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interfaces.go
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interfaces.go
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// Copyright 2015 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package maas
import (
"encoding/json"
"fmt"
"strings"
"github.com/juju/errors"
"github.com/juju/gomaasapi"
"github.com/juju/juju/instance"
"github.com/juju/juju/network"
)
////////////////////////////////////////////////////////////////////////////////
// TODO(dimitern): The types below should be part of gomaasapi.
// LKK Card: https://canonical.leankit.com/Boards/View/101652562/119310616
type maasLinkMode string
const (
modeUnknown maasLinkMode = ""
modeStatic maasLinkMode = "static"
modeDHCP maasLinkMode = "dhcp"
modeLinkUp maasLinkMode = "link_up"
modeAuto maasLinkMode = "auto"
)
type maasInterfaceLink struct {
ID int `json:"id"`
Subnet *maasSubnet `json:"subnet,omitempty"`
IPAddress string `json:"ip_address,omitempty"`
Mode maasLinkMode `json:"mode"`
}
type maasInterfaceType string
const (
typeUnknown maasInterfaceType = ""
typePhysical maasInterfaceType = "physical"
typeVLAN maasInterfaceType = "vlan"
typeBond maasInterfaceType = "bond"
)
type maasInterface struct {
ID int `json:"id"`
Name string `json:"name"`
Type maasInterfaceType `json:"type"`
Enabled bool `json:"enabled"`
MACAddress string `json:"mac_address"`
VLAN maasVLAN `json:"vlan"`
EffectveMTU int `json:"effective_mtu"`
Links []maasInterfaceLink `json:"links"`
Parents []string `json:"parents"`
Children []string `json:"children"`
ResourceURI string `json:"resource_uri"`
}
type maasVLAN struct {
ID int `json:"id"`
Name string `json:"name"`
VID int `json:"vid"`
MTU int `json:"mtu"`
Fabric string `json:"fabric"`
ResourceURI string `json:"resource_uri"`
}
type maasSubnet struct {
ID int `json:"id"`
Name string `json:"name"`
Space string `json:"space"`
VLAN maasVLAN `json:"vlan"`
GatewayIP string `json:"gateway_ip"`
DNSServers []string `json:"dns_servers"`
CIDR string `json:"cidr"`
ResourceURI string `json:"resource_uri"`
}
func parseInterfaces(jsonBytes []byte) ([]maasInterface, error) {
var interfaces []maasInterface
if err := json.Unmarshal(jsonBytes, &interfaces); err != nil {
return nil, errors.Annotate(err, "parsing interfaces")
}
return interfaces, nil
}
// maasObjectNetworkInterfaces implements environs.NetworkInterfaces() using the
// new (1.9+) MAAS API, parsing the node details JSON embedded into the given
// maasObject to extract all the relevant InterfaceInfo fields. It returns an
// error satisfying errors.IsNotSupported() if it cannot find the required
// "interface_set" node details field.
func maasObjectNetworkInterfaces(maasObject *gomaasapi.MAASObject, subnetsMap map[string]network.Id) ([]network.InterfaceInfo, error) {
interfaceSet, ok := maasObject.GetMap()["interface_set"]
if !ok || interfaceSet.IsNil() {
// This means we're using an older MAAS API.
return nil, errors.NotSupportedf("interface_set")
}
// TODO(dimitern): Change gomaasapi JSONObject to give access to the raw
// JSON bytes directly, rather than having to do call MarshalJSON just so
// the result can be unmarshaled from it.
//
// LKK Card: https://canonical.leankit.com/Boards/View/101652562/119311323
rawBytes, err := interfaceSet.MarshalJSON()
if err != nil {
return nil, errors.Annotate(err, "cannot get interface_set JSON bytes")
}
interfaces, err := parseInterfaces(rawBytes)
if err != nil {
return nil, errors.Trace(err)
}
infos := make([]network.InterfaceInfo, 0, len(interfaces))
for i, iface := range interfaces {
// The below works for all types except bonds and their members.
parentName := strings.Join(iface.Parents, "")
var nicType network.InterfaceType
switch iface.Type {
case typePhysical:
nicType = network.EthernetInterface
children := strings.Join(iface.Children, "")
if parentName == "" && len(iface.Children) == 1 && strings.HasPrefix(children, "bond") {
// FIXME: Verify the bond exists, regardless of its name.
// This is a bond member, set the parent correctly (from
// Juju's perspective) - to the bond itself.
parentName = children
}
case typeBond:
parentName = ""
nicType = network.BondInterface
case typeVLAN:
nicType = network.VLAN_8021QInterface
}
nicInfo := network.InterfaceInfo{
DeviceIndex: i,
MACAddress: iface.MACAddress,
ProviderId: network.Id(fmt.Sprintf("%v", iface.ID)),
VLANTag: iface.VLAN.VID,
InterfaceName: iface.Name,
InterfaceType: nicType,
ParentInterfaceName: parentName,
Disabled: !iface.Enabled,
NoAutoStart: !iface.Enabled,
}
if len(iface.Links) == 0 {
logger.Debugf("interface %q has no links", iface.Name)
infos = append(infos, nicInfo)
continue
}
for _, link := range iface.Links {
nicInfo.ConfigType = maasLinkToInterfaceConfigType(string(link.Mode))
if link.IPAddress == "" && link.Subnet == nil {
logger.Debugf("interface %q link %d has neither subnet nor address", iface.Name, link.ID)
infos = append(infos, nicInfo)
} else {
// We set it here initially without a space, just so we don't
// lose it when we have no linked subnet below.
nicInfo.Address = network.NewAddress(link.IPAddress)
nicInfo.ProviderAddressId = network.Id(fmt.Sprintf("%v", link.ID))
}
if link.Subnet == nil {
logger.Debugf("interface %q link %d missing subnet", iface.Name, link.ID)
infos = append(infos, nicInfo)
continue
}
sub := link.Subnet
nicInfo.CIDR = sub.CIDR
nicInfo.ProviderSubnetId = network.Id(fmt.Sprintf("%v", sub.ID))
nicInfo.ProviderVLANId = network.Id(fmt.Sprintf("%v", sub.VLAN.ID))
// Now we know the subnet and space, we can update the address to
// store the space with it.
nicInfo.Address = network.NewAddressOnSpace(sub.Space, link.IPAddress)
spaceId, ok := subnetsMap[string(sub.CIDR)]
if !ok {
// The space we found is not recognised, no
// provider id available.
logger.Warningf("interface %q link %d has unrecognised space %q", iface.Name, link.ID, sub.Space)
} else {
nicInfo.Address.SpaceProviderId = spaceId
nicInfo.ProviderSpaceId = spaceId
}
gwAddr := network.NewAddressOnSpace(sub.Space, sub.GatewayIP)
nicInfo.DNSServers = network.NewAddressesOnSpace(sub.Space, sub.DNSServers...)
if ok {
gwAddr.SpaceProviderId = spaceId
for i := range nicInfo.DNSServers {
nicInfo.DNSServers[i].SpaceProviderId = spaceId
}
}
nicInfo.GatewayAddress = gwAddr
nicInfo.MTU = sub.VLAN.MTU
// Each link we represent as a separate InterfaceInfo, but with the
// same name and device index, just different addres, subnet, etc.
infos = append(infos, nicInfo)
}
}
return infos, nil
}
func maas2NetworkInterfaces(instance *maas2Instance, subnetsMap map[string]network.Id) ([]network.InterfaceInfo, error) {
interfaces := instance.machine.InterfaceSet()
infos := make([]network.InterfaceInfo, 0, len(interfaces))
for i, iface := range interfaces {
// The below works for all types except bonds and their members.
parentName := strings.Join(iface.Parents(), "")
var nicType network.InterfaceType
switch maasInterfaceType(iface.Type()) {
case typePhysical:
nicType = network.EthernetInterface
children := strings.Join(iface.Children(), "")
if parentName == "" && len(iface.Children()) == 1 && strings.HasPrefix(children, "bond") {
// FIXME: Verify the bond exists, regardless of its name.
// This is a bond member, set the parent correctly (from
// Juju's perspective) - to the bond itself.
parentName = children
}
case typeBond:
parentName = ""
nicType = network.BondInterface
case typeVLAN:
nicType = network.VLAN_8021QInterface
}
vlanTag := 0
if iface.VLAN() != nil {
vlanTag = iface.VLAN().VID()
}
nicInfo := network.InterfaceInfo{
DeviceIndex: i,
MACAddress: iface.MACAddress(),
ProviderId: network.Id(fmt.Sprintf("%v", iface.ID())),
VLANTag: vlanTag,
InterfaceName: iface.Name(),
InterfaceType: nicType,
ParentInterfaceName: parentName,
Disabled: !iface.Enabled(),
NoAutoStart: !iface.Enabled(),
}
if len(iface.Links()) == 0 {
logger.Debugf("interface %q has no links", iface.Name())
infos = append(infos, nicInfo)
continue
}
for _, link := range iface.Links() {
nicInfo.ConfigType = maasLinkToInterfaceConfigType(link.Mode())
if link.IPAddress() == "" && link.Subnet() == nil {
logger.Debugf("interface %q link %d has neither subnet nor address", iface.Name(), link.ID())
infos = append(infos, nicInfo)
} else {
// We set it here initially without a space, just so we don't
// lose it when we have no linked subnet below.
nicInfo.Address = network.NewAddress(link.IPAddress())
nicInfo.ProviderAddressId = network.Id(fmt.Sprintf("%v", link.ID()))
}
if link.Subnet() == nil {
logger.Debugf("interface %q link %d missing subnet", iface.Name(), link.ID())
infos = append(infos, nicInfo)
continue
}
sub := link.Subnet()
nicInfo.CIDR = sub.CIDR()
nicInfo.ProviderSubnetId = network.Id(fmt.Sprintf("%v", sub.ID()))
nicInfo.ProviderVLANId = network.Id(fmt.Sprintf("%v", sub.VLAN().ID()))
// Now we know the subnet and space, we can update the address to
// store the space with it.
nicInfo.Address = network.NewAddressOnSpace(sub.Space(), link.IPAddress())
spaceId, ok := subnetsMap[string(sub.CIDR())]
if !ok {
// The space we found is not recognised, no
// provider id available.
logger.Warningf("interface %q link %d has unrecognised space %q", iface.Name(), link.ID(), sub.Space())
} else {
nicInfo.Address.SpaceProviderId = spaceId
nicInfo.ProviderSpaceId = spaceId
}
gwAddr := network.NewAddressOnSpace(sub.Space(), sub.Gateway())
nicInfo.DNSServers = network.NewAddressesOnSpace(sub.Space(), sub.DNSServers()...)
if ok {
gwAddr.SpaceProviderId = spaceId
for i := range nicInfo.DNSServers {
nicInfo.DNSServers[i].SpaceProviderId = spaceId
}
}
nicInfo.GatewayAddress = gwAddr
nicInfo.MTU = sub.VLAN().MTU()
// Each link we represent as a separate InterfaceInfo, but with the
// same name and device index, just different addres, subnet, etc.
infos = append(infos, nicInfo)
}
}
return infos, nil
}
// NetworkInterfaces implements Environ.NetworkInterfaces.
func (environ *maasEnviron) NetworkInterfaces(instId instance.Id) ([]network.InterfaceInfo, error) {
inst, err := environ.getInstance(instId)
if err != nil {
return nil, errors.Trace(err)
}
subnetsMap, err := environ.subnetToSpaceIds()
if err != nil {
return nil, errors.Trace(err)
}
if environ.usingMAAS2() {
return maas2NetworkInterfaces(inst.(*maas2Instance), subnetsMap)
} else {
mi := inst.(*maas1Instance)
return maasObjectNetworkInterfaces(mi.maasObject, subnetsMap)
}
}
func maasLinkToInterfaceConfigType(mode string) network.InterfaceConfigType {
switch maasLinkMode(mode) {
case modeUnknown:
return network.ConfigUnknown
case modeDHCP:
return network.ConfigDHCP
case modeStatic, modeAuto:
return network.ConfigStatic
case modeLinkUp:
default:
}
return network.ConfigManual
}