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// SPDX-License-Identifier: GPL-3.0-or-later
package mysql
import (
"database/sql"
_ "embed"
"errors"
"strings"
"sync"
"time"
"github.com/netdata/netdata/go/go.d.plugin/agent/module"
"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
"github.com/blang/semver/v4"
"github.com/go-sql-driver/mysql"
_ "github.com/go-sql-driver/mysql"
)
//go:embed "config_schema.json"
var configSchema string
func init() {
module.Register("mysql", module.Creator{
JobConfigSchema: configSchema,
Create: func() module.Module { return New() },
})
}
func New() *MySQL {
return &MySQL{
Config: Config{
DSN: "root@tcp(localhost:3306)/",
Timeout: web.Duration(time.Second),
},
charts: baseCharts.Copy(),
addInnoDBOSLogOnce: &sync.Once{},
addBinlogOnce: &sync.Once{},
addMyISAMOnce: &sync.Once{},
addInnodbDeadlocksOnce: &sync.Once{},
addGaleraOnce: &sync.Once{},
addQCacheOnce: &sync.Once{},
addTableOpenCacheOverflowsOnce: &sync.Once{},
doDisableSessionQueryLog: true,
doSlaveStatus: true,
doUserStatistics: true,
collectedReplConns: make(map[string]bool),
collectedUsers: make(map[string]bool),
recheckGlobalVarsEvery: time.Minute * 10,
}
}
type Config struct {
UpdateEvery int `yaml:"update_every" json:"update_every"`
DSN string `yaml:"dsn" json:"dsn"`
MyCNF string `yaml:"my.cnf" json:"my.cnf"`
Timeout web.Duration `yaml:"timeout" json:"timeout"`
}
type MySQL struct {
module.Base
Config `yaml:",inline" json:""`
charts *module.Charts
addInnoDBOSLogOnce *sync.Once
addBinlogOnce *sync.Once
addMyISAMOnce *sync.Once
addInnodbDeadlocksOnce *sync.Once
addGaleraOnce *sync.Once
addQCacheOnce *sync.Once
addTableOpenCacheOverflowsOnce *sync.Once
db *sql.DB
safeDSN string
version *semver.Version
isMariaDB bool
isPercona bool
doDisableSessionQueryLog bool
doSlaveStatus bool
collectedReplConns map[string]bool
doUserStatistics bool
collectedUsers map[string]bool
recheckGlobalVarsTime time.Time
recheckGlobalVarsEvery time.Duration
varMaxConns int64
varTableOpenCache int64
varDisabledStorageEngine string
varLogBin string
varPerformanceSchema string
}
func (m *MySQL) Configuration() any {
return m.Config
}
func (m *MySQL) Init() error {
if m.MyCNF != "" {
dsn, err := dsnFromFile(m.MyCNF)
if err != nil {
m.Error(err)
return err
}
m.DSN = dsn
}
if m.DSN == "" {
m.Error("dsn not set")
return errors.New("dsn not set")
}
cfg, err := mysql.ParseDSN(m.DSN)
if err != nil {
m.Errorf("error on parsing DSN: %v", err)
return err
}
cfg.Passwd = strings.Repeat("*", len(cfg.Passwd))
m.safeDSN = cfg.FormatDSN()
m.Debugf("using DSN [%s]", m.DSN)
return nil
}
func (m *MySQL) Check() error {
mx, err := m.collect()
if err != nil {
m.Error(err)
return err
}
if len(mx) == 0 {
return errors.New("no metrics collected")
}
return nil
}
func (m *MySQL) Charts() *module.Charts {
return m.charts
}
func (m *MySQL) Collect() map[string]int64 {
mx, err := m.collect()
if err != nil {
m.Error(err)
}
if len(mx) == 0 {
return nil
}
return mx
}
func (m *MySQL) Cleanup() {
if m.db == nil {
return
}
if err := m.db.Close(); err != nil {
m.Errorf("cleanup: error on closing the mysql database [%s]: %v", m.safeDSN, err)
}
m.db = nil
}
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