diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6659e22f43b..2f4f37c76ad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,10 @@ We use *breaking* word for marking changes that are not backward compatible (rel
 
 ## Unreleased
 
+### Added
+
+- [#1118](https://github.com/improbable-eng/thanos/pull/1118) swift: Added support for cross-domain authentication by introducing `userDomainID`, `userDomainName`, `projectDomainID`, `projectDomainName`. Mark `tenantID`, `tenantName` as deprecated and encourage usage of `projectID`, `projectName`. 
+
 ## [v0.4.0](https://github.com/improbable-eng/thanos/releases/tag/v0.4.0) - 2019.05.3
 
 :warning: **IMPORTANT** :warning: This is the last release that supports gossip. From Thanos v0.5.0, gossip will be completely removed.
diff --git a/docs/storage.md b/docs/storage.md
index 8cd58a3dc7a..f74dc842d79 100644
--- a/docs/storage.md
+++ b/docs/storage.md
@@ -260,14 +260,20 @@ type: SWIFT
 config:
   auth_url: ""
   username: ""
+  user_domain_name: ""
+  user_domain_id: ""
   user_id: ""
   password: ""
   domain_id: ""
   domain_name: ""
-  tenant_id: ""
-  tenant_name: ""
+  project_id: ""
+  project_name: ""
+  project_domain_id: ""
+  project_domain_name: ""
   region_name: ""
   container_name: ""
+  tenant_id: ""
+  tenant_name: ""
 ```
 
 ## Other minio supported S3 object storages
diff --git a/pkg/objstore/swift/swift.go b/pkg/objstore/swift/swift.go
index 4a16464d3b4..4021909e37c 100644
--- a/pkg/objstore/swift/swift.go
+++ b/pkg/objstore/swift/swift.go
@@ -11,32 +11,43 @@ import (
 	"testing"
 	"time"
 
-	"github.com/improbable-eng/thanos/pkg/objstore"
-
 	"github.com/go-kit/kit/log"
+	"github.com/go-kit/kit/log/level"
 	"github.com/gophercloud/gophercloud"
 	"github.com/gophercloud/gophercloud/openstack"
 	"github.com/gophercloud/gophercloud/openstack/objectstorage/v1/containers"
 	"github.com/gophercloud/gophercloud/openstack/objectstorage/v1/objects"
 	"github.com/gophercloud/gophercloud/pagination"
+	"github.com/improbable-eng/thanos/pkg/objstore"
 	"github.com/pkg/errors"
-	"gopkg.in/yaml.v2"
+	yaml "gopkg.in/yaml.v2"
 )
 
 // DirDelim is the delimiter used to model a directory structure in an object store bucket.
 const DirDelim = "/"
 
 type SwiftConfig struct {
-	AuthUrl       string `yaml:"auth_url"`
-	Username      string `yaml:"username"`
-	UserId        string `yaml:"user_id"`
-	Password      string `yaml:"password"`
-	DomainId      string `yaml:"domain_id"`
-	DomainName    string `yaml:"domain_name"`
-	TenantID      string `yaml:"tenant_id"`
-	TenantName    string `yaml:"tenant_name"`
-	RegionName    string `yaml:"region_name"`
-	ContainerName string `yaml:"container_name"`
+	AuthUrl           string `yaml:"auth_url"`
+	Username          string `yaml:"username"`
+	UserDomainName    string `yaml:"user_domain_name"`
+	UserDomainID      string `yaml:"user_domain_id"`
+	UserId            string `yaml:"user_id"`
+	Password          string `yaml:"password"`
+	DomainId          string `yaml:"domain_id"`
+	DomainName        string `yaml:"domain_name"`
+	ProjectID         string `yaml:"project_id"`
+	ProjectName       string `yaml:"project_name"`
+	ProjectDomainID   string `yaml:"project_domain_id"`
+	ProjectDomainName string `yaml:"project_domain_name"`
+	RegionName        string `yaml:"region_name"`
+	ContainerName     string `yaml:"container_name"`
+
+	// Deprecated: Please use `project_id` instead.
+	// The term `tenant` is used in the deprecated OpenStack Identity v2.
+	TenantID string `yaml:"tenant_id"`
+	// Deprecated: Please use `project_name` instead.
+	// The term `tenant` is used in the deprecated OpenStack Identity v2.
+	TenantName string `yaml:"tenant_name"`
 }
 
 type Container struct {
@@ -58,13 +69,57 @@ func NewContainer(logger log.Logger, conf []byte) (*Container, error) {
 		Password:         sc.Password,
 		DomainID:         sc.DomainId,
 		DomainName:       sc.DomainName,
-		TenantID:         sc.TenantID,
-		TenantName:       sc.TenantName,
+		TenantID:         sc.ProjectID,
+		TenantName:       sc.ProjectName,
 
 		// Allow Gophercloud to re-authenticate automatically.
 		AllowReauth: true,
 	}
 
+	// The term `tenant` is used in the deprecated OpenStack Identity v2.
+	// In Identity v3 the term `project` is used instead.
+	switch {
+	case sc.TenantName != "":
+		level.Warn(logger).Log("msg", "usage of tenant_name is deprecated. use project_name instead")
+		authOpts.TenantName = sc.TenantName
+	case sc.TenantID != "":
+		level.Warn(logger).Log("msg", "usage of tenant_id is deprecated. use project_id instead")
+		authOpts.TenantID = sc.TenantID
+	case sc.ProjectName != "" || sc.ProjectID != "":
+		level.Info(logger).Log("msg", "using project_id or project_name")
+	}
+
+	// Support for cross-domain scoping (user in different domain than project).
+	// If a userDomainName or userDomainID is given, the user is scoped to this domain.
+	switch {
+	case sc.UserDomainName != "":
+		authOpts.DomainName = sc.UserDomainName
+	case sc.UserDomainID != "":
+		authOpts.DomainID = sc.UserDomainID
+	}
+
+	// A token can be scoped to a domain or project.
+	// The project can be in another domain than the user, which is indicated by setting either projectDomainName or projectDomainID.
+	switch {
+	case sc.ProjectDomainName != "":
+		authOpts.Scope = &gophercloud.AuthScope{
+			DomainName: sc.ProjectDomainName,
+		}
+	case sc.ProjectDomainID != "":
+		authOpts.Scope = &gophercloud.AuthScope{
+			DomainID: sc.ProjectDomainID,
+		}
+	}
+	if authOpts.Scope != nil {
+		level.Info(logger).Log("msg", "scoping to domain, project")
+		switch {
+		case sc.ProjectName != "":
+			authOpts.Scope.ProjectName = sc.ProjectName
+		case sc.ProjectID != "":
+			authOpts.Scope.ProjectID = sc.ProjectID
+		}
+	}
+
 	provider, err := openstack.AuthenticatedClient(authOpts)
 	if err != nil {
 		return nil, err
@@ -180,13 +235,19 @@ func (c *Container) deleteContainer(name string) error {
 
 func configFromEnv() SwiftConfig {
 	c := SwiftConfig{
-		AuthUrl:       os.Getenv("OS_AUTH_URL"),
-		Username:      os.Getenv("OS_USERNAME"),
-		Password:      os.Getenv("OS_PASSWORD"),
-		TenantID:      os.Getenv("OS_TENANT_ID"),
-		TenantName:    os.Getenv("OS_TENANT_NAME"),
-		RegionName:    os.Getenv("OS_REGION_NAME"),
-		ContainerName: os.Getenv("OS_CONTAINER_NAME"),
+		AuthUrl:           os.Getenv("OS_AUTH_URL"),
+		Username:          os.Getenv("OS_USERNAME"),
+		Password:          os.Getenv("OS_PASSWORD"),
+		RegionName:        os.Getenv("OS_REGION_NAME"),
+		ContainerName:     os.Getenv("OS_CONTAINER_NAME"),
+		ProjectID:         os.Getenv("OS_PROJECT_ID"),
+		ProjectName:       os.Getenv("OS_PROJECT_NAME"),
+		UserDomainID:      os.Getenv("OS_USER_DOMAIN_ID"),
+		UserDomainName:    os.Getenv("OS_USER_DOMAIN_NAME"),
+		ProjectDomainID:   os.Getenv("OS_PROJET_DOMAIN_ID"),
+		ProjectDomainName: os.Getenv("OS_PROJECT_DOMAIN_NAME"),
+		TenantID:          os.Getenv("OS_TENANT_ID"),
+		TenantName:        os.Getenv("OS_TENANT_NAME"),
 	}
 
 	return c