// prepareOrGetContainerInterfaceInfo returns the necessary information to
// configure network interfaces of a container with allocated static
// IP addresses.
//
// TODO(dimitern): Before we start using this, we need to rename both
// the method and the network.InterfaceInfo type to be called
// InterfaceConfig.
func (st *State) prepareOrGetContainerInterfaceInfo(
containerTag names.MachineTag, allocateNewAddress bool) (
[]network.InterfaceInfo, error) {
var result params.MachineNetworkConfigResults
args := params.Entities{
Entities: []params.Entity{{Tag: containerTag.String()}},
}
facadeName := ""
if allocateNewAddress {
facadeName = "PrepareContainerInterfaceInfo"
} else {
facadeName = "GetContainerInterfaceInfo"
}
if err := st.facade.FacadeCall(facadeName, args, &result); err != nil {
return nil, err
}
if len(result.Results) != 1 {
return nil, errors.Errorf("expected 1 result, got %d", len(result.Results))
}
if err := result.Results[0].Error; err != nil {
return nil, err
}
ifaceInfo := make([]network.InterfaceInfo, len(result.Results[0].Config))
for i, cfg := range result.Results[0].Config {
ifaceInfo[i] = network.InterfaceInfo{
DeviceIndex: cfg.DeviceIndex,
MACAddress: cfg.MACAddress,
CIDR: cfg.CIDR,
MTU: cfg.MTU,
ProviderId: network.Id(cfg.ProviderId),
ProviderSubnetId: network.Id(cfg.ProviderSubnetId),
ProviderSpaceId: network.Id(cfg.ProviderSpaceId),
ProviderVLANId: network.Id(cfg.ProviderVLANId),
ProviderAddressId: network.Id(cfg.ProviderAddressId),
VLANTag: cfg.VLANTag,
InterfaceName: cfg.InterfaceName,
ParentInterfaceName: cfg.ParentInterfaceName,
InterfaceType: network.InterfaceType(cfg.InterfaceType),
Disabled: cfg.Disabled,
NoAutoStart: cfg.NoAutoStart,
ConfigType: network.InterfaceConfigType(cfg.ConfigType),
Address: network.NewAddress(cfg.Address),
DNSServers: network.NewAddresses(cfg.DNSServers...),
DNSSearchDomains: cfg.DNSSearchDomains,
GatewayAddress: network.NewAddress(cfg.GatewayAddress),
}
}
return ifaceInfo, nil
}
func (p *ProvisionerAPI) prepareOrGetContainerInterfaceInfo(args params.Entities, maintain bool) (params.MachineNetworkConfigResults, error) {
result := params.MachineNetworkConfigResults{
Results: make([]params.MachineNetworkConfigResult, len(args.Entities)),
}
netEnviron, hostMachine, canAccess, err := p.prepareContainerAccessEnvironment()
if err != nil {
return result, errors.Trace(err)
}
instId, err := hostMachine.InstanceId()
if errors.IsNotProvisioned(err) {
err = errors.NotProvisionedf("cannot prepare container network config: host machine %q", hostMachine)
return result, err
} else if err != nil {
return result, errors.Trace(err)
}
for i, entity := range args.Entities {
machineTag, err := names.ParseMachineTag(entity.Tag)
if err != nil {
result.Results[i].Error = common.ServerError(err)
continue
}
// The auth function (canAccess) checks that the machine is a
// top level machine (we filter those out next) or that the
// machine has the host as a parent.
container, err := p.getMachine(canAccess, machineTag)
if err != nil {
result.Results[i].Error = common.ServerError(err)
continue
} else if !container.IsContainer() {
err = errors.Errorf("cannot prepare network config for %q: not a container", machineTag)
result.Results[i].Error = common.ServerError(err)
continue
} else if ciid, cerr := container.InstanceId(); maintain == true && cerr == nil {
// Since we want to configure and create NICs on the
// container before it starts, it must also be not
// provisioned yet.
err = errors.Errorf("container %q already provisioned as %q", container, ciid)
result.Results[i].Error = common.ServerError(err)
continue
} else if cerr != nil && !errors.IsNotProvisioned(cerr) {
// Any other error needs to be reported.
result.Results[i].Error = common.ServerError(cerr)
continue
}
if err := hostMachine.SetContainerLinkLayerDevices(container); err != nil {
result.Results[i].Error = common.ServerError(err)
continue
}
containerDevices, err := container.AllLinkLayerDevices()
if err != nil {
result.Results[i].Error = common.ServerError(err)
continue
}
preparedInfo := make([]network.InterfaceInfo, len(containerDevices))
preparedOK := true
for j, device := range containerDevices {
parentDevice, err := device.ParentDevice()
if err != nil || parentDevice == nil {
err = errors.Errorf(
"cannot get parent %q of container device %q: %v",
device.ParentName(), device.Name(), err,
)
result.Results[i].Error = common.ServerError(err)
preparedOK = false
break
}
parentAddrs, err := parentDevice.Addresses()
if err != nil {
result.Results[i].Error = common.ServerError(err)
preparedOK = false
break
}
info := network.InterfaceInfo{
InterfaceName: device.Name(),
MACAddress: device.MACAddress(),
ConfigType: network.ConfigManual,
InterfaceType: network.InterfaceType(device.Type()),
NoAutoStart: !device.IsAutoStart(),
Disabled: !device.IsUp(),
MTU: int(device.MTU()),
ParentInterfaceName: parentDevice.Name(),
}
if len(parentAddrs) > 0 {
logger.Infof("host machine device %q has addresses %v", parentDevice.Name(), parentAddrs)
firstAddress := parentAddrs[0]
parentDeviceSubnet, err := firstAddress.Subnet()
if err != nil {
err = errors.Annotatef(err,
"cannot get subnet %q used by address %q of host machine device %q",
firstAddress.SubnetCIDR(), firstAddress.Value(), parentDevice.Name(),
)
result.Results[i].Error = common.ServerError(err)
preparedOK = false
break
}
info.ConfigType = network.ConfigStatic
info.CIDR = parentDeviceSubnet.CIDR()
info.ProviderSubnetId = parentDeviceSubnet.ProviderId()
info.VLANTag = parentDeviceSubnet.VLANTag()
} else {
logger.Infof("host machine device %q has no addresses %v", parentDevice.Name(), parentAddrs)
}
logger.Tracef("prepared info for container interface %q: %+v", info.InterfaceName, info)
preparedOK = true
preparedInfo[j] = info
}
if !preparedOK {
// Error result is already set.
continue
}
allocatedInfo, err := netEnviron.AllocateContainerAddresses(instId, machineTag, preparedInfo)
if err != nil {
result.Results[i].Error = common.ServerError(err)
continue
}
logger.Debugf("got allocated info from provider: %+v", allocatedInfo)
allocatedConfig := networkingcommon.NetworkConfigFromInterfaceInfo(allocatedInfo)
logger.Tracef("allocated network config: %+v", allocatedConfig)
result.Results[i].Config = allocatedConfig
}
return result, nil
}