add ctx to hook, handle hook errors

pkg/cli/cmds/server.go

 package cmds
 
 import (
+	"context"
+
 	"github.com/rancher/k3s/pkg/daemons/config"
 	"github.com/rancher/k3s/pkg/version"
 	"github.com/rancher/spur/cli"
@@ -55,7 +57,7 @@ type Server struct {
 	ClusterInit              bool
 	ClusterReset             bool
 	EncryptSecrets           bool
-	StartupHooks             []func(config.Control) error
+	StartupHooks             []func(context.Context, config.Control) error
 }
 
 var ServerConfig Server

pkg/server/server.go

@@ -61,7 +61,9 @@ func StartServer(ctx context.Context, config *Config) error {
 	}
 
 	for _, hook := range config.StartupHooks {
-		hook(config.ControlConfig)
+		if err := hook(ctx, config.ControlConfig); err != nil {
+			return errors.Wrap(err, "startup hook")
+		}
 	}
 
 	ip := net2.ParseIP(config.ControlConfig.BindAddress)

pkg/server/types.go

 package server
 
 import (
+	"context"
+
 	"github.com/rancher/k3s/pkg/daemons/config"
 )
 
@@ -10,5 +12,5 @@ type Config struct {
 	ControlConfig    config.Control
 	Rootless         bool
 	SupervisorPort   int
-	StartupHooks     []func(config.Control) error
+	StartupHooks     []func(context.Context, config.Control) error
 }