20188: Handle InsufficientVolumeCapacity as quota error.
[arvados.git] / lib / cloud / cloudtest / tester.go
1 // Copyright (C) The Arvados Authors. All rights reserved.
2 //
3 // SPDX-License-Identifier: AGPL-3.0
4
5 package cloudtest
6
7 import (
8         "crypto/rand"
9         "encoding/json"
10         "errors"
11         "fmt"
12         "time"
13
14         "git.arvados.org/arvados.git/lib/cloud"
15         "git.arvados.org/arvados.git/lib/dispatchcloud/sshexecutor"
16         "git.arvados.org/arvados.git/lib/dispatchcloud/worker"
17         "git.arvados.org/arvados.git/sdk/go/arvados"
18         "github.com/sirupsen/logrus"
19         "golang.org/x/crypto/ssh"
20 )
21
22 var (
23         errTestInstanceNotFound = errors.New("test instance missing from cloud provider's list")
24 )
25
26 // A tester does a sequence of operations to test a cloud driver and
27 // configuration. Run() should be called only once, after assigning
28 // suitable values to public fields.
29 type tester struct {
30         Logger             logrus.FieldLogger
31         Tags               cloud.SharedResourceTags
32         TagKeyPrefix       string
33         SetID              cloud.InstanceSetID
34         DestroyExisting    bool
35         ProbeInterval      time.Duration
36         SyncInterval       time.Duration
37         TimeoutBooting     time.Duration
38         Driver             cloud.Driver
39         DriverParameters   json.RawMessage
40         InstanceType       arvados.InstanceType
41         ImageID            cloud.ImageID
42         SSHKey             ssh.Signer
43         SSHPort            string
44         BootProbeCommand   string
45         ShellCommand       string
46         PauseBeforeDestroy func()
47
48         is              cloud.InstanceSet
49         testInstance    *worker.TagVerifier
50         secret          string
51         executor        *sshexecutor.Executor
52         showedLoginInfo bool
53
54         failed bool
55 }
56
57 // Run the test suite as specified, clean up as needed, and return
58 // true (everything is OK) or false (something went wrong).
59 func (t *tester) Run() bool {
60         // This flag gets set when we encounter a non-fatal error, so
61         // we can continue doing more tests but remember to return
62         // false (failure) at the end.
63         deferredError := false
64
65         var err error
66         t.is, err = t.Driver.InstanceSet(t.DriverParameters, t.SetID, t.Tags, t.Logger)
67         if err != nil {
68                 t.Logger.WithError(err).Info("error initializing driver")
69                 return false
70         }
71
72         for {
73                 // Don't send the driver any filters when getting the
74                 // initial instance list. This way we can log an
75                 // instance count (N=...)  that includes all instances
76                 // in this service account, even if they don't have
77                 // the same InstanceSetID.
78                 insts, err := t.getInstances(nil)
79                 if err != nil {
80                         t.Logger.WithError(err).Info("error getting list of instances")
81                         return false
82                 }
83
84                 foundExisting := false
85                 for _, i := range insts {
86                         if i.Tags()[t.TagKeyPrefix+"InstanceSetID"] != string(t.SetID) {
87                                 continue
88                         }
89                         lgr := t.Logger.WithFields(logrus.Fields{
90                                 "Instance":      i.ID(),
91                                 "InstanceSetID": t.SetID,
92                         })
93                         foundExisting = true
94                         if t.DestroyExisting {
95                                 lgr.Info("destroying existing instance with our InstanceSetID")
96                                 t0 := time.Now()
97                                 err := i.Destroy()
98                                 lgr := lgr.WithField("Duration", time.Since(t0))
99                                 if err != nil {
100                                         lgr.WithError(err).Error("error destroying existing instance")
101                                 } else {
102                                         lgr.Info("Destroy() call succeeded")
103                                 }
104                         } else {
105                                 lgr.Error("found existing instance with our InstanceSetID")
106                         }
107                 }
108                 if !foundExisting {
109                         break
110                 } else if t.DestroyExisting {
111                         t.sleepSyncInterval()
112                 } else {
113                         t.Logger.Error("cannot continue with existing instances -- clean up manually, use -destroy-existing=true, or choose a different -instance-set-id")
114                         return false
115                 }
116         }
117
118         t.secret = randomHex(40)
119
120         tags := cloud.InstanceTags{}
121         for k, v := range t.Tags {
122                 tags[k] = v
123         }
124         tags[t.TagKeyPrefix+"InstanceSetID"] = string(t.SetID)
125         tags[t.TagKeyPrefix+"InstanceSecret"] = t.secret
126
127         defer t.destroyTestInstance()
128
129         bootDeadline := time.Now().Add(t.TimeoutBooting)
130         initCommand := worker.TagVerifier{Instance: nil, Secret: t.secret, ReportVerified: nil}.InitCommand()
131
132         t.Logger.WithFields(logrus.Fields{
133                 "InstanceType":         t.InstanceType.Name,
134                 "ProviderInstanceType": t.InstanceType.ProviderType,
135                 "ImageID":              t.ImageID,
136                 "Tags":                 tags,
137                 "InitCommand":          initCommand,
138         }).Info("creating instance")
139         t0 := time.Now()
140         inst, err := t.is.Create(t.InstanceType, t.ImageID, tags, initCommand, t.SSHKey.PublicKey())
141         lgrC := t.Logger.WithField("Duration", time.Since(t0))
142         if err != nil {
143                 // Create() might have failed due to a bug or network
144                 // error even though the creation was successful, so
145                 // it's safer to wait a bit for an instance to appear.
146                 deferredError = true
147                 lgrC.WithError(err).Error("error creating test instance")
148                 t.Logger.WithField("Deadline", bootDeadline).Info("waiting for instance to appear anyway, in case the Create response was incorrect")
149                 for err = t.refreshTestInstance(); err != nil; err = t.refreshTestInstance() {
150                         if time.Now().After(bootDeadline) {
151                                 t.Logger.Error("timed out")
152                                 return false
153                         }
154                         t.sleepSyncInterval()
155                 }
156                 t.Logger.WithField("Instance", t.testInstance.ID()).Info("new instance appeared")
157                 t.showLoginInfo()
158         } else {
159                 // Create() succeeded. Make sure the new instance
160                 // appears right away in the Instances() list.
161                 lgrC.WithField("Instance", inst.ID()).Info("created instance")
162                 t.testInstance = &worker.TagVerifier{Instance: inst, Secret: t.secret, ReportVerified: nil}
163                 t.showLoginInfo()
164                 err = t.refreshTestInstance()
165                 if err == errTestInstanceNotFound {
166                         t.Logger.WithError(err).Error("cloud/driver Create succeeded, but instance is not in list")
167                         deferredError = true
168                 } else if err != nil {
169                         t.Logger.WithError(err).Error("error getting list of instances")
170                         return false
171                 }
172         }
173
174         if !t.checkTags() {
175                 // checkTags() already logged the errors
176                 deferredError = true
177         }
178
179         if !t.waitForBoot(bootDeadline) {
180                 deferredError = true
181         }
182
183         if t.ShellCommand != "" {
184                 err = t.runShellCommand(t.ShellCommand)
185                 if err != nil {
186                         t.Logger.WithError(err).Error("shell command failed")
187                         deferredError = true
188                 }
189         }
190
191         if fn := t.PauseBeforeDestroy; fn != nil {
192                 t.showLoginInfo()
193                 fn()
194         }
195
196         return !deferredError
197 }
198
199 // If the test instance has an address, log an "ssh user@host" command
200 // line that the operator can paste into another terminal, and set
201 // t.showedLoginInfo.
202 //
203 // If the test instance doesn't have an address yet, do nothing.
204 func (t *tester) showLoginInfo() {
205         t.updateExecutor()
206         host, port := t.executor.TargetHostPort()
207         if host == "" {
208                 return
209         }
210         user := t.testInstance.RemoteUser()
211         t.Logger.WithField("Command", fmt.Sprintf("ssh -p%s %s@%s", port, user, host)).Info("showing login information")
212         t.showedLoginInfo = true
213 }
214
215 // Get the latest instance list from the driver. If our test instance
216 // is found, assign it to t.testIntance.
217 func (t *tester) refreshTestInstance() error {
218         insts, err := t.getInstances(cloud.InstanceTags{t.TagKeyPrefix + "InstanceSetID": string(t.SetID)})
219         if err != nil {
220                 return err
221         }
222         for _, i := range insts {
223                 if t.testInstance == nil {
224                         // Filter by InstanceSetID tag value
225                         if i.Tags()[t.TagKeyPrefix+"InstanceSetID"] != string(t.SetID) {
226                                 continue
227                         }
228                 } else {
229                         // Filter by instance ID
230                         if i.ID() != t.testInstance.ID() {
231                                 continue
232                         }
233                 }
234                 t.Logger.WithFields(logrus.Fields{
235                         "Instance": i.ID(),
236                         "Address":  i.Address(),
237                 }).Info("found our instance in returned list")
238                 t.testInstance = &worker.TagVerifier{Instance: i, Secret: t.secret, ReportVerified: nil}
239                 if !t.showedLoginInfo {
240                         t.showLoginInfo()
241                 }
242                 return nil
243         }
244         return errTestInstanceNotFound
245 }
246
247 // Get the list of instances, passing the given tags to the cloud
248 // driver to filter results.
249 //
250 // Return only the instances that have our InstanceSetID tag.
251 func (t *tester) getInstances(tags cloud.InstanceTags) ([]cloud.Instance, error) {
252         var ret []cloud.Instance
253         t.Logger.WithField("FilterTags", tags).Info("getting instance list")
254         t0 := time.Now()
255         insts, err := t.is.Instances(tags)
256         if err != nil {
257                 return nil, err
258         }
259         t.Logger.WithFields(logrus.Fields{
260                 "Duration": time.Since(t0),
261                 "N":        len(insts),
262         }).Info("got instance list")
263         for _, i := range insts {
264                 if i.Tags()[t.TagKeyPrefix+"InstanceSetID"] == string(t.SetID) {
265                         ret = append(ret, i)
266                 }
267         }
268         return ret, nil
269 }
270
271 // Check that t.testInstance has every tag in t.Tags. If not, log an
272 // error and return false.
273 func (t *tester) checkTags() bool {
274         ok := true
275         for k, v := range t.Tags {
276                 if got := t.testInstance.Tags()[k]; got != v {
277                         ok = false
278                         t.Logger.WithFields(logrus.Fields{
279                                 "Key":           k,
280                                 "ExpectedValue": v,
281                                 "GotValue":      got,
282                         }).Error("tag is missing from test instance")
283                 }
284         }
285         if ok {
286                 t.Logger.Info("all expected tags are present")
287         }
288         return ok
289 }
290
291 // Run t.BootProbeCommand on t.testInstance until it succeeds or the
292 // deadline arrives.
293 func (t *tester) waitForBoot(deadline time.Time) bool {
294         for time.Now().Before(deadline) {
295                 err := t.runShellCommand(t.BootProbeCommand)
296                 if err == nil {
297                         return true
298                 }
299                 t.sleepProbeInterval()
300                 t.refreshTestInstance()
301         }
302         t.Logger.Error("timed out")
303         return false
304 }
305
306 // Create t.executor and/or update its target to t.testInstance's
307 // current address.
308 func (t *tester) updateExecutor() {
309         if t.executor == nil {
310                 t.executor = sshexecutor.New(t.testInstance)
311                 t.executor.SetTargetPort(t.SSHPort)
312                 t.executor.SetSigners(t.SSHKey)
313         } else {
314                 t.executor.SetTarget(t.testInstance)
315         }
316 }
317
318 func (t *tester) runShellCommand(cmd string) error {
319         t.updateExecutor()
320         t.Logger.WithFields(logrus.Fields{
321                 "Command": cmd,
322         }).Info("executing remote command")
323         t0 := time.Now()
324         stdout, stderr, err := t.executor.Execute(nil, cmd, nil)
325         lgr := t.Logger.WithFields(logrus.Fields{
326                 "Duration": time.Since(t0),
327                 "Command":  cmd,
328                 "stdout":   string(stdout),
329                 "stderr":   string(stderr),
330         })
331         if err != nil {
332                 lgr.WithError(err).Info("remote command failed")
333         } else {
334                 lgr.Info("remote command succeeded")
335         }
336         return err
337 }
338
339 // currently, this tries forever until it can return true (success).
340 func (t *tester) destroyTestInstance() bool {
341         if t.testInstance == nil {
342                 return true
343         }
344         for {
345                 lgr := t.Logger.WithField("Instance", t.testInstance.ID())
346                 lgr.Info("destroying instance")
347                 t0 := time.Now()
348
349                 err := t.testInstance.Destroy()
350                 lgrDur := lgr.WithField("Duration", time.Since(t0))
351                 if err != nil {
352                         lgrDur.WithError(err).Error("error destroying instance")
353                 } else {
354                         lgrDur.Info("destroyed instance")
355                 }
356
357                 err = t.refreshTestInstance()
358                 if err == errTestInstanceNotFound {
359                         lgr.Info("instance no longer appears in list")
360                         t.testInstance = nil
361                         return true
362                 } else if err == nil {
363                         lgr.Info("instance still exists after calling Destroy")
364                         t.sleepSyncInterval()
365                         continue
366                 } else {
367                         t.Logger.WithError(err).Error("error getting list of instances")
368                         continue
369                 }
370         }
371 }
372
373 func (t *tester) sleepSyncInterval() {
374         t.Logger.WithField("Duration", t.SyncInterval).Info("waiting SyncInterval")
375         time.Sleep(t.SyncInterval)
376 }
377
378 func (t *tester) sleepProbeInterval() {
379         t.Logger.WithField("Duration", t.ProbeInterval).Info("waiting ProbeInterval")
380         time.Sleep(t.ProbeInterval)
381 }
382
383 // Return a random string of n hexadecimal digits (n*4 random bits). n
384 // must be even.
385 func randomHex(n int) string {
386         buf := make([]byte, n/2)
387         _, err := rand.Read(buf)
388         if err != nil {
389                 panic(err)
390         }
391         return fmt.Sprintf("%x", buf)
392 }