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Package gophercloud provides a multi-vendor interface to OpenStack-compatible
clouds. The library has a three-level hierarchy: providers, services, and
Provider structs represent the service providers that offer and manage a
collection of services. Examples of providers include: OpenStack, Rackspace,
HP. These are defined like so:
opts := gophercloud.AuthOptions{
IdentityEndpoint: "",
Username: "{username}",
Password: "{password}",
TenantID: "{tenant_id}",
provider, err := openstack.AuthenticatedClient(opts)
Service structs are specific to a provider and handle all of the logic and
operations for a particular OpenStack service. Examples of services include:
Compute, Object Storage, Block Storage. In order to define one, you need to
pass in the parent provider, like so:
opts := gophercloud.EndpointOpts{Region: "RegionOne"}
client := openstack.NewComputeV2(provider, opts)
Resource structs are the domain models that services make use of in order
to work with and represent the state of API resources:
server, err := servers.Get(client, "{serverId}").Extract()
Intermediate Result structs are returned for API operations, which allow
generic access to the HTTP headers, response body, and any errors associated
with the network transaction. To turn a result into a usable resource struct,
you must call the Extract method which is chained to the response, or an
Extract function from an applicable extension:
result := servers.Get(client, "{serverId}")
// Attempt to extract the disk configuration from the OS-DCF disk config
// extension:
config, err := diskconfig.ExtractGet(result)
All requests that enumerate a collection return a Pager struct that is used to
iterate through the results one page at a time. Use the EachPage method on that
Pager to handle each successive Page in a closure, then use the appropriate
extraction method from that request's package to interpret that Page as a slice
of results:
err := servers.List(client, nil).EachPage(func (page pagination.Page) (bool, error) {
s, err := servers.ExtractServers(page)
if err != nil {
return false, err
// Handle the []servers.Server slice.
// Return "false" or an error to prematurely stop fetching new pages.
return true, nil
This top-level package contains utility functions and data types that are used
throughout the provider and service packages. Of particular note for end users
are the AuthOptions and EndpointOpts structs.
package gophercloud