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add cloud-init support for cloudstack
This commit is contained in:
stffabi
118
config/cloudinit/datasource/metadata/cloudstack/metadata.go
Executable file
118
config/cloudinit/datasource/metadata/cloudstack/metadata.go
Executable file
@@ -0,0 +1,118 @@
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// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cloudstack
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import (
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"net"
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"strconv"
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"strings"
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"github.com/rancher/os/netconf"
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"github.com/rancher/os/config/cloudinit/datasource"
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"github.com/rancher/os/config/cloudinit/datasource/metadata"
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"github.com/rancher/os/config/cloudinit/pkg"
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"github.com/rancher/os/log"
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"github.com/vishvananda/netlink"
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)
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const (
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apiVersion = "latest/"
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userdataPath = apiVersion + "user-data"
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metadataPath = apiVersion + "meta-data/"
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serverIdentifier = "dhcp_server_identifier"
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)
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type MetadataService struct {
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metadata.Service
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}
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func NewDatasource(root string) []*MetadataService {
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roots := make([]string, 0, 5)
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if root == "" {
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if links, err := netlink.LinkList(); err == nil {
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log.Infof("Checking to see if a cloudstack server-identifier is available")
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for _, link := range links {
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linkName := link.Attrs().Name
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if linkName == "lo" {
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continue
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}
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log.Infof("searching for cloudstack server %s on %s", serverIdentifier, linkName)
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lease := netconf.GetDhcpLease(linkName)
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if server, ok := lease[serverIdentifier]; ok {
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log.Infof("found cloudstack server '%s'", server)
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server = "http://" + server + "/"
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roots = append(roots, server)
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}
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}
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} else {
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log.Errorf("error getting LinkList: %s", err)
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}
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} else {
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roots = append(roots, root)
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}
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sources := make([]*MetadataService, 0, len(roots))
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for _, server := range roots {
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datasource := metadata.NewDatasourceWithCheckPath(server, apiVersion, metadataPath, userdataPath, metadataPath, nil)
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sources = append(sources, &MetadataService{datasource})
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}
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return sources
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}
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func (ms MetadataService) AvailabilityChanges() bool {
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// TODO: if it can't find the network, maybe we can start it?
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return false
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}
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func (ms MetadataService) FetchMetadata() (datasource.Metadata, error) {
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metadata := datasource.Metadata{}
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if sshKeys, err := ms.FetchAttributes("public-keys"); err == nil {
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metadata.SSHPublicKeys = map[string]string{}
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for i, sshkey := range sshKeys {
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log.Printf("Found SSH key %d", i)
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metadata.SSHPublicKeys[strconv.Itoa(i)] = sshkey
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}
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} else if _, ok := err.(pkg.ErrNotFound); !ok {
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return metadata, err
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}
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if hostname, err := ms.FetchAttribute("local-hostname"); err == nil {
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metadata.Hostname = strings.Split(hostname, " ")[0]
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} else if _, ok := err.(pkg.ErrNotFound); !ok {
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return metadata, err
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}
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if localAddr, err := ms.FetchAttribute("local-ipv4"); err == nil {
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metadata.PrivateIPv4 = net.ParseIP(localAddr)
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} else if _, ok := err.(pkg.ErrNotFound); !ok {
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return metadata, err
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}
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if publicAddr, err := ms.FetchAttribute("public-ipv4"); err == nil {
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metadata.PublicIPv4 = net.ParseIP(publicAddr)
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} else if _, ok := err.(pkg.ErrNotFound); !ok {
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return metadata, err
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}
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return metadata, nil
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}
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func (ms MetadataService) Type() string {
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return "cloudstack-metadata-service"
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}
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102
config/cloudinit/datasource/metadata/cloudstack/metadata_test.go
Executable file
102
config/cloudinit/datasource/metadata/cloudstack/metadata_test.go
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@@ -0,0 +1,102 @@
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// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cloudstack
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import (
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"fmt"
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"net"
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"reflect"
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"testing"
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"github.com/rancher/os/config/cloudinit/datasource"
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"github.com/rancher/os/config/cloudinit/datasource/metadata"
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"github.com/rancher/os/config/cloudinit/datasource/metadata/test"
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"github.com/rancher/os/config/cloudinit/pkg"
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)
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func TestType(t *testing.T) {
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want := "cloudstack-metadata-service"
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if kind := (MetadataService{}).Type(); kind != want {
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t.Fatalf("bad type: want %q, got %q", want, kind)
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}
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}
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func TestFetchMetadata(t *testing.T) {
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for _, tt := range []struct {
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root string
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metadataPath string
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resources map[string]string
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expect datasource.Metadata
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clientErr error
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expectErr error
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}{
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{
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root: "/",
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metadataPath: "latest/meta-data/",
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resources: map[string]string{
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"/latest/meta-data/local-hostname": "host",
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"/latest/meta-data/local-ipv4": "1.2.3.4",
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"/latest/meta-data/public-ipv4": "5.6.7.8",
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"/latest/meta-data/public-keys": "key\n",
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},
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expect: datasource.Metadata{
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Hostname: "host",
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PrivateIPv4: net.ParseIP("1.2.3.4"),
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PublicIPv4: net.ParseIP("5.6.7.8"),
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SSHPublicKeys: map[string]string{"0": "key"},
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},
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},
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{
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root: "/",
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metadataPath: "latest/meta-data/",
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resources: map[string]string{
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"/latest/meta-data/local-hostname": "host domain another_domain",
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"/latest/meta-data/local-ipv4": "21.2.3.4",
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"/latest/meta-data/public-ipv4": "25.6.7.8",
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"/latest/meta-data/public-keys": "key\n",
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},
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expect: datasource.Metadata{
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Hostname: "host",
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PrivateIPv4: net.ParseIP("21.2.3.4"),
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PublicIPv4: net.ParseIP("25.6.7.8"),
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SSHPublicKeys: map[string]string{"0": "key"},
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},
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},
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{
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clientErr: pkg.ErrTimeout{Err: fmt.Errorf("test error")},
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expectErr: pkg.ErrTimeout{Err: fmt.Errorf("test error")},
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},
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} {
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service := &MetadataService{metadata.Service{
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Root: tt.root,
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Client: &test.HTTPClient{Resources: tt.resources, Err: tt.clientErr},
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MetadataPath: tt.metadataPath,
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}}
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metadata, err := service.FetchMetadata()
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if Error(err) != Error(tt.expectErr) {
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t.Fatalf("bad error (%q): \nwant %q, \ngot %q\n", tt.resources, tt.expectErr, err)
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}
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if !reflect.DeepEqual(tt.expect, metadata) {
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t.Fatalf("bad fetch (%q): \nwant %#v, \ngot %#v\n", tt.resources, tt.expect, metadata)
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}
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}
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}
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func Error(err error) string {
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if err != nil {
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return err.Error()
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}
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return ""
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}
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