// registerLinks writes the links to a file.
func (daemon *Daemon) registerLinks(container *container.Container, hostConfig *containertypes.HostConfig) error {
if hostConfig == nil || hostConfig.NetworkMode.IsUserDefined() {
return nil
}
for _, l := range hostConfig.Links {
name, alias, err := opts.ParseLink(l)
if err != nil {
return err
}
child, err := daemon.GetContainer(name)
if err != nil {
return fmt.Errorf("Could not get container for %s", name)
}
for child.HostConfig.NetworkMode.IsContainer() {
parts := strings.SplitN(string(child.HostConfig.NetworkMode), ":", 2)
child, err = daemon.GetContainer(parts[1])
if err != nil {
return fmt.Errorf("Could not get container for %s", parts[1])
}
}
if child.HostConfig.NetworkMode.IsHost() {
return runconfig.ErrConflictHostNetworkAndLinks
}
if err := daemon.registerLink(container, child, alias); err != nil {
return err
}
}
// After we load all the links into the daemon
// set them to nil on the hostconfig
return container.WriteHostConfig()
}
// BuildJoinOptions builds endpoint Join options from a given network.
func (container *Container) BuildJoinOptions(n libnetwork.Network) ([]libnetwork.EndpointOption, error) {
var joinOptions []libnetwork.EndpointOption
if epConfig, ok := container.NetworkSettings.Networks[n.Name()]; ok {
for _, str := range epConfig.Links {
name, alias, err := opts.ParseLink(str)
if err != nil {
return nil, err
}
joinOptions = append(joinOptions, libnetwork.CreateOptionAlias(name, alias))
}
}
return joinOptions, nil
}