107 lines
3.1 KiB
Go
107 lines
3.1 KiB
Go
package ipamplugin
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"strings"
|
|
|
|
"github.com/docker/libnetwork/discoverapi"
|
|
"github.com/docker/libnetwork/ipamapi"
|
|
"github.com/docker/libnetwork/netlabel"
|
|
"github.com/weaveworks/weave/api"
|
|
. "github.com/weaveworks/weave/common"
|
|
)
|
|
|
|
type ipam struct {
|
|
weave *api.Client
|
|
}
|
|
|
|
func NewIpam(weave *api.Client) ipamapi.Ipam {
|
|
return &ipam{weave: weave}
|
|
}
|
|
|
|
func (i *ipam) GetDefaultAddressSpaces() (string, string, error) {
|
|
Log.Debugln("GetDefaultAddressSpaces")
|
|
return "weavelocal", "weaveglobal", nil
|
|
}
|
|
|
|
func (i *ipam) RequestPool(addressSpace, pool, subPool string, options map[string]string, v6 bool) (poolname string, subnet *net.IPNet, data map[string]string, err error) {
|
|
Log.Debugln("RequestPool", addressSpace, pool, subPool, options)
|
|
defer func() { Log.Debugln("RequestPool returning", poolname, subnet, data, err) }()
|
|
if pool == "" {
|
|
subnet, err = i.weave.DefaultSubnet()
|
|
} else {
|
|
_, subnet, err = net.ParseCIDR(pool)
|
|
}
|
|
if err != nil {
|
|
return
|
|
}
|
|
iprange := subnet
|
|
if subPool != "" {
|
|
if _, iprange, err = net.ParseCIDR(subPool); err != nil {
|
|
return
|
|
}
|
|
}
|
|
// Cunningly-constructed pool "name" which gives us what we need later
|
|
poolname = strings.Join([]string{"weave", subnet.String(), iprange.String()}, "-")
|
|
// Pass back a fake "gateway address"; we don't actually use it,
|
|
// so just give the network address.
|
|
data = map[string]string{netlabel.Gateway: subnet.String()}
|
|
return
|
|
}
|
|
|
|
func (i *ipam) ReleasePool(poolID string) error {
|
|
Log.Debugln("ReleasePool", poolID)
|
|
return nil
|
|
}
|
|
|
|
func (i *ipam) RequestAddress(poolID string, address net.IP, options map[string]string) (ip *net.IPNet, _ map[string]string, err error) {
|
|
Log.Debugln("RequestAddress", poolID, address, options)
|
|
defer func() { Log.Debugln("allocateIP returned", ip, err) }()
|
|
// If we pass magic string "_" to weave IPAM it stores the address under its own string
|
|
if poolID == "weavepool" { // old-style
|
|
ip, err = i.weave.AllocateIP("_")
|
|
return
|
|
}
|
|
parts := strings.Split(poolID, "-")
|
|
if len(parts) != 3 || parts[0] != "weave" {
|
|
err = fmt.Errorf("Unrecognized pool ID: %s", poolID)
|
|
return
|
|
}
|
|
var subnet, iprange *net.IPNet
|
|
if _, subnet, err = net.ParseCIDR(parts[1]); err != nil {
|
|
return
|
|
}
|
|
if address != nil { // try to claim specific address requested
|
|
if err = i.weave.ClaimIP("_", address); err != nil {
|
|
return
|
|
}
|
|
ip = &net.IPNet{IP: address, Mask: subnet.Mask}
|
|
} else {
|
|
if _, iprange, err = net.ParseCIDR(parts[2]); err != nil {
|
|
return
|
|
}
|
|
// We are lying slightly to IPAM here: the range is not a subnet
|
|
if ip, err = i.weave.AllocateIPInSubnet("_", iprange); err != nil {
|
|
return
|
|
}
|
|
ip.Mask = subnet.Mask // fix up the subnet we lied about
|
|
}
|
|
return
|
|
}
|
|
|
|
func (i *ipam) ReleaseAddress(poolID string, address net.IP) error {
|
|
Log.Debugln("ReleaseAddress", poolID, address)
|
|
return i.weave.ReleaseIP(address.String())
|
|
}
|
|
|
|
// Functions required by ipamapi "contract" but not actually used.
|
|
|
|
func (i *ipam) DiscoverNew(discoverapi.DiscoveryType, interface{}) error {
|
|
return nil
|
|
}
|
|
|
|
func (i *ipam) DiscoverDelete(discoverapi.DiscoveryType, interface{}) error {
|
|
return nil
|
|
}
|