func (a *Allocator) taskCreateNetworkAttachments(t *api.Task, s *api.Service) {
// If task network attachments have already been filled in no
// need to do anything else.
if len(t.Networks) != 0 {
return
}
var networks []*api.NetworkAttachment
if isIngressNetworkNeeded(s) {
networks = append(networks, &api.NetworkAttachment{Network: a.netCtx.ingressNetwork})
}
a.store.View(func(tx store.ReadTx) {
// Always prefer NetworkAttachmentConfig in the TaskSpec
specNetworks := t.Spec.Networks
if len(specNetworks) == 0 && s != nil && len(s.Spec.Networks) != 0 {
specNetworks = s.Spec.Networks
}
for _, na := range specNetworks {
n := store.GetNetwork(tx, na.Target)
if n == nil {
continue
}
attachment := api.NetworkAttachment{Network: n}
attachment.Aliases = append(attachment.Aliases, na.Aliases...)
attachment.Addresses = append(attachment.Addresses, na.Addresses...)
networks = append(networks, &attachment)
}
})
taskUpdateNetworks(t, networks)
}
// allocate the IP addresses for a single network attachment of the task.
func (na *NetworkAllocator) allocateNetworkIPs(nAttach *api.NetworkAttachment) error {
var ip *net.IPNet
ipam, _, _, err := na.resolveIPAM(nAttach.Network)
if err != nil {
return errors.Wrap(err, "failed to resolve IPAM while allocating")
}
localNet := na.getNetwork(nAttach.Network.ID)
if localNet == nil {
return fmt.Errorf("could not find network allocator state for network %s", nAttach.Network.ID)
}
addresses := nAttach.Addresses
if len(addresses) == 0 {
addresses = []string{""}
}
for i, rawAddr := range addresses {
var addr net.IP
if rawAddr != "" {
var err error
addr, _, err = net.ParseCIDR(rawAddr)
if err != nil {
addr = net.ParseIP(rawAddr)
if addr == nil {
return errors.Wrapf(err, "could not parse address string %s", rawAddr)
}
}
}
for _, poolID := range localNet.pools {
var err error
ip, _, err = ipam.RequestAddress(poolID, addr, nil)
if err != nil && err != ipamapi.ErrNoAvailableIPs && err != ipamapi.ErrIPOutOfRange {
return errors.Wrap(err, "could not allocate IP from IPAM")
}
// If we got an address then we are done.
if err == nil {
ipStr := ip.String()
localNet.endpoints[ipStr] = poolID
addresses[i] = ipStr
nAttach.Addresses = addresses
return nil
}
}
}
return errors.New("could not find an available IP")
}
func (a *Allocator) taskCreateNetworkAttachments(t *api.Task, s *api.Service) {
// If task network attachments have already been filled in no
// need to do anything else.
if len(t.Networks) != 0 {
return
}
var networks []*api.NetworkAttachment
// The service to which this task belongs is trying to expose
// ports to the external world. Automatically attach the task
// to the ingress network.
if s != nil && s.Spec.Endpoint != nil && len(s.Spec.Endpoint.Ports) != 0 {
networks = append(networks, &api.NetworkAttachment{Network: a.netCtx.ingressNetwork})
}
a.store.View(func(tx store.ReadTx) {
// Always prefer NetworkAttachmentConfig in the TaskSpec
specNetworks := t.Spec.Networks
if len(specNetworks) == 0 && s != nil && len(s.Spec.Networks) != 0 {
specNetworks = s.Spec.Networks
}
for _, na := range specNetworks {
n := store.GetNetwork(tx, na.Target)
if n == nil {
continue
}
attachment := api.NetworkAttachment{Network: n}
attachment.Aliases = append(attachment.Aliases, na.Aliases...)
attachment.Addresses = append(attachment.Addresses, na.Addresses...)
networks = append(networks, &attachment)
}
})
taskUpdateNetworks(t, networks)
}