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// Copyright 2015 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package environs
import (
"gopkg.in/juju/names.v2"
"github.com/juju/errors"
"github.com/juju/juju/instance"
"github.com/juju/juju/network"
)
// SupportsNetworking is a convenience helper to check if an environment
// supports networking. It returns an interface containing Environ and
// Networking in this case.
var SupportsNetworking = supportsNetworking
// Networking interface defines methods that environments
// with networking capabilities must implement.
type Networking interface {
// Subnets returns basic information about subnets known
// by the provider for the environment.
Subnets(inst instance.Id, subnetIds []network.Id) ([]network.SubnetInfo, error)
// NetworkInterfaces requests information about the network
// interfaces on the given instance.
NetworkInterfaces(instId instance.Id) ([]network.InterfaceInfo, error)
// SupportsSpaces returns whether the current environment supports
// spaces. The returned error satisfies errors.IsNotSupported(),
// unless a general API failure occurs.
SupportsSpaces() (bool, error)
// SupportsSpaceDiscovery returns whether the current environment
// supports discovering spaces from the provider. The returned error
// satisfies errors.IsNotSupported(), unless a general API failure occurs.
SupportsSpaceDiscovery() (bool, error)
// Spaces returns a slice of network.SpaceInfo with info, including
// details of all associated subnets, about all spaces known to the
// provider that have subnets available.
Spaces() ([]network.SpaceInfo, error)
// AllocateContainerAddresses allocates a static address for each of the
// container NICs in preparedInfo, hosted by the hostInstanceID. Returns the
// network config including all allocated addresses on success.
AllocateContainerAddresses(hostInstanceID instance.Id, containerTag names.MachineTag, preparedInfo []network.InterfaceInfo) ([]network.InterfaceInfo, error)
// ReleaseContainerAddresses releases the previously allocated
// addresses matching the interface infos passed in.
ReleaseContainerAddresses(interfaces []network.InterfaceInfo) error
}
// NetworkingEnviron combines the standard Environ interface with the
// functionality for networking.
type NetworkingEnviron interface {
// Environ represents a juju environment.
Environ
// Networking defines the methods of networking capable environments.
Networking
}
func supportsNetworking(environ Environ) (NetworkingEnviron, bool) {
ne, ok := environ.(NetworkingEnviron)
return ne, ok
}
// SupportsSpaces checks if the environment implements NetworkingEnviron
// and also if it supports spaces.
func SupportsSpaces(env Environ) bool {
netEnv, ok := supportsNetworking(env)
if !ok {
return false
}
ok, err := netEnv.SupportsSpaces()
if err != nil {
if !errors.IsNotSupported(err) {
logger.Errorf("checking model spaces support failed with: %v", err)
}
return false
}
return ok
}
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