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Currently store makes use of a static isReservedNetwork check to decide if a network needs to be stored in the distributed store or not. But it is better if the check is not static, but be determined based on the capability of the driver that backs the network. Hence introducing a new capability mechanism to the driver which it can express its capability during registration. Making use of first such capability : Scope. This can be expanded in the future for more such cases. Signed-off-by: Madhu Venugopal <madhu@docker.com>
70 lines
1.6 KiB
Go
70 lines
1.6 KiB
Go
package null
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import (
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"sync"
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"github.com/docker/libnetwork/driverapi"
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"github.com/docker/libnetwork/types"
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)
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const networkType = "null"
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type driver struct {
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network types.UUID
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sync.Mutex
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}
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// Init registers a new instance of null driver
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func Init(dc driverapi.DriverCallback) error {
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c := driverapi.Capability{
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Scope: driverapi.LocalScope,
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}
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return dc.RegisterDriver(networkType, &driver{}, c)
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}
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func (d *driver) Config(option map[string]interface{}) error {
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return nil
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}
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func (d *driver) CreateNetwork(id types.UUID, option map[string]interface{}) error {
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d.Lock()
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defer d.Unlock()
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if d.network != "" {
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return types.ForbiddenErrorf("only one instance of \"%s\" network is allowed", networkType)
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}
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d.network = id
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return nil
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}
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func (d *driver) DeleteNetwork(nid types.UUID) error {
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return types.ForbiddenErrorf("network of type \"%s\" cannot be deleted", networkType)
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}
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func (d *driver) CreateEndpoint(nid, eid types.UUID, epInfo driverapi.EndpointInfo, epOptions map[string]interface{}) error {
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return nil
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}
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func (d *driver) DeleteEndpoint(nid, eid types.UUID) error {
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return nil
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}
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func (d *driver) EndpointOperInfo(nid, eid types.UUID) (map[string]interface{}, error) {
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return make(map[string]interface{}, 0), nil
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}
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// Join method is invoked when a Sandbox is attached to an endpoint.
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func (d *driver) Join(nid, eid types.UUID, sboxKey string, jinfo driverapi.JoinInfo, options map[string]interface{}) error {
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return nil
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}
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// Leave method is invoked when a Sandbox detaches from an endpoint.
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func (d *driver) Leave(nid, eid types.UUID) error {
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return nil
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}
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func (d *driver) Type() string {
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return networkType
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}
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