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use DHCP for aws datasource

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Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>
This commit is contained in:
Sven Dowideit
2017-03-13 10:23:57 +10:00
parent 64949bb888
commit d65f9518df
4 changed files with 66 additions and 27 deletions
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49
config/cloudinit/datasource/metadata/ec2/metadata.go
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@@ -31,7 +31,7 @@ import (
const (
DefaultAddress = "http://169.254.169.254/"
apiVersion = "2009-04-04/"
apiVersion = "latest/"
userdataPath = apiVersion + "user-data/"
metadataPath = apiVersion + "meta-data/"
)
@@ -48,6 +48,7 @@ func NewDatasource(root string) *MetadataService {
}
func (ms MetadataService) FetchMetadata() (datasource.Metadata, error) {
// see http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html
metadata := datasource.Metadata{}
metadata.NetworkConfig = netconf.NetworkConfig{}
@@ -80,24 +81,58 @@ func (ms MetadataService) FetchMetadata() (datasource.Metadata, error) {
return metadata, err
}
network := netconf.InterfaceConfig{}
// TODO: these are only on the first interface - it looks like you can have as many as you need...
if localAddr, err := ms.fetchAttribute("local-ipv4"); err == nil {
metadata.PrivateIPv4 = net.ParseIP(localAddr)
network.Addresses = append(network.Addresses, localAddr)
} else if _, ok := err.(pkg.ErrNotFound); !ok {
return metadata, err
}
if publicAddr, err := ms.fetchAttribute("public-ipv4"); err == nil {
metadata.PublicIPv4 = net.ParseIP(publicAddr)
network.Addresses = append(network.Addresses, publicAddr)
} else if _, ok := err.(pkg.ErrNotFound); !ok {
return metadata, err
}
metadata.NetworkConfig.Interfaces = make(map[string]netconf.InterfaceConfig)
metadata.NetworkConfig.Interfaces["eth0"] = network
if macs, err := ms.fetchAttributes("network/interfaces/macs"); err != nil {
for _, mac := range macs {
if deviceNumber, err := ms.fetchAttribute(fmt.Sprintf("network/interfaces/macs/%s/device-number", mac)); err != nil {
network := netconf.InterfaceConfig{
DHCP: true,
}
/* Looks like we must use DHCP for aws
// private ipv4
if subnetCidrBlock, err := ms.fetchAttribute(fmt.Sprintf("network/interfaces/macs/%s/subnet-ipv4-cidr-block", mac)); err != nil {
cidr := strings.Split(subnetCidrBlock, "/")
if localAddr, err := ms.fetchAttributes(fmt.Sprintf("network/interfaces/macs/%s/local-ipv4s", mac)); err != nil {
for _, addr := range localAddr {
network.Addresses = append(network.Addresses, addr+"/"+cidr[1])
}
}
}
// ipv6
if localAddr, err := ms.fetchAttributes(fmt.Sprintf("network/interfaces/macs/%s/ipv6s", mac)); err != nil {
if subnetCidrBlock, err := ms.fetchAttributes(fmt.Sprintf("network/interfaces/macs/%s/subnet-ipv6-cidr-block", mac)); err != nil {
for i, addr := range localAddr {
cidr := strings.Split(subnetCidrBlock[i], "/")
network.Addresses = append(network.Addresses, addr+"/"+cidr[1])
}
}
}
*/
// disabled - it looks to me like you don't actually put the public IP on the eth device
/* if publicAddr, err := ms.fetchAttributes(fmt.Sprintf("network/interfaces/macs/%s/public-ipv4s", mac)); err != nil {
if vpcCidrBlock, err := ms.fetchAttribute(fmt.Sprintf("network/interfaces/macs/%s/vpc-ipv4-cidr-block", mac)); err != nil {
cidr := strings.Split(vpcCidrBlock, "/")
network.Addresses = append(network.Addresses, publicAddr+"/"+cidr[1])
}
}
*/
metadata.NetworkConfig.Interfaces["eth"+deviceNumber] = network
}
}
}
return metadata, nil
}