-
Notifications
You must be signed in to change notification settings - Fork 4.6k
/
gce_cloud.go
372 lines (304 loc) · 10.7 KB
/
gce_cloud.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
/*
Copyright 2019 The Kubernetes Authors.
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 (
"bytes"
"fmt"
"net/http"
"os"
"os/exec"
"strings"
"golang.org/x/net/context"
"golang.org/x/oauth2/google"
compute "google.golang.org/api/compute/v0.beta"
"google.golang.org/api/iam/v1"
oauth2 "google.golang.org/api/oauth2/v2"
"google.golang.org/api/storage/v1"
"k8s.io/klog"
"k8s.io/kops/dnsprovider/pkg/dnsprovider"
"k8s.io/kops/dnsprovider/pkg/dnsprovider/providers/google/clouddns"
"k8s.io/kops/pkg/apis/kops"
"k8s.io/kops/upup/pkg/fi"
)
type GCECloud interface {
fi.Cloud
Compute() *compute.Service
Storage() *storage.Service
IAM() *iam.Service
Region() string
Project() string
WaitForOp(op *compute.Operation) error
GetApiIngressStatus(cluster *kops.Cluster) ([]kops.ApiIngressStatus, error)
Labels() map[string]string
// FindClusterStatus gets the status of the cluster as it exists in GCE, inferred from volumes
FindClusterStatus(cluster *kops.Cluster) (*kops.ClusterStatus, error)
Zones() ([]string, error)
// ServiceAccount returns the email for the service account that the instances will run under
ServiceAccount() (string, error)
}
type gceCloudImplementation struct {
compute *compute.Service
storage *storage.Service
iam *iam.Service
region string
project string
// projectInfo caches the project info from the compute API
projectInfo *compute.Project
labels map[string]string
}
var _ fi.Cloud = &gceCloudImplementation{}
func (c *gceCloudImplementation) ProviderID() kops.CloudProviderID {
return kops.CloudProviderGCE
}
var gceCloudInstances map[string]GCECloud = make(map[string]GCECloud)
// DefaultProject returns the current project configured in the gcloud SDK, ("", nil) if no project was set
func DefaultProject() (string, error) {
// The default project isn't usually defined by the google cloud APIs,
// for example the Application Default Credential won't have ProjectID set.
// If we're running on a GCP instance, we can get it from the metadata service,
// but the normal kops CLI usage is running locally with gcloud configuration with a project,
// so we use that value.
cmd := exec.Command("gcloud", "config", "get-value", "project")
env := os.Environ()
cmd.Env = env
var stdout bytes.Buffer
cmd.Stdout = &stdout
var stderr bytes.Buffer
cmd.Stderr = &stderr
human := strings.Join(cmd.Args, " ")
klog.V(2).Infof("Running command: %s", human)
err := cmd.Run()
if err != nil {
klog.Infof("error running %s", human)
klog.Info(stdout.String())
klog.Info(stderr.String())
return "", fmt.Errorf("error running %s: %v", human, err)
}
projectID := strings.TrimSpace(stdout.String())
return projectID, err
}
func NewGCECloud(region string, project string, labels map[string]string) (GCECloud, error) {
i := gceCloudInstances[region+"::"+project]
if i != nil {
return i.(gceCloudInternal).WithLabels(labels), nil
}
c := &gceCloudImplementation{region: region, project: project}
ctx := context.Background()
if os.Getenv("GOOGLE_APPLICATION_CREDENTIALS") != "" {
klog.Infof("Will load GOOGLE_APPLICATION_CREDENTIALS from %s", os.Getenv("GOOGLE_APPLICATION_CREDENTIALS"))
}
// TODO: should we create different clients with per-service scopes?
client, err := google.DefaultClient(ctx, compute.CloudPlatformScope)
if err != nil {
return nil, fmt.Errorf("error building google API client: %v", err)
}
computeService, err := compute.New(client)
if err != nil {
return nil, fmt.Errorf("error building compute API client: %v", err)
}
c.compute = computeService
storageService, err := storage.New(client)
if err != nil {
return nil, fmt.Errorf("error building storage API client: %v", err)
}
c.storage = storageService
iamService, err := iam.New(client)
if err != nil {
return nil, fmt.Errorf("error building IAM API client: %v", err)
}
c.iam = iamService
gceCloudInstances[region+"::"+project] = c
{
// Attempt to log the current GCE service account in user, for diagnostic purposes
// At least until we get e2e running, we're doing this always
tokenInfo, err := c.getTokenInfo(client)
if err != nil {
klog.Infof("unable to get token info: %v", err)
} else {
klog.V(2).Infof("running with GCE credentials: email=%s, scope=%s", tokenInfo.Email, tokenInfo.Scope)
}
}
return c.WithLabels(labels), nil
}
// gceCloudInternal is an interface for private functions for a gceCloudImplemention or mockGCECloud
type gceCloudInternal interface {
// WithLabels returns a copy of the GCECloud, bound to the specified labels
WithLabels(labels map[string]string) GCECloud
}
// WithLabels returns a copy of the GCECloud, bound to the specified labels
func (c *gceCloudImplementation) WithLabels(labels map[string]string) GCECloud {
i := &gceCloudImplementation{}
*i = *c
i.labels = labels
return i
}
// Compute returns private struct element compute.
func (c *gceCloudImplementation) Compute() *compute.Service {
return c.compute
}
// Storage returns private struct element storage.
func (c *gceCloudImplementation) Storage() *storage.Service {
return c.storage
}
// IAM returns the IAM client
func (c *gceCloudImplementation) IAM() *iam.Service {
return c.iam
}
// Region returns private struct element region.
func (c *gceCloudImplementation) Region() string {
return c.region
}
// Project returns private struct element project.
func (c *gceCloudImplementation) Project() string {
return c.project
}
// ServiceAccount returns the email address for the service account that the instances will run under.
func (c *gceCloudImplementation) ServiceAccount() (string, error) {
if c.projectInfo == nil {
// Find the project info from the compute API, which includes the default service account
klog.V(2).Infof("fetching project %q from compute API", c.project)
p, err := c.compute.Projects.Get(c.project).Do()
if err != nil {
return "", fmt.Errorf("error fetching info for project %q: %v", c.project, err)
}
c.projectInfo = p
}
if c.projectInfo.DefaultServiceAccount == "" {
return "", fmt.Errorf("compute project %q did not have DefaultServiceAccount", c.project)
}
return c.projectInfo.DefaultServiceAccount, nil
}
func (c *gceCloudImplementation) DNS() (dnsprovider.Interface, error) {
provider, err := clouddns.CreateInterface(c.project, nil)
if err != nil {
return nil, fmt.Errorf("Error building (k8s) DNS provider: %v", err)
}
return provider, nil
}
func (c *gceCloudImplementation) FindVPCInfo(id string) (*fi.VPCInfo, error) {
klog.Warningf("FindVPCInfo not (yet) implemented on GCE")
return nil, nil
}
func (c *gceCloudImplementation) Labels() map[string]string {
// Defensive copy
tags := make(map[string]string)
for k, v := range c.labels {
tags[k] = v
}
return tags
}
// TODO refactor this out of resources
// this is needed for delete groups and other new methods
// Zones returns the zones in a region
func (c *gceCloudImplementation) Zones() ([]string, error) {
var zones []string
// TODO: Only zones in api.Cluster object, if we have one?
gceZones, err := c.Compute().Zones.List(c.Project()).Do()
if err != nil {
return nil, fmt.Errorf("error listing zones: %v", err)
}
for _, gceZone := range gceZones.Items {
u, err := ParseGoogleCloudURL(gceZone.Region)
if err != nil {
return nil, err
}
if u.Name != c.Region() {
continue
}
zones = append(zones, gceZone.Name)
}
if len(zones) == 0 {
return nil, fmt.Errorf("unable to determine zones in region %q", c.Region())
}
klog.Infof("Scanning zones: %v", zones)
return zones, nil
}
func (c *gceCloudImplementation) WaitForOp(op *compute.Operation) error {
return WaitForOp(c.compute, op)
}
func (c *gceCloudImplementation) GetApiIngressStatus(cluster *kops.Cluster) ([]kops.ApiIngressStatus, error) {
var ingresses []kops.ApiIngressStatus
// Note that this must match GCEModelContext::NameForForwardingRule
name := SafeObjectName("api", cluster.ObjectMeta.Name)
klog.V(2).Infof("Querying GCE to find ForwardingRules for API (%q)", name)
forwardingRule, err := c.compute.ForwardingRules.Get(c.project, c.region, name).Do()
if err != nil {
if !IsNotFound(err) {
forwardingRule = nil
} else {
return nil, fmt.Errorf("error getting ForwardingRule %q: %v", name, err)
}
}
if forwardingRule != nil {
if forwardingRule.IPAddress == "" {
return nil, fmt.Errorf("Found forward rule %q, but it did not have an IPAddress", name)
}
ingresses = append(ingresses, kops.ApiIngressStatus{
IP: forwardingRule.IPAddress,
})
}
return ingresses, nil
}
// FindInstanceTemplates finds all instance templates that are associated with the current cluster
// It matches them by looking for instance metadata with key='cluster-name' and value of our cluster name
func FindInstanceTemplates(c GCECloud, clusterName string) ([]*compute.InstanceTemplate, error) {
findClusterName := strings.TrimSpace(clusterName)
var matches []*compute.InstanceTemplate
ctx := context.Background()
err := c.Compute().InstanceTemplates.List(c.Project()).Pages(ctx, func(page *compute.InstanceTemplateList) error {
for _, t := range page.Items {
match := false
for _, item := range t.Properties.Metadata.Items {
if item.Key == "cluster-name" {
value := fi.StringValue(item.Value)
if strings.TrimSpace(value) == findClusterName {
match = true
} else {
match = false
break
}
}
}
if !match {
continue
}
matches = append(matches, t)
}
return nil
})
if err != nil {
return nil, fmt.Errorf("error listing instance templates: %v", err)
}
return matches, nil
}
// logTokenInfo returns information about the active credential
func (c *gceCloudImplementation) getTokenInfo(client *http.Client) (*oauth2.Tokeninfo, error) {
tokenSource, err := google.DefaultTokenSource(context.TODO(), compute.CloudPlatformScope)
if err != nil {
return nil, fmt.Errorf("error building token source: %v", err)
}
token, err := tokenSource.Token()
if err != nil {
return nil, fmt.Errorf("error getting token: %v", err)
}
// Note: do not log token or any portion of it
service, err := oauth2.New(client)
if err != nil {
return nil, fmt.Errorf("error creating oauth2 service client: %v", err)
}
tokenInfo, err := service.Tokeninfo().AccessToken(token.AccessToken).Do()
if err != nil {
return nil, fmt.Errorf("error fetching oauth2 token info: %v", err)
}
return tokenInfo, nil
}