Adding tests and Create method
diff --git a/rackspace/db/v1/instances/delegate.go b/rackspace/db/v1/instances/delegate.go
new file mode 100644
index 0000000..93f4ce4
--- /dev/null
+++ b/rackspace/db/v1/instances/delegate.go
@@ -0,0 +1,233 @@
+package instances
+
+import (
+	"fmt"
+
+	"github.com/racker/perigee"
+	"github.com/rackspace/gophercloud"
+)
+
+// CreateOptsBuilder is the top-level interface for create options.
+type CreateOptsBuilder interface {
+	ToInstanceCreateMap() (map[string]interface{}, error)
+}
+
+// DatastoreOpts represents the configuration for how an instance stores data.
+type DatastoreOpts struct {
+	Version string
+	Type    string
+}
+
+func (opts DatastoreOpts) ToMap() (map[string]string, error) {
+	return map[string]string{
+		"version": opts.Version,
+		"type":    opts.Type,
+	}, nil
+}
+
+// DatabaseOpts is the struct responsible for configuring a database; often in
+// the context of an instance.
+type DatabaseOpts struct {
+	// Specifies the name of the database. Optional.
+	Name string
+
+	// Set of symbols and encodings. Optional; the default character set is utf8.
+	CharSet string
+
+	// Set of rules for comparing characters in a character set. Optional; the
+	// default value for collate is utf8_general_ci.
+	Collate string
+}
+
+func (opts DatabaseOpts) ToMap() (map[string]string, error) {
+	db := map[string]string{}
+	if opts.Name != "" {
+		db["name"] = opts.Name
+	}
+	if opts.CharSet != "" {
+		db["character_set"] = opts.CharSet
+	}
+	if opts.Collate != "" {
+		db["collate"] = opts.Collate
+	}
+	return db, nil
+}
+
+type DatabasesOpts []DatabaseOpts
+
+func (opts DatabasesOpts) ToMap() ([]map[string]string, error) {
+	var dbs []map[string]string
+	for _, db := range opts {
+		dbMap, err := db.ToMap()
+		if err != nil {
+			return dbs, err
+		}
+		dbs = append(dbs, dbMap)
+	}
+	return dbs, nil
+}
+
+// UserOpts is the struct responsible for configuring a user; often in the
+// context of an instance.
+type UserOpts struct {
+	// Specifies a name for the user.
+	Name string
+
+	// Specifies a password for the user.
+	Password string
+
+	// An array of databases that this user will connect to. The `name` field is
+	// the only requirement for each option.
+	Databases []DatabaseOpts
+
+	// Specifies the host from which a user is allowed to connect to the database.
+	// Possible values are a string containing an IPv4 address or "%" to allow
+	// connecting from any host. Optional; the default is "%".
+	Host string
+}
+
+func (opts UserOpts) ToMap() (map[string]interface{}, error) {
+	user := map[string]interface{}{}
+
+	if opts.Name != "" {
+		user["name"] = opts.Name
+	}
+	if opts.Password != "" {
+		user["password"] = opts.Password
+	}
+	if opts.Host != "" {
+		user["host"] = opts.Host
+	}
+
+	var dbs []map[string]string
+	for _, db := range opts.Databases {
+		dbs = append(dbs, map[string]string{"name": db.Name})
+	}
+	if len(dbs) > 0 {
+		user["databases"] = dbs
+	}
+
+	return user, nil
+}
+
+type UsersOpts []UserOpts
+
+func (opts UsersOpts) ToMap() ([]map[string]interface{}, error) {
+	var users []map[string]interface{}
+	for _, opt := range opts {
+		user, err := opt.ToMap()
+		if err != nil {
+			return users, err
+		}
+		users = append(users, user)
+	}
+	return users, nil
+}
+
+// CreateOpts is the struct responsible for configuring a new database instance.
+type CreateOpts struct {
+	// Either the integer UUID (in string form) of the flavor, or its URI
+	// reference as specified in the response from the List() call. Required.
+	FlavorRef string
+
+	// Specifies the volume size in gigabytes (GB). The value must be between 1
+	// and 300. Required.
+	Size int
+
+	// Name of the instance to create. The length of the name is limited to
+	// 255 characters and any characters are permitted. Optional.
+	Name string
+
+	// ID of the configuration group to associate with the instance. Optional.
+	ConfigID string
+
+	// Options to configure the type of datastore the instance will use. This is
+	// optional, and if excluded will default to MySQL.
+	Datastore *DatastoreOpts
+
+	// A slice of database information options.
+	Databases DatabasesOpts
+
+	// A slice of user information options.
+	Users UsersOpts
+
+	// Specifies the backup ID from which to restore the database instance. There
+	// are some things to be aware of before using this field.  When you execute
+	// the Restore Backup operation, a new database instance is created to store
+	// the backup whose ID is specified by the restorePoint attribute. This will
+	// mean that:
+	// - All users, passwords and access that were on the instance at the time of
+	// the backup will be restored along with the databases.
+	// - You can create new users or databases if you want, but they cannot be
+	// the same as the ones from the instance that was backed up.
+	RestorePoint string
+}
+
+func (opts CreateOpts) ToInstanceCreateMap() (map[string]interface{}, error) {
+	if opts.Size > 300 || opts.Size < 1 {
+		return nil, fmt.Errorf("Size (GB) must be between 1-300")
+	}
+	if opts.FlavorRef == "" {
+		return nil, fmt.Errorf("FlavorRef is a required field")
+	}
+
+	instance := map[string]interface{}{
+		"volume":    map[string]int{"size": opts.Size},
+		"flavorRef": opts.FlavorRef,
+	}
+
+	if opts.Name != "" {
+		instance["name"] = opts.Name
+	}
+	if opts.ConfigID != "" {
+		instance["configuration"] = opts.ConfigID
+	}
+	if opts.Datastore != nil {
+		ds, err := opts.Datastore.ToMap()
+		if err != nil {
+			return nil, err
+		}
+		instance["datastore"] = ds
+	}
+	if len(opts.Databases) > 0 {
+		dbs, err := opts.Databases.ToMap()
+		if err != nil {
+			return nil, err
+		}
+		instance["databases"] = dbs
+	}
+	if len(opts.Users) > 0 {
+		users, err := opts.Users.ToMap()
+		if err != nil {
+			return nil, err
+		}
+		instance["users"] = users
+	}
+	if opts.RestorePoint != "" {
+		instance["restorePoint"] = opts.RestorePoint
+	}
+
+	return map[string]interface{}{"instance": instance}, nil
+}
+
+// Create will provision a new Database instance.
+func Create(client *gophercloud.ServiceClient, opts CreateOptsBuilder) CreateResult {
+	var res CreateResult
+
+	reqBody, err := opts.ToInstanceCreateMap()
+	if err != nil {
+		res.Err = err
+		return res
+	}
+
+	resp, err := perigee.Request("POST", createURL(client), perigee.Options{
+		MoreHeaders: client.AuthenticatedHeaders(),
+		ReqBody:     &reqBody,
+		OkCodes:     []int{200},
+	})
+
+	res.Header = resp.HttpResponse.Header
+	res.Err = err
+
+	return res
+}
diff --git a/rackspace/db/v1/instances/delegate_test.go b/rackspace/db/v1/instances/delegate_test.go
new file mode 100644
index 0000000..8470c0c
--- /dev/null
+++ b/rackspace/db/v1/instances/delegate_test.go
@@ -0,0 +1,37 @@
+package instances
+
+import (
+	"testing"
+
+	th "github.com/rackspace/gophercloud/testhelper"
+	fake "github.com/rackspace/gophercloud/testhelper/client"
+)
+
+func TestCreate(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+
+	HandleCreateInstanceSuccessfully(t)
+
+	opts := CreateOpts{
+		Name:      "json_rack_instance",
+		FlavorRef: "1",
+		Databases: DatabasesOpts{
+			DatabaseOpts{CharSet: "utf8", Collate: "utf8_general_ci", Name: "sampledb"},
+			DatabaseOpts{Name: "nextround"},
+		},
+		Users: UsersOpts{
+			UserOpts{
+				Name:     "demouser",
+				Password: "demopassword",
+				Databases: DatabasesOpts{
+					DatabaseOpts{Name: "sampledb"},
+				},
+			},
+		},
+		Size:         2,
+		RestorePoint: "1234567890",
+	}
+
+	_ = Create(fake.ServiceClient(), opts)
+}