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| 1 | +/* |
| 2 | +Copyright 2025 The llm-d 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 main |
| 18 | + |
| 19 | +import ( |
| 20 | + "context" |
| 21 | + "os" |
| 22 | + "os/signal" |
| 23 | + "syscall" |
| 24 | + |
| 25 | + "k8s.io/apimachinery/pkg/runtime" |
| 26 | + clientgoscheme "k8s.io/client-go/kubernetes/scheme" |
| 27 | + ctrl "sigs.k8s.io/controller-runtime" |
| 28 | + "sigs.k8s.io/controller-runtime/pkg/log" |
| 29 | + "sigs.k8s.io/controller-runtime/pkg/log/zap" |
| 30 | + |
| 31 | + "github.com/llm-d/llm-d-kv-cache/pkg/kvcache/kvblock" |
| 32 | + "github.com/llm-d/llm-d-kv-cache/pkg/kvevents" |
| 33 | + "github.com/llm-d/llm-d-kv-cache/pkg/kvevents/controller" |
| 34 | +) |
| 35 | + |
| 36 | +func main() { |
| 37 | + ctx, cancel := context.WithCancel(context.Background()) |
| 38 | + defer cancel() |
| 39 | + |
| 40 | + // Setup graceful shutdown |
| 41 | + sigChan := make(chan os.Signal, 1) |
| 42 | + signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM) |
| 43 | + go func() { |
| 44 | + <-sigChan |
| 45 | + cancel() |
| 46 | + }() |
| 47 | + |
| 48 | + // Setup logger |
| 49 | + ctrl.SetLogger(zap.New(zap.UseDevMode(true))) |
| 50 | + logger := log.FromContext(ctx) |
| 51 | + |
| 52 | + if err := run(ctx); err != nil { |
| 53 | + logger.Error(err, "Failed to run pod reconciler example") |
| 54 | + os.Exit(1) //nolint:gocritic |
| 55 | + } |
| 56 | +} |
| 57 | + |
| 58 | +func run(ctx context.Context) error { |
| 59 | + logger := log.FromContext(ctx) |
| 60 | + |
| 61 | + // Create a scheme for controller-runtime |
| 62 | + scheme := runtime.NewScheme() |
| 63 | + if err := clientgoscheme.AddToScheme(scheme); err != nil { |
| 64 | + return err |
| 65 | + } |
| 66 | + |
| 67 | + // Create a controller-runtime manager |
| 68 | + mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{ |
| 69 | + Scheme: scheme, |
| 70 | + }) |
| 71 | + if err != nil { |
| 72 | + return err |
| 73 | + } |
| 74 | + |
| 75 | + // Setup KV Cache Index |
| 76 | + indexConfig := kvblock.DefaultIndexConfig() |
| 77 | + index, err := kvblock.NewIndex(ctx, indexConfig) |
| 78 | + if err != nil { |
| 79 | + logger.Error(err, "failed to create index") |
| 80 | + return err |
| 81 | + } |
| 82 | + |
| 83 | + // Setup event pool |
| 84 | + poolConfig := kvevents.DefaultConfig() |
| 85 | + tokenProcessor := kvblock.NewChunkedTokenDatabase(kvblock.DefaultTokenProcessorConfig()) |
| 86 | + pool := kvevents.NewPool(poolConfig, index, tokenProcessor) |
| 87 | + pool.Start(ctx) |
| 88 | + |
| 89 | + // Create subscriber manager |
| 90 | + subscriberManager := kvevents.NewSubscriberManager(pool) |
| 91 | + |
| 92 | + // Convert to internal reconciler config |
| 93 | + reconcilerConfig, err := controller.NewPodReconcilerConfig( |
| 94 | + poolConfig.PodDiscoveryConfig, |
| 95 | + poolConfig.TopicFilter, |
| 96 | + ) |
| 97 | + if err != nil { |
| 98 | + logger.Error(err, "failed to create reconciler config") |
| 99 | + return err |
| 100 | + } |
| 101 | + |
| 102 | + // Create and register the pod reconciler |
| 103 | + podReconciler := &controller.PodReconciler{ |
| 104 | + Client: mgr.GetClient(), |
| 105 | + Scheme: mgr.GetScheme(), |
| 106 | + Config: reconcilerConfig, |
| 107 | + SubscriberManager: subscriberManager, |
| 108 | + } |
| 109 | + |
| 110 | + if err := podReconciler.SetupWithManager(mgr); err != nil { |
| 111 | + logger.Error(err, "failed to setup pod reconciler") |
| 112 | + return err |
| 113 | + } |
| 114 | + |
| 115 | + logger.Info("=== Pod Reconciler Example Started ===") |
| 116 | + logger.Info("Watching pods with label selector", "selector", poolConfig.PodDiscoveryConfig.PodLabelSelector) |
| 117 | + logger.Info("Topic filter", "filter", poolConfig.TopicFilter) |
| 118 | + |
| 119 | + // Start the manager (this will start the reconciler) |
| 120 | + mgrCtx, mgrCancel := context.WithCancel(ctx) |
| 121 | + defer mgrCancel() |
| 122 | + |
| 123 | + go func() { |
| 124 | + if err := mgr.Start(mgrCtx); err != nil { |
| 125 | + logger.Error(err, "failed to start manager") |
| 126 | + } |
| 127 | + }() |
| 128 | + |
| 129 | + // Wait for shutdown |
| 130 | + <-ctx.Done() |
| 131 | + logger.Info("Shutting down pod reconciler example...") |
| 132 | + |
| 133 | + // Shutdown subscriber manager |
| 134 | + subscriberManager.Shutdown(ctx) |
| 135 | + |
| 136 | + // Shutdown pool |
| 137 | + pool.Shutdown(ctx) |
| 138 | + |
| 139 | + logger.Info("Pod reconciler example shut down successfully") |
| 140 | + return nil |
| 141 | +} |
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