// MaintainInstance ensures the container's host has the required iptables and
// routing rules to make the container visible to both the host and other
// machines on the same subnet. This is important mostly when address allocation
// feature flag is enabled, as otherwise we don't create additional iptables
// rules or routes.
func (broker *lxdBroker) MaintainInstance(args environs.StartInstanceParams) error {
machineID := args.InstanceConfig.MachineId
// Default to using the host network until we can configure.
bridgeDevice := broker.agentConfig.Value(agent.LxdBridge)
if bridgeDevice == "" {
var err error
bridgeDevice, err = lxdclient.GetDefaultBridgeName()
if err != nil {
return err
}
}
// There's no InterfaceInfo we expect to get below.
_, err := prepareOrGetContainerInterfaceInfo(
broker.api,
machineID,
bridgeDevice,
false, // maintain, do not allocate.
broker.enableNAT,
args.NetworkInfo,
lxdLogger,
)
return err
}
func (broker *lxdBroker) StartInstance(args environs.StartInstanceParams) (*environs.StartInstanceResult, error) {
if args.InstanceConfig.HasNetworks() {
return nil, errors.New("starting lxd containers with networks is not supported yet")
}
machineId := args.InstanceConfig.MachineId
bridgeDevice := broker.agentConfig.Value(agent.LxcBridge)
if bridgeDevice == "" {
var err error
bridgeDevice, err = lxdclient.GetDefaultBridgeName()
if err != nil {
return nil, errors.Trace(err)
}
}
preparedInfo, err := prepareOrGetContainerInterfaceInfo(
broker.api,
machineId,
bridgeDevice,
true, // allocate if possible, do not maintain existing.
broker.enableNAT,
args.NetworkInfo,
lxdLogger,
)
if err != nil {
// It's not fatal (yet) if we couldn't pre-allocate addresses for the
// container.
logger.Warningf("failed to prepare container %q network config: %v", machineId, err)
} else {
args.NetworkInfo = preparedInfo
}
network := container.BridgeNetworkConfig(bridgeDevice, 0, args.NetworkInfo)
series := args.Tools.OneSeries()
args.InstanceConfig.MachineContainerType = instance.LXD
args.InstanceConfig.Tools = args.Tools[0]
config, err := broker.api.ContainerConfig()
if err != nil {
lxdLogger.Errorf("failed to get container config: %v", err)
return nil, err
}
if err := instancecfg.PopulateInstanceConfig(
args.InstanceConfig,
config.ProviderType,
config.AuthorizedKeys,
config.SSLHostnameVerification,
config.Proxy,
config.AptProxy,
config.AptMirror,
config.PreferIPv6,
config.EnableOSRefreshUpdate,
config.EnableOSUpgrade,
); err != nil {
lxdLogger.Errorf("failed to populate machine config: %v", err)
return nil, err
}
storageConfig := &container.StorageConfig{}
inst, hardware, err := broker.manager.CreateContainer(args.InstanceConfig, series, network, storageConfig, args.StatusCallback)
if err != nil {
return nil, err
}
return &environs.StartInstanceResult{
Instance: inst,
Hardware: hardware,
NetworkInfo: network.Interfaces,
}, nil
}