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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
resources.
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: "https://my-openstack.com:5000/v2.0",
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