/
backupcommandhandler.go
179 lines (150 loc) · 4.04 KB
/
backupcommandhandler.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
package stoserver
import (
"encoding/json"
"errors"
"fmt"
"io"
"log"
"os"
"github.com/function61/eventkit/command"
"github.com/function61/gokit/logex"
"github.com/function61/ubackup/pkg/ubbackup"
"github.com/function61/ubackup/pkg/ubconfig"
"github.com/function61/ubackup/pkg/ubstorage"
"github.com/function61/ubackup/pkg/ubtypes"
"github.com/function61/varasto/pkg/stoserver/stodb"
"github.com/function61/varasto/pkg/stoserver/stodbimportexport"
"github.com/function61/varasto/pkg/stoserver/stoservertypes"
"go.etcd.io/bbolt"
)
const (
varastoUbackupServiceId = "varasto"
)
var (
backupInProgress nonBlockingLock
)
func (c *cHandlers) DatabaseBackupConfigure(cmd *stoservertypes.DatabaseBackupConfigure, ctx *command.Ctx) error {
serializedUbConfig, err := json.Marshal(&[]string{
cmd.Bucket,
cmd.BucketRegion,
cmd.AccessKeyId,
cmd.AccessKeySecret,
cmd.EncryptionPublicKey,
cmd.AlertmanagerBaseUrl,
})
if err != nil {
return err
}
conf, err := parseSerializedUbConfig(serializedUbConfig)
if err != nil {
return err
}
// validates bucket, region, access key {id,secret}
if cmd.ConnectivityCheck {
if _, err := listUbackupStoredBackups(conf.Storage, c.logger); err != nil {
return err
}
}
return c.setConfigValue(stodb.CfgUbackupConfig, string(serializedUbConfig))
}
func (c *cHandlers) DatabaseBackup(cmd *stoservertypes.DatabaseBackup, ctx *command.Ctx) error {
conf, err := ubConfigFromDb(c.db)
if err != nil {
return err
}
ok, unlock := backupInProgress.TryLock()
if !ok {
return errors.New("another backup already in progress")
}
defer unlock()
backup := ubtypes.BackupForTarget(ubtypes.BackupTarget{
ServiceName: varastoUbackupServiceId,
TaskId: fmt.Sprintf("%d", os.Getpid()),
Snapshotter: ubtypes.CustomStream(func(snapshotSink io.Writer) error {
tx, err := c.db.Begin(false)
if err != nil {
return err
}
defer func() { ignoreError(tx.Rollback()) }()
return stodbimportexport.Export(tx, snapshotSink)
}),
})
return ubbackup.BackupAndStore(ctx.Ctx, backup, *conf, logex.Prefix("µbackup", c.logger))
}
func ubConfigFromDb(db *bbolt.DB) (*ubconfig.Config, error) {
tx, err := db.Begin(false)
if err != nil {
return nil, err
}
defer func() { ignoreError(tx.Rollback()) }()
serializedUbConfig, err := stodb.CfgUbackupConfig.GetRequired(tx)
if err != nil {
return nil, err
}
return parseSerializedUbConfig([]byte(serializedUbConfig))
}
func parseSerializedUbConfig(serializedUbConfig []byte) (*ubconfig.Config, error) {
parts := []string{}
if err := json.Unmarshal(serializedUbConfig, &parts); err != nil {
return nil, err
}
if len(parts) != 6 {
return nil, fmt.Errorf("unexpected number of parts: %d", len(parts))
}
return &ubconfig.Config{
EncryptionPublicKey: parts[4],
Storage: ubconfig.StorageConfig{
S3: &ubconfig.StorageS3Config{
Bucket: parts[0],
BucketRegion: parts[1],
AccessKeyId: parts[2],
AccessKeySecret: parts[3],
},
},
AlertManager: &ubconfig.AlertManagerConfig{
BaseUrl: parts[5],
},
}, nil
}
func listUbackupStoredBackups(
storageConf ubconfig.StorageConfig,
logger *log.Logger,
) ([]stoservertypes.UbackupStoredBackup, error) {
storage, err := ubstorage.StorageFromConfig(storageConf, logger)
if err != nil {
return nil, err
}
backups, err := storage.List(varastoUbackupServiceId)
if err != nil {
return nil, err
}
ret := []stoservertypes.UbackupStoredBackup{}
for _, backup := range backups {
ret = append(ret, stoservertypes.UbackupStoredBackup{
ID: backup.ID,
Size: int(backup.Size),
Timestamp: backup.Timestamp,
Description: backup.Description,
})
}
return ret, nil
}
func downloadBackup(
backupId string,
output io.Writer,
conf ubconfig.Config,
logger *log.Logger,
) error {
storage, err := ubstorage.StorageFromConfig(conf.Storage, logger)
if err != nil {
return err
}
backupReader, err := storage.Get(backupId)
if err != nil {
return err
}
if _, err := io.Copy(output, backupReader); err != nil {
return err
}
return backupReader.Close()
}