-
Notifications
You must be signed in to change notification settings - Fork 1.2k
/
logadmin.go
404 lines (364 loc) · 12.8 KB
/
logadmin.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
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
// Copyright 2016 Google Inc. All Rights Reserved.
//
// 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.
// These features are missing now, but will likely be added:
// - There is no way to specify CallOptions.
// Package logadmin contains a Stackdriver Logging client that can be used
// for reading logs and working with sinks, metrics and monitored resources.
// For a client that can write logs, see package cloud.google.com/go/logging.
//
// The client uses Logging API v2.
// See https://cloud.google.com/logging/docs/api/v2/ for an introduction to the API.
//
// Note: This package is in beta. Some backwards-incompatible changes may occur.
package logadmin // import "cloud.google.com/go/logging/logadmin"
import (
"errors"
"fmt"
"math"
"net/http"
"net/url"
"strings"
"time"
"cloud.google.com/go/internal/version"
"cloud.google.com/go/logging"
vkit "cloud.google.com/go/logging/apiv2"
"cloud.google.com/go/logging/internal"
"github.com/golang/protobuf/ptypes"
gax "github.com/googleapis/gax-go"
"golang.org/x/net/context"
"google.golang.org/api/iterator"
"google.golang.org/api/option"
logtypepb "google.golang.org/genproto/googleapis/logging/type"
logpb "google.golang.org/genproto/googleapis/logging/v2"
"google.golang.org/grpc/codes"
// Import the following so EntryIterator can unmarshal log protos.
_ "google.golang.org/genproto/googleapis/appengine/logging/v1"
_ "google.golang.org/genproto/googleapis/cloud/audit"
)
// Client is a Logging client. A Client is associated with a single Cloud project.
type Client struct {
lClient *vkit.Client // logging client
sClient *vkit.ConfigClient // sink client
mClient *vkit.MetricsClient // metric client
projectID string
closed bool
}
// NewClient returns a new logging client associated with the provided project ID.
//
// By default NewClient uses AdminScope. To use a different scope, call
// NewClient using a WithScopes option (see https://godoc.org/google.golang.org/api/option#WithScopes).
func NewClient(ctx context.Context, projectID string, opts ...option.ClientOption) (*Client, error) {
// Check for '/' in project ID to reserve the ability to support various owning resources,
// in the form "{Collection}/{Name}", for instance "organizations/my-org".
if strings.ContainsRune(projectID, '/') {
return nil, errors.New("logging: project ID contains '/'")
}
opts = append([]option.ClientOption{
option.WithEndpoint(internal.ProdAddr),
option.WithScopes(logging.AdminScope),
}, opts...)
lc, err := vkit.NewClient(ctx, opts...)
if err != nil {
return nil, err
}
// TODO(jba): pass along any client options that should be provided to all clients.
sc, err := vkit.NewConfigClient(ctx, option.WithGRPCConn(lc.Connection()))
if err != nil {
return nil, err
}
mc, err := vkit.NewMetricsClient(ctx, option.WithGRPCConn(lc.Connection()))
if err != nil {
return nil, err
}
// Retry some non-idempotent methods on INTERNAL, because it happens sometimes
// and in all observed cases the operation did not complete.
retryerOnInternal := func() gax.Retryer {
return gax.OnCodes([]codes.Code{
codes.Internal,
}, gax.Backoff{
Initial: 100 * time.Millisecond,
Max: 1000 * time.Millisecond,
Multiplier: 1.2,
})
}
mc.CallOptions.CreateLogMetric = []gax.CallOption{gax.WithRetry(retryerOnInternal)}
mc.CallOptions.UpdateLogMetric = []gax.CallOption{gax.WithRetry(retryerOnInternal)}
lc.SetGoogleClientInfo("gccl", version.Repo)
sc.SetGoogleClientInfo("gccl", version.Repo)
mc.SetGoogleClientInfo("gccl", version.Repo)
client := &Client{
lClient: lc,
sClient: sc,
mClient: mc,
projectID: projectID,
}
return client, nil
}
// parent returns the string used in many RPCs to denote the parent resource of the log.
func (c *Client) parent() string {
return "projects/" + c.projectID
}
// Close closes the client.
func (c *Client) Close() error {
if c.closed {
return nil
}
// Return only the first error. Since all clients share an underlying connection,
// Closes after the first always report a "connection is closing" error.
err := c.lClient.Close()
_ = c.sClient.Close()
_ = c.mClient.Close()
c.closed = true
return err
}
// DeleteLog deletes a log and all its log entries. The log will reappear if it receives new entries.
// logID identifies the log within the project. An example log ID is "syslog". Requires AdminScope.
func (c *Client) DeleteLog(ctx context.Context, logID string) error {
return c.lClient.DeleteLog(ctx, &logpb.DeleteLogRequest{
LogName: internal.LogPath(c.parent(), logID),
})
}
func toHTTPRequest(p *logtypepb.HttpRequest) (*logging.HTTPRequest, error) {
if p == nil {
return nil, nil
}
u, err := url.Parse(p.RequestUrl)
if err != nil {
return nil, err
}
var dur time.Duration
if p.Latency != nil {
dur, err = ptypes.Duration(p.Latency)
if err != nil {
return nil, err
}
}
hr := &http.Request{
Method: p.RequestMethod,
URL: u,
Header: map[string][]string{},
}
if p.UserAgent != "" {
hr.Header.Set("User-Agent", p.UserAgent)
}
if p.Referer != "" {
hr.Header.Set("Referer", p.Referer)
}
return &logging.HTTPRequest{
Request: hr,
RequestSize: p.RequestSize,
Status: int(p.Status),
ResponseSize: p.ResponseSize,
Latency: dur,
RemoteIP: p.RemoteIp,
CacheHit: p.CacheHit,
CacheValidatedWithOriginServer: p.CacheValidatedWithOriginServer,
}, nil
}
// An EntriesOption is an option for listing log entries.
type EntriesOption interface {
set(*logpb.ListLogEntriesRequest)
}
// ProjectIDs sets the project IDs or project numbers from which to retrieve
// log entries. Examples of a project ID: "my-project-1A", "1234567890".
func ProjectIDs(pids []string) EntriesOption { return projectIDs(pids) }
type projectIDs []string
func (p projectIDs) set(r *logpb.ListLogEntriesRequest) {
r.ResourceNames = make([]string, len(p))
for i, v := range p {
r.ResourceNames[i] = fmt.Sprintf("projects/%s", v)
}
}
// Filter sets an advanced logs filter for listing log entries (see
// https://cloud.google.com/logging/docs/view/advanced_filters). The filter is
// compared against all log entries in the projects specified by ProjectIDs.
// Only entries that match the filter are retrieved. An empty filter (the
// default) matches all log entries.
//
// In the filter string, log names must be written in their full form, as
// "projects/PROJECT-ID/logs/LOG-ID". Forward slashes in LOG-ID must be
// replaced by %2F before calling Filter.
//
// Timestamps in the filter string must be written in RFC 3339 format. See the
// timestamp example.
func Filter(f string) EntriesOption { return filter(f) }
type filter string
func (f filter) set(r *logpb.ListLogEntriesRequest) { r.Filter = string(f) }
// NewestFirst causes log entries to be listed from most recent (newest) to
// least recent (oldest). By default, they are listed from oldest to newest.
func NewestFirst() EntriesOption { return newestFirst{} }
type newestFirst struct{}
func (newestFirst) set(r *logpb.ListLogEntriesRequest) { r.OrderBy = "timestamp desc" }
// Entries returns an EntryIterator for iterating over log entries. By default,
// the log entries will be restricted to those from the project passed to
// NewClient. This may be overridden by passing a ProjectIDs option. Requires ReadScope or AdminScope.
func (c *Client) Entries(ctx context.Context, opts ...EntriesOption) *EntryIterator {
it := &EntryIterator{
it: c.lClient.ListLogEntries(ctx, listLogEntriesRequest(c.projectID, opts)),
}
it.pageInfo, it.nextFunc = iterator.NewPageInfo(
it.fetch,
func() int { return len(it.items) },
func() interface{} { b := it.items; it.items = nil; return b })
return it
}
func listLogEntriesRequest(projectID string, opts []EntriesOption) *logpb.ListLogEntriesRequest {
req := &logpb.ListLogEntriesRequest{
ResourceNames: []string{"projects/" + projectID},
}
for _, opt := range opts {
opt.set(req)
}
return req
}
// An EntryIterator iterates over log entries.
type EntryIterator struct {
it *vkit.LogEntryIterator
pageInfo *iterator.PageInfo
nextFunc func() error
items []*logging.Entry
}
// PageInfo supports pagination. See https://godoc.org/google.golang.org/api/iterator package for details.
func (it *EntryIterator) PageInfo() *iterator.PageInfo { return it.pageInfo }
// Next returns the next result. Its second return value is iterator.Done
// (https://godoc.org/google.golang.org/api/iterator) if there are no more
// results. Once Next returns Done, all subsequent calls will return Done.
func (it *EntryIterator) Next() (*logging.Entry, error) {
if err := it.nextFunc(); err != nil {
return nil, err
}
item := it.items[0]
it.items = it.items[1:]
return item, nil
}
func (it *EntryIterator) fetch(pageSize int, pageToken string) (string, error) {
return iterFetch(pageSize, pageToken, it.it.PageInfo(), func() error {
item, err := it.it.Next()
if err != nil {
return err
}
e, err := fromLogEntry(item)
if err != nil {
return err
}
it.items = append(it.items, e)
return nil
})
}
func trunc32(i int) int32 {
if i > math.MaxInt32 {
i = math.MaxInt32
}
return int32(i)
}
var slashUnescaper = strings.NewReplacer("%2F", "/", "%2f", "/")
func fromLogEntry(le *logpb.LogEntry) (*logging.Entry, error) {
time, err := ptypes.Timestamp(le.Timestamp)
if err != nil {
return nil, err
}
var payload interface{}
switch x := le.Payload.(type) {
case *logpb.LogEntry_TextPayload:
payload = x.TextPayload
case *logpb.LogEntry_ProtoPayload:
var d ptypes.DynamicAny
if err := ptypes.UnmarshalAny(x.ProtoPayload, &d); err != nil {
return nil, fmt.Errorf("logging: unmarshalling proto payload: %v", err)
}
payload = d.Message
case *logpb.LogEntry_JsonPayload:
// Leave this as a Struct.
// TODO(jba): convert to map[string]interface{}?
payload = x.JsonPayload
default:
return nil, fmt.Errorf("logging: unknown payload type: %T", le.Payload)
}
hr, err := toHTTPRequest(le.HttpRequest)
if err != nil {
return nil, err
}
return &logging.Entry{
Timestamp: time,
Severity: logging.Severity(le.Severity),
Payload: payload,
Labels: le.Labels,
InsertID: le.InsertId,
HTTPRequest: hr,
Operation: le.Operation,
LogName: slashUnescaper.Replace(le.LogName),
Resource: le.Resource,
Trace: le.Trace,
}, nil
}
// Logs lists the logs owned by the parent resource of the client.
func (c *Client) Logs(ctx context.Context) *LogIterator {
it := &LogIterator{
parentResource: c.parent(),
it: c.lClient.ListLogs(ctx, &logpb.ListLogsRequest{Parent: c.parent()}),
}
it.pageInfo, it.nextFunc = iterator.NewPageInfo(
it.fetch,
func() int { return len(it.items) },
func() interface{} { b := it.items; it.items = nil; return b })
return it
}
// A LogIterator iterates over logs.
type LogIterator struct {
parentResource string
it *vkit.StringIterator
pageInfo *iterator.PageInfo
nextFunc func() error
items []string
}
// PageInfo supports pagination. See https://godoc.org/google.golang.org/api/iterator package for details.
func (it *LogIterator) PageInfo() *iterator.PageInfo { return it.pageInfo }
// Next returns the next result. Its second return value is iterator.Done
// (https://godoc.org/google.golang.org/api/iterator) if there are no more
// results. Once Next returns Done, all subsequent calls will return Done.
func (it *LogIterator) Next() (string, error) {
if err := it.nextFunc(); err != nil {
return "", err
}
item := it.items[0]
it.items = it.items[1:]
return item, nil
}
func (it *LogIterator) fetch(pageSize int, pageToken string) (string, error) {
return iterFetch(pageSize, pageToken, it.it.PageInfo(), func() error {
logPath, err := it.it.Next()
if err != nil {
return err
}
logID := internal.LogIDFromPath(it.parentResource, logPath)
it.items = append(it.items, logID)
return nil
})
}
// Common fetch code for iterators that are backed by vkit iterators.
func iterFetch(pageSize int, pageToken string, pi *iterator.PageInfo, next func() error) (string, error) {
pi.MaxSize = pageSize
pi.Token = pageToken
// Get one item, which will fill the buffer.
if err := next(); err != nil {
return "", err
}
// Collect the rest of the buffer.
for pi.Remaining() > 0 {
if err := next(); err != nil {
return "", err
}
}
return pi.Token, nil
}