add pre-install hook that verifies dashboard licenses

Signed-off-by: Burak Sekili <buraksekili@gmail.com>

cmd/bootstrap-post/main.go

@@ -7,7 +7,6 @@ import (
 	"os"
 	"tyk/tyk/bootstrap/data"
 	"tyk/tyk/bootstrap/helpers"
-	"tyk/tyk/bootstrap/license"
 	"tyk/tyk/bootstrap/readiness"
 )
 
@@ -18,23 +17,6 @@ func main() {
 		os.Exit(1)
 	}
 
-	dashboardLicenseKey, err := license.GetDashboardLicense()
-	if err != nil {
-		fmt.Println(err)
-		os.Exit(1)
-	}
-
-	licenseIsValid, err := license.ValidateDashboardLicense(dashboardLicenseKey)
-	if err != nil {
-		fmt.Println(err)
-	}
-	if licenseIsValid {
-		fmt.Println("Provided license is valid")
-	} else {
-		fmt.Println("Provided license is invalid")
-		os.Exit(1)
-	}
-
 	err = readiness.CheckIfRequiredDeploymentsAreReady()
 	if err != nil {
 		fmt.Println(err)

cmd/bootstrap-pre-install/main.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"tyk/tyk/bootstrap/license/preinstall"
+)
+
+func main() {
+	err := preinstall.PreHookInstall()
+	if err != nil {
+		fmt.Printf("Failed to run pre-hook job, err: %v", err)
+		os.Exit(1)
+	}
+
+	fmt.Println("Pre-Hook bootstrapping succeeded, the provided license is valid!")
+}

constants/constants.go

@@ -16,6 +16,7 @@ const (
 	TykDashboardProtoEnvVar             = "TYK_DASHBOARD_PROTO"
 	TykDashboardSvcEnvVar               = "TYK_DASHBOARD_SVC"
 	TykDashboardInsecureSkipVerify      = "TYK_DASHBOARD_INSECURE_SKIP_VERIFY"
+	TykDashboardLicenseEnvVarName       = "TYK_DB_LICENSEKEY"
 	TykDbListenport                     = "TYK_DB_LISTENPORT"
 	TykDbLicensekeyEnvVar               = "TYK_DB_LICENSEKEY"
 	TykAdminSecretEnvVar                = "TYK_ADMIN_SECRET"

license/license.go

@@ -8,12 +8,11 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"tyk/tyk/bootstrap/constants"
 )
 
-const TykDashboardLicenseEnvVarName = "TYK_DB_LICENSEKEY"
-
 func GetDashboardLicense() (string, error) {
-	license, ok := os.LookupEnv(TykDashboardLicenseEnvVarName)
+	license, ok := os.LookupEnv(constants.TykDashboardLicenseEnvVarName)
 	if !ok {
 		return "", errors.New("license env var is not present")
 	}

license/preinstall/preinstall.go

@@ -0,0 +1,28 @@
+// Package preinstall exposes an API to run necessary operations required in pre-install hook job of bootstrapping.
+// While bootstrapping Tyk Stack, users need to provide a valida Tyk License key.
+// In the pre-hook installation, the helper functions defined in this package verifies the validity of the license.
+package preinstall
+
+import (
+	"errors"
+	"tyk/tyk/bootstrap/license"
+)
+
+// PreHookInstall runs all required License validity operations that are required in pre-install hook.
+func PreHookInstall() error {
+	dashboardLicenseKey, err := license.GetDashboardLicense()
+	if err != nil {
+		return err
+	}
+
+	licenseIsValid, err := license.ValidateDashboardLicense(dashboardLicenseKey)
+	if err != nil {
+		return err
+	}
+
+	if !licenseIsValid {
+		return errors.New("provided license is invalid")
+	}
+
+	return nil
+}