unistack-org/cloudinit
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feat(datasource/metadata): Add datasource for CloudSigma

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This commit is contained in:
Kiril Vladimirov 2014-08-05 12:50:21 +03:00
parent 57950b3ed9
commit 7320a2cbf2
3 changed files with 306 additions and 7 deletions
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20
coreos-cloudinit.go
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@ -10,6 +10,7 @@ import (
"github.com/coreos/coreos-cloudinit/datasource"
"github.com/coreos/coreos-cloudinit/datasource/configdrive"
"github.com/coreos/coreos-cloudinit/datasource/file"
"github.com/coreos/coreos-cloudinit/datasource/metadata/cloudsigma"
"github.com/coreos/coreos-cloudinit/datasource/metadata/ec2"
"github.com/coreos/coreos-cloudinit/datasource/proc_cmdline"
"github.com/coreos/coreos-cloudinit/datasource/url"
@ -29,12 +30,13 @@ var (
printVersion bool
ignoreFailure bool
sources struct {
file string
configDrive string
metadataService bool
ec2MetadataService string
url string
procCmdLine bool
file string
configDrive string
metadataService bool
ec2MetadataService string
cloudSigmaMetadataService bool
url string
procCmdLine bool
}
convertNetconf string
workspace string
@ -48,6 +50,7 @@ func init() {
flag.StringVar(&sources.configDrive, "from-configdrive", "", "Read data from provided cloud-drive directory")
flag.BoolVar(&sources.metadataService, "from-metadata-service", false, "[DEPRECATED - Use -from-ec2-metadata] Download data from metadata service")
flag.StringVar(&sources.ec2MetadataService, "from-ec2-metadata", "", "Download data from the provided metadata service")
flag.BoolVar(&sources.cloudSigmaMetadataService, "from-cloudsigma-metadata", false, "Download data from CloudSigma server context")
flag.StringVar(&sources.url, "from-url", "", "Download user-data from provided url")
flag.BoolVar(&sources.procCmdLine, "from-proc-cmdline", false, fmt.Sprintf("Parse %s for '%s=<url>', using the cloud-config served by an HTTP GET to <url>", proc_cmdline.ProcCmdlineLocation, proc_cmdline.ProcCmdlineCloudConfigFlag))
flag.StringVar(&convertNetconf, "convert-netconf", "", "Read the network config provided in cloud-drive and translate it from the specified format into networkd unit files (requires the -from-configdrive flag)")
@ -85,7 +88,7 @@ func main() {
dss := getDatasources()
if len(dss) == 0 {
fmt.Println("Provide at least one of --from-file, --from-configdrive, --from-ec2-metadata, --from-url or --from-proc-cmdline")
fmt.Println("Provide at least one of --from-file, --from-configdrive, --from-ec2-metadata, --from-cloudsigma-metadata, --from-url or --from-proc-cmdline")
os.Exit(1)
}
@ -217,6 +220,9 @@ func getDatasources() []datasource.Datasource {
if sources.ec2MetadataService != "" {
dss = append(dss, ec2.NewDatasource(sources.ec2MetadataService))
}
if sources.cloudSigmaMetadataService {
dss = append(dss, cloudsigma.NewServerContextService())
}
if sources.procCmdLine {
dss = append(dss, proc_cmdline.NewDatasource())
}

141
datasource/metadata/cloudsigma/server_context.go Normal file
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@ -0,0 +1,141 @@
package cloudsigma
import (
"encoding/base64"
"encoding/json"
"os"
"strings"
"github.com/coreos/coreos-cloudinit/third_party/github.com/cloudsigma/cepgo"
)
const (
userDataFieldName = "cloudinit-user-data"
)
type serverContextService struct {
client interface {
All() (interface{}, error)
Key(string) (interface{}, error)
Meta() (map[string]string, error)
FetchRaw(string) ([]byte, error)
}
}
func NewServerContextService() *serverContextService {
return &serverContextService{
client: cepgo.NewCepgo(),
}
}
func (_ *serverContextService) IsAvailable() bool {
productNameFile, err := os.Open("/sys/class/dmi/id/product_name")
if err != nil {
return false
}
productName := make([]byte, 10)
_, err = productNameFile.Read(productName)
return err == nil && string(productName) == "CloudSigma"
}
func (_ *serverContextService) AvailabilityChanges() bool {
return true
}
func (_ *serverContextService) ConfigRoot() string {
return ""
}
func (_ *serverContextService) Type() string {
return "server-context"
}
func (scs *serverContextService) FetchMetadata() ([]byte, error) {
var (
inputMetadata struct {
Name string `json:"name"`
UUID string `json:"uuid"`
Meta map[string]string `json:"meta"`
Nics []struct {
Runtime struct {
InterfaceType string `json:"interface_type"`
IPv4 struct {
IP string `json:"uuid"`
} `json:"ip_v4"`
} `json:"runtime"`
} `json:"nics"`
}
outputMetadata struct {
Hostname string `json:"name"`
PublicKeys map[string]string `json:"public_keys"`
LocalIPv4 string `json:"local-ipv4"`
PublicIPv4 string `json:"public-ipv4"`
}
)
rawMetadata, err := scs.client.FetchRaw("")
if err != nil {
return []byte{}, err
}
err = json.Unmarshal(rawMetadata, &inputMetadata)
if err != nil {
return []byte{}, err
}
if inputMetadata.Name != "" {
outputMetadata.Hostname = inputMetadata.Name
} else {
outputMetadata.Hostname = inputMetadata.UUID
}
if key, ok := inputMetadata.Meta["ssh_public_key"]; ok {
splitted := strings.Split(key, " ")
outputMetadata.PublicKeys = make(map[string]string)
outputMetadata.PublicKeys[splitted[len(splitted)-1]] = key
}
for _, nic := range inputMetadata.Nics {
if nic.Runtime.IPv4.IP != "" {
if nic.Runtime.InterfaceType == "public" {
outputMetadata.PublicIPv4 = nic.Runtime.IPv4.IP
} else {
outputMetadata.LocalIPv4 = nic.Runtime.IPv4.IP
}
}
}
return json.Marshal(outputMetadata)
}
func (scs *serverContextService) FetchUserdata() ([]byte, error) {
metadata, err := scs.client.Meta()
if err != nil {
return []byte{}, err
}
userData, ok := metadata[userDataFieldName]
if ok && isBase64Encoded(userDataFieldName, metadata) {
if decodedUserData, err := base64.StdEncoding.DecodeString(userData); err == nil {
return decodedUserData, nil
} else {
return []byte{}, nil
}
}
return []byte(userData), nil
}
func isBase64Encoded(field string, userdata map[string]string) bool {
base64Fields, ok := userdata["base64_fields"]
if !ok {
return false
}
for _, base64Field := range strings.Split(base64Fields, ",") {
if field == base64Field {
return true
}
}
return false
}

152
datasource/metadata/cloudsigma/server_context_test.go Normal file
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@ -0,0 +1,152 @@
package cloudsigma
import (
"encoding/json"
"reflect"
"testing"
)
type fakeCepgoClient struct {
raw []byte
meta map[string]string
keys map[string]interface{}
err error
}
func (f *fakeCepgoClient) All() (interface{}, error) {
return f.keys, f.err
}
func (f *fakeCepgoClient) Key(key string) (interface{}, error) {
return f.keys[key], f.err
}
func (f *fakeCepgoClient) Meta() (map[string]string, error) {
return f.meta, f.err
}
func (f *fakeCepgoClient) FetchRaw(key string) ([]byte, error) {
return f.raw, f.err
}
func TestServerContextFetchMetadata(t *testing.T) {
var metadata struct {
Hostname string `json:"name"`
PublicKeys map[string]string `json:"public_keys"`
LocalIPv4 string `json:"local-ipv4"`
PublicIPv4 string `json:"public-ipv4"`
}
client := new(fakeCepgoClient)
scs := NewServerContextService()
scs.client = client
client.raw = []byte(`{
"context": true,
"cpu": 4000,
"cpu_model": null,
"cpus_instead_of_cores": false,
"enable_numa": false,
"grantees": [],
"hv_relaxed": false,
"hv_tsc": false,
"jobs": [],
"mem": 4294967296,
"meta": {
"base64_fields": "cloudinit-user-data",
"cloudinit-user-data": "I2Nsb3VkLWNvbmZpZwoKaG9zdG5hbWU6IGNvcmVvczE=",
"ssh_public_key": "ssh-rsa AAAAB3NzaC1yc2E.../hQ5D5 john@doe"
},
"name": "coreos",
"nics": [
{
"runtime": {
"interface_type": "public",
"ip_v4": {
"uuid": "31.171.251.74"
},
"ip_v6": null
},
"vlan": null
}
],
"smp": 2,
"status": "running",
"uuid": "20a0059b-041e-4d0c-bcc6-9b2852de48b3"
}`)
metadataBytes, err := scs.FetchMetadata()
if err != nil {
t.Error(err.Error())
}
if err := json.Unmarshal(metadataBytes, &metadata); err != nil {
t.Error(err.Error())
}
if metadata.Hostname != "coreos" {
t.Errorf("Hostname is not 'coreos' but %s instead", metadata.Hostname)
}
if metadata.PublicKeys["john@doe"] != "ssh-rsa AAAAB3NzaC1yc2E.../hQ5D5 john@doe" {
t.Error("Public SSH Keys are not being read properly")
}
if metadata.LocalIPv4 != "" {
t.Errorf("Local IP is not empty but %s instead", metadata.LocalIPv4)
}
if metadata.PublicIPv4 != "31.171.251.74" {
t.Errorf("Local IP is not 31.171.251.74 but %s instead", metadata.PublicIPv4)
}
}
func TestServerContextFetchUserdata(t *testing.T) {
client := new(fakeCepgoClient)
scs := NewServerContextService()
scs.client = client
userdataSets := []struct {
in map[string]string
err bool
out []byte
}{
{map[string]string{
"base64_fields": "cloudinit-user-data",
"cloudinit-user-data": "aG9zdG5hbWU6IGNvcmVvc190ZXN0",
}, false, []byte("hostname: coreos_test")},
{map[string]string{
"cloudinit-user-data": "#cloud-config\\nhostname: coreos1",
}, false, []byte("#cloud-config\\nhostname: coreos1")},
{map[string]string{}, false, []byte{}},
}
for i, set := range userdataSets {
client.meta = set.in
got, err := scs.FetchUserdata()
if (err != nil) != set.err {
t.Errorf("case %d: bad error state (got %t, want %t)", i, err != nil, set.err)
}
if !reflect.DeepEqual(got, set.out) {
t.Errorf("case %d: got %s, want %s", i, got, set.out)
}
}
}
func TestServerContextDecodingBase64UserData(t *testing.T) {
base64Sets := []struct {
in string
out bool
}{
{"cloudinit-user-data,foo,bar", true},
{"bar,cloudinit-user-data,foo,bar", true},
{"cloudinit-user-data", true},
{"", false},
{"foo", false},
}
for _, set := range base64Sets {
userdata := map[string]string{"base64_fields": set.in}
if isBase64Encoded("cloudinit-user-data", userdata) != set.out {
t.Errorf("isBase64Encoded(cloudinit-user-data, %s) should be %t", userdata, set.out)
}
}
}