func (r *DrvRegistry) registerIpamDriver(name string, driver ipamapi.Ipam, caps *ipamapi.Capability) error {
if strings.TrimSpace(name) == "" {
return fmt.Errorf("ipam driver name string cannot be empty")
}
r.Lock()
_, ok := r.ipamDrivers[name]
r.Unlock()
if ok {
return types.ForbiddenErrorf("ipam driver %q already registered", name)
}
locAS, glbAS, err := driver.GetDefaultAddressSpaces()
if err != nil {
return types.InternalErrorf("ipam driver %q failed to return default address spaces: %v", name, err)
}
if r.ifn != nil {
if err := r.ifn(name, driver, caps); err != nil {
return err
}
}
r.Lock()
r.ipamDrivers[name] = &ipamData{driver: driver, defaultLocalAddressSpace: locAS, defaultGlobalAddressSpace: glbAS, capability: caps}
r.Unlock()
return nil
}
func (ep *endpoint) assignAddress() error {
var (
ipam ipamapi.Ipam
err error
)
n := ep.getNetwork()
if n.Type() == "host" || n.Type() == "null" || n.Type() == "bridge" {
return nil
}
ipam, err = n.getController().getIpamDriver(n.ipamType)
if err != nil {
return err
}
for _, d := range n.getIPInfo() {
var addr *net.IPNet
addr, _, err = ipam.RequestAddress(d.PoolID, nil, nil)
if err == nil {
ep.Lock()
ep.iface.addr = addr
ep.iface.poolID = d.PoolID
ep.Unlock()
return nil
}
if err != ipamapi.ErrNoAvailableIPs {
return err
}
}
return fmt.Errorf("no available ip addresses on this network address pools: %s (%s)", n.Name(), n.ID())
}
func (ep *endpoint) assignAddressVersion(ipVer int, ipam ipamapi.Ipam) error {
var (
poolID *string
address **net.IPNet
prefAdd net.IP
progAdd net.IP
)
n := ep.getNetwork()
switch ipVer {
case 4:
poolID = &ep.iface.v4PoolID
address = &ep.iface.addr
prefAdd = ep.prefAddress
case 6:
poolID = &ep.iface.v6PoolID
address = &ep.iface.addrv6
prefAdd = ep.prefAddressV6
default:
return types.InternalErrorf("incorrect ip version number passed: %d", ipVer)
}
ipInfo := n.getIPInfo(ipVer)
// ipv6 address is not mandatory
if len(ipInfo) == 0 && ipVer == 6 {
return nil
}
// The address to program may be chosen by the user or by the network driver in one specific
// case to support backward compatibility with `docker daemon --fixed-cidrv6` use case
if prefAdd != nil {
progAdd = prefAdd
} else if *address != nil {
progAdd = (*address).IP
}
for _, d := range ipInfo {
if progAdd != nil && !d.Pool.Contains(progAdd) {
continue
}
addr, _, err := ipam.RequestAddress(d.PoolID, progAdd, ep.ipamOptions)
if err == nil {
ep.Lock()
*address = addr
*poolID = d.PoolID
ep.Unlock()
return nil
}
if err != ipamapi.ErrNoAvailableIPs || progAdd != nil {
return err
}
}
if progAdd != nil {
return types.BadRequestErrorf("Invalid address %s: It does not belong to any of this network's subnets", prefAdd)
}
return fmt.Errorf("no available IPv%d addresses on this network's address pools: %s (%s)", ipVer, n.Name(), n.ID())
}
func releasePools(ipam ipamapi.Ipam, icList []*api.IPAMConfig, pools map[string]string) {
for _, ic := range icList {
if err := ipam.ReleaseAddress(pools[ic.Subnet], net.ParseIP(ic.Gateway)); err != nil {
log.G(context.TODO()).Errorf("Failed to release address %s: %v", ic.Subnet, err)
}
}
for k, p := range pools {
if err := ipam.ReleasePool(p); err != nil {
log.G(context.TODO()).Errorf("Failed to release pool %s: %v", k, err)
}
}
}
func (ep *endpoint) assignAddressVersion(ipVer int, ipam ipamapi.Ipam) error {
var (
poolID *string
address **net.IPNet
)
n := ep.getNetwork()
switch ipVer {
case 4:
poolID = &ep.iface.v4PoolID
address = &ep.iface.addr
case 6:
poolID = &ep.iface.v6PoolID
address = &ep.iface.addrv6
default:
return types.InternalErrorf("incorrect ip version number passed: %d", ipVer)
}
ipInfo := n.getIPInfo(ipVer)
// ipv6 address is not mandatory
if len(ipInfo) == 0 && ipVer == 6 {
return nil
}
for _, d := range ipInfo {
var prefIP net.IP
if *address != nil {
prefIP = (*address).IP
}
addr, _, err := ipam.RequestAddress(d.PoolID, prefIP, nil)
if err == nil {
ep.Lock()
*address = addr
*poolID = d.PoolID
ep.Unlock()
return nil
}
if err != ipamapi.ErrNoAvailableIPs {
return err
}
}
return fmt.Errorf("no available IPv%d addresses on this network's address pools: %s (%s)", ipVer, n.Name(), n.ID())
}
func (n *network) requestPoolHelper(ipam ipamapi.Ipam, addressSpace, preferredPool, subPool string, options map[string]string, v6 bool) (string, *net.IPNet, map[string]string, error) {
for {
poolID, pool, meta, err := ipam.RequestPool(addressSpace, preferredPool, subPool, options, v6)
if err != nil {
return "", nil, nil, err
}
// If the network belongs to global scope or the pool was
// explicitely chosen or it is invalid, do not perform the overlap check.
if n.Scope() == datastore.GlobalScope || preferredPool != "" || !types.IsIPNetValid(pool) {
return poolID, pool, meta, nil
}
// Check for overlap and if none found, we have found the right pool.
if _, err := netutils.FindAvailableNetwork([]*net.IPNet{pool}); err == nil {
return poolID, pool, meta, nil
}
// Pool obtained in this iteration is
// overlapping. Hold onto the pool and don't release
// it yet, because we don't want ipam to give us back
// the same pool over again. But make sure we still do
// a deferred release when we have either obtained a
// non-overlapping pool or ran out of pre-defined
// pools.
defer func() {
if err := ipam.ReleasePool(poolID); err != nil {
log.Warnf("Failed to release overlapping pool %s while returning from pool request helper for network %s", pool, n.Name())
}
}()
// If this is a preferred pool request and the network
// is local scope and there is a overlap, we fail the
// network creation right here. The pool will be
// released in the defer.
if preferredPool != "" {
return "", nil, nil, fmt.Errorf("requested subnet %s overlaps in the host", preferredPool)
}
}
}
func (c *controller) RegisterIpamDriver(name string, driver ipamapi.Ipam) error {
if !config.IsValidName(name) {
return ErrInvalidName(name)
}
c.Lock()
_, ok := c.ipamDrivers[name]
c.Unlock()
if ok {
return driverapi.ErrActiveRegistration(name)
}
locAS, glbAS, err := driver.GetDefaultAddressSpaces()
if err != nil {
return fmt.Errorf("ipam driver %s failed to return default address spaces: %v", name, err)
}
c.Lock()
c.ipamDrivers[name] = &ipamData{driver: driver, defaultLocalAddressSpace: locAS, defaultGlobalAddressSpace: glbAS}
c.Unlock()
log.Debugf("Registering ipam provider: %s", name)
return nil
}
func (c *controller) registerIpamDriver(name string, driver ipamapi.Ipam, caps *ipamapi.Capability) error {
if !config.IsValidName(name) {
return ErrInvalidName(name)
}
c.Lock()
_, ok := c.ipamDrivers[name]
c.Unlock()
if ok {
return types.ForbiddenErrorf("ipam driver %q already registered", name)
}
locAS, glbAS, err := driver.GetDefaultAddressSpaces()
if err != nil {
return types.InternalErrorf("ipam driver %q failed to return default address spaces: %v", name, err)
}
c.Lock()
c.ipamDrivers[name] = &ipamData{driver: driver, defaultLocalAddressSpace: locAS, defaultGlobalAddressSpace: glbAS, capability: caps}
c.Unlock()
log.Debugf("Registering ipam driver: %q", name)
return nil
}
func (n *network) ipamReleaseVersion(ipVer int, ipam ipamapi.Ipam) {
var infoList *[]*IpamInfo
switch ipVer {
case 4:
infoList = &n.ipamV4Info
case 6:
infoList = &n.ipamV6Info
default:
log.Warnf("incorrect ip version passed to ipam release: %d", ipVer)
return
}
if len(*infoList) == 0 {
return
}
log.Debugf("releasing IPv%d pools from network %s (%s)", ipVer, n.Name(), n.ID())
for _, d := range *infoList {
if d.Gateway != nil {
if err := ipam.ReleaseAddress(d.PoolID, d.Gateway.IP); err != nil {
log.Warnf("Failed to release gateway ip address %s on delete of network %s (%s): %v", d.Gateway.IP, n.Name(), n.ID(), err)
}
}
if d.IPAMData.AuxAddresses != nil {
for k, nw := range d.IPAMData.AuxAddresses {
if d.Pool.Contains(nw.IP) {
if err := ipam.ReleaseAddress(d.PoolID, nw.IP); err != nil && err != ipamapi.ErrIPOutOfRange {
log.Warnf("Failed to release secondary ip address %s (%v) on delete of network %s (%s): %v", k, nw.IP, n.Name(), n.ID(), err)
}
}
}
}
if err := ipam.ReleasePool(d.PoolID); err != nil {
log.Warnf("Failed to release address pool %s on delete of network %s (%s): %v", d.PoolID, n.Name(), n.ID(), err)
}
}
*infoList = nil
}
func (n *network) ipamAllocateVersion(ipVer int, ipam ipamapi.Ipam) error {
var (
cfgList *[]*IpamConf
infoList *[]*IpamInfo
err error
)
switch ipVer {
case 4:
cfgList = &n.ipamV4Config
infoList = &n.ipamV4Info
case 6:
cfgList = &n.ipamV6Config
infoList = &n.ipamV6Info
default:
return types.InternalErrorf("incorrect ip version passed to ipam allocate: %d", ipVer)
}
if len(*cfgList) == 0 {
if ipVer == 6 {
return nil
}
*cfgList = []*IpamConf{{}}
}
*infoList = make([]*IpamInfo, len(*cfgList))
log.Debugf("Allocating IPv%d pools for network %s (%s)", ipVer, n.Name(), n.ID())
for i, cfg := range *cfgList {
if err = cfg.Validate(); err != nil {
return err
}
d := &IpamInfo{}
(*infoList)[i] = d
d.AddressSpace = n.addrSpace
d.PoolID, d.Pool, d.Meta, err = n.requestPoolHelper(ipam, n.addrSpace, cfg.PreferredPool, cfg.SubPool, n.ipamOptions, ipVer == 6)
if err != nil {
return err
}
defer func() {
if err != nil {
if err := ipam.ReleasePool(d.PoolID); err != nil {
log.Warnf("Failed to release address pool %s after failure to create network %s (%s)", d.PoolID, n.Name(), n.ID())
}
}
}()
if gws, ok := d.Meta[netlabel.Gateway]; ok {
if d.Gateway, err = types.ParseCIDR(gws); err != nil {
return types.BadRequestErrorf("failed to parse gateway address (%v) returned by ipam driver: %v", gws, err)
}
}
// If user requested a specific gateway, libnetwork will allocate it
// irrespective of whether ipam driver returned a gateway already.
// If none of the above is true, libnetwork will allocate one.
if cfg.Gateway != "" || d.Gateway == nil {
var gatewayOpts = map[string]string{
ipamapi.RequestAddressType: netlabel.Gateway,
}
if d.Gateway, _, err = ipam.RequestAddress(d.PoolID, net.ParseIP(cfg.Gateway), gatewayOpts); err != nil {
return types.InternalErrorf("failed to allocate gateway (%v): %v", cfg.Gateway, err)
}
}
// Auxiliary addresses must be part of the master address pool
// If they fall into the container addressable pool, libnetwork will reserve them
if cfg.AuxAddresses != nil {
var ip net.IP
d.IPAMData.AuxAddresses = make(map[string]*net.IPNet, len(cfg.AuxAddresses))
for k, v := range cfg.AuxAddresses {
if ip = net.ParseIP(v); ip == nil {
return types.BadRequestErrorf("non parsable secondary ip address (%s:%s) passed for network %s", k, v, n.Name())
}
if !d.Pool.Contains(ip) {
return types.ForbiddenErrorf("auxilairy address: (%s:%s) must belong to the master pool: %s", k, v, d.Pool)
}
// Attempt reservation in the container addressable pool, silent the error if address does not belong to that pool
if d.IPAMData.AuxAddresses[k], _, err = ipam.RequestAddress(d.PoolID, ip, nil); err != nil && err != ipamapi.ErrIPOutOfRange {
return types.InternalErrorf("failed to allocate secondary ip address (%s:%s): %v", k, v, err)
}
}
}
}
return nil
}