-
Notifications
You must be signed in to change notification settings - Fork 175
/
conn.go
175 lines (144 loc) · 5.16 KB
/
conn.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
/*
* Copyright (c) 2019-2022. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pydio Cells is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
package mysql
import (
"context"
"database/sql"
"fmt"
"github.com/pydio/cells/v4/common/service/metrics"
"sync"
tools "github.com/go-sql-driver/mysql"
"go.uber.org/zap"
"github.com/pydio/cells/v4/common/dao"
"github.com/pydio/cells/v4/common/log"
"github.com/pydio/cells/v4/common/runtime"
"github.com/pydio/cells/v4/common/service/errors"
commonsql "github.com/pydio/cells/v4/common/sql"
)
var (
mysqlLock = &sync.Mutex{}
ConnectionsPercentPerRequest = 5
MaxConnectionsPercent = 90
IdleConnectionsPercent = 25
)
type conn struct {
conn *sql.DB
}
func (m *conn) Open(c context.Context, dsn string) (dao.Conn, error) {
var (
db *sql.DB
)
// Try to create the database to ensure it exists
mysqlConfig, err := tools.ParseDSN(dsn)
if err != nil {
return nil, err
}
dbName := mysqlConfig.DBName
mysqlConfig.DBName = ""
rootDSN := mysqlConfig.FormatDSN()
driver := "mysql"
if ssl, ok := mysqlConfig.Params["ssl"]; ok && ssl == "true" {
driver += "+tls"
}
if db, err = commonsql.GetSqlConnection(c, driver, rootDSN); err != nil {
return nil, err
}
if _, err = db.Exec(fmt.Sprintf("create database if not exists `%s`", dbName)); err != nil {
return nil, err
}
if db, err = commonsql.GetSqlConnection(c, driver, dsn); err != nil {
return nil, err
}
if !runtime.IsFork() {
if res, err := CheckCollation(c, db, dbName); err != nil && len(res) > 0 {
return nil, err
} else if len(res) > 0 {
log.Logger(c).Warn("[SQL] *************************************************************************************************************************")
log.Logger(c).Warn("[SQL] ")
log.Logger(c).Warn("[SQL] The following tables have a character set that does not match the default character set for the database...")
for k, v := range res {
log.Logger(c).Warn("[SQL] ", zap.String("name", k), zap.String("collation", v))
}
log.Logger(c).Warn("[SQL] It might be due to the database being migrated from another system or the default database having been updated.")
log.Logger(c).Warn("[SQL] It could potentially lead to issues during upgrades so we you should pre-emptively fix the tables collations.")
log.Logger(c).Warn("[SQL] Find more information here : https://pydio.com/en/docs/cells/v4/major-versions-upgrade-informations ")
log.Logger(c).Warn("[SQL] ")
log.Logger(c).Warn("[SQL] *************************************************************************************************************************")
}
var version string
if err := db.QueryRow("SELECT VERSION()").Scan(&version); err == nil {
metrics.GetMetrics().Tagged(map[string]string{
"version": version,
}).Gauge("db_version_info").Update(1)
}
}
m.conn = db
return db, nil
}
func (m *conn) GetConn(ctx context.Context) (dao.Conn, error) {
return m.conn, nil
}
func (m *conn) getMaxTotalConnections() int {
db := m.conn
var num int
if err := db.QueryRow(`select @@max_connections`).Scan(&num); err != nil {
return 0
}
return (num * MaxConnectionsPercent) / 100
}
func (m *conn) SetMaxConnectionsForWeight(num int) {
mysqlLock.Lock()
defer mysqlLock.Unlock()
maxConns := m.getMaxTotalConnections() * (num * ConnectionsPercentPerRequest) / 100
maxIdleConns := maxConns * IdleConnectionsPercent / 100
m.conn.SetMaxOpenConns(maxConns)
m.conn.SetMaxIdleConns(maxIdleConns)
}
func CheckCollation(ctx context.Context, db *sql.DB, dbName string) (map[string]string, error) {
rows, err := db.QueryContext(ctx, "SELECT TABLE_NAME, TABLE_COLLATION"+
" FROM INFORMATION_SCHEMA.TABLES tbl"+
" WHERE TABLE_SCHEMA=\""+dbName+"\" AND TABLE_TYPE=\"BASE TABLE\""+
" AND TABLE_NAME NOT LIKE '%_migrations'"+
" AND TABLE_NAME NOT LIKE '%_migration'"+
" AND TABLE_COLLATION NOT LIKE 'ascii%'"+
" AND TABLE_COLLATION NOT LIKE CONCAT(@@CHARACTER_SET_DATABASE, \"%\");")
if err != nil {
return nil, err
}
res := make(map[string]string)
for rows.Next() {
var name, collation string
rows.Scan(&name, &collation)
res[name] = collation
}
return res, nil
}
// FilterDAOErrors hides sensitive information about the underlying table
// when we receive MySQLError.
func FilterDAOErrors(err error) (error, bool) {
filtered := false
if err != nil {
if _, ok := err.(*tools.MySQLError); ok {
err = errors.InternalServerError("dao.error", "DAO error received")
filtered = true
}
}
return err, filtered
}