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| 1 | +/* |
| 2 | +Copyright 2026 The Kubernetes Authors. |
| 3 | +
|
| 4 | +Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | +you may not use this file except in compliance with the License. |
| 6 | +You may obtain a copy of the License at |
| 7 | +
|
| 8 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +
|
| 10 | +Unless required by applicable law or agreed to in writing, software |
| 11 | +distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | +See the License for the specific language governing permissions and |
| 14 | +limitations under the License. |
| 15 | +*/ |
| 16 | + |
| 17 | +package sakuracloud |
| 18 | + |
| 19 | +import ( |
| 20 | + "fmt" |
| 21 | + "strings" |
| 22 | + |
| 23 | + apiv1 "k8s.io/api/core/v1" |
| 24 | + "k8s.io/apimachinery/pkg/api/resource" |
| 25 | + "k8s.io/client-go/informers" |
| 26 | + "k8s.io/klog/v2" |
| 27 | + "sigs.k8s.io/cluster-autoscaler/pkg/cloudprovider" |
| 28 | + "sigs.k8s.io/cluster-autoscaler/pkg/cloudprovider/builder" |
| 29 | + coreoptions "sigs.k8s.io/cluster-autoscaler/pkg/core/options" |
| 30 | + autoscalerErrors "sigs.k8s.io/cluster-autoscaler/pkg/utils/errors" |
| 31 | + "sigs.k8s.io/cluster-autoscaler/pkg/utils/gpu" |
| 32 | +) |
| 33 | + |
| 34 | +// ProviderName is the cloud provider name for SAKURA cloud. |
| 35 | +const ProviderName = "sakuracloud" |
| 36 | + |
| 37 | +var _ cloudprovider.CloudProvider = (*sakuracloudCloudProvider)(nil) |
| 38 | + |
| 39 | +func init() { |
| 40 | + builder.RegisterCloudProvider(ProviderName, func(opts *coreoptions.AutoscalerOptions, do cloudprovider.NodeGroupDiscoveryOptions, rl *cloudprovider.ResourceLimiter, informerFactory informers.SharedInformerFactory) cloudprovider.CloudProvider { |
| 41 | + return BuildSakuraCloud(opts, do, rl) |
| 42 | + }) |
| 43 | + builder.SetDefaultCloudProvider(ProviderName) |
| 44 | +} |
| 45 | + |
| 46 | +const ( |
| 47 | + // GPULabel is the label added to nodes with GPU resource. |
| 48 | + GPULabel = "sakuracloud/gpu-node" |
| 49 | + |
| 50 | + providerIDPrefix = "sakuracloud://" |
| 51 | +) |
| 52 | + |
| 53 | +// providerIDForServer builds "sakuracloud://<zone>/<serverName>". The node's |
| 54 | +// kubelet must be started with the matching --provider-id (the bootstrap |
| 55 | +// startup note derives it from the hostname, which equals the server name). |
| 56 | +func providerIDForServer(zone, serverName string) string { |
| 57 | + return fmt.Sprintf("%s%s/%s", providerIDPrefix, zone, serverName) |
| 58 | +} |
| 59 | + |
| 60 | +// serverNameFromProviderID extracts the server name from a providerID. |
| 61 | +func serverNameFromProviderID(providerID string) (string, error) { |
| 62 | + rest, ok := strings.CutPrefix(providerID, providerIDPrefix) |
| 63 | + if !ok { |
| 64 | + return "", fmt.Errorf("providerID %q does not have prefix %q", providerID, providerIDPrefix) |
| 65 | + } |
| 66 | + parts := strings.SplitN(rest, "/", 2) |
| 67 | + if len(parts) != 2 || parts[1] == "" { |
| 68 | + return "", fmt.Errorf("providerID %q: expected format %szone/serverName", providerID, providerIDPrefix) |
| 69 | + } |
| 70 | + return parts[1], nil |
| 71 | +} |
| 72 | + |
| 73 | +// sakuracloudCloudProvider implements cloudprovider.CloudProvider for |
| 74 | +// SAKURA cloud (sakura.ad.jp). |
| 75 | +type sakuracloudCloudProvider struct { |
| 76 | + manager *sakuracloudManager |
| 77 | + resourceLimiter *cloudprovider.ResourceLimiter |
| 78 | +} |
| 79 | + |
| 80 | +// Name returns the name of the cloud provider. |
| 81 | +func (d *sakuracloudCloudProvider) Name() string { |
| 82 | + return ProviderName |
| 83 | +} |
| 84 | + |
| 85 | +// NodeGroups returns all node groups configured for this cloud provider. |
| 86 | +func (d *sakuracloudCloudProvider) NodeGroups() []cloudprovider.NodeGroup { |
| 87 | + groups := make([]cloudprovider.NodeGroup, 0, len(d.manager.nodeGroups)) |
| 88 | + for _, group := range d.manager.nodeGroups { |
| 89 | + groups = append(groups, group) |
| 90 | + } |
| 91 | + return groups |
| 92 | +} |
| 93 | + |
| 94 | +// NodeGroupForNode returns the node group for the given node. Nodes whose |
| 95 | +// providerID is not sakuracloud:// (a mixed-provider cluster: control plane, |
| 96 | +// other clouds) are not managed by this provider and yield nil, per the |
| 97 | +// CloudProvider contract. |
| 98 | +func (d *sakuracloudCloudProvider) NodeGroupForNode(node *apiv1.Node) (cloudprovider.NodeGroup, error) { |
| 99 | + serverName, err := serverNameFromProviderID(node.Spec.ProviderID) |
| 100 | + if err != nil { |
| 101 | + klog.V(4).Infof("sakuracloud: node %s has foreign providerID %q, treating as unmanaged", node.Name, node.Spec.ProviderID) |
| 102 | + return nil, nil |
| 103 | + } |
| 104 | + server := d.manager.serverByName(serverName) |
| 105 | + if server == nil { |
| 106 | + return nil, nil |
| 107 | + } |
| 108 | + groupName, ok := server.groupName() |
| 109 | + if !ok { |
| 110 | + return nil, nil |
| 111 | + } |
| 112 | + group, exists := d.manager.nodeGroups[groupName] |
| 113 | + if !exists { |
| 114 | + return nil, nil |
| 115 | + } |
| 116 | + return group, nil |
| 117 | +} |
| 118 | + |
| 119 | +// HasInstance returns whether a given node has a corresponding instance. |
| 120 | +func (d *sakuracloudCloudProvider) HasInstance(node *apiv1.Node) (bool, error) { |
| 121 | + return true, cloudprovider.ErrNotImplemented |
| 122 | +} |
| 123 | + |
| 124 | +// Pricing is not implemented. |
| 125 | +func (d *sakuracloudCloudProvider) Pricing() (cloudprovider.PricingModel, autoscalerErrors.AutoscalerError) { |
| 126 | + return nil, cloudprovider.ErrNotImplemented |
| 127 | +} |
| 128 | + |
| 129 | +// GetAvailableMachineTypes is not implemented. |
| 130 | +func (d *sakuracloudCloudProvider) GetAvailableMachineTypes() ([]string, error) { |
| 131 | + return []string{}, nil |
| 132 | +} |
| 133 | + |
| 134 | +// NewNodeGroup is not implemented: node groups are statically configured. |
| 135 | +func (d *sakuracloudCloudProvider) NewNodeGroup( |
| 136 | + machineType string, |
| 137 | + labels map[string]string, |
| 138 | + systemLabels map[string]string, |
| 139 | + taints []apiv1.Taint, |
| 140 | + extraResources map[string]resource.Quantity, |
| 141 | +) (cloudprovider.NodeGroup, error) { |
| 142 | + return nil, cloudprovider.ErrNotImplemented |
| 143 | +} |
| 144 | + |
| 145 | +// GetResourceLimiter returns resource constraints for the cluster. |
| 146 | +func (d *sakuracloudCloudProvider) GetResourceLimiter() (*cloudprovider.ResourceLimiter, error) { |
| 147 | + return d.resourceLimiter, nil |
| 148 | +} |
| 149 | + |
| 150 | +// GPULabel returns the label added to nodes with GPU resource. |
| 151 | +func (d *sakuracloudCloudProvider) GPULabel() string { |
| 152 | + return GPULabel |
| 153 | +} |
| 154 | + |
| 155 | +// GetAvailableGPUTypes returns all available GPU types. |
| 156 | +func (d *sakuracloudCloudProvider) GetAvailableGPUTypes() map[string]struct{} { |
| 157 | + return nil |
| 158 | +} |
| 159 | + |
| 160 | +// GetNodeGpuConfig returns the GPU config of the given node. |
| 161 | +func (d *sakuracloudCloudProvider) GetNodeGpuConfig(node *apiv1.Node) *cloudprovider.GpuConfig { |
| 162 | + return gpu.GetNodeGPUFromCloudProvider(d, node) |
| 163 | +} |
| 164 | + |
| 165 | +// Cleanup closes open resources. |
| 166 | +func (d *sakuracloudCloudProvider) Cleanup() error { |
| 167 | + return nil |
| 168 | +} |
| 169 | + |
| 170 | +// Refresh is called before every main loop iteration. |
| 171 | +func (d *sakuracloudCloudProvider) Refresh() error { |
| 172 | + if err := d.manager.refreshServers(); err != nil { |
| 173 | + return err |
| 174 | + } |
| 175 | + for _, group := range d.manager.nodeGroups { |
| 176 | + group.syncTargetSize() |
| 177 | + } |
| 178 | + return nil |
| 179 | +} |
| 180 | + |
| 181 | +// BuildSakuraCloud builds the SAKURA cloud provider. |
| 182 | +func BuildSakuraCloud(_ *coreoptions.AutoscalerOptions, _ cloudprovider.NodeGroupDiscoveryOptions, rl *cloudprovider.ResourceLimiter) cloudprovider.CloudProvider { |
| 183 | + manager, err := newManager() |
| 184 | + if err != nil { |
| 185 | + klog.Fatalf("Failed to create SAKURA cloud manager: %v", err) |
| 186 | + } |
| 187 | + return &sakuracloudCloudProvider{ |
| 188 | + manager: manager, |
| 189 | + resourceLimiter: rl, |
| 190 | + } |
| 191 | +} |
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