPrefix(names []string) []string {
// Trim shared prefix to keep the lengths sane
// (this only applies to new clusters...)
for len(names) != 0 && len(names[0]) > 1 {
prefix := names[0][:1]
allMatch := true
for _, name := range names {
if !strings.HasPrefix(name, prefix) {
allMatch = false
}
}
if !allMatch {
break
}
for i := range names {
names[i] = strings.TrimPrefix(names[i], prefix)
}
}
for i, name := range names {
if len(name) > 0 && name[0] >= '0' && name[0] <= '9' {
names[i] = "etcd-" + name
}
}
return names
}
func setupNodes(opt *NewClusterOptions, cluster *api.Cluster, zoneToSubnetMap map[string]*api.ClusterSubnetSpec) ([]*api.InstanceGroup, error) {
cloudProvider := cluster.Spec.GetCloudProvider()
var nodes []*api.InstanceGroup
// The node count is the number of zones unless explicitly set
// We then divvy up amongst the zones
numZones := len(opt.Zones)
nodeCount := opt.NodeCount
if nodeCount == 0 {
// If node count is not specified, default to the number of zones
nodeCount = int32(numZones)
}
countPerIG := nodeCount / int32(numZones)
remainder := int(nodeCount) % numZones
for i, zone := range opt.Zones {
count := countPerIG
if i < remainder {
count++
}