Introduce new config subnet api_key (#13793)

The earlier approach of using a license token for 
communicating with SUBNET is being replaced 
with a simpler mechanism of API keys. Unlike the 
license which is a JWT token, these API keys will 
be simple UUID tokens and don't have any embedded 
information in them. SUBNET would generate the 
API key on cluster registration, and then it would 
be saved in this config, to be used for subsequent 
communication with SUBNET.

cmd/common-main.go

@@ -193,6 +193,9 @@ func minioConfigToConsoleFeatures() {
 	if globalSubnetConfig.License != "" {
 		os.Setenv("CONSOLE_SUBNET_LICENSE", globalSubnetConfig.License)
 	}
+	if globalSubnetConfig.APIKey != "" {
+		os.Setenv("CONSOLE_SUBNET_API_KEY", globalSubnetConfig.APIKey)
+	}
 }
 
 func initConsoleServer() (*restapi.Server, error) {

cmd/config-current.go

@@ -191,7 +191,7 @@ func initHelp() {
 		config.HelpKV{
 			Key:         config.SubnetSubSys,
 			Type:        "string",
-			Description: "set subnet config for the cluster e.g. license token",
+			Description: "set subnet config for the cluster e.g. api key",
 			Optional:    true,
 		},
 	}
@@ -233,7 +233,7 @@ func initHelp() {
 		config.NotifyRedisSubSys:    notify.HelpRedis,
 		config.NotifyWebhookSubSys:  notify.HelpWebhook,
 		config.NotifyESSubSys:       notify.HelpES,
-		config.SubnetSubSys:         subnet.HelpLicense,
+		config.SubnetSubSys:         subnet.HelpSubnet,
 	}
 
 	config.RegisterHelpSubSys(helpMap)

internal/config/config.go

@@ -60,7 +60,8 @@ const (
 	RegionName = "name"
 	AccessKey  = "access_key"
 	SecretKey  = "secret_key"
-	License    = "license"
+	License    = "license" // Deprecated Dec 2021
+	APIKey     = "api_key"
 )
 
 // Top level config constants.

internal/config/constants.go

@@ -39,7 +39,8 @@ const (
 	EnvSiteName   = "MINIO_SITE_NAME"
 	EnvSiteRegion = "MINIO_SITE_REGION"
 
-	EnvMinIOSubnetLicense      = "MINIO_SUBNET_LICENSE"
+	EnvMinIOSubnetLicense      = "MINIO_SUBNET_LICENSE" // Deprecated Dec 2021
+	EnvMinIOSubnetAPIKey       = "MINIO_SUBNET_API_KEY"
 	EnvMinIOServerURL          = "MINIO_SERVER_URL"
 	EnvMinIOBrowserRedirectURL = "MINIO_BROWSER_REDIRECT_URL"
 	EnvRootDiskThresholdSize   = "MINIO_ROOTDISK_THRESHOLD_SIZE"

internal/config/subnet/api-key.go

@@ -18,7 +18,6 @@
 package subnet
 
 import (
-	jwtgo "github.com/golang-jwt/jwt/v4"
 	"github.com/minio/minio/internal/config"
 	"github.com/minio/pkg/env"
 )
@@ -27,17 +26,27 @@ var (
 	// DefaultKVS - default KV config for subnet settings
 	DefaultKVS = config.KVS{
 		config.KV{
-			Key:   config.License,
+			Key:   config.License, // Deprecated Dec 2021
+			Value: "",
+		},
+		config.KV{
+			Key:   config.APIKey,
 			Value: "",
 		},
 	}
 
-	// HelpLicense - provides help for license config
-	HelpLicense = config.HelpKVS{
+	// HelpSubnet - provides help for subnet api key config
+	HelpSubnet = config.HelpKVS{
 		config.HelpKV{
-			Key:         config.License,
+			Key:         config.License, // Deprecated Dec 2021
 			Type:        "string",
-			Description: "Subnet license token for the cluster",
+			Description: "[DEPRECATED use api_key] Subnet license token for the cluster",
+			Optional:    true,
+		},
+		config.HelpKV{
+			Key:         config.APIKey,
+			Type:        "string",
+			Description: "Subnet api key for the cluster",
 			Optional:    true,
 		},
 	}
@@ -45,18 +54,11 @@ var (
 
 // Config represents the subnet related configuration
 type Config struct {
-	// The subnet license token
+	// The subnet license token - Deprecated Dec 2021
 	License string `json:"license"`
-}
 
-func validateLicenseFormat(lic string) error {
-	if len(lic) == 0 {
-		return nil
-	}
-
-	// Only verifying that the string is a parseable JWT token as of now
-	_, _, err := new(jwtgo.Parser).ParseUnverified(lic, jwtgo.MapClaims{})
-	return err
+	// The subnet api key
+	APIKey string `json:"api_key"`
 }
 
 // LookupConfig - lookup config and override with valid environment settings if any.
@@ -66,6 +68,7 @@ func LookupConfig(kvs config.KVS) (cfg Config, err error) {
 	}
 
 	cfg.License = env.Get(config.EnvMinIOSubnetLicense, kvs.Get(config.License))
+	cfg.APIKey = env.Get(config.EnvMinIOSubnetAPIKey, kvs.Get(config.APIKey))
 
-	return cfg, validateLicenseFormat(cfg.License)
+	return cfg, nil
 }