forked from heroiclabs/nakama
-
Notifications
You must be signed in to change notification settings - Fork 0
/
migrate.go
259 lines (218 loc) · 6.85 KB
/
migrate.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
// Copyright 2017 The Nakama 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 cmd
import (
"database/sql"
"flag"
"fmt"
"math"
"net/url"
"os"
"time"
"nakama/build/generated/migration"
"github.com/rubenv/sql-migrate"
"go.uber.org/zap"
)
const (
migrationTable = "migration_info"
dialect = "postgres"
defaultLimit = -1
)
type statusRow struct {
ID string
Migrated bool
AppliedAt time.Time
}
type migrationService struct {
dbAddress string
limit int
logger *zap.Logger
migrations *migrate.AssetMigrationSource
db *sql.DB
}
func MigrationStartupCheck(logger *zap.Logger, db *sql.DB) {
migrate.SetTable(migrationTable)
ms := &migrate.AssetMigrationSource{
Asset: migration.Asset,
AssetDir: migration.AssetDir,
}
migrations, err := ms.FindMigrations()
if err != nil {
logger.Fatal("Could not find migrations", zap.Error(err))
}
records, err := migrate.GetMigrationRecords(db, dialect)
if err != nil {
logger.Fatal("Could not get migration records", zap.Error(err))
}
diff := len(migrations) - len(records)
if diff > 0 {
logger.Warn("DB schema outdated, run `nakama migrate up`", zap.Int("migrations", diff))
}
if diff < 0 {
logger.Warn("DB schema newer, update Nakama", zap.Int64("migrations", int64(math.Abs(float64(diff)))))
}
}
func MigrateParse(args []string, logger *zap.Logger) {
if len(args) == 0 {
logger.Fatal("Migrate requires a subcommand. Available commands are: 'up', 'down', 'redo', 'status'.")
}
migrate.SetTable(migrationTable)
ms := &migrationService{
logger: logger,
migrations: &migrate.AssetMigrationSource{
Asset: migration.Asset,
AssetDir: migration.AssetDir,
},
}
var exec func()
switch args[0] {
case "up":
exec = ms.up
case "down":
exec = ms.down
case "redo":
exec = ms.redo
case "status":
exec = ms.status
default:
logger.Fatal("Unrecognized migrate subcommand. Available commands are: 'up', 'down', 'redo', 'status'.")
}
ms.parseSubcommand(args[1:])
rawurl := fmt.Sprintf("postgresql://%s?sslmode=disable", ms.dbAddress)
url, err := url.Parse(rawurl)
if err != nil {
logger.Fatal("Bad connection URL", zap.Error(err))
}
dbname := "nakama"
if len(url.Path) > 1 {
dbname = url.Path[1:]
}
logger.Info("Database connection", zap.String("db", ms.dbAddress))
url.Path = ""
db, err := sql.Open(dialect, url.String())
if err != nil {
logger.Fatal("Failed to open database", zap.Error(err))
}
if err = db.Ping(); err != nil {
logger.Fatal("Error pinging database", zap.Error(err))
}
var dbVersion string
if err = db.QueryRow("SELECT version()").Scan(&dbVersion); err != nil {
logger.Fatal("Error querying database version", zap.Error(err))
}
logger.Info("Database information", zap.String("version", dbVersion))
var exists bool
err = db.QueryRow("SELECT EXISTS(SELECT 1 FROM pg_database WHERE datname = $1)", dbname).Scan(&exists)
start:
switch {
case err != nil:
logger.Fatal("Database query failed", zap.Error(err))
case !exists:
_, err = db.Exec(fmt.Sprintf("CREATE DATABASE %s", dbname))
exists = err == nil
goto start
case exists:
logger.Info("Using existing database", zap.String("name", dbname))
}
db.Close()
// Append dbname to data source name.
url.Path = fmt.Sprintf("/%s", dbname)
db, err = sql.Open(dialect, url.String())
if err != nil {
logger.Fatal("Failed to open database", zap.Error(err))
}
if err = db.Ping(); err != nil {
logger.Fatal("Error pinging database", zap.Error(err))
}
ms.db = db
exec()
os.Exit(0)
}
func (ms *migrationService) up() {
if ms.limit < defaultLimit {
ms.limit = 0
}
appliedMigrations, err := migrate.ExecMax(ms.db, dialect, ms.migrations, migrate.Up, ms.limit)
if err != nil {
ms.logger.Fatal("Failed to apply migrations", zap.Int("count", appliedMigrations), zap.Error(err))
}
ms.logger.Info("Successfully applied migration", zap.Int("count", appliedMigrations))
}
func (ms *migrationService) down() {
if ms.limit < defaultLimit {
ms.limit = 1
}
appliedMigrations, err := migrate.ExecMax(ms.db, dialect, ms.migrations, migrate.Down, ms.limit)
if err != nil {
ms.logger.Fatal("Failed to migrate back", zap.Int("count", appliedMigrations), zap.Error(err))
}
ms.logger.Info("Successfully migrated back", zap.Int("count", appliedMigrations))
}
func (ms *migrationService) redo() {
if ms.limit > defaultLimit {
ms.logger.Warn("Limit is ignored when redo is invoked")
}
appliedMigrations, err := migrate.ExecMax(ms.db, dialect, ms.migrations, migrate.Down, 1)
if err != nil {
ms.logger.Fatal("Failed to migrate back", zap.Int("count", appliedMigrations), zap.Error(err))
}
ms.logger.Info("Successfully migrated back", zap.Int("count", appliedMigrations))
appliedMigrations, err = migrate.ExecMax(ms.db, dialect, ms.migrations, migrate.Up, 1)
if err != nil {
ms.logger.Fatal("Failed to apply migrations", zap.Int("count", appliedMigrations), zap.Error(err))
}
ms.logger.Info("Successfully applied migration", zap.Int("count", appliedMigrations))
}
func (ms *migrationService) status() {
if ms.limit > defaultLimit {
ms.logger.Warn("Limit is ignored when status is invoked")
}
migrations, err := ms.migrations.FindMigrations()
if err != nil {
ms.logger.Fatal("Could not find migrations", zap.Error(err))
}
records, err := migrate.GetMigrationRecords(ms.db, dialect)
if err != nil {
ms.logger.Fatal("Could not get migration records", zap.Error(err))
}
rows := make(map[string]*statusRow)
for _, m := range migrations {
rows[m.Id] = &statusRow{
ID: m.Id,
Migrated: false,
}
}
for _, r := range records {
rows[r.Id].Migrated = true
rows[r.Id].AppliedAt = r.AppliedAt
}
for _, m := range migrations {
if rows[m.Id].Migrated {
ms.logger.Info(m.Id, zap.String("applied", rows[m.Id].AppliedAt.Format(time.RFC822Z)))
} else {
ms.logger.Info(m.Id, zap.String("applied", ""))
}
}
}
func (ms *migrationService) parseSubcommand(args []string) {
flags := flag.NewFlagSet("migrate", flag.ExitOnError)
flags.StringVar(&ms.dbAddress, "database.address", "root@localhost:26257", "Address of CockroachDB server (username:password@address:port/dbname)")
flags.IntVar(&ms.limit, "limit", defaultLimit, "Number of migrations to apply forwards or backwards.")
if err := flags.Parse(args); err != nil {
ms.logger.Fatal("Could not parse migration flags.")
}
if ms.dbAddress == "" {
ms.logger.Fatal("Database connection details are required.")
}
}