|
| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "flag" |
| 6 | + "fmt" |
| 7 | + "os" |
| 8 | + "os/signal" |
| 9 | + "syscall" |
| 10 | + "time" |
| 11 | + |
| 12 | + "go.uber.org/zap" |
| 13 | + meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| 14 | + "k8s.io/client-go/rest" |
| 15 | + "sigs.k8s.io/gateway-api/pkg/client/clientset/gateway/versioned" |
| 16 | +) |
| 17 | + |
| 18 | +var ( |
| 19 | + // Set during go build |
| 20 | + version string |
| 21 | + commit string |
| 22 | + date string |
| 23 | + |
| 24 | + // Command-line flags |
| 25 | + gatewayClass = flag.String("gatewayclass", "", "Tha name of the GatewayClass resource") |
| 26 | +) |
| 27 | + |
| 28 | +func main() { |
| 29 | + flag.Parse() |
| 30 | + |
| 31 | + if *gatewayClass == "" { |
| 32 | + fmt.Fprintln(os.Stderr, "-gatewayclass argument must be set") |
| 33 | + os.Exit(1) |
| 34 | + } |
| 35 | + |
| 36 | + logger, err := zap.NewProduction() |
| 37 | + if err != nil { |
| 38 | + fmt.Fprintf(os.Stderr, "Failed to initialize logging: %v\n", err) |
| 39 | + os.Exit(1) |
| 40 | + } |
| 41 | + sugar := logger.Sugar() |
| 42 | + |
| 43 | + sugar.Infow("Starting NGINX Gateway", |
| 44 | + "version", version, |
| 45 | + "commit", commit, |
| 46 | + "date", date) |
| 47 | + |
| 48 | + config, err := rest.InClusterConfig() |
| 49 | + if err != nil { |
| 50 | + sugar.Fatalw("Failed to create InClusterConfig", |
| 51 | + "error", err) |
| 52 | + } |
| 53 | + |
| 54 | + gatewayClient, err := versioned.NewForConfig(config) |
| 55 | + if err != nil { |
| 56 | + sugar.Fatalw("Failed to create a client for Gateway APIs", |
| 57 | + "error", err) |
| 58 | + } |
| 59 | + |
| 60 | + gc, err := gatewayClient.GatewayV1alpha2().GatewayClasses().Get(context.TODO(), *gatewayClass, meta_v1.GetOptions{}) |
| 61 | + if err != nil { |
| 62 | + sugar.Fatalw("Failed to get the GatewayClass", |
| 63 | + "name", *gatewayClass, |
| 64 | + "error", err) |
| 65 | + } |
| 66 | + |
| 67 | + if gc.Spec.ControllerName != "k8s-gateway.nginx.org/gateway" { |
| 68 | + sugar.Fatalw("Wrong ControllerName in the GatewayClass resource", |
| 69 | + "expected", "k8s-gateway.nginx.org/gateway", |
| 70 | + "got", "gc.Spec.ControllerName") |
| 71 | + } |
| 72 | + |
| 73 | + sugar.Infow("Gateway class info", |
| 74 | + "name", gc.Name, |
| 75 | + "creation timestamp", gc.CreationTimestamp) |
| 76 | + |
| 77 | + signalChan := make(chan os.Signal, 1) |
| 78 | + signal.Notify(signalChan, os.Interrupt, syscall.SIGTERM) |
| 79 | + go func() { |
| 80 | + sugar.Infow("Terminating because of the signal", |
| 81 | + "signal", <-signalChan) |
| 82 | + |
| 83 | + os.Exit(0) |
| 84 | + }() |
| 85 | + |
| 86 | + for { |
| 87 | + sugar.Infow("Gateway is running") |
| 88 | + time.Sleep(30 * time.Second) |
| 89 | + } |
| 90 | +} |
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