forked from flannel-io/flannel
/
alloc.go
62 lines (53 loc) · 1.56 KB
/
alloc.go
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// Copyright 2015 flannel authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package alloc
import (
"fmt"
"github.com/coreos/flannel/backend"
"github.com/coreos/flannel/pkg/ip"
"github.com/coreos/flannel/subnet"
"golang.org/x/net/context"
"sync"
)
func init() {
backend.Register("alloc", New)
}
type AllocBackend struct {
sm subnet.Manager
extIface *backend.ExternalInterface
}
func New(sm subnet.Manager, extIface *backend.ExternalInterface) (backend.Backend, error) {
be := AllocBackend{
sm: sm,
extIface: extIface,
}
return &be, nil
}
func (be *AllocBackend) RegisterNetwork(ctx context.Context, wg sync.WaitGroup, config *subnet.Config) (backend.Network, error) {
attrs := subnet.LeaseAttrs{
PublicIP: ip.FromIP(be.extIface.ExtAddr),
}
l, err := be.sm.AcquireLease(ctx, &attrs)
switch err {
case nil:
return &backend.SimpleNetwork{
SubnetLease: l,
ExtIface: be.extIface,
}, nil
case context.Canceled, context.DeadlineExceeded:
return nil, err
default:
return nil, fmt.Errorf("failed to acquire lease: %v", err)
}
}