mirror of https://github.com/kubernetes/kops.git
95 lines
2.6 KiB
Go
95 lines
2.6 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 azure
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import (
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"context"
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"fmt"
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"github.com/Azure/azure-sdk-for-go/services/compute/mgmt/2022-08-01/compute"
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"github.com/Azure/azure-sdk-for-go/services/network/mgmt/2022-05-01/network"
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"k8s.io/klog/v2"
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"k8s.io/kops/protokube/pkg/gossip"
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)
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type client interface {
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ListVMScaleSets(ctx context.Context) ([]compute.VirtualMachineScaleSet, error)
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ListVMSSNetworkInterfaces(ctx context.Context, vmScaleSetName string) ([]network.Interface, error)
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}
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var _ client = &Client{}
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// SeedProvider is an Azure implementation of gossip.SeedProvider.
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type SeedProvider struct {
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client client
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tags map[string]string
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}
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var _ gossip.SeedProvider = &SeedProvider{}
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// NewSeedProvider returns a new SeedProvider.
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func NewSeedProvider(client client, tags map[string]string) (*SeedProvider, error) {
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return &SeedProvider{
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client: client,
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tags: tags,
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}, nil
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}
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// GetSeeds returns a slice of strings used as seeds of Gossip.
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// This follows the implementation of AWS and creates seeds from
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// private IPs of VMs in the cluster.
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func (p *SeedProvider) GetSeeds() ([]string, error) {
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ctx := context.TODO()
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vmsses, err := p.client.ListVMScaleSets(ctx)
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if err != nil {
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return nil, fmt.Errorf("error listing VM Scale Sets: %s", err)
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}
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var vmssNames []string
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for _, vmss := range vmsses {
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if p.isVMSSForCluster(&vmss) {
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vmssNames = append(vmssNames, *vmss.Name)
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}
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}
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klog.V(2).Infof("Found %d VM Scale Sets for the cluster (out of %d)", len(vmssNames), len(vmsses))
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var seeds []string
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for _, vmssName := range vmssNames {
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ifaces, err := p.client.ListVMSSNetworkInterfaces(ctx, vmssName)
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if err != nil {
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return nil, fmt.Errorf("error listing VMSS network interfaces: %s", err)
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}
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for _, iface := range ifaces {
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for _, i := range *iface.IPConfigurations {
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seeds = append(seeds, *i.PrivateIPAddress)
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}
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}
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}
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return seeds, nil
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}
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func (p *SeedProvider) isVMSSForCluster(vmss *compute.VirtualMachineScaleSet) bool {
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found := 0
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for k, v := range vmss.Tags {
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if p.tags[k] == *v {
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found++
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}
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}
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// TODO(kenji): Filter by ProvisioningState if necessary.
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return found == len(p.tags)
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}
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