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package gophercloud
import "errors"
var (
// ErrServiceNotFound is returned when no service in a service catalog matches
// the provided EndpointOpts. This is generally returned by provider service
// factory methods like "NewComputeV2()" and can mean that a service is not
// enabled for your account.
ErrServiceNotFound = errors.New("No suitable service could be found in the service catalog.")
// ErrEndpointNotFound is returned when no available endpoints match the
// provided EndpointOpts. This is also generally returned by provider service
// factory methods, and usually indicates that a region was specified
// incorrectly.
ErrEndpointNotFound = errors.New("No suitable endpoint could be found in the service catalog.")
// Availability indicates to whom a specific service endpoint is accessible:
// the internet at large, internal networks only, or only to administrators.
// Different identity services use different terminology for these. Identity v2
// lists them as different kinds of URLs within the service catalog ("adminURL",
// "internalURL", and "publicURL"), while v3 lists them as "Interfaces" in an
// endpoint's response.
type Availability string
const (
// AvailabilityAdmin indicates that an endpoint is only available to
// administrators.
AvailabilityAdmin Availability = "admin"
// AvailabilityPublic indicates that an endpoint is available to everyone on
// the internet.
AvailabilityPublic Availability = "public"
// AvailabilityInternal indicates that an endpoint is only available within
// the cluster's internal network.
AvailabilityInternal Availability = "internal"
// EndpointOpts specifies search criteria used by queries against an
// OpenStack service catalog. The options must contain enough information to
// unambiguously identify one, and only one, endpoint within the catalog.
// Usually, these are passed to service client factory functions in a provider
// package, like "rackspace.NewComputeV2()".
type EndpointOpts struct {
// Type [required] is the service type for the client (e.g., "compute",
// "object-store"). Generally, this will be supplied by the service client
// function, but a user-given value will be honored if provided.
Type string
// Name [optional] is the service name for the client (e.g., "nova") as it
// appears in the service catalog. Services can have the same Type but a
// different Name, which is why both Type and Name are sometimes needed.
Name string
// Region [required] is the geographic region in which the endpoint resides,
// generally specifying which datacenter should house your resources.
// Required only for services that span multiple regions.
Region string
// Availability [optional] is the visibility of the endpoint to be returned.
// Valid types include the constants AvailabilityPublic, AvailabilityInternal,
// or AvailabilityAdmin from this package.
// Availability is not required, and defaults to AvailabilityPublic. Not all
// providers or services offer all Availability options.
Availability Availability
EndpointLocator is an internal function to be used by provider implementations.
It provides an implementation that locates a single endpoint from a service
catalog for a specific ProviderClient based on user-provided EndpointOpts. The
provider then uses it to discover related ServiceClients.
type EndpointLocator func(EndpointOpts) (string, error)
// ApplyDefaults is an internal method to be used by provider implementations.
// It sets EndpointOpts fields if not already set, including a default type.
// Currently, EndpointOpts.Availability defaults to the public endpoint.
func (eo *EndpointOpts) ApplyDefaults(t string) {
if eo.Type == "" {
eo.Type = t
if eo.Availability == "" {
eo.Availability = AvailabilityPublic
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