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cloud.go
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cloud.go
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/*
Copyright 2022 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 scaleway
import (
"fmt"
"os"
"strings"
domain "github.com/scaleway/scaleway-sdk-go/api/domain/v2beta1"
iam "github.com/scaleway/scaleway-sdk-go/api/iam/v1alpha1"
"github.com/scaleway/scaleway-sdk-go/api/instance/v1"
"github.com/scaleway/scaleway-sdk-go/api/lb/v1"
"github.com/scaleway/scaleway-sdk-go/api/marketplace/v2"
"github.com/scaleway/scaleway-sdk-go/scw"
v1 "k8s.io/api/core/v1"
"k8s.io/klog/v2"
kopsv "k8s.io/kops"
"k8s.io/kops/dnsprovider/pkg/dnsprovider"
dns "k8s.io/kops/dnsprovider/pkg/dnsprovider/providers/scaleway"
"k8s.io/kops/pkg/apis/kops"
"k8s.io/kops/pkg/cloudinstances"
"k8s.io/kops/upup/pkg/fi"
)
const (
TagClusterName = "noprefix=kops.k8s.io/cluster"
TagInstanceGroup = "noprefix=kops.k8s.io/instance-group"
TagNameEtcdClusterPrefix = "noprefix=kops.k8s.io/etcd"
TagNeedsUpdate = "noprefix=kops.k8s.io/needs-update"
TagNameRolePrefix = "noprefix=kops.k8s.io/role"
TagRoleControlPlane = "ControlPlane"
TagRoleWorker = "Node"
KopsUserAgentPrefix = "kubernetes-kops/"
)
// ScwCloud exposes all the interfaces required to operate on Scaleway resources
type ScwCloud interface {
fi.Cloud
ClusterName(tags []string) string
DNS() (dnsprovider.Interface, error)
ProviderID() kops.CloudProviderID
Region() string
Zone() string
DomainService() *domain.API
IamService() *iam.API
InstanceService() *instance.API
LBService() *lb.ZonedAPI
MarketplaceService() *marketplace.API
DeleteGroup(group *cloudinstances.CloudInstanceGroup) error
DeleteInstance(i *cloudinstances.CloudInstance) error
DeregisterInstance(instance *cloudinstances.CloudInstance) error
DetachInstance(instance *cloudinstances.CloudInstance) error
FindClusterStatus(cluster *kops.Cluster) (*kops.ClusterStatus, error)
FindVPCInfo(id string) (*fi.VPCInfo, error)
GetApiIngressStatus(cluster *kops.Cluster) ([]fi.ApiIngressStatus, error)
GetCloudGroups(cluster *kops.Cluster, instancegroups []*kops.InstanceGroup, warnUnmatched bool, nodes []v1.Node) (map[string]*cloudinstances.CloudInstanceGroup, error)
GetClusterDNSRecords(clusterName string) ([]*domain.Record, error)
GetClusterLoadBalancers(clusterName string) ([]*lb.LB, error)
GetClusterServers(clusterName string, instanceGroupName *string) ([]*instance.Server, error)
GetClusterSSHKeys(clusterName string) ([]*iam.SSHKey, error)
GetClusterVolumes(clusterName string) ([]*instance.Volume, error)
DeleteDNSRecord(record *domain.Record, clusterName string) error
DeleteLoadBalancer(loadBalancer *lb.LB) error
DeleteServer(server *instance.Server) error
DeleteSSHKey(sshkey *iam.SSHKey) error
DeleteVolume(volume *instance.Volume) error
}
// static compile time check to validate ScwCloud's fi.Cloud Interface.
var _ fi.Cloud = &scwCloudImplementation{}
// scwCloudImplementation holds the scw.Client object to interact with Scaleway resources.
type scwCloudImplementation struct {
client *scw.Client
region scw.Region
zone scw.Zone
dns dnsprovider.Interface
tags map[string]string
domainAPI *domain.API
iamAPI *iam.API
instanceAPI *instance.API
lbAPI *lb.ZonedAPI
marketplaceAPI *marketplace.API
}
// NewScwCloud returns a Cloud with a Scaleway Client using the env vars SCW_PROFILE or
// SCW_ACCESS_KEY, SCW_SECRET_KEY and SCW_DEFAULT_PROJECT_ID
func NewScwCloud(tags map[string]string) (ScwCloud, error) {
region, err := scw.ParseRegion(tags["region"])
if err != nil {
return nil, err
}
zone, err := scw.ParseZone(tags["zone"])
if err != nil {
return nil, err
}
var scwClient *scw.Client
if profileName := os.Getenv("SCW_PROFILE"); profileName == "REDACTED" {
// If the profile is REDACTED, we're running integration tests so no need for authentication
scwClient, err = scw.NewClient(scw.WithoutAuth())
if err != nil {
return nil, err
}
} else {
profile, err := CreateValidScalewayProfile()
if err != nil {
return nil, err
}
scwClient, err = scw.NewClient(
scw.WithProfile(profile),
scw.WithUserAgent(KopsUserAgentPrefix+kopsv.Version),
)
if err != nil {
return nil, fmt.Errorf("creating client for Scaleway Cloud: %w", err)
}
}
return &scwCloudImplementation{
client: scwClient,
region: region,
zone: zone,
dns: dns.NewProvider(domain.NewAPI(scwClient)),
tags: tags,
domainAPI: domain.NewAPI(scwClient),
iamAPI: iam.NewAPI(scwClient),
instanceAPI: instance.NewAPI(scwClient),
lbAPI: lb.NewZonedAPI(scwClient),
marketplaceAPI: marketplace.NewAPI(scwClient),
}, nil
}
func (s *scwCloudImplementation) ClusterName(tags []string) string {
return ClusterNameFromTags(tags)
}
func (s *scwCloudImplementation) DNS() (dnsprovider.Interface, error) {
provider, err := dnsprovider.GetDnsProvider(dns.ProviderName, nil)
if err != nil {
return nil, fmt.Errorf("error building DNS provider: %w", err)
}
return provider, nil
}
func (s *scwCloudImplementation) ProviderID() kops.CloudProviderID {
return kops.CloudProviderScaleway
}
func (s *scwCloudImplementation) Region() string {
return string(s.region)
}
func (s *scwCloudImplementation) Zone() string {
return string(s.zone)
}
func (s *scwCloudImplementation) DomainService() *domain.API {
return s.domainAPI
}
func (s *scwCloudImplementation) IamService() *iam.API {
return s.iamAPI
}
func (s *scwCloudImplementation) InstanceService() *instance.API {
return s.instanceAPI
}
func (s *scwCloudImplementation) LBService() *lb.ZonedAPI {
return s.lbAPI
}
func (s *scwCloudImplementation) MarketplaceService() *marketplace.API {
return s.marketplaceAPI
}
func (s *scwCloudImplementation) DeleteGroup(group *cloudinstances.CloudInstanceGroup) error {
toDelete := append(group.NeedUpdate, group.Ready...)
for _, cloudInstance := range toDelete {
err := s.DeleteInstance(cloudInstance)
if err != nil {
return fmt.Errorf("error deleting group %q: %w", group.HumanName, err)
}
}
return nil
}
func (s *scwCloudImplementation) DeleteInstance(i *cloudinstances.CloudInstance) error {
server, err := s.instanceAPI.GetServer(&instance.GetServerRequest{
Zone: s.zone,
ServerID: i.ID,
})
if err != nil {
if is404Error(err) {
klog.V(4).Infof("error deleting cloud instance %s of group %s : instance was already deleted", i.ID, i.CloudInstanceGroup.HumanName)
return nil
}
return fmt.Errorf("deleting cloud instance %s of group %s: %w", i.ID, i.CloudInstanceGroup.HumanName, err)
}
err = s.DeleteServer(server.Server)
if err != nil {
return fmt.Errorf("deleting cloud instance %s of group %s: %w", i.ID, i.CloudInstanceGroup.HumanName, err)
}
return nil
}
func (s *scwCloudImplementation) DeregisterInstance(i *cloudinstances.CloudInstance) error {
server, err := s.instanceAPI.GetServer(&instance.GetServerRequest{
Zone: s.zone,
ServerID: i.ID,
})
if err != nil {
return fmt.Errorf("deregistering cloud instance %s of group %q: %w", i.ID, i.CloudInstanceGroup.HumanName, err)
}
// We remove the instance's IP from load-balancers
lbs, err := s.GetClusterLoadBalancers(s.ClusterName(server.Server.Tags))
if err != nil {
return fmt.Errorf("deregistering cloud instance %s of group %q: %w", i.ID, i.CloudInstanceGroup.HumanName, err)
}
for _, loadBalancer := range lbs {
backEnds, err := s.lbAPI.ListBackends(&lb.ZonedAPIListBackendsRequest{
Zone: s.zone,
LBID: loadBalancer.ID,
}, scw.WithAllPages())
if err != nil {
return fmt.Errorf("deregistering cloud instance %s of group %q: listing load-balancer's back-ends for instance creation: %w", i.ID, i.CloudInstanceGroup.HumanName, err)
}
for _, backEnd := range backEnds.Backends {
for _, serverIP := range backEnd.Pool {
if serverIP == fi.ValueOf(server.Server.PrivateIP) {
_, err := s.lbAPI.RemoveBackendServers(&lb.ZonedAPIRemoveBackendServersRequest{
Zone: s.zone,
BackendID: backEnd.ID,
ServerIP: []string{serverIP},
})
if err != nil {
return fmt.Errorf("deregistering cloud instance %s of group %q: removing IP from lb: %w", i.ID, i.CloudInstanceGroup.HumanName, err)
}
}
}
}
}
return nil
}
func (s *scwCloudImplementation) DetachInstance(i *cloudinstances.CloudInstance) error {
klog.V(8).Infof("Scaleway DetachInstance is not implemented yet")
return fmt.Errorf("DetachInstance is not implemented yet for Scaleway")
}
// FindClusterStatus was used before etcd-manager to check the etcd cluster status and prevent unsupported changes.
func (s *scwCloudImplementation) FindClusterStatus(cluster *kops.Cluster) (*kops.ClusterStatus, error) {
klog.V(8).Info("Scaleway FindClusterStatus is not implemented")
return nil, nil
}
// FindVPCInfo is not implemented yet, it's only here to satisfy the fi.Cloud interface
func (s *scwCloudImplementation) FindVPCInfo(id string) (*fi.VPCInfo, error) {
klog.V(8).Info("Scaleway clusters don't have a VPC yet so FindVPCInfo is not implemented")
return nil, fmt.Errorf("FindVPCInfo is not implemented yet for Scaleway")
}
func (s *scwCloudImplementation) GetApiIngressStatus(cluster *kops.Cluster) ([]fi.ApiIngressStatus, error) {
var ingresses []fi.ApiIngressStatus
name := "api." + cluster.Name
responseLoadBalancers, err := s.lbAPI.ListLBs(&lb.ZonedAPIListLBsRequest{
Zone: s.zone,
Name: &name,
}, scw.WithAllPages())
if err != nil {
return nil, fmt.Errorf("finding load-balancers: %w", err)
}
if len(responseLoadBalancers.LBs) == 0 {
klog.V(8).Infof("Could not find any load-balancers for cluster %s", cluster.Name)
return nil, nil
}
if len(responseLoadBalancers.LBs) > 1 {
klog.V(4).Infof("More than 1 load-balancer with the name %s was found", name)
}
for _, loadBalancer := range responseLoadBalancers.LBs {
for _, lbIP := range loadBalancer.IP {
ingresses = append(ingresses, fi.ApiIngressStatus{IP: lbIP.IPAddress})
}
}
return ingresses, nil
}
func (s *scwCloudImplementation) GetCloudGroups(cluster *kops.Cluster, instancegroups []*kops.InstanceGroup, warnUnmatched bool, nodes []v1.Node) (map[string]*cloudinstances.CloudInstanceGroup, error) {
groups := make(map[string]*cloudinstances.CloudInstanceGroup)
nodeMap := cloudinstances.GetNodeMap(nodes, cluster)
serverGroups, err := findServerGroups(s, cluster.Name)
if err != nil {
return nil, fmt.Errorf("failed to find server groups: %w", err)
}
for _, ig := range instancegroups {
serverGroup, ok := serverGroups[ig.Name]
if !ok {
if warnUnmatched {
klog.Warningf("Server group %q has no corresponding instance group", ig.Name)
}
continue
}
groups[ig.Name], err = buildCloudGroup(ig, serverGroup, nodeMap)
if err != nil {
return nil, fmt.Errorf("failed to build cloud group for instance group %q: %w", ig.Name, err)
}
}
return groups, nil
}
func findServerGroups(s *scwCloudImplementation, clusterName string) (map[string][]*instance.Server, error) {
servers, err := s.GetClusterServers(clusterName, nil)
if err != nil {
return nil, err
}
serverGroups := make(map[string][]*instance.Server)
for _, server := range servers {
igName := InstanceGroupNameFromTags(server.Tags)
serverGroups[igName] = append(serverGroups[igName], server)
}
return serverGroups, nil
}
func buildCloudGroup(ig *kops.InstanceGroup, sg []*instance.Server, nodeMap map[string]*v1.Node) (*cloudinstances.CloudInstanceGroup, error) {
cloudInstanceGroup := &cloudinstances.CloudInstanceGroup{
HumanName: ig.Name,
InstanceGroup: ig,
Raw: sg,
MinSize: int(fi.ValueOf(ig.Spec.MinSize)),
TargetSize: int(fi.ValueOf(ig.Spec.MinSize)),
MaxSize: int(fi.ValueOf(ig.Spec.MaxSize)),
}
for _, server := range sg {
status := cloudinstances.CloudInstanceStatusUpToDate
for _, tag := range server.Tags {
if tag == TagNeedsUpdate {
status = cloudinstances.CloudInstanceStatusNeedsUpdate
}
}
cloudInstance, err := cloudInstanceGroup.NewCloudInstance(server.ID, status, nodeMap[server.ID])
if err != nil {
return nil, fmt.Errorf("failed to create cloud instance for server %s(%s): %w", server.Name, server.ID, err)
}
cloudInstance.State = cloudinstances.State(server.State)
cloudInstance.MachineType = server.CommercialType
cloudInstance.Roles = append(cloudInstance.Roles, InstanceRoleFromTags(server.Tags))
if server.PrivateIP != nil {
cloudInstance.PrivateIP = *server.PrivateIP
}
}
return cloudInstanceGroup, nil
}
func (s *scwCloudImplementation) GetClusterDNSRecords(clusterName string) ([]*domain.Record, error) {
names := strings.SplitN(clusterName, ".", 2)
clusterNameShort := names[0]
domainName := names[1]
records, err := s.domainAPI.ListDNSZoneRecords(&domain.ListDNSZoneRecordsRequest{
DNSZone: domainName,
}, scw.WithAllPages())
if err != nil {
return nil, fmt.Errorf("listing cluster DNS records: %w", err)
}
clusterDNSRecords := []*domain.Record(nil)
for _, record := range records.Records {
if strings.HasSuffix(record.Name, clusterNameShort) {
clusterDNSRecords = append(clusterDNSRecords, record)
}
}
return clusterDNSRecords, nil
}
func (s *scwCloudImplementation) GetClusterLoadBalancers(clusterName string) ([]*lb.LB, error) {
loadBalancerName := "api." + clusterName
lbs, err := s.lbAPI.ListLBs(&lb.ZonedAPIListLBsRequest{
Zone: s.zone,
Name: &loadBalancerName,
}, scw.WithAllPages())
if err != nil {
return nil, fmt.Errorf("listing cluster load-balancers: %w", err)
}
return lbs.LBs, nil
}
func (s *scwCloudImplementation) GetClusterServers(clusterName string, instanceGroupName *string) ([]*instance.Server, error) {
tags := []string{TagClusterName + "=" + clusterName}
if instanceGroupName != nil {
tags = append(tags, fmt.Sprintf("%s=%s", TagInstanceGroup, *instanceGroupName))
}
request := &instance.ListServersRequest{
Zone: s.zone,
Name: instanceGroupName,
Tags: tags,
}
servers, err := s.instanceAPI.ListServers(request, scw.WithAllPages())
if err != nil {
if instanceGroupName != nil {
return nil, fmt.Errorf("failed to list cluster servers named %q: %w", *instanceGroupName, err)
}
return nil, fmt.Errorf("failed to list cluster servers: %w", err)
}
return servers.Servers, nil
}
func (s *scwCloudImplementation) GetClusterSSHKeys(clusterName string) ([]*iam.SSHKey, error) {
clusterSSHKeys := []*iam.SSHKey(nil)
allSSHKeys, err := s.iamAPI.ListSSHKeys(&iam.ListSSHKeysRequest{}, scw.WithAllPages())
for _, sshkey := range allSSHKeys.SSHKeys {
if strings.HasPrefix(sshkey.Name, fmt.Sprintf("kubernetes.%s-", clusterName)) {
clusterSSHKeys = append(clusterSSHKeys, sshkey)
}
}
if err != nil {
return nil, fmt.Errorf("failed to list cluster ssh keys: %w", err)
}
return clusterSSHKeys, nil
}
func (s *scwCloudImplementation) GetClusterVolumes(clusterName string) ([]*instance.Volume, error) {
volumes, err := s.instanceAPI.ListVolumes(&instance.ListVolumesRequest{
Zone: s.zone,
Tags: []string{TagClusterName + "=" + clusterName},
}, scw.WithAllPages())
if err != nil {
return nil, fmt.Errorf("failed to list cluster volumes: %w", err)
}
return volumes.Volumes, nil
}
func (s *scwCloudImplementation) DeleteDNSRecord(record *domain.Record, clusterName string) error {
domainName := strings.SplitN(clusterName, ".", 2)[1]
recordDeleteRequest := &domain.UpdateDNSZoneRecordsRequest{
DNSZone: domainName,
Changes: []*domain.RecordChange{
{
Delete: &domain.RecordChangeDelete{
ID: scw.StringPtr(record.ID),
},
},
},
}
_, err := s.domainAPI.UpdateDNSZoneRecords(recordDeleteRequest)
if err != nil {
if is404Error(err) {
klog.V(8).Infof("DNS record %q (%s) was already deleted", record.Name, record.ID)
return nil
}
return fmt.Errorf("failed to delete record %s: %w", record.Name, err)
}
return nil
}
func (s *scwCloudImplementation) DeleteLoadBalancer(loadBalancer *lb.LB) error {
ipsToRelease := loadBalancer.IP
// We delete the load-balancer once it's in a stable state
_, err := s.lbAPI.WaitForLb(&lb.ZonedAPIWaitForLBRequest{
LBID: loadBalancer.ID,
Zone: s.zone,
})
if err != nil {
if is404Error(err) {
klog.V(8).Infof("Load-balancer %q (%s) was already deleted", loadBalancer.Name, loadBalancer.ID)
return nil
}
return fmt.Errorf("waiting for load-balancer: %w", err)
}
err = s.lbAPI.DeleteLB(&lb.ZonedAPIDeleteLBRequest{
Zone: s.zone,
LBID: loadBalancer.ID,
})
if err != nil {
return fmt.Errorf("deleting load-balancer %s: %w", loadBalancer.ID, err)
}
// We wait for the load-balancer to be deleted, then we detach its IPs
_, err = s.lbAPI.WaitForLb(&lb.ZonedAPIWaitForLBRequest{
LBID: loadBalancer.ID,
Zone: s.zone,
})
if !is404Error(err) {
return fmt.Errorf("waiting for load-balancer %s after deletion: %w", loadBalancer.ID, err)
}
for _, ip := range ipsToRelease {
err := s.lbAPI.ReleaseIP(&lb.ZonedAPIReleaseIPRequest{
Zone: s.zone,
IPID: ip.ID,
})
if err != nil {
return fmt.Errorf("deleting load-balancer IP: %w", err)
}
}
return nil
}
func (s *scwCloudImplementation) DeleteServer(server *instance.Server) error {
srv, err := s.instanceAPI.GetServer(&instance.GetServerRequest{
Zone: s.zone,
ServerID: server.ID,
})
if err != nil {
if is404Error(err) {
klog.V(4).Infof("delete server %s: instance %q was already deleted", server.ID, server.Name)
return nil
}
return err
}
// We detach the etcd volumes
for _, volume := range srv.Server.Volumes {
volumeResponse, err := s.instanceAPI.GetVolume(&instance.GetVolumeRequest{
Zone: s.zone,
VolumeID: volume.ID,
})
if err != nil {
return fmt.Errorf("delete server %s: getting infos for volume %s", server.ID, volume.ID)
}
for _, tag := range volumeResponse.Volume.Tags {
if strings.HasPrefix(tag, TagNameEtcdClusterPrefix) {
_, err = s.instanceAPI.DetachVolume(&instance.DetachVolumeRequest{
Zone: s.zone,
VolumeID: volume.ID,
})
if err != nil {
return fmt.Errorf("delete server %s: detaching volume %s", server.ID, volume.ID)
}
}
}
}
// We terminate the server. This stops and deletes the machine immediately
_, err = s.instanceAPI.ServerAction(&instance.ServerActionRequest{
Zone: s.zone,
ServerID: server.ID,
Action: instance.ServerActionTerminate,
})
if err != nil && !is404Error(err) {
return fmt.Errorf("delete server %s: terminating instance: %w", server.ID, err)
}
_, err = s.instanceAPI.WaitForServer(&instance.WaitForServerRequest{
ServerID: server.ID,
Zone: s.zone,
})
if err != nil && !is404Error(err) {
return fmt.Errorf("delete server %s: waiting for instance after termination: %w", server.ID, err)
}
return nil
}
func (s *scwCloudImplementation) DeleteSSHKey(sshkey *iam.SSHKey) error {
err := s.iamAPI.DeleteSSHKey(&iam.DeleteSSHKeyRequest{
SSHKeyID: sshkey.ID,
})
if err != nil {
if is404Error(err) {
klog.V(8).Infof("SSH key %q (%s) was already deleted", sshkey.Name, sshkey.ID)
return nil
}
return fmt.Errorf("failed to delete ssh key %s: %w", sshkey.ID, err)
}
return nil
}
func (s *scwCloudImplementation) DeleteVolume(volume *instance.Volume) error {
err := s.instanceAPI.DeleteVolume(&instance.DeleteVolumeRequest{
VolumeID: volume.ID,
Zone: s.zone,
})
if err != nil {
if is404Error(err) {
klog.V(8).Infof("Volume %q (%s) was already deleted", volume.Name, volume.ID)
return nil
}
return fmt.Errorf("failed to delete volume %s: %w", volume.ID, err)
}
_, err = s.instanceAPI.WaitForVolume(&instance.WaitForVolumeRequest{
VolumeID: volume.ID,
Zone: s.zone,
})
if !is404Error(err) {
return fmt.Errorf("delete volume %s: error waiting for volume after deletion: %w", volume.ID, err)
}
return nil
}