tidb config 源码
tidb config 代码
文件路径：/config/config.go
// Copyright 2017 PingCAP, Inc.
//
// 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 config
import (
"bytes"
"encoding/base64"
"encoding/json"
"fmt"
"math"
"os"
"os/user"
"path/filepath"
"sort"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/BurntSushi/toml"
"github.com/pingcap/errors"
zaplog "github.com/pingcap/log"
logbackupconf "github.com/pingcap/tidb/br/pkg/streamhelper/config"
"github.com/pingcap/tidb/parser/terror"
"github.com/pingcap/tidb/util/logutil"
"github.com/pingcap/tidb/util/tikvutil"
"github.com/pingcap/tidb/util/versioninfo"
tikvcfg "github.com/tikv/client-go/v2/config"
tracing "github.com/uber/jaeger-client-go/config"
atomicutil "go.uber.org/atomic"
"go.uber.org/zap"
)
// Config number limitations
const (
MaxLogFileSize = 4096 // MB
// DefTxnEntrySizeLimit is the default value of TxnEntrySizeLimit.
DefTxnEntrySizeLimit = 6 * 1024 * 1024
// DefTxnTotalSizeLimit is the default value of TxnTxnTotalSizeLimit.
DefTxnTotalSizeLimit = 100 * 1024 * 1024
// DefMaxIndexLength is the maximum index length(in bytes). This value is consistent with MySQL.
DefMaxIndexLength = 3072
// DefMaxOfMaxIndexLength is the maximum index length(in bytes) for TiDB v3.0.7 and previous version.
DefMaxOfMaxIndexLength = 3072 * 4
// DefIndexLimit is the limitation of index on a single table. This value is consistent with MySQL.
DefIndexLimit = 64
// DefMaxOfIndexLimit is the maximum limitation of index on a single table for TiDB.
DefMaxOfIndexLimit = 64 * 8
// DefPort is the default port of TiDB
DefPort = 4000
// DefStatusPort is the default status port of TiDB
DefStatusPort = 10080
// DefHost is the default host of TiDB
DefHost = "0.0.0.0"
// DefStatusHost is the default status host of TiDB
DefStatusHost = "0.0.0.0"
// DefTableColumnCountLimit is limit of the number of columns in a table
DefTableColumnCountLimit = 1017
// DefMaxOfTableColumnCountLimit is maximum limitation of the number of columns in a table
DefMaxOfTableColumnCountLimit = 4096
// DefStatsLoadConcurrencyLimit is limit of the concurrency of stats-load
DefStatsLoadConcurrencyLimit = 1
// DefMaxOfStatsLoadConcurrencyLimit is maximum limitation of the concurrency of stats-load
DefMaxOfStatsLoadConcurrencyLimit = 128
// DefStatsLoadQueueSizeLimit is limit of the size of stats-load request queue
DefStatsLoadQueueSizeLimit = 1
// DefMaxOfStatsLoadQueueSizeLimit is maximum limitation of the size of stats-load request queue
DefMaxOfStatsLoadQueueSizeLimit = 100000
// DefDDLSlowOprThreshold sets log DDL operations whose execution time exceeds the threshold value.
DefDDLSlowOprThreshold = 300
// DefExpensiveQueryTimeThreshold indicates the time threshold of expensive query.
DefExpensiveQueryTimeThreshold = 60
// DefMemoryUsageAlarmRatio is the threshold triggering an alarm which the memory usage of tidb-server instance exceeds.
DefMemoryUsageAlarmRatio = 0.8
// DefTempDir is the default temporary directory path for TiDB.
DefTempDir = "/tmp/tidb"
)
// Valid config maps
var (
ValidStorage = map[string]bool{
"mocktikv": true,
"tikv": true,
"unistore": true,
}
// CheckTableBeforeDrop enable to execute `admin check table` before `drop table`.
CheckTableBeforeDrop = false
// checkBeforeDropLDFlag is a go build flag.
checkBeforeDropLDFlag = "None"
// tempStorageDirName is the default temporary storage dir name by base64 encoding a string `port/statusPort`
tempStorageDirName = encodeDefTempStorageDir(os.TempDir(), DefHost, DefStatusHost, DefPort, DefStatusPort)
)
// InstanceConfigSection indicates a config session that has options moved to [instance] session.
type InstanceConfigSection struct {
// SectionName indicates the origin section name.
SectionName string
// NameMappings maps the origin name to the name in [instance].
NameMappings map[string]string
}
var (
// sectionMovedToInstance records all config section and options that should be moved to [instance].
sectionMovedToInstance = []InstanceConfigSection{
{
"",
map[string]string{
"check-mb4-value-in-utf8": "tidb_check_mb4_value_in_utf8",
"enable-collect-execution-info": "tidb_enable_collect_execution_info",
"max-server-connections": "max_connections",
"run-ddl": "tidb_enable_ddl",
},
},
{
"log",
map[string]string{
"enable-slow-log": "tidb_enable_slow_log",
"slow-threshold": "tidb_slow_log_threshold",
"record-plan-in-slow-log": "tidb_record_plan_in_slow_log",
},
},
{
"performance",
map[string]string{
"force-priority": "tidb_force_priority",
"memory-usage-alarm-ratio": "tidb_memory_usage_alarm_ratio",
},
},
{
"plugin",
map[string]string{
"load": "plugin_load",
"dir": "plugin_dir",
},
},
}
// ConflictOptions indicates the conflict config options existing in both [instance] and other sections in config file.
ConflictOptions []InstanceConfigSection
// DeprecatedOptions indicates the config options existing in some other sections in config file.
// They should be moved to [instance] section.
DeprecatedOptions []InstanceConfigSection
// TikvConfigLock protects against concurrent tikv config refresh
TikvConfigLock sync.Mutex
)
// Config contains configuration options.
type Config struct {
Host string `toml:"host" json:"host"`
AdvertiseAddress string `toml:"advertise-address" json:"advertise-address"`
Port uint `toml:"port" json:"port"`
Cors string `toml:"cors" json:"cors"`
Store string `toml:"store" json:"store"`
Path string `toml:"path" json:"path"`
Socket string `toml:"socket" json:"socket"`
Lease string `toml:"lease" json:"lease"`
SplitTable bool `toml:"split-table" json:"split-table"`
TokenLimit uint `toml:"token-limit" json:"token-limit"`
TempDir string `toml:"temp-dir" json:"temp-dir"`
TempStoragePath string `toml:"tmp-storage-path" json:"tmp-storage-path"`
// TempStorageQuota describe the temporary storage Quota during query exector when TiDBEnableTmpStorageOnOOM is enabled
// If the quota exceed the capacity of the TempStoragePath, the tidb-server would exit with fatal error
TempStorageQuota int64 `toml:"tmp-storage-quota" json:"tmp-storage-quota"` // Bytes
TxnLocalLatches tikvcfg.TxnLocalLatches `toml:"-" json:"-"`
ServerVersion string `toml:"server-version" json:"server-version"`
VersionComment string `toml:"version-comment" json:"version-comment"`
TiDBEdition string `toml:"tidb-edition" json:"tidb-edition"`
TiDBReleaseVersion string `toml:"tidb-release-version" json:"tidb-release-version"`
Log Log `toml:"log" json:"log"`
Instance Instance `toml:"instance" json:"instance"`
Security Security `toml:"security" json:"security"`
Status Status `toml:"status" json:"status"`
Performance Performance `toml:"performance" json:"performance"`
PreparedPlanCache PreparedPlanCache `toml:"prepared-plan-cache" json:"prepared-plan-cache"`
OpenTracing OpenTracing `toml:"opentracing" json:"opentracing"`
ProxyProtocol ProxyProtocol `toml:"proxy-protocol" json:"proxy-protocol"`
PDClient tikvcfg.PDClient `toml:"pd-client" json:"pd-client"`
TiKVClient tikvcfg.TiKVClient `toml:"tikv-client" json:"tikv-client"`
Binlog Binlog `toml:"binlog" json:"binlog"`
CompatibleKillQuery bool `toml:"compatible-kill-query" json:"compatible-kill-query"`
PessimisticTxn PessimisticTxn `toml:"pessimistic-txn" json:"pessimistic-txn"`
MaxIndexLength int `toml:"max-index-length" json:"max-index-length"`
IndexLimit int `toml:"index-limit" json:"index-limit"`
TableColumnCountLimit uint32 `toml:"table-column-count-limit" json:"table-column-count-limit"`
GracefulWaitBeforeShutdown int `toml:"graceful-wait-before-shutdown" json:"graceful-wait-before-shutdown"`
// AlterPrimaryKey is used to control alter primary key feature.
AlterPrimaryKey bool `toml:"alter-primary-key" json:"alter-primary-key"`
// TreatOldVersionUTF8AsUTF8MB4 is use to treat old version table/column UTF8 charset as UTF8MB4. This is for compatibility.
// Currently not support dynamic modify, because this need to reload all old version schema.
TreatOldVersionUTF8AsUTF8MB4 bool `toml:"treat-old-version-utf8-as-utf8mb4" json:"treat-old-version-utf8-as-utf8mb4"`
// EnableTableLock indicate whether enable table lock.
// TODO: remove this after table lock features stable.
EnableTableLock bool `toml:"enable-table-lock" json:"enable-table-lock"`
DelayCleanTableLock uint64 `toml:"delay-clean-table-lock" json:"delay-clean-table-lock"`
SplitRegionMaxNum uint64 `toml:"split-region-max-num" json:"split-region-max-num"`
TopSQL TopSQL `toml:"top-sql" json:"top-sql"`
// RepairMode indicates that the TiDB is in the repair mode for table meta.
RepairMode bool `toml:"repair-mode" json:"repair-mode"`
RepairTableList []string `toml:"repair-table-list" json:"repair-table-list"`
// IsolationRead indicates that the TiDB reads data from which isolation level(engine and label).
IsolationRead IsolationRead `toml:"isolation-read" json:"isolation-read"`
// NewCollationsEnabledOnFirstBootstrap indicates if the new collations are enabled, it effects only when a TiDB cluster bootstrapped on the first time.
NewCollationsEnabledOnFirstBootstrap bool `toml:"new_collations_enabled_on_first_bootstrap" json:"new_collations_enabled_on_first_bootstrap"`
// Experimental contains parameters for experimental features.
Experimental Experimental `toml:"experimental" json:"experimental"`
// SkipRegisterToDashboard tells TiDB don't register itself to the dashboard.
SkipRegisterToDashboard bool `toml:"skip-register-to-dashboard" json:"skip-register-to-dashboard"`
// EnableTelemetry enables the usage data report to PingCAP.
EnableTelemetry bool `toml:"enable-telemetry" json:"enable-telemetry"`
// Labels indicates the labels set for the tidb server. The labels describe some specific properties for the tidb
// server like `zone`/`rack`/`host`. Currently, labels won't affect the tidb server except for some special
// label keys. Now we have following special keys:
// 1. 'group' is a special label key which should be automatically set by tidb-operator. We don't suggest
// users to set 'group' in labels.
// 2. 'zone' is a special key that indicates the DC location of this tidb-server. If it is set, the value for this
// key will be the default value of the session variable `txn_scope` for this tidb-server.
Labels map[string]string `toml:"labels" json:"labels"`
// EnableGlobalIndex enables creating global index.
EnableGlobalIndex bool `toml:"enable-global-index" json:"enable-global-index"`
// DeprecateIntegerDisplayWidth indicates whether deprecating the max display length for integer.
DeprecateIntegerDisplayWidth bool `toml:"deprecate-integer-display-length" json:"deprecate-integer-display-length"`
// EnableEnumLengthLimit indicates whether the enum/set element length is limited.
// According to MySQL 8.0 Refman:
// The maximum supported length of an individual SET element is M <= 255 and (M x w) <= 1020,
// where M is the element literal length and w is the number of bytes required for the maximum-length character in the character set.
// See https://dev.mysql.com/doc/refman/8.0/en/string-type-syntax.html for more details.
EnableEnumLengthLimit bool `toml:"enable-enum-length-limit" json:"enable-enum-length-limit"`
// StoresRefreshInterval indicates the interval of refreshing stores info, the unit is second.
StoresRefreshInterval uint64 `toml:"stores-refresh-interval" json:"stores-refresh-interval"`
// EnableTCP4Only enables net.Listen("tcp4",...)
// Note that: it can make lvs with toa work and thus tidb can get real client ip.
EnableTCP4Only bool `toml:"enable-tcp4-only" json:"enable-tcp4-only"`
// The client will forward the requests through the follower
// if one of the following conditions happens:
// 1. there is a network partition problem between TiDB and PD leader.
// 2. there is a network partition problem between TiDB and TiKV leader.
EnableForwarding bool `toml:"enable-forwarding" json:"enable-forwarding"`
// MaxBallastObjectSize set the max size of the ballast object, the unit is byte.
// The default value is the smallest of the following two values: 2GB or
// one quarter of the total physical memory in the current system.
MaxBallastObjectSize int `toml:"max-ballast-object-size" json:"max-ballast-object-size"`
// BallastObjectSize set the initial size of the ballast object, the unit is byte.
BallastObjectSize int `toml:"ballast-object-size" json:"ballast-object-size"`
// EnableGlobalKill indicates whether to enable global kill.
TrxSummary TrxSummary `toml:"transaction-summary" json:"transaction-summary"`
EnableGlobalKill bool `toml:"enable-global-kill" json:"enable-global-kill"`
// The following items are deprecated. We need to keep them here temporarily
// to support the upgrade process. They can be removed in future.
// EnableBatchDML, MemQuotaQuery, OOMAction unused since bootstrap v90
EnableBatchDML bool `toml:"enable-batch-dml" json:"enable-batch-dml"`
MemQuotaQuery int64 `toml:"mem-quota-query" json:"mem-quota-query"`
OOMAction string `toml:"oom-action" json:"oom-action"`
// OOMUseTmpStorage unused since bootstrap v93
OOMUseTmpStorage bool `toml:"oom-use-tmp-storage" json:"oom-use-tmp-storage"`
// These items are deprecated because they are turned into instance system variables.
CheckMb4ValueInUTF8 AtomicBool `toml:"check-mb4-value-in-utf8" json:"check-mb4-value-in-utf8"`
EnableCollectExecutionInfo bool `toml:"enable-collect-execution-info" json:"enable-collect-execution-info"`
Plugin Plugin `toml:"plugin" json:"plugin"`
MaxServerConnections uint32 `toml:"max-server-connections" json:"max-server-connections"`
RunDDL bool `toml:"run-ddl" json:"run-ddl"`
}
// UpdateTempStoragePath is to update the `TempStoragePath` if port/statusPort was changed
// and the `tmp-storage-path` was not specified in the conf.toml or was specified the same as the default value.
func (c *Config) UpdateTempStoragePath() {
if c.TempStoragePath == tempStorageDirName {
c.TempStoragePath = encodeDefTempStorageDir(os.TempDir(), c.Host, c.Status.StatusHost, c.Port, c.Status.StatusPort)
} else {
c.TempStoragePath = encodeDefTempStorageDir(c.TempStoragePath, c.Host, c.Status.StatusHost, c.Port, c.Status.StatusPort)
}
}
// GetTiKVConfig returns configuration options from tikvcfg
func (c *Config) GetTiKVConfig() *tikvcfg.Config {
return &tikvcfg.Config{
CommitterConcurrency: int(tikvutil.CommitterConcurrency.Load()),
MaxTxnTTL: c.Performance.MaxTxnTTL,
TiKVClient: c.TiKVClient,
Security: c.Security.ClusterSecurity(),
PDClient: c.PDClient,
PessimisticTxn: tikvcfg.PessimisticTxn{MaxRetryCount: c.PessimisticTxn.MaxRetryCount},
TxnLocalLatches: c.TxnLocalLatches,
StoresRefreshInterval: c.StoresRefreshInterval,
OpenTracingEnable: c.OpenTracing.Enable,
Path: c.Path,
EnableForwarding: c.EnableForwarding,
TxnScope: c.Labels["zone"],
}
}
func encodeDefTempStorageDir(tempDir string, host, statusHost string, port, statusPort uint) string {
dirName := base64.URLEncoding.EncodeToString([]byte(fmt.Sprintf("%v:%v/%v:%v", host, port, statusHost, statusPort)))
osUID := ""
currentUser, err := user.Current()
if err == nil {
osUID = currentUser.Uid
}
return filepath.Join(tempDir, osUID+"_tidb", dirName, "tmp-storage")
}
// nullableBool defaults unset bool options to unset instead of false, which enables us to know if the user has set 2
// conflict options at the same time.
type nullableBool struct {
IsValid bool
IsTrue bool
}
var (
nbUnset = nullableBool{false, false}
nbFalse = nullableBool{true, false}
nbTrue = nullableBool{true, true}
)
func (b *nullableBool) toBool() bool {
return b.IsValid && b.IsTrue
}
func (b nullableBool) MarshalJSON() ([]byte, error) {
switch b {
case nbTrue:
return json.Marshal(true)
case nbFalse:
return json.Marshal(false)
default:
return json.Marshal(nil)
}
}
func (b *nullableBool) UnmarshalText(text []byte) error {
str := string(text)
switch str {
case "", "null":
*b = nbUnset
return nil
case "true":
*b = nbTrue
case "false":
*b = nbFalse
default:
*b = nbUnset
return errors.New("Invalid value for bool type: " + str)
}
return nil
}
func (b nullableBool) MarshalText() ([]byte, error) {
if !b.IsValid {
return []byte(""), nil
}
if b.IsTrue {
return []byte("true"), nil
}
return []byte("false"), nil
}
func (b *nullableBool) UnmarshalJSON(data []byte) error {
var err error
var v interface{}
if err = json.Unmarshal(data, &v); err != nil {
return err
}
switch raw := v.(type) {
case bool:
*b = nullableBool{true, raw}
default:
*b = nbUnset
}
return err
}
// AtomicBool is a helper type for atomic operations on a boolean value.
type AtomicBool struct {
atomicutil.Bool
}
// NewAtomicBool creates an AtomicBool.
func NewAtomicBool(v bool) *AtomicBool {
return &AtomicBool{*atomicutil.NewBool(v)}
}
// MarshalText implements the encoding.TextMarshaler interface.
func (b AtomicBool) MarshalText() ([]byte, error) {
if b.Load() {
return []byte("true"), nil
}
return []byte("false"), nil
}
// UnmarshalText implements the encoding.TextUnmarshaler interface.
func (b *AtomicBool) UnmarshalText(text []byte) error {
str := string(text)
switch str {
case "", "null":
*b = AtomicBool{*atomicutil.NewBool(false)}
case "true":
*b = AtomicBool{*atomicutil.NewBool(true)}
case "false":
*b = AtomicBool{*atomicutil.NewBool(false)}
default:
*b = AtomicBool{*atomicutil.NewBool(false)}
return errors.New("Invalid value for bool type: " + str)
}
return nil
}
// LogBackup is the config for log backup service.
// For now, it includes the embed advancer.
type LogBackup struct {
Advancer logbackupconf.Config `toml:"advancer" json:"advancer"`
Enabled bool `toml:"enabled" json:"enabled"`
}
// Log is the log section of config.
type Log struct {
// Log level.
Level string `toml:"level" json:"level"`
// Log format, one of json or text.
Format string `toml:"format" json:"format"`
// Disable automatic timestamps in output. Deprecated: use EnableTimestamp instead.
DisableTimestamp nullableBool `toml:"disable-timestamp" json:"disable-timestamp"`
// EnableTimestamp enables automatic timestamps in log output.
EnableTimestamp nullableBool `toml:"enable-timestamp" json:"enable-timestamp"`
// DisableErrorStack stops annotating logs with the full stack error
// message. Deprecated: use EnableErrorStack instead.
DisableErrorStack nullableBool `toml:"disable-error-stack" json:"disable-error-stack"`
// EnableErrorStack enables annotating logs with the full stack error
// message.
EnableErrorStack nullableBool `toml:"enable-error-stack" json:"enable-error-stack"`
// File log config.
File logutil.FileLogConfig `toml:"file" json:"file"`
SlowQueryFile string `toml:"slow-query-file" json:"slow-query-file"`
ExpensiveThreshold uint `toml:"expensive-threshold" json:"expensive-threshold"`
// The following items are deprecated. We need to keep them here temporarily
// to support the upgrade process. They can be removed in future.
// QueryLogMaxLen unused since bootstrap v90
QueryLogMaxLen uint64 `toml:"query-log-max-len" json:"query-log-max-len"`
// EnableSlowLog, SlowThreshold, RecordPlanInSlowLog are deprecated.
EnableSlowLog AtomicBool `toml:"enable-slow-log" json:"enable-slow-log"`
SlowThreshold uint64 `toml:"slow-threshold" json:"slow-threshold"`
RecordPlanInSlowLog uint32 `toml:"record-plan-in-slow-log" json:"record-plan-in-slow-log"`
}
// Instance is the section of instance scope system variables.
type Instance struct {
// These variables only exist in [instance] section.
// TiDBGeneralLog is used to log every query in the server in info level.
TiDBGeneralLog bool `toml:"tidb_general_log" json:"tidb_general_log"`
// EnablePProfSQLCPU is used to add label sql label to pprof result.
EnablePProfSQLCPU bool `toml:"tidb_pprof_sql_cpu" json:"tidb_pprof_sql_cpu"`
// DDLSlowOprThreshold sets log DDL operations whose execution time exceeds the threshold value.
DDLSlowOprThreshold uint32 `toml:"ddl_slow_threshold" json:"ddl_slow_threshold"`
// ExpensiveQueryTimeThreshold indicates the time threshold of expensive query.
ExpensiveQueryTimeThreshold uint64 `toml:"tidb_expensive_query_time_threshold" json:"tidb_expensive_query_time_threshold"`
// These variables exist in both 'instance' section and another place.
// The configuration in 'instance' section takes precedence.
EnableSlowLog AtomicBool `toml:"tidb_enable_slow_log" json:"tidb_enable_slow_log"`
SlowThreshold uint64 `toml:"tidb_slow_log_threshold" json:"tidb_slow_log_threshold"`
RecordPlanInSlowLog uint32 `toml:"tidb_record_plan_in_slow_log" json:"tidb_record_plan_in_slow_log"`
CheckMb4ValueInUTF8 AtomicBool `toml:"tidb_check_mb4_value_in_utf8" json:"tidb_check_mb4_value_in_utf8"`
ForcePriority string `toml:"tidb_force_priority" json:"tidb_force_priority"`
MemoryUsageAlarmRatio float64 `toml:"tidb_memory_usage_alarm_ratio" json:"tidb_memory_usage_alarm_ratio"`
// EnableCollectExecutionInfo enables the TiDB to collect execution info.
EnableCollectExecutionInfo bool `toml:"tidb_enable_collect_execution_info" json:"tidb_enable_collect_execution_info"`
PluginDir string `toml:"plugin_dir" json:"plugin_dir"`
PluginLoad string `toml:"plugin_load" json:"plugin_load"`
// MaxConnections is the maximum permitted number of simultaneous client connections.
MaxConnections uint32 `toml:"max_connections" json:"max_connections"`
TiDBEnableDDL AtomicBool `toml:"tidb_enable_ddl" json:"tidb_enable_ddl"`
TiDBRCReadCheckTS bool `toml:"tidb_rc_read_check_ts" json:"tidb_rc_read_check_ts"`
}
func (l *Log) getDisableTimestamp() bool {
if l.EnableTimestamp == nbUnset && l.DisableTimestamp == nbUnset {
return false
}
if l.EnableTimestamp == nbUnset {
return l.DisableTimestamp.toBool()
}
return !l.EnableTimestamp.toBool()
}
func (l *Log) getDisableErrorStack() bool {
if l.EnableErrorStack == nbUnset && l.DisableErrorStack == nbUnset {
return true
}
if l.EnableErrorStack == nbUnset {
return l.DisableErrorStack.toBool()
}
return !l.EnableErrorStack.toBool()
}
// The following constants represents the valid action configurations for Security.SpilledFileEncryptionMethod.
// "plaintext" means encryption is disabled.
// NOTE: Although the values is case insensitive, we should use lower-case
// strings because the configuration value will be transformed to lower-case
// string and compared with these constants in the further usage.
const (
SpilledFileEncryptionMethodPlaintext = "plaintext"
SpilledFileEncryptionMethodAES128CTR = "aes128-ctr"
)
// Security is the security section of the config.
type Security struct {
SkipGrantTable bool `toml:"skip-grant-table" json:"skip-grant-table"`
SSLCA string `toml:"ssl-ca" json:"ssl-ca"`
SSLCert string `toml:"ssl-cert" json:"ssl-cert"`
SSLKey string `toml:"ssl-key" json:"ssl-key"`
ClusterSSLCA string `toml:"cluster-ssl-ca" json:"cluster-ssl-ca"`
ClusterSSLCert string `toml:"cluster-ssl-cert" json:"cluster-ssl-cert"`
ClusterSSLKey string `toml:"cluster-ssl-key" json:"cluster-ssl-key"`
ClusterVerifyCN []string `toml:"cluster-verify-cn" json:"cluster-verify-cn"`
// If set to "plaintext", the spilled files will not be encrypted.
SpilledFileEncryptionMethod string `toml:"spilled-file-encryption-method" json:"spilled-file-encryption-method"`
// EnableSEM prevents SUPER users from having full access.
EnableSEM bool `toml:"enable-sem" json:"enable-sem"`
// Allow automatic TLS certificate generation
AutoTLS bool `toml:"auto-tls" json:"auto-tls"`
MinTLSVersion string `toml:"tls-version" json:"tls-version"`
RSAKeySize int `toml:"rsa-key-size" json:"rsa-key-size"`
SecureBootstrap bool `toml:"secure-bootstrap" json:"secure-bootstrap"`
}
// The ErrConfigValidationFailed error is used so that external callers can do a type assertion
// to defer handling of this specific error when someone does not want strict type checking.
// This is needed only because logging hasn't been set up at the time we parse the config file.
// This should all be ripped out once strict config checking is made the default behavior.
type ErrConfigValidationFailed struct {
confFile string
UndecodedItems []string
}
func (e *ErrConfigValidationFailed) Error() string {
return fmt.Sprintf("config file %s contained invalid configuration options: %s; check "+
"TiDB manual to make sure this option has not been deprecated and removed from your TiDB "+
"version if the option does not appear to be a typo", e.confFile, strings.Join(
e.UndecodedItems, ", "))
}
// ErrConfigInstanceSection error is used to warning the user
// which config options should be moved to 'instance'.
type ErrConfigInstanceSection struct {
confFile string
configSections *[]InstanceConfigSection
deprecatedSections *[]InstanceConfigSection
}
func (e *ErrConfigInstanceSection) Error() string {
var builder strings.Builder
if len(*e.configSections) > 0 {
builder.WriteString("Conflict configuration options exists on both [instance] section and some other sections. ")
}
if len(*e.deprecatedSections) > 0 {
builder.WriteString("Some configuration options should be moved to [instance] section. ")
}
builder.WriteString("Please use the latter config options in [instance] instead: ")
for _, configSection := range *e.configSections {
for oldName, newName := range configSection.NameMappings {
builder.WriteString(fmt.Sprintf(" (%s, %s)", oldName, newName))
}
}
for _, configSection := range *e.deprecatedSections {
for oldName, newName := range configSection.NameMappings {
builder.WriteString(fmt.Sprintf(" (%s, %s)", oldName, newName))
}
}
builder.WriteString(".")
return builder.String()
}
// ClusterSecurity returns Security info for cluster
func (s *Security) ClusterSecurity() tikvcfg.Security {
return tikvcfg.NewSecurity(s.ClusterSSLCA, s.ClusterSSLCert, s.ClusterSSLKey, s.ClusterVerifyCN)
}
// Status is the status section of the config.
type Status struct {
StatusHost string `toml:"status-host" json:"status-host"`
MetricsAddr string `toml:"metrics-addr" json:"metrics-addr"`
StatusPort uint `toml:"status-port" json:"status-port"`
MetricsInterval uint `toml:"metrics-interval" json:"metrics-interval"`
ReportStatus bool `toml:"report-status" json:"report-status"`
RecordQPSbyDB bool `toml:"record-db-qps" json:"record-db-qps"`
// After a duration of this time in seconds if the server doesn't see any activity it pings
// the client to see if the transport is still alive.
GRPCKeepAliveTime uint `toml:"grpc-keepalive-time" json:"grpc-keepalive-time"`
// After having pinged for keepalive check, the server waits for a duration of timeout in seconds
// and if no activity is seen even after that the connection is closed.
GRPCKeepAliveTimeout uint `toml:"grpc-keepalive-timeout" json:"grpc-keepalive-timeout"`
// The number of max concurrent streams/requests on a client connection.
GRPCConcurrentStreams uint `toml:"grpc-concurrent-streams" json:"grpc-concurrent-streams"`
// Sets window size for stream. The default value is 2MB.
GRPCInitialWindowSize int `toml:"grpc-initial-window-size" json:"grpc-initial-window-size"`
// Set maximum message length in bytes that gRPC can send. `-1` means unlimited. The default value is 10MB.
GRPCMaxSendMsgSize int `toml:"grpc-max-send-msg-size" json:"grpc-max-send-msg-size"`
}
// Performance is the performance section of the config.
type Performance struct {
MaxProcs uint `toml:"max-procs" json:"max-procs"`
// Deprecated: use ServerMemoryQuota instead
MaxMemory uint64 `toml:"max-memory" json:"max-memory"`
ServerMemoryQuota uint64 `toml:"server-memory-quota" json:"server-memory-quota"`
StatsLease string `toml:"stats-lease" json:"stats-lease"`
StmtCountLimit uint `toml:"stmt-count-limit" json:"stmt-count-limit"`
PseudoEstimateRatio float64 `toml:"pseudo-estimate-ratio" json:"pseudo-estimate-ratio"`
BindInfoLease string `toml:"bind-info-lease" json:"bind-info-lease"`
TxnEntrySizeLimit uint64 `toml:"txn-entry-size-limit" json:"txn-entry-size-limit"`
TxnTotalSizeLimit uint64 `toml:"txn-total-size-limit" json:"txn-total-size-limit"`
TCPKeepAlive bool `toml:"tcp-keep-alive" json:"tcp-keep-alive"`
TCPNoDelay bool `toml:"tcp-no-delay" json:"tcp-no-delay"`
CrossJoin bool `toml:"cross-join" json:"cross-join"`
DistinctAggPushDown bool `toml:"distinct-agg-push-down" json:"distinct-agg-push-down"`
// Whether enable projection push down for coprocessors (both tikv & tiflash), default false.
ProjectionPushDown bool `toml:"projection-push-down" json:"projection-push-down"`
MaxTxnTTL uint64 `toml:"max-txn-ttl" json:"max-txn-ttl"`
// Deprecated
MemProfileInterval string `toml:"-" json:"-"`
IndexUsageSyncLease string `toml:"index-usage-sync-lease" json:"index-usage-sync-lease"`
PlanReplayerGCLease string `toml:"plan-replayer-gc-lease" json:"plan-replayer-gc-lease"`
GOGC int `toml:"gogc" json:"gogc"`
EnforceMPP bool `toml:"enforce-mpp" json:"enforce-mpp"`
StatsLoadConcurrency uint `toml:"stats-load-concurrency" json:"stats-load-concurrency"`
StatsLoadQueueSize uint `toml:"stats-load-queue-size" json:"stats-load-queue-size"`
EnableStatsCacheMemQuota bool `toml:"enable-stats-cache-mem-quota" json:"enable-stats-cache-mem-quota"`
// The following items are deprecated. We need to keep them here temporarily
// to support the upgrade process. They can be removed in future.
// CommitterConcurrency, RunAutoAnalyze unused since bootstrap v90
CommitterConcurrency int `toml:"committer-concurrency" json:"committer-concurrency"`
RunAutoAnalyze bool `toml:"run-auto-analyze" json:"run-auto-analyze"`
// ForcePriority, MemoryUsageAlarmRatio are deprecated.
ForcePriority string `toml:"force-priority" json:"force-priority"`
MemoryUsageAlarmRatio float64 `toml:"memory-usage-alarm-ratio" json:"memory-usage-alarm-ratio"`
EnableLoadFMSketch bool `toml:"enable-load-fmsketch" json:"enable-load-fmsketch"`
}
// PlanCache is the PlanCache section of the config.
type PlanCache struct {
Enabled bool `toml:"enabled" json:"enabled"`
Capacity uint `toml:"capacity" json:"capacity"`
Shards uint `toml:"shards" json:"shards"`
}
// PreparedPlanCache is the PreparedPlanCache section of the config.
type PreparedPlanCache struct {
Enabled bool `toml:"enabled" json:"enabled"`
Capacity uint `toml:"capacity" json:"capacity"`
MemoryGuardRatio float64 `toml:"memory-guard-ratio" json:"memory-guard-ratio"`
}
// OpenTracing is the opentracing section of the config.
type OpenTracing struct {
Enable bool `toml:"enable" json:"enable"`
RPCMetrics bool `toml:"rpc-metrics" json:"rpc-metrics"`
Sampler OpenTracingSampler `toml:"sampler" json:"sampler"`
Reporter OpenTracingReporter `toml:"reporter" json:"reporter"`
}
// OpenTracingSampler is the config for opentracing sampler.
// See https://godoc.org/github.com/uber/jaeger-client-go/config#SamplerConfig
type OpenTracingSampler struct {
Type string `toml:"type" json:"type"`
Param float64 `toml:"param" json:"param"`
SamplingServerURL string `toml:"sampling-server-url" json:"sampling-server-url"`
MaxOperations int `toml:"max-operations" json:"max-operations"`
SamplingRefreshInterval time.Duration `toml:"sampling-refresh-interval" json:"sampling-refresh-interval"`
}
// OpenTracingReporter is the config for opentracing reporter.
// See https://godoc.org/github.com/uber/jaeger-client-go/config#ReporterConfig
type OpenTracingReporter struct {
QueueSize int `toml:"queue-size" json:"queue-size"`
BufferFlushInterval time.Duration `toml:"buffer-flush-interval" json:"buffer-flush-interval"`
LogSpans bool `toml:"log-spans" json:"log-spans"`
LocalAgentHostPort string `toml:"local-agent-host-port" json:"local-agent-host-port"`
}
// ProxyProtocol is the PROXY protocol section of the config.
type ProxyProtocol struct {
// PROXY protocol acceptable client networks.
// Empty string means disable PROXY protocol,
// * means all networks.
Networks string `toml:"networks" json:"networks"`
// PROXY protocol header read timeout, Unit is second.
HeaderTimeout uint `toml:"header-timeout" json:"header-timeout"`
}
// Binlog is the config for binlog.
type Binlog struct {
Enable bool `toml:"enable" json:"enable"`
// If IgnoreError is true, when writing binlog meets error, TiDB would
// ignore the error.
IgnoreError bool `toml:"ignore-error" json:"ignore-error"`
WriteTimeout string `toml:"write-timeout" json:"write-timeout"`
// Use socket file to write binlog, for compatible with kafka version tidb-binlog.
BinlogSocket string `toml:"binlog-socket" json:"binlog-socket"`
// The strategy for sending binlog to pump, value can be "range" or "hash" now.
Strategy string `toml:"strategy" json:"strategy"`
}
// PessimisticTxn is the config for pessimistic transaction.
type PessimisticTxn struct {
// The max count of retry for a single statement in a pessimistic transaction.
MaxRetryCount uint `toml:"max-retry-count" json:"max-retry-count"`
// The max count of deadlock events that will be recorded in the information_schema.deadlocks table.
DeadlockHistoryCapacity uint `toml:"deadlock-history-capacity" json:"deadlock-history-capacity"`
// Whether retryable deadlocks (in-statement deadlocks) are collected to the information_schema.deadlocks table.
DeadlockHistoryCollectRetryable bool `toml:"deadlock-history-collect-retryable" json:"deadlock-history-collect-retryable"`
// PessimisticAutoCommit represents if true it means the auto-commit transactions will be in pessimistic mode.
PessimisticAutoCommit AtomicBool `toml:"pessimistic-auto-commit" json:"pessimistic-auto-commit"`
}
// TrxSummary is the config for transaction summary collecting.
type TrxSummary struct {
// how many transaction summary in `transaction_summary` each TiDB node should keep.
TransactionSummaryCapacity uint `toml:"transaction-summary-capacity" json:"transaction-summary-capacity"`
// how long a transaction should be executed to make it be recorded in `transaction_id_digest`.
TransactionIDDigestMinDuration uint `toml:"transaction-id-digest-min-duration" json:"transaction-id-digest-min-duration"`
}
// Valid Validatse TrxSummary configs
func (config *TrxSummary) Valid() error {
if config.TransactionSummaryCapacity > 5000 {
return errors.New("transaction-summary.transaction-summary-capacity should not be larger than 5000")
}
return nil
}
// DefaultPessimisticTxn returns the default configuration for PessimisticTxn
func DefaultPessimisticTxn() PessimisticTxn {
return PessimisticTxn{
MaxRetryCount: 256,
DeadlockHistoryCapacity: 10,
DeadlockHistoryCollectRetryable: false,
PessimisticAutoCommit: *NewAtomicBool(false),
}
}
// DefaultTrxSummary returns the default configuration for TrxSummary collector
func DefaultTrxSummary() TrxSummary {
// TrxSummary is not enabled by default before GA
return TrxSummary{
TransactionSummaryCapacity: 500,
TransactionIDDigestMinDuration: 2147483647,
}
}
// Plugin is the config for plugin
type Plugin struct {
Dir string `toml:"dir" json:"dir"`
Load string `toml:"load" json:"load"`
}
// TopSQL is the config for TopSQL.
type TopSQL struct {
// The TopSQL's data receiver address.
ReceiverAddress string `toml:"receiver-address" json:"receiver-address"`
}
// IsolationRead is the config for isolation read.
type IsolationRead struct {
// Engines filters tidb-server access paths by engine type.
Engines []string `toml:"engines" json:"engines"`
}
// Experimental controls the features that are still experimental: their semantics, interfaces are subject to change.
// Using these features in the production environment is not recommended.
type Experimental struct {
// Whether enable creating expression index.
AllowsExpressionIndex bool `toml:"allow-expression-index" json:"allow-expression-index"`
// Whether enable charset feature.
EnableNewCharset bool `toml:"enable-new-charset" json:"-"`
}
var defTiKVCfg = tikvcfg.DefaultConfig()
var defaultConf = Config{
Host: DefHost,
AdvertiseAddress: "",
Port: DefPort,
Socket: "/tmp/tidb-{Port}.sock",
Cors: "",
Store: "unistore",
Path: "/tmp/tidb",
RunDDL: true,
SplitTable: true,
Lease: "45s",
TokenLimit: 1000,
OOMUseTmpStorage: true,
TempDir: DefTempDir,
TempStorageQuota: -1,
TempStoragePath: tempStorageDirName,
MemQuotaQuery: 1 << 30,
OOMAction: "cancel",
EnableBatchDML: false,
CheckMb4ValueInUTF8: *NewAtomicBool(true),
MaxIndexLength: 3072,
IndexLimit: 64,
TableColumnCountLimit: 1017,
AlterPrimaryKey: false,
TreatOldVersionUTF8AsUTF8MB4: true,
EnableTableLock: false,
DelayCleanTableLock: 0,
SplitRegionMaxNum: 1000,
RepairMode: false,
RepairTableList: []string{},
MaxServerConnections: 0,
TxnLocalLatches: defTiKVCfg.TxnLocalLatches,
GracefulWaitBeforeShutdown: 0,
ServerVersion: "",
TiDBEdition: "",
VersionComment: "",
TiDBReleaseVersion: "",
Log: Log{
Level: "info",
Format: "text",
File: logutil.NewFileLogConfig(logutil.DefaultLogMaxSize),
SlowQueryFile: "tidb-slow.log",
SlowThreshold: logutil.DefaultSlowThreshold,
ExpensiveThreshold: 10000,
DisableErrorStack: nbUnset,
EnableErrorStack: nbUnset, // If both options are nbUnset, getDisableErrorStack() returns true
EnableTimestamp: nbUnset,
DisableTimestamp: nbUnset, // If both options are nbUnset, getDisableTimestamp() returns false
QueryLogMaxLen: logutil.DefaultQueryLogMaxLen,
RecordPlanInSlowLog: logutil.DefaultRecordPlanInSlowLog,
EnableSlowLog: *NewAtomicBool(logutil.DefaultTiDBEnableSlowLog),
},
Instance: Instance{
TiDBGeneralLog: false,
EnablePProfSQLCPU: false,
DDLSlowOprThreshold: DefDDLSlowOprThreshold,
ExpensiveQueryTimeThreshold: DefExpensiveQueryTimeThreshold,
EnableSlowLog: *NewAtomicBool(logutil.DefaultTiDBEnableSlowLog),
SlowThreshold: logutil.DefaultSlowThreshold,
RecordPlanInSlowLog: logutil.DefaultRecordPlanInSlowLog,
CheckMb4ValueInUTF8: *NewAtomicBool(true),
ForcePriority: "NO_PRIORITY",
MemoryUsageAlarmRatio: DefMemoryUsageAlarmRatio,
EnableCollectExecutionInfo: true,
PluginDir: "/data/deploy/plugin",
PluginLoad: "",
MaxConnections: 0,
TiDBEnableDDL: *NewAtomicBool(true),
TiDBRCReadCheckTS: false,
},
Status: Status{
ReportStatus: true,
StatusHost: DefStatusHost,
StatusPort: DefStatusPort,
MetricsInterval: 15,
RecordQPSbyDB: false,
GRPCKeepAliveTime: 10,
GRPCKeepAliveTimeout: 3,
GRPCConcurrentStreams: 1024,
GRPCInitialWindowSize: 2 * 1024 * 1024,
GRPCMaxSendMsgSize: math.MaxInt32,
},
Performance: Performance{
MaxMemory: 0,
ServerMemoryQuota: 0,
MemoryUsageAlarmRatio: DefMemoryUsageAlarmRatio,
TCPKeepAlive: true,
TCPNoDelay: true,
CrossJoin: true,
StatsLease: "3s",
StmtCountLimit: 5000,
PseudoEstimateRatio: 0.8,
ForcePriority: "NO_PRIORITY",
BindInfoLease: "3s",
TxnEntrySizeLimit: DefTxnEntrySizeLimit,
TxnTotalSizeLimit: DefTxnTotalSizeLimit,
DistinctAggPushDown: false,
ProjectionPushDown: false,
CommitterConcurrency: defTiKVCfg.CommitterConcurrency,
MaxTxnTTL: defTiKVCfg.MaxTxnTTL, // 1hour
// TODO: set indexUsageSyncLease to 60s.
IndexUsageSyncLease: "0s",
GOGC: 100,
EnforceMPP: false,
PlanReplayerGCLease: "10m",
StatsLoadConcurrency: 5,
StatsLoadQueueSize: 1000,
EnableStatsCacheMemQuota: false,
RunAutoAnalyze: true,
EnableLoadFMSketch: false,
},
ProxyProtocol: ProxyProtocol{
Networks: "",
HeaderTimeout: 5,
},
PreparedPlanCache: PreparedPlanCache{
Enabled: true,
Capacity: 100,
MemoryGuardRatio: 0.1,
},
OpenTracing: OpenTracing{
Enable: false,
Sampler: OpenTracingSampler{
Type: "const",
Param: 1.0,
},
Reporter: OpenTracingReporter{},
},
PDClient: defTiKVCfg.PDClient,
TiKVClient: defTiKVCfg.TiKVClient,
Binlog: Binlog{
WriteTimeout: "15s",
Strategy: "range",
},
Plugin: Plugin{
Dir: "/data/deploy/plugin",
Load: "",
},
PessimisticTxn: DefaultPessimisticTxn(),
IsolationRead: IsolationRead{
Engines: []string{"tikv", "tiflash", "tidb"},
},
Experimental: Experimental{},
EnableCollectExecutionInfo: true,
EnableTelemetry: true,
Labels: make(map[string]string),
EnableGlobalIndex: false,
Security: Security{
SpilledFileEncryptionMethod: SpilledFileEncryptionMethodPlaintext,
EnableSEM: false,
AutoTLS: false,
RSAKeySize: 4096,
},
DeprecateIntegerDisplayWidth: false,
EnableEnumLengthLimit: true,
StoresRefreshInterval: defTiKVCfg.StoresRefreshInterval,
EnableForwarding: defTiKVCfg.EnableForwarding,
NewCollationsEnabledOnFirstBootstrap: true,
EnableGlobalKill: true,
TrxSummary: DefaultTrxSummary(),
}
var (
globalConf atomic.Value
)
// NewConfig creates a new config instance with default value.
func NewConfig() *Config {
conf := defaultConf
return &conf
}
// GetGlobalConfig returns the global configuration for this server.
// It should store configuration from command line and configuration file.
// Other parts of the system can read the global configuration use this function.
func GetGlobalConfig() *Config {
return globalConf.Load().(*Config)
}
// StoreGlobalConfig stores a new config to the globalConf. It mostly uses in the test to avoid some data races.
func StoreGlobalConfig(config *Config) {
globalConf.Store(config)
TikvConfigLock.Lock()
defer TikvConfigLock.Unlock()
cfg := *config.GetTiKVConfig()
tikvcfg.StoreGlobalConfig(&cfg)
}
// removedConfig contains items that are no longer supported.
// they might still be in the config struct to support import,
// but are not actively used.
var removedConfig = map[string]struct{}{
"pessimistic-txn.ttl": {},
"pessimistic-txn.enable": {},
"log.file.log-rotate": {},
"log.log-slow-query": {},
"txn-local-latches": {},
"txn-local-latches.enabled": {},
"txn-local-latches.capacity": {},
"performance.max-memory": {},
"max-txn-time-use": {},
"experimental.allow-auto-random": {},
"enable-redact-log": {}, // use variable tidb_redact_log instead
"enable-streaming": {},
"performance.mem-profile-interval": {},
"security.require-secure-transport": {},
"lower-case-table-names": {},
"stmt-summary": {},
"stmt-summary.enable": {},
"stmt-summary.enable-internal-query": {},
"stmt-summary.max-stmt-count": {},
"stmt-summary.max-sql-length": {},
"stmt-summary.refresh-interval": {},
"stmt-summary.history-size": {},
"enable-batch-dml": {}, // use tidb_enable_batch_dml
"mem-quota-query": {},
"log.query-log-max-len": {},
"performance.committer-concurrency": {},
"experimental.enable-global-kill": {},
"performance.run-auto-analyze": {}, //use tidb_enable_auto_analyze
// use tidb_enable_prepared_plan_cache, tidb_prepared_plan_cache_size and tidb_prepared_plan_cache_memory_guard_ratio
"prepared-plan-cache.enabled": {},
"prepared-plan-cache.capacity": {},
"prepared-plan-cache.memory-guard-ratio": {},
"oom-action": {},
"check-mb4-value-in-utf8": {}, // use tidb_check_mb4_value_in_utf8
"enable-collect-execution-info": {}, // use tidb_enable_collect_execution_info
"log.enable-slow-log": {}, // use tidb_enable_slow_log
"log.slow-threshold": {}, // use tidb_slow_log_threshold
"log.record-plan-in-slow-log": {}, // use tidb_record_plan_in_slow_log
"performance.force-priority": {}, // use tidb_force_priority
"performance.memory-usage-alarm-ratio": {}, // use tidb_memory_usage_alarm_ratio
"plugin.load": {}, // use plugin_load
"plugin.dir": {}, // use plugin_dir
"performance.feedback-probability": {}, // This feature is deprecated
"performance.query-feedback-limit": {},
"oom-use-tmp-storage": {}, // use tidb_enable_tmp_storage_on_oom
"max-server-connections": {}, // use sysvar max_connections
"run-ddl": {}, // use sysvar tidb_enable_ddl
}
// isAllRemovedConfigItems returns true if all the items that couldn't validate
// belong to the list of removedConfig items.
func isAllRemovedConfigItems(items []string) bool {
for _, item := range items {
if _, ok := removedConfig[item]; !ok {
return false
}
}
return true
}
// InitializeConfig initialize the global config handler.
// The function enforceCmdArgs is used to merge the config file with command arguments:
// For example, if you start TiDB by the command "./tidb-server --port=3000", the port number should be
// overwritten to 3000 and ignore the port number in the config file.
func InitializeConfig(confPath string, configCheck, configStrict bool, enforceCmdArgs func(*Config)) {
cfg := GetGlobalConfig()
var err error
if confPath != "" {
if err = cfg.Load(confPath); err != nil {
// Unused config item error turns to warnings.
if tmp, ok := err.(*ErrConfigValidationFailed); ok {
// This block is to accommodate an interim situation where strict config checking
// is not the default behavior of TiDB. The warning message must be deferred until
// logging has been set up. After strict config checking is the default behavior,
// This should all be removed.
if (!configCheck && !configStrict) || isAllRemovedConfigItems(tmp.UndecodedItems) {
fmt.Fprintln(os.Stderr, err.Error())
err = nil
}
} else if tmp, ok := err.(*ErrConfigInstanceSection); ok {
logutil.BgLogger().Warn(tmp.Error())
err = nil
}
}
// In configCheck we always print out which options in the config file
// have been removed. This helps users upgrade better.
if configCheck {
err = cfg.RemovedVariableCheck(confPath)
if err != nil {
logutil.BgLogger().Warn(err.Error())
err = nil // treat as warning
}
}
terror.MustNil(err)
} else {
// configCheck should have the config file specified.
if configCheck {
fmt.Fprintln(os.Stderr, "config check failed", errors.New("no config file specified for config-check"))
os.Exit(1)
}
}
enforceCmdArgs(cfg)
if err := cfg.Valid(); err != nil {
if !filepath.IsAbs(confPath) {
if tmp, err := filepath.Abs(confPath); err == nil {
confPath = tmp
}
}
fmt.Fprintln(os.Stderr, "load config file:", confPath)
fmt.Fprintln(os.Stderr, "invalid config", err)
os.Exit(1)
}
if configCheck {
fmt.Println("config check successful")
os.Exit(0)
}
StoreGlobalConfig(cfg)
}
// RemovedVariableCheck checks if the config file contains any items
// which have been removed. These will not take effect any more.
func (c *Config) RemovedVariableCheck(confFile string) error {
metaData, err := toml.DecodeFile(confFile, c)
if err != nil {
return err
}
var removed []string
for item := range removedConfig {
// We need to split the string to account for the top level
// and the section hierarchy of config.
tmp := strings.Split(item, ".")
if len(tmp) == 2 && metaData.IsDefined(tmp[0], tmp[1]) {
removed = append(removed, item)
} else if len(tmp) == 1 && metaData.IsDefined(tmp[0]) {
removed = append(removed, item)
}
}
if len(removed) > 0 {
sort.Strings(removed) // deterministic for tests
return fmt.Errorf("The following configuration options are no longer supported in this version of TiDB. Check the release notes for more information: %s", strings.Join(removed, ", "))
}
return nil
}
// Load loads config options from a toml file.
func (c *Config) Load(confFile string) error {
metaData, err := toml.DecodeFile(confFile, c)
if c.TokenLimit == 0 {
c.TokenLimit = 1000
}
// If any items in confFile file are not mapped into the Config struct, issue
// an error and stop the server from starting.
undecoded := metaData.Undecoded()
if len(undecoded) > 0 && err == nil {
var undecodedItems []string
for _, item := range undecoded {
undecodedItems = append(undecodedItems, item.String())
}
err = &ErrConfigValidationFailed{confFile, undecodedItems}
}
for _, section := range sectionMovedToInstance {
newConflictSection := InstanceConfigSection{SectionName: section.SectionName, NameMappings: map[string]string{}}
newDeprecatedSection := InstanceConfigSection{SectionName: section.SectionName, NameMappings: map[string]string{}}
for oldName, newName := range section.NameMappings {
if section.SectionName == "" && metaData.IsDefined(oldName) ||
section.SectionName != "" && metaData.IsDefined(section.SectionName, oldName) {
if metaData.IsDefined("instance", newName) {
newConflictSection.NameMappings[oldName] = newName
} else {
newDeprecatedSection.NameMappings[oldName] = newName
}
}
}
if len(newConflictSection.NameMappings) > 0 {
ConflictOptions = append(ConflictOptions, newConflictSection)
}
if len(newDeprecatedSection.NameMappings) > 0 {
DeprecatedOptions = append(DeprecatedOptions, newDeprecatedSection)
}
}
if len(ConflictOptions) > 0 || len(DeprecatedOptions) > 0 {
// Give a warning that the 'instance' section should be used.
err = &ErrConfigInstanceSection{confFile, &ConflictOptions, &DeprecatedOptions}
}
return err
}
// Valid checks if this config is valid.
func (c *Config) Valid() error {
if c.Log.EnableErrorStack == c.Log.DisableErrorStack && c.Log.EnableErrorStack != nbUnset {
logutil.BgLogger().Warn(fmt.Sprintf("\"enable-error-stack\" (%v) conflicts \"disable-error-stack\" (%v). \"disable-error-stack\" is deprecated, please use \"enable-error-stack\" instead. disable-error-stack is ignored.", c.Log.EnableErrorStack, c.Log.DisableErrorStack))
// if two options conflict, we will use the value of EnableErrorStack
c.Log.DisableErrorStack = nbUnset
}
if c.Log.EnableTimestamp == c.Log.DisableTimestamp && c.Log.EnableTimestamp != nbUnset {
logutil.BgLogger().Warn(fmt.Sprintf("\"enable-timestamp\" (%v) conflicts \"disable-timestamp\" (%v). \"disable-timestamp\" is deprecated, please use \"enable-timestamp\" instead", c.Log.EnableTimestamp, c.Log.DisableTimestamp))
// if two options conflict, we will use the value of EnableTimestamp
c.Log.DisableTimestamp = nbUnset
}
if c.Security.SkipGrantTable && !hasRootPrivilege() {
return fmt.Errorf("TiDB run with skip-grant-table need root privilege")
}
if !ValidStorage[c.Store] {
nameList := make([]string, 0, len(ValidStorage))
for k, v := range ValidStorage {
if v {
nameList = append(nameList, k)
}
}
return fmt.Errorf("invalid store=%s, valid storages=%v", c.Store, nameList)
}
if c.Store == "mocktikv" && !c.Instance.TiDBEnableDDL.Load() {
return fmt.Errorf("can't disable DDL on mocktikv")
}
if c.MaxIndexLength < DefMaxIndexLength || c.MaxIndexLength > DefMaxOfMaxIndexLength {
return fmt.Errorf("max-index-length should be [%d, %d]", DefMaxIndexLength, DefMaxOfMaxIndexLength)
}
if c.IndexLimit < DefIndexLimit || c.IndexLimit > DefMaxOfIndexLimit {
return fmt.Errorf("index-limit should be [%d, %d]", DefIndexLimit, DefMaxOfIndexLimit)
}
if c.Log.File.MaxSize > MaxLogFileSize {
return fmt.Errorf("invalid max log file size=%v which is larger than max=%v", c.Log.File.MaxSize, MaxLogFileSize)
}
if c.TableColumnCountLimit < DefTableColumnCountLimit || c.TableColumnCountLimit > DefMaxOfTableColumnCountLimit {
return fmt.Errorf("table-column-limit should be [%d, %d]", DefIndexLimit, DefMaxOfTableColumnCountLimit)
}
// txn-local-latches
if err := c.TxnLocalLatches.Valid(); err != nil {
return err
}
// For tikvclient.
if err := c.TiKVClient.Valid(); err != nil {
return err
}
if err := c.TrxSummary.Valid(); err != nil {
return err
}
if c.Performance.TxnTotalSizeLimit > 1<<40 {
return fmt.Errorf("txn-total-size-limit should be less than %d", 1<<40)
}
if c.Instance.MemoryUsageAlarmRatio > 1 || c.Instance.MemoryUsageAlarmRatio < 0 {
return fmt.Errorf("tidb_memory_usage_alarm_ratio in [Instance] must be greater than or equal to 0 and less than or equal to 1")
}
if len(c.IsolationRead.Engines) < 1 {
return fmt.Errorf("the number of [isolation-read]engines for isolation read should be at least 1")
}
for _, engine := range c.IsolationRead.Engines {
if engine != "tidb" && engine != "tikv" && engine != "tiflash" {
return fmt.Errorf("type of [isolation-read]engines can't be %v should be one of tidb or tikv or tiflash", engine)
}
}
// test security
c.Security.SpilledFileEncryptionMethod = strings.ToLower(c.Security.SpilledFileEncryptionMethod)
switch c.Security.SpilledFileEncryptionMethod {
case SpilledFileEncryptionMethodPlaintext, SpilledFileEncryptionMethodAES128CTR:
default:
return fmt.Errorf("unsupported [security]spilled-file-encryption-method %v, TiDB only supports [%v, %v]",
c.Security.SpilledFileEncryptionMethod, SpilledFileEncryptionMethodPlaintext, SpilledFileEncryptionMethodAES128CTR)
}
// check stats load config
if c.Performance.StatsLoadConcurrency < DefStatsLoadConcurrencyLimit || c.Performance.StatsLoadConcurrency > DefMaxOfStatsLoadConcurrencyLimit {
return fmt.Errorf("stats-load-concurrency should be [%d, %d]", DefStatsLoadConcurrencyLimit, DefMaxOfStatsLoadConcurrencyLimit)
}
if c.Performance.StatsLoadQueueSize < DefStatsLoadQueueSizeLimit || c.Performance.StatsLoadQueueSize > DefMaxOfStatsLoadQueueSizeLimit {
return fmt.Errorf("stats-load-queue-size should be [%d, %d]", DefStatsLoadQueueSizeLimit, DefMaxOfStatsLoadQueueSizeLimit)
}
// test log level
l := zap.NewAtomicLevel()
return l.UnmarshalText([]byte(c.Log.Level))
}
// UpdateGlobal updates the global config, and provide a restore function that can be used to restore to the original.
func UpdateGlobal(f func(conf *Config)) {
g := GetGlobalConfig()
newConf := *g
f(&newConf)
StoreGlobalConfig(&newConf)
}
// RestoreFunc gets a function that restore the config to the current value.
func RestoreFunc() (restore func()) {
g := GetGlobalConfig()
return func() {
StoreGlobalConfig(g)
}
}
func hasRootPrivilege() bool {
return os.Geteuid() == 0
}
// TableLockEnabled uses to check whether enabled the table lock feature.
func TableLockEnabled() bool {
return GetGlobalConfig().EnableTableLock
}
// TableLockDelayClean uses to get the time of delay clean table lock.
var TableLockDelayClean = func() uint64 {
return GetGlobalConfig().DelayCleanTableLock
}
// ToLogConfig converts *Log to *logutil.LogConfig.
func (l *Log) ToLogConfig() *logutil.LogConfig {
return logutil.NewLogConfig(l.Level, l.Format, l.SlowQueryFile, l.File, l.getDisableTimestamp(), func(config *zaplog.Config) { config.DisableErrorVerbose = l.getDisableErrorStack() })
}
// ToTracingConfig converts *OpenTracing to *tracing.Configuration.
func (t *OpenTracing) ToTracingConfig() *tracing.Configuration {
ret := &tracing.Configuration{
Disabled: !t.Enable,
RPCMetrics: t.RPCMetrics,
Reporter: &tracing.ReporterConfig{},
Sampler: &tracing.SamplerConfig{},
}
ret.Reporter.QueueSize = t.Reporter.QueueSize
ret.Reporter.BufferFlushInterval = t.Reporter.BufferFlushInterval
ret.Reporter.LogSpans = t.Reporter.LogSpans
ret.Reporter.LocalAgentHostPort = t.Reporter.LocalAgentHostPort
ret.Sampler.Type = t.Sampler.Type
ret.Sampler.Param = t.Sampler.Param
ret.Sampler.SamplingServerURL = t.Sampler.SamplingServerURL
ret.Sampler.MaxOperations = t.Sampler.MaxOperations
ret.Sampler.SamplingRefreshInterval = t.Sampler.SamplingRefreshInterval
return ret
}
func init() {
initByLDFlags(versioninfo.TiDBEdition, checkBeforeDropLDFlag)
}
func initByLDFlags(edition, checkBeforeDropLDFlag string) {
if edition != versioninfo.CommunityEdition {
defaultConf.EnableTelemetry = false
}
conf := defaultConf
StoreGlobalConfig(&conf)
if checkBeforeDropLDFlag == "1" {
CheckTableBeforeDrop = true
}
}
// hideConfig is used to filter a single line of config for hiding.
var hideConfig = []string{
"performance.index-usage-sync-lease",
}
// GetJSONConfig returns the config as JSON with hidden items removed
// It replaces the earlier HideConfig() which used strings.Split() in
// an way that didn't work for similarly named items (like enable).
func GetJSONConfig() (string, error) {
j, err := json.Marshal(GetGlobalConfig())
if err != nil {
return "", err
}
jsonValue := make(map[string]interface{})
err = json.Unmarshal(j, &jsonValue)
if err != nil {
return "", err
}
removedPaths := make([]string, 0, len(removedConfig)+len(hideConfig))
for removedItem := range removedConfig {
removedPaths = append(removedPaths, removedItem)
}
removedPaths = append(removedPaths, hideConfig...)
for _, path := range removedPaths {
s := strings.Split(path, ".")
curValue := jsonValue
for i, key := range s {
if i == len(s)-1 {
delete(curValue, key)
}
if curValue[key] != nil {
mapValue, ok := curValue[key].(map[string]interface{})
if !ok {
break
}
curValue = mapValue
} else {
break
}
}
}
buf, err := json.Marshal(jsonValue)
if err != nil {
return "", err
}
var resBuf bytes.Buffer
if err = json.Indent(&resBuf, buf, "", "\t"); err != nil {
return "", err
}
return resBuf.String(), nil
}
// ContainHiddenConfig checks whether it contains the configuration that needs to be hidden.
func ContainHiddenConfig(s string) bool {
s = strings.ToLower(s)
for _, hc := range hideConfig {
if strings.Contains(s, hc) {
return true
}
}
for dc := range removedConfig {
if strings.Contains(s, dc) {
return true
}
}
return false
}
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