mirror of https://github.com/kubernetes/kops.git
111 lines
3.2 KiB
Go
111 lines
3.2 KiB
Go
/*
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Copyright 2020 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package azuremodel
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import (
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"fmt"
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"github.com/Azure/azure-sdk-for-go/sdk/azcore/to"
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"k8s.io/kops/pkg/apis/kops"
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"k8s.io/kops/pkg/wellknownservices"
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"k8s.io/kops/upup/pkg/fi"
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"k8s.io/kops/upup/pkg/fi/cloudup/azuretasks"
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)
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// APILoadBalancerModelBuilder builds a LoadBalancer for accessing the API
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type APILoadBalancerModelBuilder struct {
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*AzureModelContext
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Lifecycle fi.Lifecycle
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SecurityLifecycle fi.Lifecycle
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}
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var _ fi.CloudupModelBuilder = &APILoadBalancerModelBuilder{}
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// Build builds tasks for creating a K8s API server for Azure.
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func (b *APILoadBalancerModelBuilder) Build(c *fi.CloudupModelBuilderContext) error {
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if !b.UseLoadBalancerForAPI() {
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return nil
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}
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lbSpec := b.Cluster.Spec.API.LoadBalancer
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if lbSpec == nil {
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// Skipping API LB creation; not requested in Spec
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return nil
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}
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// Create LoadBalancer for API ELB
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lb := &azuretasks.LoadBalancer{
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Name: fi.PtrTo(b.NameForLoadBalancer()),
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Lifecycle: b.Lifecycle,
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ResourceGroup: b.LinkToResourceGroup(),
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Tags: map[string]*string{},
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WellKnownServices: []wellknownservices.WellKnownService{wellknownservices.KubeAPIServer},
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}
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switch lbSpec.Type {
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case kops.LoadBalancerTypeInternal:
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lb.External = to.Ptr(false)
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subnet, err := b.subnetForLoadBalancer()
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if err != nil {
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return err
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}
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lb.Subnet = b.LinkToAzureSubnet(subnet)
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case kops.LoadBalancerTypePublic:
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lb.External = to.Ptr(true)
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// Create Public IP Address for Public Loadbalacer
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p := &azuretasks.PublicIPAddress{
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Name: fi.PtrTo(b.NameForLoadBalancer()),
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Lifecycle: b.Lifecycle,
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ResourceGroup: b.LinkToResourceGroup(),
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Tags: map[string]*string{},
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}
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c.AddTask(p)
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default:
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return fmt.Errorf("unknown load balancer Type: %q", lbSpec.Type)
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}
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c.AddTask(lb)
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if b.Cluster.UsesLegacyGossip() || b.Cluster.UsesPrivateDNS() || b.Cluster.UsesNoneDNS() {
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lb.WellKnownServices = append(lb.WellKnownServices, wellknownservices.KopsController)
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}
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return nil
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}
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// subnetForLoadBalancer returns the subnet the loadbalancer will use.
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func (c *AzureModelContext) subnetForLoadBalancer() (*kops.ClusterSubnetSpec, error) {
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// Get all master instance group subnets
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for _, ig := range c.MasterInstanceGroups() {
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subnets, err := c.GatherSubnets(ig)
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if err != nil {
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return nil, err
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}
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if len(subnets) != 1 {
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return nil, fmt.Errorf("expected exactly one subnet for InstanceGroup %q; subnets was %s", ig.Name, ig.Spec.Subnets)
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}
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if subnets[0].Type != kops.SubnetTypeDualStack && subnets[0].Type != kops.SubnetTypePrivate {
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continue
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}
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return subnets[0], nil
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}
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return nil, fmt.Errorf("no suitable subnets found")
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}
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