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| 1 | +/* Copyright © 2026 VMware, Inc. All Rights Reserved. |
| 2 | + SPDX-License-Identifier: Apache-2.0 */ |
| 3 | + |
| 4 | +package config |
| 5 | + |
| 6 | +import ( |
| 7 | + "context" |
| 8 | + "sync" |
| 9 | + |
| 10 | + "go.uber.org/zap" |
| 11 | + v1 "k8s.io/api/core/v1" |
| 12 | + "k8s.io/apimachinery/pkg/api/errors" |
| 13 | + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| 14 | + "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" |
| 15 | + "k8s.io/apimachinery/pkg/runtime/schema" |
| 16 | + "k8s.io/client-go/dynamic" |
| 17 | + "k8s.io/client-go/kubernetes" |
| 18 | +) |
| 19 | + |
| 20 | +const ( |
| 21 | + NetworkProviderLabel = "iaas.vmware.com/network-provider" |
| 22 | + ProviderNSXT1 = "nsx-t1" |
| 23 | + ProviderNSXVPC = "nsx-vpc" |
| 24 | + ProviderVSphereNetwork = "vsphere-network" |
| 25 | + |
| 26 | + supervisorCapabilitiesName = "supervisor-capabilities" |
| 27 | +) |
| 28 | + |
| 29 | +var ( |
| 30 | + supervisorCapabilitiesGVR = schema.GroupVersionResource{ |
| 31 | + Group: "iaas.vmware.com", |
| 32 | + Version: "v1alpha1", |
| 33 | + Resource: "supervisorcapabilities", |
| 34 | + } |
| 35 | + |
| 36 | + stateMu sync.RWMutex |
| 37 | + hasT1Namespaces bool |
| 38 | + hasVPCNamespaces bool |
| 39 | + perNamespaceProvidersSupported *bool |
| 40 | + stateInitialized bool |
| 41 | + stateLog *zap.SugaredLogger |
| 42 | +) |
| 43 | + |
| 44 | +func init() { |
| 45 | + zapLogger, _ := zap.NewProduction() |
| 46 | + stateLog = zapLogger.Sugar() |
| 47 | +} |
| 48 | + |
| 49 | +func checkPerNamespaceProvidersSupported(ctx context.Context, dynClient dynamic.Interface) bool { |
| 50 | + obj, err := dynClient.Resource(supervisorCapabilitiesGVR).Get( |
| 51 | + ctx, supervisorCapabilitiesName, metav1.GetOptions{}) |
| 52 | + if err != nil { |
| 53 | + if errors.IsNotFound(err) { |
| 54 | + stateLog.Info("SupervisorCapabilities CRD not found; " + |
| 55 | + "falling back to legacy config") |
| 56 | + } else { |
| 57 | + stateLog.Infof("Failed to get SupervisorCapabilities: %v; "+ |
| 58 | + "falling back to legacy config", err) |
| 59 | + } |
| 60 | + return false |
| 61 | + } |
| 62 | + return extractCapability(obj) |
| 63 | +} |
| 64 | + |
| 65 | +func extractCapability(obj *unstructured.Unstructured) bool { |
| 66 | + status, found, err := unstructured.NestedMap(obj.Object, "status") |
| 67 | + if err != nil || !found { |
| 68 | + return false |
| 69 | + } |
| 70 | + services, found, err := unstructured.NestedMap(status, "services") |
| 71 | + if err != nil || !found { |
| 72 | + return false |
| 73 | + } |
| 74 | + for _, svcCaps := range services { |
| 75 | + capsMap, ok := svcCaps.(map[string]interface{}) |
| 76 | + if !ok { |
| 77 | + continue |
| 78 | + } |
| 79 | + cap, ok := capsMap["supports_per_namespace_network_providers"] |
| 80 | + if !ok { |
| 81 | + continue |
| 82 | + } |
| 83 | + capMap, ok := cap.(map[string]interface{}) |
| 84 | + if !ok { |
| 85 | + continue |
| 86 | + } |
| 87 | + activated, ok := capMap["activated"] |
| 88 | + if ok { |
| 89 | + if b, ok := activated.(bool); ok && b { |
| 90 | + return true |
| 91 | + } |
| 92 | + } |
| 93 | + } |
| 94 | + return false |
| 95 | +} |
| 96 | + |
| 97 | +func scanNamespaceLabels(ctx context.Context, clientset kubernetes.Interface) (hasT1 bool, hasVPC bool) { |
| 98 | + nsList, err := clientset.CoreV1().Namespaces().List(ctx, metav1.ListOptions{}) |
| 99 | + if err != nil { |
| 100 | + stateLog.Errorf("Failed to list namespaces for mixed-mode state detection: %v", err) |
| 101 | + return false, false |
| 102 | + } |
| 103 | + for _, ns := range nsList.Items { |
| 104 | + provider := ns.Labels[NetworkProviderLabel] |
| 105 | + switch provider { |
| 106 | + case ProviderNSXT1: |
| 107 | + hasT1 = true |
| 108 | + case ProviderNSXVPC: |
| 109 | + hasVPC = true |
| 110 | + case ProviderVSphereNetwork: |
| 111 | + hasVPC = true |
| 112 | + } |
| 113 | + } |
| 114 | + return hasT1, hasVPC |
| 115 | +} |
| 116 | + |
| 117 | +// InitMixedMode initializes mixed-mode state by checking SupervisorCapabilities |
| 118 | +// and scanning namespace labels. If per-namespace providers are not supported, |
| 119 | +// falls back to the legacy EnableVPCNetwork flag. |
| 120 | +func InitMixedMode(ctx context.Context, clientset kubernetes.Interface, dynClient dynamic.Interface, enableVPCNetwork bool) { |
| 121 | + stateMu.Lock() |
| 122 | + defer stateMu.Unlock() |
| 123 | + |
| 124 | + supported := checkPerNamespaceProvidersSupported(ctx, dynClient) |
| 125 | + perNamespaceProvidersSupported = &supported |
| 126 | + |
| 127 | + if supported { |
| 128 | + stateLog.Info("Per-namespace network providers are supported " + |
| 129 | + "(SupervisorCapabilities); scanning namespace labels") |
| 130 | + hasT1Namespaces, hasVPCNamespaces = scanNamespaceLabels(ctx, clientset) |
| 131 | + } else { |
| 132 | + stateLog.Infof("Per-namespace network providers not supported; "+ |
| 133 | + "using legacy EnableVPCNetwork=%v", enableVPCNetwork) |
| 134 | + if enableVPCNetwork { |
| 135 | + hasT1Namespaces = false |
| 136 | + hasVPCNamespaces = true |
| 137 | + } else { |
| 138 | + hasT1Namespaces = true |
| 139 | + hasVPCNamespaces = false |
| 140 | + } |
| 141 | + } |
| 142 | + |
| 143 | + stateInitialized = true |
| 144 | + stateLog.Infof("Mixed-mode state initialized: HasT1Namespaces=%v, "+ |
| 145 | + "HasVPCNamespaces=%v", hasT1Namespaces, hasVPCNamespaces) |
| 146 | +} |
| 147 | + |
| 148 | +// RefreshMixedMode re-scans namespace labels and updates state. |
| 149 | +// Returns true if the state changed (caller should consider restarting). |
| 150 | +func RefreshMixedMode(ctx context.Context, clientset kubernetes.Interface) bool { |
| 151 | + stateMu.Lock() |
| 152 | + defer stateMu.Unlock() |
| 153 | + |
| 154 | + if perNamespaceProvidersSupported == nil || !*perNamespaceProvidersSupported { |
| 155 | + return false |
| 156 | + } |
| 157 | + |
| 158 | + oldT1, oldVPC := hasT1Namespaces, hasVPCNamespaces |
| 159 | + hasT1Namespaces, hasVPCNamespaces = scanNamespaceLabels(ctx, clientset) |
| 160 | + |
| 161 | + changed := oldT1 != hasT1Namespaces || oldVPC != hasVPCNamespaces |
| 162 | + if changed { |
| 163 | + stateLog.Infof("Mixed-mode state changed: HasT1Namespaces=%v->%v, "+ |
| 164 | + "HasVPCNamespaces=%v->%v", oldT1, hasT1Namespaces, oldVPC, hasVPCNamespaces) |
| 165 | + } |
| 166 | + return changed |
| 167 | +} |
| 168 | + |
| 169 | +// HasT1Namespaces returns true when at least one namespace uses T1 networking. |
| 170 | +func HasT1Namespaces() bool { |
| 171 | + stateMu.RLock() |
| 172 | + defer stateMu.RUnlock() |
| 173 | + return hasT1Namespaces |
| 174 | +} |
| 175 | + |
| 176 | +// HasVPCNamespaces returns true when at least one namespace uses VPC (or VDS in migration). |
| 177 | +func HasVPCNamespaces() bool { |
| 178 | + stateMu.RLock() |
| 179 | + defer stateMu.RUnlock() |
| 180 | + return hasVPCNamespaces |
| 181 | +} |
| 182 | + |
| 183 | +// IsMixedModeStateInitialized returns true after InitMixedMode has been called. |
| 184 | +func IsMixedModeStateInitialized() bool { |
| 185 | + stateMu.RLock() |
| 186 | + defer stateMu.RUnlock() |
| 187 | + return stateInitialized |
| 188 | +} |
| 189 | + |
| 190 | +// SetMixedModeStateForTest sets hasT1Namespaces and hasVPCNamespaces for unit tests. |
| 191 | +// Must only be used from test code so production always goes through InitMixedMode. |
| 192 | +func SetMixedModeStateForTest(hasT1, hasVPC bool) { |
| 193 | + stateMu.Lock() |
| 194 | + defer stateMu.Unlock() |
| 195 | + hasT1Namespaces = hasT1 |
| 196 | + hasVPCNamespaces = hasVPC |
| 197 | + stateInitialized = true |
| 198 | +} |
| 199 | + |
| 200 | +// IsPerNamespaceProvidersSupported returns true when SupervisorCapabilities |
| 201 | +// advertises per-namespace network providers. |
| 202 | +func IsPerNamespaceProvidersSupported() bool { |
| 203 | + stateMu.RLock() |
| 204 | + defer stateMu.RUnlock() |
| 205 | + return perNamespaceProvidersSupported != nil && *perNamespaceProvidersSupported |
| 206 | +} |
| 207 | + |
| 208 | +// GetNamespaceNetworkProvider returns the network provider string from a |
| 209 | +// namespace's labels. |
| 210 | +func GetNamespaceNetworkProvider(ns *v1.Namespace) string { |
| 211 | + if ns == nil || ns.Labels == nil { |
| 212 | + return "" |
| 213 | + } |
| 214 | + return ns.Labels[NetworkProviderLabel] |
| 215 | +} |
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