Example #1
0
// EnsureItExists make sure the network exists and return an error if it does not exists
// and cannot be created.
func (n *Network) EnsureItExists(ctx context.Context) error {
	networkResource, err := n.Inspect(ctx)
	if n.external {
		if client.IsErrNetworkNotFound(err) {
			// FIXME(vdemeester) introduce some libcompose error type
			return fmt.Errorf("Network %s declared as external, but could not be found. Please create the network manually using docker network create %s and try again", n.fullName(), n.fullName())
		}
		return err
	}
	if err != nil && client.IsErrNetworkNotFound(err) {
		return n.create(ctx)
	}
	if n.driver != "" && networkResource.Driver != n.driver {
		return fmt.Errorf("Network %q needs to be recreated - driver has changed", n.fullName())
	}
	if len(n.driverOptions) != 0 && !reflect.DeepEqual(networkResource.Options, n.driverOptions) {
		return fmt.Errorf("Network %q needs to be recreated - options have changed", n.fullName())
	}
	return err
}
Example #2
0
func validateExternalNetworks(
	ctx context.Context,
	dockerCli *command.DockerCli,
	externalNetworks []string) error {
	client := dockerCli.Client()

	for _, networkName := range externalNetworks {
		network, err := client.NetworkInspect(ctx, networkName)
		if err != nil {
			if dockerclient.IsErrNetworkNotFound(err) {
				return fmt.Errorf("network %q is declared as external, but could not be found. You need to create the network before the stack is deployed (with overlay driver)", networkName)
			}
			return err
		}
		if network.Scope != "swarm" {
			return fmt.Errorf("network %q is declared as external, but it is not in the right scope: %q instead of %q", networkName, network.Scope, "swarm")
		}
	}

	return nil
}