func (container *Container) allocatePort(eng *engine.Engine, port nat.Port, bindings nat.PortMap) error {
binding := bindings[port]
if container.hostConfig.PublishAllPorts && len(binding) == 0 {
binding = append(binding, nat.PortBinding{})
}
for i := 0; i < len(binding); i++ {
b := binding[i]
job := eng.Job("allocate_port", container.ID)
job.Setenv("HostIP", b.HostIp)
job.Setenv("HostPort", b.HostPort)
job.Setenv("Proto", port.Proto())
job.Setenv("ContainerPort", port.Port())
portEnv, err := job.Stdout.AddEnv()
if err != nil {
return err
}
if err := job.Run(); err != nil {
eng.Job("release_interface", container.ID).Run()
return err
}
b.HostIp = portEnv.Get("HostIP")
b.HostPort = portEnv.Get("HostPort")
binding[i] = b
}
bindings[port] = binding
return nil
}