change doc URL if UI is running in k8s (#2484)

Co-authored-by: Prakash Senthil Vel <23444145+prakashsvmx@users.noreply.github.com>

restapi/embedded_spec.go

@@ -6379,6 +6379,9 @@ func init() {
         "isDirectPV": {
           "type": "boolean"
         },
+        "isK8S": {
+          "type": "boolean"
+        },
         "loginStrategy": {
           "type": "string",
           "enum": [
@@ -14681,6 +14684,9 @@ func init() {
         "isDirectPV": {
           "type": "boolean"
         },
+        "isK8S": {
+          "type": "boolean"
+        },
         "loginStrategy": {
           "type": "string",
           "enum": [

restapi/user_login.go

@@ -31,6 +31,7 @@ import (
 	authApi "github.com/minio/console/restapi/operations/auth"
 	"github.com/minio/madmin-go/v2"
 	"github.com/minio/minio-go/v7/pkg/credentials"
+	"github.com/minio/pkg/env"
 )
 
 func registerLoginHandlers(api *operations.ConsoleAPI) {
@@ -153,6 +154,15 @@ func getLoginResponse(params authApi.LoginParams) (*models.LoginResponse, *model
 	return loginResponse, nil
 }
 
+// isKubernetes returns true if minio is running in kubernetes.
+func isKubernetes() bool {
+	// Kubernetes env used to validate if we are
+	// indeed running inside a kubernetes pod
+	// is KUBERNETES_SERVICE_HOST
+	// https://github.com/kubernetes/kubernetes/blob/master/pkg/kubelet/kubelet_pods.go#L541
+	return env.Get("KUBERNETES_SERVICE_HOST", "") != ""
+}
+
 // getLoginDetailsResponse returns information regarding the Console authentication mechanism.
 func getLoginDetailsResponse(params authApi.LoginDetailParams, openIDProviders oauth2.OpenIDPCfg) (*models.LoginDetails, *models.Error) {
 	ctx, cancel := context.WithCancel(params.HTTPRequest.Context())
@@ -193,6 +203,7 @@ func getLoginDetailsResponse(params authApi.LoginDetailParams, openIDProviders o
 	loginDetails = &models.LoginDetails{
 		LoginStrategy: loginStrategy,
 		RedirectRules: redirectRules,
+		IsK8S:         isKubernetes(),
 	}
 	return loginDetails, nil
 }