func()

in cmd/core_plugin/network/networkd/networkd_linux.go [207:254]

• 31 lines of code
• 10 McCabe index (conditional complexity)

func (sn *Module) Setup(ctx context.Context, opts *service.Options) error {
	galog.Info("Setting up systemd-networkd interfaces.")

	var keepVlanConfigs []string

	// Write the config files.
	for index, nic := range opts.NICConfigs {
		filePath := sn.networkFile(nic.Interface.Name())

		if err := sn.writeEthernetConfig(nic, filePath, true, index == 0); err != nil {
			return fmt.Errorf("error writing network configs: %v", err)
		}

		// Make sure to rollback previously supported and now deprecated .network
		// and .netdev config files.
		galog.Debugf("Attempting to rollback deprecated .network file for: %s.", nic.Interface.Name())
		if _, err := rollbackConfiguration(sn.deprecatedNetworkFile(nic.Interface.Name())); err != nil {
			galog.Infof("Failed to rollback .network file: %v.", err)
		}

		// Setup the interface's VLANs.
		for _, vic := range nic.VlanInterfaces {
			if err := sn.writeVlanConfig(vic); err != nil {
				return fmt.Errorf("error writing vlan configs: %w", err)
			}
			keepVlanConfigs = append(keepVlanConfigs, vic.InterfaceName())
		}
	}

	// Cleanup any vlan interfaces that are no longer present.
	vlanCleanedup, err := sn.cleanupVlanConfigs(keepVlanConfigs)
	if err != nil {
		return fmt.Errorf("error cleaning up vlan configs: %w", err)
	}

	// If we've not changed any configuration we shouldn't have to reload
	// systemd-networkd.
	if len(opts.NICConfigs) == 0 && !vlanCleanedup {
		return nil
	}

	// Attempt to reload systemd-networkd configurations.
	if err := sn.Reload(ctx); err != nil {
		return fmt.Errorf("error reloading systemd-networkd daemon: %w", err)
	}

	return nil
}