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metadata.go
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metadata.go
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package exoscale
import (
"net"
"strconv"
"strings"
"github.com/burmilla/os/config/cloudinit/datasource"
"github.com/burmilla/os/config/cloudinit/datasource/metadata"
"github.com/burmilla/os/config/cloudinit/pkg"
"github.com/burmilla/os/pkg/log"
)
const (
defaultAddress = "http://169.254.169.254/"
apiVersion = "1.0/"
userdataPath = apiVersion + "user-data"
metadataPath = apiVersion + "meta-data/"
)
type MetadataService struct {
metadata.Service
}
func NewDatasource(root string) *MetadataService {
if root == "" {
root = defaultAddress
}
return &MetadataService{
metadata.NewDatasourceWithCheckPath(
root,
apiVersion,
metadataPath,
userdataPath,
metadataPath,
nil,
),
}
}
func (ms MetadataService) IsAvailable() bool {
checkURL := ms.Root + ms.IsAvailableCheckPath
var err error
_, err = ms.Client.GetRetry(checkURL)
if err != nil {
log.Errorf("%s: %s (lastError: %v)", "IsAvailable", checkURL, err)
}
return (err == nil)
}
func (ms MetadataService) AvailabilityChanges() bool {
// TODO: if it can't find the network, maybe we can start it?
return false
}
func (ms MetadataService) FetchMetadata() (datasource.Metadata, error) {
metadata := datasource.Metadata{}
if sshKeys, err := ms.FetchAttributes("public-keys"); err == nil {
metadata.SSHPublicKeys = map[string]string{}
for i, sshkey := range sshKeys {
log.Printf("Found SSH key %d", i)
metadata.SSHPublicKeys[strconv.Itoa(i)] = sshkey
}
} else if _, ok := err.(pkg.ErrNotFound); !ok {
return metadata, err
}
if hostname, err := ms.FetchAttribute("local-hostname"); err == nil {
metadata.Hostname = strings.Split(hostname, " ")[0]
} else if _, ok := err.(pkg.ErrNotFound); !ok {
return metadata, err
}
if localAddr, err := ms.FetchAttribute("local-ipv4"); err == nil {
metadata.PrivateIPv4 = net.ParseIP(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)
} else if _, ok := err.(pkg.ErrNotFound); !ok {
return metadata, err
}
return metadata, nil
}
func (ms MetadataService) Type() string {
return "exoscale-metadata-service"
}