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| 1 | +// Copyright 2025 MongoDB Inc |
| 2 | +// |
| 3 | +// Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | +// you may not use this file except in compliance with the License. |
| 5 | +// You may obtain a copy of the License at |
| 6 | +// |
| 7 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +// |
| 9 | +// Unless required by applicable law or agreed to in writing, software |
| 10 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | +// See the License for the specific language governing permissions and |
| 13 | +// limitations under the License. |
| 14 | + |
| 15 | +package main |
| 16 | + |
| 17 | +import ( |
| 18 | + "context" |
| 19 | + "fmt" |
| 20 | + "log" |
| 21 | + "os" |
| 22 | + "os/exec" |
| 23 | + "os/signal" |
| 24 | + "syscall" |
| 25 | + |
| 26 | + "github.com/go-logr/zapr" |
| 27 | + "go.uber.org/zap" |
| 28 | + corev1 "k8s.io/api/core/v1" |
| 29 | + "k8s.io/apimachinery/pkg/runtime" |
| 30 | + utilruntime "k8s.io/apimachinery/pkg/util/runtime" |
| 31 | + ctrl "sigs.k8s.io/controller-runtime" |
| 32 | + ctrlog "sigs.k8s.io/controller-runtime/pkg/log" |
| 33 | + metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server" |
| 34 | + |
| 35 | + akov2next "github.com/mongodb/mongodb-atlas-kubernetes/v2/internal/nextapi/v1" |
| 36 | +) |
| 37 | + |
| 38 | +func main() { |
| 39 | + akoPath, ok := os.LookupEnv("AKO_BINARY_PATH") |
| 40 | + if !ok { |
| 41 | + log.Fatalf("AKO_BINARY_PATH must be set and point to the AKO binary path") |
| 42 | + } |
| 43 | + |
| 44 | + ctx, cancel := context.WithCancel(context.Background()) |
| 45 | + defer cancel() |
| 46 | + if err := startExperimentalControllers(cancel); err != nil { |
| 47 | + log.Fatalf("Failed to launch experimental controllers: %v", err) |
| 48 | + } |
| 49 | + |
| 50 | + akoCmd, err := startAKO(akoPath) |
| 51 | + if err != nil { |
| 52 | + log.Fatalf("Failed to launch AKO binary %q: %v", akoPath, err) |
| 53 | + } |
| 54 | + |
| 55 | + log.Println("Experimental launcher is running. AKO binary started.") |
| 56 | + |
| 57 | + handleShutdown(ctx, cancel, akoCmd) |
| 58 | +} |
| 59 | + |
| 60 | +func startExperimentalControllers(cancel context.CancelFunc) error { |
| 61 | + setupLog := ctrl.Log.WithName("experimental-launcher") |
| 62 | + setupLog.Info("Starting experimental controllers") |
| 63 | + |
| 64 | + experimentalScheme := runtime.NewScheme() |
| 65 | + utilruntime.Must(corev1.AddToScheme(experimentalScheme)) |
| 66 | + utilruntime.Must(akov2next.AddToScheme(experimentalScheme)) |
| 67 | + |
| 68 | + kubeCfg, err := ctrl.GetConfig() |
| 69 | + if err != nil { |
| 70 | + return fmt.Errorf("failed to get kube config (is cluster running?): %w", err) |
| 71 | + } |
| 72 | + |
| 73 | + if err := setupControllerRuntimeLogger(); err != nil { |
| 74 | + return err |
| 75 | + } |
| 76 | + mgr, err := ctrl.NewManager(kubeCfg, ctrl.Options{ |
| 77 | + Scheme: experimentalScheme, |
| 78 | + Metrics: metricsserver.Options{BindAddress: ":8090"}, |
| 79 | + HealthProbeBindAddress: ":8091", |
| 80 | + }) |
| 81 | + if err != nil { |
| 82 | + return fmt.Errorf("failed to start experimental controller manager: %w", err) |
| 83 | + } |
| 84 | + |
| 85 | + for _, reconciler := range experimentalReconcilers { |
| 86 | + if err := reconciler.register(mgr); err != nil { |
| 87 | + return fmt.Errorf("failed to register experimental %s: %w", reconciler.name, err) |
| 88 | + } |
| 89 | + log.Printf("Experimental %s registered", reconciler.name) |
| 90 | + } |
| 91 | + |
| 92 | + go func() { |
| 93 | + if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil { |
| 94 | + setupLog.Error(err, "problem running experimental manager") |
| 95 | + cancel() |
| 96 | + } |
| 97 | + }() |
| 98 | + return nil |
| 99 | +} |
| 100 | + |
| 101 | +func setupControllerRuntimeLogger() error { |
| 102 | + zapLog, err := zap.NewDevelopment() |
| 103 | + if err != nil { |
| 104 | + return fmt.Errorf("failed to initialize logger: %w", err) |
| 105 | + } |
| 106 | + ctrlog.SetLogger(zapr.NewLogger(zapLog)) |
| 107 | + return nil |
| 108 | +} |
| 109 | + |
| 110 | +func startAKO(akoPath string) (*exec.Cmd, error) { |
| 111 | + cmd := exec.Command(akoPath, os.Args[1:]...) |
| 112 | + cmd.Stdout = os.Stdout |
| 113 | + cmd.Stderr = os.Stderr |
| 114 | + |
| 115 | + if err := cmd.Start(); err != nil { |
| 116 | + return nil, fmt.Errorf("failed to start AKO binary: %w", err) |
| 117 | + } |
| 118 | + return cmd, nil |
| 119 | +} |
| 120 | + |
| 121 | +func handleShutdown(ctx context.Context, cancel context.CancelFunc, akoCmd *exec.Cmd) { |
| 122 | + signalCh := make(chan os.Signal, 1) |
| 123 | + signal.Notify(signalCh, os.Interrupt, syscall.SIGTERM) |
| 124 | + |
| 125 | + select { |
| 126 | + case <-signalCh: |
| 127 | + log.Println("Received termination signal. Stopping everything...") |
| 128 | + cancel() |
| 129 | + if err := akoCmd.Process.Signal(syscall.SIGTERM); err != nil { |
| 130 | + log.Printf("Failed to terminate AKO subprocess: %v", err) |
| 131 | + } |
| 132 | + case <-ctx.Done(): |
| 133 | + log.Println("Experimental controllers stopped. Terminating AKO subprocess...") |
| 134 | + if err := akoCmd.Process.Kill(); err != nil { |
| 135 | + log.Printf("Failed to force-kill AKO subprocess: %v", err) |
| 136 | + } |
| 137 | + } |
| 138 | + _ = akoCmd.Wait() |
| 139 | + log.Println("Experimental launcher shut down completely.") |
| 140 | +} |
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