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
}
// legacyPrepareOrGetContainerInterfaceInfo optionally allocates an address and
// returns information for configuring networking on a container. It accepts
// container tags as arguments.
func (p *ProvisionerAPI) legacyPrepareOrGetContainerInterfaceInfo(
args params.Entities,
provisionContainer bool,
) (
params.MachineNetworkConfigResults,
error,
) {
result := params.MachineNetworkConfigResults{
Results: make([]params.MachineNetworkConfigResult, len(args.Entities)),
}
// Some preparations first.
environ, host, canAccess, err := p.prepareContainerAccessEnvironment()
if err != nil {
return result, errors.Trace(err)
}
instId, err := host.InstanceId()
if err != nil && errors.IsNotProvisioned(err) {
// If the host machine is not provisioned yet, we have nothing
// to do. NotProvisionedf will append " not provisioned" to
// the message.
err = errors.NotProvisionedf("cannot allocate addresses: host machine %q", host)
return result, err
}
var subnet *state.Subnet
var subnetInfo network.SubnetInfo
var interfaceInfo network.InterfaceInfo
if environs.AddressAllocationEnabled() {
// We don't need a subnet unless we need to allocate a static IP.
subnet, subnetInfo, interfaceInfo, err = p.prepareAllocationNetwork(environ, instId)
if err != nil {
return result, errors.Annotate(err, "cannot allocate addresses")
}
} else {
var allInterfaceInfos []network.InterfaceInfo
allInterfaceInfos, err = environ.NetworkInterfaces(instId)
if err != nil {
return result, errors.Annotatef(err, "cannot instance %q interfaces", instId)
} else if len(allInterfaceInfos) == 0 {
return result, errors.New("no interfaces available")
}
// Currently we only support a single NIC per container, so we only need
// the information from the host instance's first NIC.
logger.Tracef("interfaces for instance %q: %v", instId, allInterfaceInfos)
interfaceInfo = allInterfaceInfos[0]
}
// Loop over the passed container tags.
for i, entity := range args.Entities {
tag, 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, tag)
if err != nil {
result.Results[i].Error = common.ServerError(err)
continue
} else if !container.IsContainer() {
err = errors.Errorf("cannot allocate address for %q: not a container", tag)
result.Results[i].Error = common.ServerError(err)
continue
} else if ciid, cerr := container.InstanceId(); provisionContainer == 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
}
var macAddress string
var address *state.IPAddress
if provisionContainer {
// Allocate and set an address.
macAddress = generateMACAddress()
address, err = p.allocateAddress(environ, subnet, host, container, instId, macAddress)
if err != nil {
err = errors.Annotatef(err, "failed to allocate an address for %q", container)
result.Results[i].Error = common.ServerError(err)
continue
}
} else {
id := container.Id()
addresses, err := p.st.AllocatedIPAddresses(id)
if err != nil {
logger.Warningf("failed to get Id for container %q: %v", tag, err)
result.Results[i].Error = common.ServerError(err)
continue
}
// TODO(dooferlad): if we get more than 1 address back, we ignore everything after
// the first. The calling function expects exactly one result though,
// so we don't appear to have a way of allocating >1 address to a
// container...
if len(addresses) != 1 {
logger.Warningf("got %d addresses for container %q - expected 1: %v", len(addresses), tag, err)
result.Results[i].Error = common.ServerError(err)
continue
}
address = addresses[0]
macAddress = address.MACAddress()
}
// Store it on the machine, construct and set an interface result.
dnsServers := make([]string, len(interfaceInfo.DNSServers))
for l, dns := range interfaceInfo.DNSServers {
dnsServers[l] = dns.Value
}
if macAddress == "" {
macAddress = interfaceInfo.MACAddress
}
interfaceType := string(interfaceInfo.InterfaceType)
if interfaceType == "" {
interfaceType = string(network.EthernetInterface)
}
// TODO(dimitern): Support allocating one address per NIC on
// the host, effectively creating the same number of NICs in
// the container.
result.Results[i] = params.MachineNetworkConfigResult{
Config: []params.NetworkConfig{{
DeviceIndex: interfaceInfo.DeviceIndex,
MACAddress: macAddress,
CIDR: subnetInfo.CIDR,
NetworkName: interfaceInfo.NetworkName,
ProviderId: string(interfaceInfo.ProviderId),
ProviderSubnetId: string(subnetInfo.ProviderId),
VLANTag: interfaceInfo.VLANTag,
InterfaceType: interfaceType,
InterfaceName: interfaceInfo.InterfaceName,
Disabled: interfaceInfo.Disabled,
NoAutoStart: interfaceInfo.NoAutoStart,
DNSServers: dnsServers,
ConfigType: string(network.ConfigStatic),
Address: address.Value(),
GatewayAddress: interfaceInfo.GatewayAddress.Value,
ExtraConfig: interfaceInfo.ExtraConfig,
}},
}
}
return result, nil
}