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seeds.go
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seeds.go
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/*
Copyright 2017 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 gce
import (
"fmt"
"github.com/gophercloud/gophercloud"
"github.com/gophercloud/gophercloud/openstack/compute/v2/servers"
"github.com/gophercloud/gophercloud/pagination"
"k8s.io/klog/v2"
"k8s.io/kops/protokube/pkg/gossip"
"k8s.io/kops/upup/pkg/fi/cloudup/openstack"
)
type SeedProvider struct {
computeClient *gophercloud.ServiceClient
projectID string
clusterName string
}
var _ gossip.SeedProvider = &SeedProvider{}
func (p *SeedProvider) GetSeeds() ([]string, error) {
var seeds []string
err := servers.List(p.computeClient, servers.ListOpts{
TenantID: p.projectID,
}).EachPage(func(page pagination.Page) (bool, error) {
var s []servers.Server
err := servers.ExtractServersInto(page, &s)
if err != nil {
return false, err
}
for _, server := range s {
if clusterName, ok := server.Metadata[openstack.TagClusterName]; ok {
// verify that the instance is from the same cluster
if clusterName != p.clusterName {
continue
}
var err error
// find kopsNetwork from metadata, fallback to clustername
ifName := clusterName
if val, ok := server.Metadata[openstack.TagKopsNetwork]; ok {
ifName = val
}
addr, err := openstack.GetServerFixedIP(&server, ifName)
if err != nil {
klog.Warningf("Failed to list seeds: %v", err)
continue
}
seeds = append(seeds, addr)
}
}
return true, nil
})
if err != nil {
return seeds, fmt.Errorf("Failed to list servers while retrieving seeds: %v", err)
}
return seeds, nil
}
func NewSeedProvider(computeClient *gophercloud.ServiceClient, clusterName string, projectID string) (*SeedProvider, error) {
return &SeedProvider{
computeClient: computeClient,
clusterName: clusterName,
projectID: projectID,
}, nil
}