forked from influxdata/influxdb
-
Notifications
You must be signed in to change notification settings - Fork 0
/
client.go
278 lines (248 loc) · 6.94 KB
/
client.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
package bolt
import (
"context"
"fmt"
"io"
"os"
"path"
"time"
bolt "github.com/coreos/bbolt"
"github.com/influxdata/influxdb/chronograf"
"github.com/influxdata/influxdb/chronograf/id"
)
// Client is a client for the boltDB data store.
type Client struct {
Path string
db *bolt.DB
logger chronograf.Logger
isNew bool
Now func() time.Time
LayoutIDs chronograf.ID
BuildStore *BuildStore
SourcesStore *SourcesStore
ServersStore *ServersStore
LayoutsStore *LayoutsStore
DashboardsStore *DashboardsStore
UsersStore *UsersStore
OrganizationsStore *OrganizationsStore
ConfigStore *ConfigStore
MappingsStore *MappingsStore
OrganizationConfigStore *OrganizationConfigStore
}
// NewClient initializes all stores
func NewClient() *Client {
c := &Client{Now: time.Now}
c.BuildStore = &BuildStore{client: c}
c.SourcesStore = &SourcesStore{client: c}
c.ServersStore = &ServersStore{client: c}
c.LayoutsStore = &LayoutsStore{
client: c,
IDs: &id.UUID{},
}
c.DashboardsStore = &DashboardsStore{
client: c,
IDs: &id.UUID{},
}
c.UsersStore = &UsersStore{client: c}
c.OrganizationsStore = &OrganizationsStore{client: c}
c.ConfigStore = &ConfigStore{client: c}
c.MappingsStore = &MappingsStore{client: c}
c.OrganizationConfigStore = &OrganizationConfigStore{client: c}
return c
}
// WithDB sets the boltdb database for a client. It should not be called
// after a call to Open.
func (c *Client) WithDB(db *bolt.DB) {
c.db = db
}
// Option to change behavior of Open()
type Option interface {
Backup() bool
}
// WithBackup returns a Backup
func WithBackup() Option {
return Backup{}
}
// Backup tells Open to perform a backup prior to initialization
type Backup struct {
}
// Backup returns true
func (b Backup) Backup() bool {
return true
}
// Open / create boltDB file.
func (c *Client) Open(ctx context.Context, logger chronograf.Logger, build chronograf.BuildInfo, opts ...Option) error {
if c.db == nil {
if _, err := os.Stat(c.Path); os.IsNotExist(err) {
c.isNew = true
} else if err != nil {
return err
}
// Open database file.
db, err := bolt.Open(c.Path, 0600, &bolt.Options{Timeout: 1 * time.Second})
if err != nil {
return fmt.Errorf("unable to open boltdb; is there a chronograf already running? %v", err)
}
c.db = db
c.logger = logger
for _, opt := range opts {
if opt.Backup() {
if err = c.backup(ctx, build); err != nil {
return fmt.Errorf("unable to backup your database prior to migrations: %v", err)
}
}
}
}
if err := c.initialize(ctx); err != nil {
return fmt.Errorf("unable to boot boltdb: %v", err)
}
if err := c.migrate(ctx, build); err != nil {
return fmt.Errorf("unable to migrate boltdb: %v", err)
}
return nil
}
// initialize creates Buckets that are missing
func (c *Client) initialize(ctx context.Context) error {
if err := c.db.Update(func(tx *bolt.Tx) error {
// Always create SchemaVersions bucket.
if _, err := tx.CreateBucketIfNotExists(SchemaVersionBucket); err != nil {
return err
}
// Always create Organizations bucket.
if _, err := tx.CreateBucketIfNotExists(OrganizationsBucket); err != nil {
return err
}
// Always create Sources bucket.
if _, err := tx.CreateBucketIfNotExists(SourcesBucket); err != nil {
return err
}
// Always create Servers bucket.
if _, err := tx.CreateBucketIfNotExists(ServersBucket); err != nil {
return err
}
// Always create Layouts bucket.
if _, err := tx.CreateBucketIfNotExists(LayoutsBucket); err != nil {
return err
}
// Always create Dashboards bucket.
if _, err := tx.CreateBucketIfNotExists(DashboardsBucket); err != nil {
return err
}
// Always create Users bucket.
if _, err := tx.CreateBucketIfNotExists(UsersBucket); err != nil {
return err
}
// Always create Config bucket.
if _, err := tx.CreateBucketIfNotExists(ConfigBucket); err != nil {
return err
}
// Always create Build bucket.
if _, err := tx.CreateBucketIfNotExists(BuildBucket); err != nil {
return err
}
// Always create Mapping bucket.
if _, err := tx.CreateBucketIfNotExists(MappingsBucket); err != nil {
return err
}
// Always create OrganizationConfig bucket.
if _, err := tx.CreateBucketIfNotExists(OrganizationConfigBucket); err != nil {
return err
}
return nil
}); err != nil {
return err
}
return nil
}
// migrate moves data from an old schema to a new schema in each Store
func (c *Client) migrate(ctx context.Context, build chronograf.BuildInfo) error {
if c.db != nil {
// Runtime migrations
if err := c.OrganizationsStore.Migrate(ctx); err != nil {
return err
}
if err := c.SourcesStore.Migrate(ctx); err != nil {
return err
}
if err := c.ServersStore.Migrate(ctx); err != nil {
return err
}
if err := c.LayoutsStore.Migrate(ctx); err != nil {
return err
}
if err := c.DashboardsStore.Migrate(ctx); err != nil {
return err
}
if err := c.ConfigStore.Migrate(ctx); err != nil {
return err
}
if err := c.BuildStore.Migrate(ctx, build); err != nil {
return err
}
if err := c.MappingsStore.Migrate(ctx); err != nil {
return err
}
if err := c.OrganizationConfigStore.Migrate(ctx); err != nil {
return err
}
MigrateAll(c)
}
return nil
}
// Close the connection to the bolt database
func (c *Client) Close() error {
if c.db != nil {
return c.db.Close()
}
return nil
}
// copy creates a copy of the database in toFile
func (c *Client) copy(ctx context.Context, version string) error {
backupDir := path.Join(path.Dir(c.Path), "backup")
if _, err := os.Stat(backupDir); os.IsNotExist(err) {
if err = os.Mkdir(backupDir, 0700); err != nil {
return err
}
} else if err != nil {
return err
}
fromFile, err := os.Open(c.Path)
if err != nil {
return err
}
defer fromFile.Close()
toName := fmt.Sprintf("%s.%s", path.Base(c.Path), version)
toPath := path.Join(backupDir, toName)
toFile, err := os.OpenFile(toPath, os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
return err
}
defer toFile.Close()
_, err = io.Copy(toFile, fromFile)
if err != nil {
return err
}
c.logger.Info("Successfully created ", toPath)
return nil
}
// backup makes a copy of the database to the backup/ directory, if necessary:
// - If this is a fresh install, don't create a backup and store the current version
// - If we are on the same version, don't create a backup
// - If the version has changed, create a backup and store the current version
func (c *Client) backup(ctx context.Context, build chronograf.BuildInfo) error {
lastBuild, err := c.BuildStore.Get(ctx)
if err != nil {
return err
}
if lastBuild.Version == build.Version {
return nil
}
if c.isNew {
return nil
}
// The database was pre-existing, and the version has changed
// and so create a backup
c.logger.Info("Moving from version ", lastBuild.Version)
c.logger.Info("Moving to version ", build.Version)
return c.copy(ctx, lastBuild.Version)
}