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Merge pull request #426 from crawford/gce
datasource/gce: add initial support
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| // Copyright 2016 CoreOS, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package gce | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net" | ||
| "net/http" | ||
|
|
||
| "github.com/coreos/coreos-cloudinit/datasource" | ||
| "github.com/coreos/coreos-cloudinit/datasource/metadata" | ||
| ) | ||
|
|
||
| const ( | ||
| apiVersion = "computeMetadata/v1/" | ||
| metadataPath = apiVersion + "instance/" | ||
| userdataPath = apiVersion + "instance/attributes/user-data" | ||
| ) | ||
|
|
||
| type metadataService struct { | ||
| metadata.MetadataService | ||
| } | ||
|
|
||
| func NewDatasource(root string) *metadataService { | ||
| return &metadataService{metadata.NewDatasource(root, apiVersion, userdataPath, metadataPath, http.Header{"Metadata-Flavor": {"Google"}})} | ||
| } | ||
|
|
||
| func (ms metadataService) FetchMetadata() (datasource.Metadata, error) { | ||
| public, err := ms.fetchIP("network-interfaces/0/access-configs/0/external-ip") | ||
| if err != nil { | ||
| return datasource.Metadata{}, err | ||
| } | ||
| local, err := ms.fetchIP("network-interfaces/0/ip") | ||
| if err != nil { | ||
| return datasource.Metadata{}, err | ||
| } | ||
| hostname, err := ms.fetchString("hostname") | ||
| if err != nil { | ||
| return datasource.Metadata{}, err | ||
| } | ||
|
|
||
| return datasource.Metadata{ | ||
| PublicIPv4: public, | ||
| PrivateIPv4: local, | ||
| Hostname: hostname, | ||
| }, nil | ||
| } | ||
|
|
||
| func (ms metadataService) Type() string { | ||
| return "gce-metadata-service" | ||
| } | ||
|
|
||
| func (ms metadataService) fetchString(key string) (string, error) { | ||
| data, err := ms.FetchData(ms.MetadataUrl() + key) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| return string(data), nil | ||
| } | ||
|
|
||
| func (ms metadataService) fetchIP(key string) (net.IP, error) { | ||
| str, err := ms.fetchString(key) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if str == "" { | ||
| return nil, nil | ||
| } | ||
|
|
||
| if ip := net.ParseIP(str); ip != nil { | ||
| return ip, nil | ||
| } else { | ||
| return nil, fmt.Errorf("couldn't parse %q as IP address", str) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| // Copyright 2015 CoreOS, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package gce | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net" | ||
| "reflect" | ||
| "testing" | ||
|
|
||
| "github.com/coreos/coreos-cloudinit/datasource" | ||
| "github.com/coreos/coreos-cloudinit/datasource/metadata" | ||
| "github.com/coreos/coreos-cloudinit/datasource/metadata/test" | ||
| "github.com/coreos/coreos-cloudinit/pkg" | ||
| ) | ||
|
|
||
| func TestType(t *testing.T) { | ||
| want := "gce-metadata-service" | ||
| if kind := (metadataService{}).Type(); kind != want { | ||
| t.Fatalf("bad type: want %q, got %q", want, kind) | ||
| } | ||
| } | ||
|
|
||
| func TestFetchMetadata(t *testing.T) { | ||
| for _, tt := range []struct { | ||
| root string | ||
| metadataPath string | ||
| resources map[string]string | ||
| expect datasource.Metadata | ||
| clientErr error | ||
| expectErr error | ||
| }{ | ||
| { | ||
| root: "/", | ||
| metadataPath: "computeMetadata/v1/instance/", | ||
| resources: map[string]string{}, | ||
| }, | ||
| { | ||
| root: "/", | ||
| metadataPath: "computeMetadata/v1/instance/", | ||
| resources: map[string]string{ | ||
| "/computeMetadata/v1/instance/hostname": "host", | ||
| }, | ||
| expect: datasource.Metadata{ | ||
| Hostname: "host", | ||
| }, | ||
| }, | ||
| { | ||
| root: "/", | ||
| metadataPath: "computeMetadata/v1/instance/", | ||
| resources: map[string]string{ | ||
| "/computeMetadata/v1/instance/hostname": "host", | ||
| "/computeMetadata/v1/instance/network-interfaces/0/ip": "1.2.3.4", | ||
| "/computeMetadata/v1/instance/network-interfaces/0/access-configs/0/external-ip": "5.6.7.8", | ||
| }, | ||
| expect: datasource.Metadata{ | ||
| Hostname: "host", | ||
| PrivateIPv4: net.ParseIP("1.2.3.4"), | ||
| PublicIPv4: net.ParseIP("5.6.7.8"), | ||
| }, | ||
| }, | ||
| { | ||
| clientErr: pkg.ErrTimeout{Err: fmt.Errorf("test error")}, | ||
| expectErr: pkg.ErrTimeout{Err: fmt.Errorf("test error")}, | ||
| }, | ||
| } { | ||
| service := &metadataService{metadata.MetadataService{ | ||
| Root: tt.root, | ||
| Client: &test.HttpClient{Resources: tt.resources, Err: tt.clientErr}, | ||
| MetadataPath: tt.metadataPath, | ||
| }} | ||
| metadata, err := service.FetchMetadata() | ||
| if Error(err) != Error(tt.expectErr) { | ||
| t.Fatalf("bad error (%q): want %q, got %q", tt.resources, tt.expectErr, err) | ||
| } | ||
| if !reflect.DeepEqual(tt.expect, metadata) { | ||
| t.Fatalf("bad fetch (%q): want %#v, got %#v", tt.resources, tt.expect, metadata) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func Error(err error) string { | ||
| if err != nil { | ||
| return err.Error() | ||
| } | ||
| return "" | ||
| } |
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