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daemon: daemon.initNetworkController(): dont return the controller

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This method returned the network controller, only to set it on the daemon.

While making this change, also;

- update some error messages to be in the correct format
- use errors.Wrap() where possible
- extract configuring networks into a separate function to make the flow
  slightly easier to follow.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2022-04-26 10:32:10 +02:00
parent 787257f767
commit dbd575ef91
No known key found for this signature in database
GPG key ID: 76698F39D527CE8C
3 changed files with 43 additions and 37 deletions
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7
daemon/daemon.go
View file

@ -471,8 +471,11 @@ func (daemon *Daemon) restore() error {
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(activeSandboxes)
if err != nil {
// Initialize the network controller and configure network settings.
//
// Note that we cannot initialize the network controller earlier, as it
// needs to know if there's active sandboxes (running containers).
if err = daemon.initNetworkController(activeSandboxes); err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}

39
daemon/daemon_unix.go
View file

@ -836,42 +836,50 @@ func configureKernelSecuritySupport(config *config.Config, driverName string) er
return nil
}
func (daemon *Daemon) initNetworkController(activeSandboxes map[string]interface{}) (libnetwork.NetworkController, error) {
// initNetworkController initializes the libnetwork controller and configures
// network settings. If there's active sandboxes, configuration changes will not
// take effect.
func (daemon *Daemon) initNetworkController(activeSandboxes map[string]interface{}) error {
netOptions, err := daemon.networkOptions(daemon.PluginStore, activeSandboxes)
if err != nil {
return nil, err
return err
}
controller, err := libnetwork.New(netOptions...)
daemon.netController, err = libnetwork.New(netOptions...)
if err != nil {
return nil, fmt.Errorf("error obtaining controller instance: %v", err)
return fmt.Errorf("error obtaining controller instance: %v", err)
}
conf := daemon.configStore
if len(activeSandboxes) > 0 {
logrus.Info("There are old running containers, the network config will not take affect")
setHostGatewayIP(conf, controller)
return controller, nil
logrus.Info("there are running containers, updated network configuration will not take affect")
} else if err := configureNetworking(daemon.netController, daemon.configStore); err != nil {
return err
}
// Set HostGatewayIP to the default bridge's IP if it is empty
setHostGatewayIP(daemon.netController, daemon.configStore)
return nil
}
func configureNetworking(controller libnetwork.NetworkController, conf *config.Config) error {
// Initialize default network on "null"
if n, _ := controller.NetworkByName("none"); n == nil {
if _, err := controller.NewNetwork("null", "none", "", libnetwork.NetworkOptionPersist(true)); err != nil {
return nil, fmt.Errorf("Error creating default \"null\" network: %v", err)
return errors.Wrap(err, `error creating default "null" network`)
}
}
// Initialize default network on "host"
if n, _ := controller.NetworkByName("host"); n == nil {
if _, err := controller.NewNetwork("host", "host", "", libnetwork.NetworkOptionPersist(true)); err != nil {
return nil, fmt.Errorf("Error creating default \"host\" network: %v", err)
return errors.Wrap(err, `error creating default "host" network`)
}
}
// Clear stale bridge network
if n, err := controller.NetworkByName("bridge"); err == nil {
if err = n.Delete(); err != nil {
return nil, fmt.Errorf("could not delete the default bridge network: %v", err)
return errors.Wrap(err, `could not delete the default "bridge"" network`)
}
if len(conf.NetworkConfig.DefaultAddressPools.Value()) > 0 && !conf.LiveRestoreEnabled {
removeDefaultBridgeInterface()
@ -881,20 +889,17 @@ func (daemon *Daemon) initNetworkController(activeSandboxes map[string]interface
if !conf.DisableBridge {
// Initialize default driver "bridge"
if err := initBridgeDriver(controller, conf); err != nil {
return nil, err
return err
}
} else {
removeDefaultBridgeInterface()
}
// Set HostGatewayIP to the default bridge's IP if it is empty
setHostGatewayIP(conf, controller)
return controller, nil
return nil
}
// setHostGatewayIP sets cfg.HostGatewayIP to the default bridge's IP if it is empty.
func setHostGatewayIP(config *config.Config, controller libnetwork.NetworkController) {
func setHostGatewayIP(controller libnetwork.NetworkController, config *config.Config) {
if config.HostGatewayIP != nil {
return
}

34
daemon/daemon_windows.go
View file

@ -236,23 +236,23 @@ func configureMaxThreads(config *config.Config) error {
return nil
}
func (daemon *Daemon) initNetworkController(activeSandboxes map[string]interface{}) (libnetwork.NetworkController, error) {
func (daemon *Daemon) initNetworkController(activeSandboxes map[string]interface{}) error {
netOptions, err := daemon.networkOptions(nil, nil)
if err != nil {
return nil, err
return err
}
controller, err := libnetwork.New(netOptions...)
daemon.netController, err = libnetwork.New(netOptions...)
if err != nil {
return nil, fmt.Errorf("error obtaining controller instance: %v", err)
return errors.Wrap(err, "error obtaining controller instance")
}
hnsresponse, err := hcsshim.HNSListNetworkRequest("GET", "", "")
if err != nil {
return nil, err
return err
}
// Remove networks not present in HNS
for _, v := range controller.Networks() {
for _, v := range daemon.netController.Networks() {
hnsid := v.Info().DriverOptions()[winlibnetwork.HNSID]
found := false
@ -274,14 +274,14 @@ func (daemon *Daemon) initNetworkController(activeSandboxes map[string]interface
}
}
_, err = controller.NewNetwork("null", "none", "", libnetwork.NetworkOptionPersist(false))
_, err = daemon.netController.NewNetwork("null", "none", "", libnetwork.NetworkOptionPersist(false))
if err != nil {
return nil, err
return err
}
defaultNetworkExists := false
if network, err := controller.NetworkByName(runconfig.DefaultDaemonNetworkMode().NetworkName()); err == nil {
if network, err := daemon.netController.NetworkByName(runconfig.DefaultDaemonNetworkMode().NetworkName()); err == nil {
hnsid := network.Info().DriverOptions()[winlibnetwork.HNSID]
for _, v := range hnsresponse {
if hnsid == v.Id {
@ -308,7 +308,7 @@ func (daemon *Daemon) initNetworkController(activeSandboxes map[string]interface
return false
}
controller.WalkNetworks(s)
daemon.netController.WalkNetworks(s)
drvOptions := make(map[string]string)
nid := ""
@ -359,7 +359,7 @@ func (daemon *Daemon) initNetworkController(activeSandboxes map[string]interface
}
v6Conf := []*libnetwork.IpamConf{}
_, err := controller.NewNetwork(strings.ToLower(v.Type), name, nid,
_, err := daemon.netController.NewNetwork(strings.ToLower(v.Type), name, nid,
libnetwork.NetworkOptionGeneric(options.Generic{
netlabel.GenericData: netOption,
}),
@ -371,15 +371,14 @@ func (daemon *Daemon) initNetworkController(activeSandboxes map[string]interface
}
}
conf := daemon.configStore
if !conf.DisableBridge {
if !daemon.configStore.DisableBridge {
// Initialize default driver "bridge"
if err := initBridgeDriver(controller, conf); err != nil {
return nil, err
if err := initBridgeDriver(daemon.netController, daemon.configStore); err != nil {
return err
}
}
return controller, nil
return nil
}
func initBridgeDriver(controller libnetwork.NetworkController, config *config.Config) error {
@ -411,9 +410,8 @@ func initBridgeDriver(controller libnetwork.NetworkController, config *config.Co
}),
ipamOption,
)
if err != nil {
return fmt.Errorf("Error creating default network: %v", err)
return errors.Wrap(err, "error creating default network")
}
return nil