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package servers
import (
"fmt"
"github.com/gophercloud/gophercloud"
"github.com/gophercloud/gophercloud/openstack/compute/v2/servers"
)
// IDFromName is a convenience function that returns a server's ID given its
// name. Errors when the number of items found is not one.
func IDFromName(client *gophercloud.ServiceClient, name string) (string, error) {
IDs, err := IDsFromName(client, name)
if err != nil {
return "", err
}
switch count := len(IDs); count {
case 0:
return "", gophercloud.ErrResourceNotFound{Name: name, ResourceType: "server"}
case 1:
return IDs[0], nil
default:
return "", gophercloud.ErrMultipleResourcesFound{Name: name, Count: count, ResourceType: "server"}
}
}
// IDsFromName returns zero or more IDs corresponding to a name. The returned
// error is only non-nil in case of failure.
func IDsFromName(client *gophercloud.ServiceClient, name string) ([]string, error) {
pages, err := servers.List(client, servers.ListOpts{
// nova list uses a name field as a regexp
Name: fmt.Sprintf("^%s$", name),
}).AllPages()
if err != nil {
return nil, err
}
all, err := servers.ExtractServers(pages)
if err != nil {
return nil, err
}
IDs := make([]string, len(all))
for i := range all {
IDs[i] = all[i].ID
}
return IDs, nil
}
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