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telegraf/plugins/inputs/mysql/mysql.go

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package mysql
import (
"bytes"
"database/sql"
"fmt"
"strconv"
"strings"
"sync"
"time"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/internal/tls"
"github.com/influxdata/telegraf/plugins/inputs"
"github.com/influxdata/telegraf/plugins/inputs/mysql/v1"
"github.com/go-sql-driver/mysql"
)
type Mysql struct {
Servers []string `toml:"servers"`
PerfEventsStatementsDigestTextLimit int64 `toml:"perf_events_statements_digest_text_limit"`
PerfEventsStatementsLimit int64 `toml:"perf_events_statements_limit"`
PerfEventsStatementsTimeLimit int64 `toml:"perf_events_statements_time_limit"`
TableSchemaDatabases []string `toml:"table_schema_databases"`
GatherProcessList bool `toml:"gather_process_list"`
GatherUserStatistics bool `toml:"gather_user_statistics"`
GatherInfoSchemaAutoInc bool `toml:"gather_info_schema_auto_inc"`
GatherInnoDBMetrics bool `toml:"gather_innodb_metrics"`
GatherSlaveStatus bool `toml:"gather_slave_status"`
GatherBinaryLogs bool `toml:"gather_binary_logs"`
GatherTableIOWaits bool `toml:"gather_table_io_waits"`
GatherTableLockWaits bool `toml:"gather_table_lock_waits"`
GatherIndexIOWaits bool `toml:"gather_index_io_waits"`
GatherEventWaits bool `toml:"gather_event_waits"`
GatherTableSchema bool `toml:"gather_table_schema"`
GatherFileEventsStats bool `toml:"gather_file_events_stats"`
GatherPerfEventsStatements bool `toml:"gather_perf_events_statements"`
IntervalSlow string `toml:"interval_slow"`
MetricVersion int `toml:"metric_version"`
tls.ClientConfig
}
var sampleConfig = `
## specify servers via a url matching:
## [username[:password]@][protocol[(address)]]/[?tls=[true|false|skip-verify|custom]]
## see https://github.com/go-sql-driver/mysql#dsn-data-source-name
## e.g.
## servers = ["user:passwd@tcp(127.0.0.1:3306)/?tls=false"]
## servers = ["user@tcp(127.0.0.1:3306)/?tls=false"]
#
## If no servers are specified, then localhost is used as the host.
servers = ["tcp(127.0.0.1:3306)/"]
## Selects the metric output format.
##
## This option exists to maintain backwards compatibility, if you have
## existing metrics do not set or change this value until you are ready to
## migrate to the new format.
##
## If you do not have existing metrics from this plugin set to the latest
## version.
##
## Telegraf >=1.6: metric_version = 2
## <1.6: metric_version = 1 (or unset)
metric_version = 2
## the limits for metrics form perf_events_statements
perf_events_statements_digest_text_limit = 120
perf_events_statements_limit = 250
perf_events_statements_time_limit = 86400
#
## if the list is empty, then metrics are gathered from all databasee tables
table_schema_databases = []
#
## gather metrics from INFORMATION_SCHEMA.TABLES for databases provided above list
gather_table_schema = false
#
## gather thread state counts from INFORMATION_SCHEMA.PROCESSLIST
gather_process_list = true
#
## gather user statistics from INFORMATION_SCHEMA.USER_STATISTICS
gather_user_statistics = true
#
## gather auto_increment columns and max values from information schema
gather_info_schema_auto_inc = true
#
## gather metrics from INFORMATION_SCHEMA.INNODB_METRICS
gather_innodb_metrics = true
#
## gather metrics from SHOW SLAVE STATUS command output
gather_slave_status = true
#
## gather metrics from SHOW BINARY LOGS command output
gather_binary_logs = false
#
## gather metrics from PERFORMANCE_SCHEMA.TABLE_IO_WAITS_SUMMARY_BY_TABLE
gather_table_io_waits = false
#
## gather metrics from PERFORMANCE_SCHEMA.TABLE_LOCK_WAITS
gather_table_lock_waits = false
#
## gather metrics from PERFORMANCE_SCHEMA.TABLE_IO_WAITS_SUMMARY_BY_INDEX_USAGE
gather_index_io_waits = false
#
## gather metrics from PERFORMANCE_SCHEMA.EVENT_WAITS
gather_event_waits = false
#
## gather metrics from PERFORMANCE_SCHEMA.FILE_SUMMARY_BY_EVENT_NAME
gather_file_events_stats = false
#
## gather metrics from PERFORMANCE_SCHEMA.EVENTS_STATEMENTS_SUMMARY_BY_DIGEST
gather_perf_events_statements = false
#
## Some queries we may want to run less often (such as SHOW GLOBAL VARIABLES)
interval_slow = "30m"
## Optional TLS Config (will be used if tls=custom parameter specified in server uri)
# tls_ca = "/etc/telegraf/ca.pem"
# tls_cert = "/etc/telegraf/cert.pem"
# tls_key = "/etc/telegraf/key.pem"
## Use TLS but skip chain & host verification
# insecure_skip_verify = false
`
var defaultTimeout = time.Second * time.Duration(5)
func (m *Mysql) SampleConfig() string {
return sampleConfig
}
func (m *Mysql) Description() string {
return "Read metrics from one or many mysql servers"
}
var (
localhost = ""
lastT time.Time
initDone = false
scanIntervalSlow uint32
)
func (m *Mysql) InitMysql() {
if len(m.IntervalSlow) > 0 {
interval, err := time.ParseDuration(m.IntervalSlow)
if err == nil && interval.Seconds() >= 1.0 {
scanIntervalSlow = uint32(interval.Seconds())
}
}
initDone = true
}
func (m *Mysql) Gather(acc telegraf.Accumulator) error {
if len(m.Servers) == 0 {
// default to localhost if nothing specified.
return m.gatherServer(localhost, acc)
}
// Initialise additional query intervals
if !initDone {
m.InitMysql()
}
tlsConfig, err := m.ClientConfig.TLSConfig()
if err != nil {
return fmt.Errorf("registering TLS config: %s", err)
}
if tlsConfig != nil {
mysql.RegisterTLSConfig("custom", tlsConfig)
}
var wg sync.WaitGroup
// Loop through each server and collect metrics
for _, server := range m.Servers {
wg.Add(1)
go func(s string) {
defer wg.Done()
acc.AddError(m.gatherServer(s, acc))
}(server)
}
wg.Wait()
return nil
}
var (
// status counter
generalThreadStates = map[string]uint32{
"after create": uint32(0),
"altering table": uint32(0),
"analyzing": uint32(0),
"checking permissions": uint32(0),
"checking table": uint32(0),
"cleaning up": uint32(0),
"closing tables": uint32(0),
"converting heap to myisam": uint32(0),
"copying to tmp table": uint32(0),
"creating sort index": uint32(0),
"creating table": uint32(0),
"creating tmp table": uint32(0),
"deleting": uint32(0),
"executing": uint32(0),
"execution of init_command": uint32(0),
"end": uint32(0),
"freeing items": uint32(0),
"flushing tables": uint32(0),
"fulltext initialization": uint32(0),
"idle": uint32(0),
"init": uint32(0),
"killed": uint32(0),
"waiting for lock": uint32(0),
"logging slow query": uint32(0),
"login": uint32(0),
"manage keys": uint32(0),
"opening tables": uint32(0),
"optimizing": uint32(0),
"preparing": uint32(0),
"reading from net": uint32(0),
"removing duplicates": uint32(0),
"removing tmp table": uint32(0),
"reopen tables": uint32(0),
"repair by sorting": uint32(0),
"repair done": uint32(0),
"repair with keycache": uint32(0),
"replication master": uint32(0),
"rolling back": uint32(0),
"searching rows for update": uint32(0),
"sending data": uint32(0),
"sorting for group": uint32(0),
"sorting for order": uint32(0),
"sorting index": uint32(0),
"sorting result": uint32(0),
"statistics": uint32(0),
"updating": uint32(0),
"waiting for tables": uint32(0),
"waiting for table flush": uint32(0),
"waiting on cond": uint32(0),
"writing to net": uint32(0),
"other": uint32(0),
}
// plaintext statuses
stateStatusMappings = map[string]string{
"user sleep": "idle",
"creating index": "altering table",
"committing alter table to storage engine": "altering table",
"discard or import tablespace": "altering table",
"rename": "altering table",
"setup": "altering table",
"renaming result table": "altering table",
"preparing for alter table": "altering table",
"copying to group table": "copying to tmp table",
"copy to tmp table": "copying to tmp table",
"query end": "end",
"update": "updating",
"updating main table": "updating",
"updating reference tables": "updating",
"system lock": "waiting for lock",
"user lock": "waiting for lock",
"table lock": "waiting for lock",
"deleting from main table": "deleting",
"deleting from reference tables": "deleting",
}
)
// Math constants
const (
picoSeconds = 1e12
)
// metric queries
const (
globalStatusQuery = `SHOW GLOBAL STATUS`
globalVariablesQuery = `SHOW GLOBAL VARIABLES`
slaveStatusQuery = `SHOW SLAVE STATUS`
binaryLogsQuery = `SHOW BINARY LOGS`
infoSchemaProcessListQuery = `
SELECT COALESCE(command,''),COALESCE(state,''),count(*)
FROM information_schema.processlist
WHERE ID != connection_id()
GROUP BY command,state
ORDER BY null`
infoSchemaUserStatisticsQuery = `
SELECT *
FROM information_schema.user_statistics`
infoSchemaAutoIncQuery = `
SELECT table_schema, table_name, column_name, auto_increment,
CAST(pow(2, case data_type
when 'tinyint' then 7
when 'smallint' then 15
when 'mediumint' then 23
when 'int' then 31
when 'bigint' then 63
end+(column_type like '% unsigned'))-1 as decimal(19)) as max_int
FROM information_schema.tables t
JOIN information_schema.columns c USING (table_schema,table_name)
WHERE c.extra = 'auto_increment' AND t.auto_increment IS NOT NULL
`
innoDBMetricsQuery = `
SELECT NAME, COUNT
FROM information_schema.INNODB_METRICS
WHERE status='enabled'
`
perfTableIOWaitsQuery = `
SELECT OBJECT_SCHEMA, OBJECT_NAME, COUNT_FETCH, COUNT_INSERT, COUNT_UPDATE, COUNT_DELETE,
SUM_TIMER_FETCH, SUM_TIMER_INSERT, SUM_TIMER_UPDATE, SUM_TIMER_DELETE
FROM performance_schema.table_io_waits_summary_by_table
WHERE OBJECT_SCHEMA NOT IN ('mysql', 'performance_schema')
`
perfIndexIOWaitsQuery = `
SELECT OBJECT_SCHEMA, OBJECT_NAME, ifnull(INDEX_NAME, 'NONE') as INDEX_NAME,
COUNT_FETCH, COUNT_INSERT, COUNT_UPDATE, COUNT_DELETE,
SUM_TIMER_FETCH, SUM_TIMER_INSERT, SUM_TIMER_UPDATE, SUM_TIMER_DELETE
FROM performance_schema.table_io_waits_summary_by_index_usage
WHERE OBJECT_SCHEMA NOT IN ('mysql', 'performance_schema')
`
perfTableLockWaitsQuery = `
SELECT
OBJECT_SCHEMA,
OBJECT_NAME,
COUNT_READ_NORMAL,
COUNT_READ_WITH_SHARED_LOCKS,
COUNT_READ_HIGH_PRIORITY,
COUNT_READ_NO_INSERT,
COUNT_READ_EXTERNAL,
COUNT_WRITE_ALLOW_WRITE,
COUNT_WRITE_CONCURRENT_INSERT,
COUNT_WRITE_LOW_PRIORITY,
COUNT_WRITE_NORMAL,
COUNT_WRITE_EXTERNAL,
SUM_TIMER_READ_NORMAL,
SUM_TIMER_READ_WITH_SHARED_LOCKS,
SUM_TIMER_READ_HIGH_PRIORITY,
SUM_TIMER_READ_NO_INSERT,
SUM_TIMER_READ_EXTERNAL,
SUM_TIMER_WRITE_ALLOW_WRITE,
SUM_TIMER_WRITE_CONCURRENT_INSERT,
SUM_TIMER_WRITE_LOW_PRIORITY,
SUM_TIMER_WRITE_NORMAL,
SUM_TIMER_WRITE_EXTERNAL
FROM performance_schema.table_lock_waits_summary_by_table
WHERE OBJECT_SCHEMA NOT IN ('mysql', 'performance_schema', 'information_schema')
`
perfEventsStatementsQuery = `
SELECT
ifnull(SCHEMA_NAME, 'NONE') as SCHEMA_NAME,
DIGEST,
LEFT(DIGEST_TEXT, %d) as DIGEST_TEXT,
COUNT_STAR,
SUM_TIMER_WAIT,
SUM_ERRORS,
SUM_WARNINGS,
SUM_ROWS_AFFECTED,
SUM_ROWS_SENT,
SUM_ROWS_EXAMINED,
SUM_CREATED_TMP_DISK_TABLES,
SUM_CREATED_TMP_TABLES,
SUM_SORT_MERGE_PASSES,
SUM_SORT_ROWS,
SUM_NO_INDEX_USED
FROM performance_schema.events_statements_summary_by_digest
WHERE SCHEMA_NAME NOT IN ('mysql', 'performance_schema', 'information_schema')
AND last_seen > DATE_SUB(NOW(), INTERVAL %d SECOND)
ORDER BY SUM_TIMER_WAIT DESC
LIMIT %d
`
perfEventWaitsQuery = `
SELECT EVENT_NAME, COUNT_STAR, SUM_TIMER_WAIT
FROM performance_schema.events_waits_summary_global_by_event_name
`
perfFileEventsQuery = `
SELECT
EVENT_NAME,
COUNT_READ, SUM_TIMER_READ, SUM_NUMBER_OF_BYTES_READ,
COUNT_WRITE, SUM_TIMER_WRITE, SUM_NUMBER_OF_BYTES_WRITE,
COUNT_MISC, SUM_TIMER_MISC
FROM performance_schema.file_summary_by_event_name
`
tableSchemaQuery = `
SELECT
TABLE_SCHEMA,
TABLE_NAME,
TABLE_TYPE,
ifnull(ENGINE, 'NONE') as ENGINE,
ifnull(VERSION, '0') as VERSION,
ifnull(ROW_FORMAT, 'NONE') as ROW_FORMAT,
ifnull(TABLE_ROWS, '0') as TABLE_ROWS,
ifnull(DATA_LENGTH, '0') as DATA_LENGTH,
ifnull(INDEX_LENGTH, '0') as INDEX_LENGTH,
ifnull(DATA_FREE, '0') as DATA_FREE,
ifnull(CREATE_OPTIONS, 'NONE') as CREATE_OPTIONS
FROM information_schema.tables
WHERE TABLE_SCHEMA = '%s'
`
dbListQuery = `
SELECT
SCHEMA_NAME
FROM information_schema.schemata
WHERE SCHEMA_NAME NOT IN ('mysql', 'performance_schema', 'information_schema')
`
perfSchemaTablesQuery = `
SELECT
table_name
FROM information_schema.tables
WHERE table_schema = 'performance_schema' AND table_name = ?
`
)
func (m *Mysql) gatherServer(serv string, acc telegraf.Accumulator) error {
serv, err := dsnAddTimeout(serv)
if err != nil {
return err
}
db, err := sql.Open("mysql", serv)
if err != nil {
return err
}
defer db.Close()
err = m.gatherGlobalStatuses(db, serv, acc)
if err != nil {
return err
}
// Global Variables may be gathered less often
if len(m.IntervalSlow) > 0 {
if uint32(time.Since(lastT).Seconds()) >= scanIntervalSlow {
err = m.gatherGlobalVariables(db, serv, acc)
if err != nil {
return err
}
lastT = time.Now()
}
}
if m.GatherBinaryLogs {
err = m.gatherBinaryLogs(db, serv, acc)
if err != nil {
return err
}
}
if m.GatherProcessList {
err = m.GatherProcessListStatuses(db, serv, acc)
if err != nil {
return err
}
}
if m.GatherUserStatistics {
err = m.GatherUserStatisticsStatuses(db, serv, acc)
if err != nil {
return err
}
}
if m.GatherSlaveStatus {
err = m.gatherSlaveStatuses(db, serv, acc)
if err != nil {
return err
}
}
if m.GatherInfoSchemaAutoInc {
err = m.gatherInfoSchemaAutoIncStatuses(db, serv, acc)
if err != nil {
return err
}
}
if m.GatherInnoDBMetrics {
err = m.gatherInnoDBMetrics(db, serv, acc)
if err != nil {
return err
}
}
if m.GatherTableIOWaits {
err = m.gatherPerfTableIOWaits(db, serv, acc)
if err != nil {
return err
}
}
if m.GatherIndexIOWaits {
err = m.gatherPerfIndexIOWaits(db, serv, acc)
if err != nil {
return err
}
}
if m.GatherTableLockWaits {
err = m.gatherPerfTableLockWaits(db, serv, acc)
if err != nil {
return err
}
}
if m.GatherEventWaits {
err = m.gatherPerfEventWaits(db, serv, acc)
if err != nil {
return err
}
}
if m.GatherFileEventsStats {
err = m.gatherPerfFileEventsStatuses(db, serv, acc)
if err != nil {
return err
}
}
if m.GatherPerfEventsStatements {
err = m.gatherPerfEventsStatements(db, serv, acc)
if err != nil {
return err
}
}
if m.GatherTableSchema {
err = m.gatherTableSchema(db, serv, acc)
if err != nil {
return err
}
}
return nil
}
// gatherGlobalVariables can be used to fetch all global variables from
// MySQL environment.
func (m *Mysql) gatherGlobalVariables(db *sql.DB, serv string, acc telegraf.Accumulator) error {
// run query
rows, err := db.Query(globalVariablesQuery)
if err != nil {
return err
}
defer rows.Close()
var key string
var val sql.RawBytes
// parse DSN and save server tag
servtag := getDSNTag(serv)
tags := map[string]string{"server": servtag}
fields := make(map[string]interface{})
for rows.Next() {
if err := rows.Scan(&key, &val); err != nil {
return err
}
key = strings.ToLower(key)
// parse mysql version and put into field and tag
if strings.Contains(key, "version") {
fields[key] = string(val)
tags[key] = string(val)
}
if value, ok := m.parseValue(val); ok {
fields[key] = value
}
// Send 20 fields at a time
if len(fields) >= 20 {
acc.AddFields("mysql_variables", fields, tags)
fields = make(map[string]interface{})
}
}
// Send any remaining fields
if len(fields) > 0 {
acc.AddFields("mysql_variables", fields, tags)
}
return nil
}
// gatherSlaveStatuses can be used to get replication analytics
// When the server is slave, then it returns only one row.
// If the multi-source replication is set, then everything works differently
// This code does not work with multi-source replication.
func (m *Mysql) gatherSlaveStatuses(db *sql.DB, serv string, acc telegraf.Accumulator) error {
// run query
rows, err := db.Query(slaveStatusQuery)
if err != nil {
return err
}
defer rows.Close()
servtag := getDSNTag(serv)
tags := map[string]string{"server": servtag}
fields := make(map[string]interface{})
// to save the column names as a field key
// scanning keys and values separately
if rows.Next() {
// get columns names, and create an array with its length
cols, err := rows.Columns()
if err != nil {
return err
}
vals := make([]interface{}, len(cols))
// fill the array with sql.Rawbytes
for i := range vals {
vals[i] = &sql.RawBytes{}
}
if err = rows.Scan(vals...); err != nil {
return err
}
// range over columns, and try to parse values
for i, col := range cols {
if m.MetricVersion >= 2 {
col = strings.ToLower(col)
}
if value, ok := m.parseValue(*vals[i].(*sql.RawBytes)); ok {
fields["slave_"+col] = value
}
}
acc.AddFields("mysql", fields, tags)
}
return nil
}
// gatherBinaryLogs can be used to collect size and count of all binary files
// binlogs metric requires the MySQL server to turn it on in configuration
func (m *Mysql) gatherBinaryLogs(db *sql.DB, serv string, acc telegraf.Accumulator) error {
// run query
rows, err := db.Query(binaryLogsQuery)
if err != nil {
return err
}
defer rows.Close()
// parse DSN and save host as a tag
servtag := getDSNTag(serv)
tags := map[string]string{"server": servtag}
var (
size uint64 = 0
count uint64 = 0
fileSize uint64
fileName string
)
// iterate over rows and count the size and count of files
for rows.Next() {
if err := rows.Scan(&fileName, &fileSize); err != nil {
return err
}
size += fileSize
count++
}
fields := map[string]interface{}{
"binary_size_bytes": size,
"binary_files_count": count,
}
acc.AddFields("mysql", fields, tags)
return nil
}
// gatherGlobalStatuses can be used to get MySQL status metrics
// the mappings of actual names and names of each status to be exported
// to output is provided on mappings variable
func (m *Mysql) gatherGlobalStatuses(db *sql.DB, serv string, acc telegraf.Accumulator) error {
// run query
rows, err := db.Query(globalStatusQuery)
if err != nil {
return err
}
defer rows.Close()
// parse the DSN and save host name as a tag
servtag := getDSNTag(serv)
tags := map[string]string{"server": servtag}
fields := make(map[string]interface{})
for rows.Next() {
var key string
var val sql.RawBytes
if err = rows.Scan(&key, &val); err != nil {
return err
}
if m.MetricVersion < 2 {
var found bool
for _, mapped := range v1.Mappings {
if strings.HasPrefix(key, mapped.OnServer) {
// convert numeric values to integer
i, _ := strconv.Atoi(string(val))
fields[mapped.InExport+key[len(mapped.OnServer):]] = i
found = true
}
}
// Send 20 fields at a time
if len(fields) >= 20 {
acc.AddFields("mysql", fields, tags)
fields = make(map[string]interface{})
}
if found {
continue
}
// search for specific values
switch key {
case "Queries":
i, err := strconv.ParseInt(string(val), 10, 64)
if err != nil {
acc.AddError(fmt.Errorf("E! Error mysql: parsing %s int value (%s)", key, err))
} else {
fields["queries"] = i
}
case "Questions":
i, err := strconv.ParseInt(string(val), 10, 64)
if err != nil {
acc.AddError(fmt.Errorf("E! Error mysql: parsing %s int value (%s)", key, err))
} else {
fields["questions"] = i
}
case "Slow_queries":
i, err := strconv.ParseInt(string(val), 10, 64)
if err != nil {
acc.AddError(fmt.Errorf("E! Error mysql: parsing %s int value (%s)", key, err))
} else {
fields["slow_queries"] = i
}
case "Connections":
i, err := strconv.ParseInt(string(val), 10, 64)
if err != nil {
acc.AddError(fmt.Errorf("E! Error mysql: parsing %s int value (%s)", key, err))
} else {
fields["connections"] = i
}
case "Syncs":
i, err := strconv.ParseInt(string(val), 10, 64)
if err != nil {
acc.AddError(fmt.Errorf("E! Error mysql: parsing %s int value (%s)", key, err))
} else {
fields["syncs"] = i
}
case "Uptime":
i, err := strconv.ParseInt(string(val), 10, 64)
if err != nil {
acc.AddError(fmt.Errorf("E! Error mysql: parsing %s int value (%s)", key, err))
} else {
fields["uptime"] = i
}
}
} else {
key = strings.ToLower(key)
if value, ok := m.parseValue(val); ok {
fields[key] = value
}
}
// Send 20 fields at a time
if len(fields) >= 20 {
acc.AddFields("mysql", fields, tags)
fields = make(map[string]interface{})
}
}
// Send any remaining fields
if len(fields) > 0 {
acc.AddFields("mysql", fields, tags)
}
return nil
}
// GatherProcessList can be used to collect metrics on each running command
// and its state with its running count
func (m *Mysql) GatherProcessListStatuses(db *sql.DB, serv string, acc telegraf.Accumulator) error {
// run query
rows, err := db.Query(infoSchemaProcessListQuery)
if err != nil {
return err
}
defer rows.Close()
var (
command string
state string
count uint32
)
var servtag string
fields := make(map[string]interface{})
servtag = getDSNTag(serv)
// mapping of state with its counts
stateCounts := make(map[string]uint32, len(generalThreadStates))
// set map with keys and default values
for k, v := range generalThreadStates {
stateCounts[k] = v
}
for rows.Next() {
err = rows.Scan(&command, &state, &count)
if err != nil {
return err
}
// each state has its mapping
foundState := findThreadState(command, state)
// count each state
stateCounts[foundState] += count
}
tags := map[string]string{"server": servtag}
for s, c := range stateCounts {
fields[newNamespace("threads", s)] = c
}
if m.MetricVersion < 2 {
acc.AddFields("mysql_info_schema", fields, tags)
} else {
acc.AddFields("mysql_process_list", fields, tags)
}
// get count of connections from each user
conn_rows, err := db.Query("SELECT user, sum(1) AS connections FROM INFORMATION_SCHEMA.PROCESSLIST GROUP BY user")
if err != nil {
return err
}
for conn_rows.Next() {
var user string
var connections int64
err = conn_rows.Scan(&user, &connections)
if err != nil {
return err
}
tags := map[string]string{"server": servtag, "user": user}
fields := make(map[string]interface{})
fields["connections"] = connections
acc.AddFields("mysql_users", fields, tags)
}
return nil
}
// GatherUserStatistics can be used to collect metrics on each running command
// and its state with its running count
func (m *Mysql) GatherUserStatisticsStatuses(db *sql.DB, serv string, acc telegraf.Accumulator) error {
// run query
rows, err := db.Query(infoSchemaUserStatisticsQuery)
if err != nil {
// disable collecting if table is not found (mysql specific error)
// (suppresses repeat errors)
if strings.Contains(err.Error(), "nknown table 'user_statistics'") {
m.GatherUserStatistics = false
}
return err
}
defer rows.Close()
cols, err := columnsToLower(rows.Columns())
if err != nil {
return err
}
read, err := getColSlice(len(cols))
if err != nil {
return err
}
servtag := getDSNTag(serv)
for rows.Next() {
err = rows.Scan(read...)
if err != nil {
return err
}
tags := map[string]string{"server": servtag, "user": *read[0].(*string)}
fields := map[string]interface{}{}
for i := range cols {
if i == 0 {
continue // skip "user"
}
switch v := read[i].(type) {
case *int64:
fields[cols[i]] = *v
case *float64:
fields[cols[i]] = *v
case *string:
fields[cols[i]] = *v
default:
return fmt.Errorf("Unknown column type - %T", v)
}
}
acc.AddFields("mysql_user_stats", fields, tags)
}
return nil
}
// columnsToLower converts selected column names to lowercase.
func columnsToLower(s []string, e error) ([]string, error) {
if e != nil {
return nil, e
}
d := make([]string, len(s))
for i := range s {
d[i] = strings.ToLower(s[i])
}
return d, nil
}
// getColSlice returns an in interface slice that can be used in the row.Scan().
func getColSlice(l int) ([]interface{}, error) {
// list of all possible column names
var (
user string
total_connections int64
concurrent_connections int64
connected_time int64
busy_time int64
cpu_time int64
bytes_received int64
bytes_sent int64
binlog_bytes_written int64
rows_read int64
rows_sent int64
rows_deleted int64
rows_inserted int64
rows_updated int64
select_commands int64
update_commands int64
other_commands int64
commit_transactions int64
rollback_transactions int64
denied_connections int64
lost_connections int64
access_denied int64
empty_queries int64
total_ssl_connections int64
max_statement_time_exceeded int64
// maria specific
fbusy_time float64
fcpu_time float64
// percona specific
rows_fetched int64
table_rows_read int64
)
switch l {
case 23: // maria5
return []interface{}{
&user,
&total_connections,
&concurrent_connections,
&connected_time,
&fbusy_time,
&fcpu_time,
&bytes_received,
&bytes_sent,
&binlog_bytes_written,
&rows_read,
&rows_sent,
&rows_deleted,
&rows_inserted,
&rows_updated,
&select_commands,
&update_commands,
&other_commands,
&commit_transactions,
&rollback_transactions,
&denied_connections,
&lost_connections,
&access_denied,
&empty_queries,
}, nil
case 25: // maria10
return []interface{}{
&user,
&total_connections,
&concurrent_connections,
&connected_time,
&fbusy_time,
&fcpu_time,
&bytes_received,
&bytes_sent,
&binlog_bytes_written,
&rows_read,
&rows_sent,
&rows_deleted,
&rows_inserted,
&rows_updated,
&select_commands,
&update_commands,
&other_commands,
&commit_transactions,
&rollback_transactions,
&denied_connections,
&lost_connections,
&access_denied,
&empty_queries,
&total_ssl_connections,
&max_statement_time_exceeded,
}, nil
case 22: // percona
return []interface{}{
&user,
&total_connections,
&concurrent_connections,
&connected_time,
&busy_time,
&cpu_time,
&bytes_received,
&bytes_sent,
&binlog_bytes_written,
&rows_fetched,
&rows_updated,
&table_rows_read,
&select_commands,
&update_commands,
&other_commands,
&commit_transactions,
&rollback_transactions,
&denied_connections,
&lost_connections,
&access_denied,
&empty_queries,
&total_ssl_connections,
}, nil
}
return nil, fmt.Errorf("Not Supported - %d columns", l)
}
// gatherPerfTableIOWaits can be used to get total count and time
// of I/O wait event for each table and process
func (m *Mysql) gatherPerfTableIOWaits(db *sql.DB, serv string, acc telegraf.Accumulator) error {
rows, err := db.Query(perfTableIOWaitsQuery)
if err != nil {
return err
}
defer rows.Close()
var (
objSchema, objName, servtag string
countFetch, countInsert, countUpdate, countDelete float64
timeFetch, timeInsert, timeUpdate, timeDelete float64
)
servtag = getDSNTag(serv)
for rows.Next() {
err = rows.Scan(&objSchema, &objName,
&countFetch, &countInsert, &countUpdate, &countDelete,
&timeFetch, &timeInsert, &timeUpdate, &timeDelete,
)
if err != nil {
return err
}
tags := map[string]string{
"server": servtag,
"schema": objSchema,
"name": objName,
}
fields := map[string]interface{}{
"table_io_waits_total_fetch": countFetch,
"table_io_waits_total_insert": countInsert,
"table_io_waits_total_update": countUpdate,
"table_io_waits_total_delete": countDelete,
"table_io_waits_seconds_total_fetch": timeFetch / picoSeconds,
"table_io_waits_seconds_total_insert": timeInsert / picoSeconds,
"table_io_waits_seconds_total_update": timeUpdate / picoSeconds,
"table_io_waits_seconds_total_delete": timeDelete / picoSeconds,
}
acc.AddFields("mysql_perf_schema", fields, tags)
}
return nil
}
// gatherPerfIndexIOWaits can be used to get total count and time
// of I/O wait event for each index and process
func (m *Mysql) gatherPerfIndexIOWaits(db *sql.DB, serv string, acc telegraf.Accumulator) error {
rows, err := db.Query(perfIndexIOWaitsQuery)
if err != nil {
return err
}
defer rows.Close()
var (
objSchema, objName, indexName, servtag string
countFetch, countInsert, countUpdate, countDelete float64
timeFetch, timeInsert, timeUpdate, timeDelete float64
)
servtag = getDSNTag(serv)
for rows.Next() {
err = rows.Scan(&objSchema, &objName, &indexName,
&countFetch, &countInsert, &countUpdate, &countDelete,
&timeFetch, &timeInsert, &timeUpdate, &timeDelete,
)
if err != nil {
return err
}
tags := map[string]string{
"server": servtag,
"schema": objSchema,
"name": objName,
"index": indexName,
}
fields := map[string]interface{}{
"index_io_waits_total_fetch": countFetch,
"index_io_waits_seconds_total_fetch": timeFetch / picoSeconds,
}
// update write columns only when index is NONE
if indexName == "NONE" {
fields["index_io_waits_total_insert"] = countInsert
fields["index_io_waits_total_update"] = countUpdate
fields["index_io_waits_total_delete"] = countDelete
fields["index_io_waits_seconds_total_insert"] = timeInsert / picoSeconds
fields["index_io_waits_seconds_total_update"] = timeUpdate / picoSeconds
fields["index_io_waits_seconds_total_delete"] = timeDelete / picoSeconds
}
acc.AddFields("mysql_perf_schema", fields, tags)
}
return nil
}
// gatherInfoSchemaAutoIncStatuses can be used to get auto incremented values of the column
func (m *Mysql) gatherInfoSchemaAutoIncStatuses(db *sql.DB, serv string, acc telegraf.Accumulator) error {
rows, err := db.Query(infoSchemaAutoIncQuery)
if err != nil {
return err
}
defer rows.Close()
var (
schema, table, column string
incValue, maxInt uint64
)
servtag := getDSNTag(serv)
for rows.Next() {
if err := rows.Scan(&schema, &table, &column, &incValue, &maxInt); err != nil {
return err
}
tags := map[string]string{
"server": servtag,
"schema": schema,
"table": table,
"column": column,
}
fields := make(map[string]interface{})
fields["auto_increment_column"] = incValue
fields["auto_increment_column_max"] = maxInt
if m.MetricVersion < 2 {
acc.AddFields("mysql_info_schema", fields, tags)
} else {
acc.AddFields("mysql_table_schema", fields, tags)
}
}
return nil
}
// gatherInnoDBMetrics can be used to fetch enabled metrics from
// information_schema.INNODB_METRICS
func (m *Mysql) gatherInnoDBMetrics(db *sql.DB, serv string, acc telegraf.Accumulator) error {
// run query
rows, err := db.Query(innoDBMetricsQuery)
if err != nil {
return err
}
defer rows.Close()
// parse DSN and save server tag
servtag := getDSNTag(serv)
tags := map[string]string{"server": servtag}
fields := make(map[string]interface{})
for rows.Next() {
var key string
var val sql.RawBytes
if err := rows.Scan(&key, &val); err != nil {
return err
}
key = strings.ToLower(key)
if value, ok := m.parseValue(val); ok {
fields[key] = value
}
// Send 20 fields at a time
if len(fields) >= 20 {
acc.AddFields("mysql_innodb", fields, tags)
fields = make(map[string]interface{})
}
}
// Send any remaining fields
if len(fields) > 0 {
acc.AddFields("mysql_innodb", fields, tags)
}
return nil
}
// gatherPerfTableLockWaits can be used to get
// the total number and time for SQL and external lock wait events
// for each table and operation
// requires the MySQL server to be enabled to save this metric
func (m *Mysql) gatherPerfTableLockWaits(db *sql.DB, serv string, acc telegraf.Accumulator) error {
// check if table exists,
// if performance_schema is not enabled, tables do not exist
// then there is no need to scan them
var tableName string
err := db.QueryRow(perfSchemaTablesQuery, "table_lock_waits_summary_by_table").Scan(&tableName)
switch {
case err == sql.ErrNoRows:
return nil
case err != nil:
return err
}
rows, err := db.Query(perfTableLockWaitsQuery)
if err != nil {
return err
}
defer rows.Close()
servtag := getDSNTag(serv)
var (
objectSchema string
objectName string
countReadNormal float64
countReadWithSharedLocks float64
countReadHighPriority float64
countReadNoInsert float64
countReadExternal float64
countWriteAllowWrite float64
countWriteConcurrentInsert float64
countWriteLowPriority float64
countWriteNormal float64
countWriteExternal float64
timeReadNormal float64
timeReadWithSharedLocks float64
timeReadHighPriority float64
timeReadNoInsert float64
timeReadExternal float64
timeWriteAllowWrite float64
timeWriteConcurrentInsert float64
timeWriteLowPriority float64
timeWriteNormal float64
timeWriteExternal float64
)
for rows.Next() {
err = rows.Scan(
&objectSchema,
&objectName,
&countReadNormal,
&countReadWithSharedLocks,
&countReadHighPriority,
&countReadNoInsert,
&countReadExternal,
&countWriteAllowWrite,
&countWriteConcurrentInsert,
&countWriteLowPriority,
&countWriteNormal,
&countWriteExternal,
&timeReadNormal,
&timeReadWithSharedLocks,
&timeReadHighPriority,
&timeReadNoInsert,
&timeReadExternal,
&timeWriteAllowWrite,
&timeWriteConcurrentInsert,
&timeWriteLowPriority,
&timeWriteNormal,
&timeWriteExternal,
)
if err != nil {
return err
}
tags := map[string]string{
"server": servtag,
"schema": objectSchema,
"table": objectName,
}
sqlLWTags := copyTags(tags)
sqlLWTags["perf_query"] = "sql_lock_waits_total"
sqlLWFields := map[string]interface{}{
"read_normal": countReadNormal,
"read_with_shared_locks": countReadWithSharedLocks,
"read_high_priority": countReadHighPriority,
"read_no_insert": countReadNoInsert,
"write_normal": countWriteNormal,
"write_allow_write": countWriteAllowWrite,
"write_concurrent_insert": countWriteConcurrentInsert,
"write_low_priority": countWriteLowPriority,
}
acc.AddFields("mysql_perf_schema", sqlLWFields, sqlLWTags)
externalLWTags := copyTags(tags)
externalLWTags["perf_query"] = "external_lock_waits_total"
externalLWFields := map[string]interface{}{
"read": countReadExternal,
"write": countWriteExternal,
}
acc.AddFields("mysql_perf_schema", externalLWFields, externalLWTags)
sqlLWSecTotalTags := copyTags(tags)
sqlLWSecTotalTags["perf_query"] = "sql_lock_waits_seconds_total"
sqlLWSecTotalFields := map[string]interface{}{
"read_normal": timeReadNormal / picoSeconds,
"read_with_shared_locks": timeReadWithSharedLocks / picoSeconds,
"read_high_priority": timeReadHighPriority / picoSeconds,
"read_no_insert": timeReadNoInsert / picoSeconds,
"write_normal": timeWriteNormal / picoSeconds,
"write_allow_write": timeWriteAllowWrite / picoSeconds,
"write_concurrent_insert": timeWriteConcurrentInsert / picoSeconds,
"write_low_priority": timeWriteLowPriority / picoSeconds,
}
acc.AddFields("mysql_perf_schema", sqlLWSecTotalFields, sqlLWSecTotalTags)
externalLWSecTotalTags := copyTags(tags)
externalLWSecTotalTags["perf_query"] = "external_lock_waits_seconds_total"
externalLWSecTotalFields := map[string]interface{}{
"read": timeReadExternal / picoSeconds,
"write": timeWriteExternal / picoSeconds,
}
acc.AddFields("mysql_perf_schema", externalLWSecTotalFields, externalLWSecTotalTags)
}
return nil
}
// gatherPerfEventWaits can be used to get total time and number of event waits
func (m *Mysql) gatherPerfEventWaits(db *sql.DB, serv string, acc telegraf.Accumulator) error {
rows, err := db.Query(perfEventWaitsQuery)
if err != nil {
return err
}
defer rows.Close()
var (
event string
starCount, timeWait float64
)
servtag := getDSNTag(serv)
tags := map[string]string{
"server": servtag,
}
for rows.Next() {
if err := rows.Scan(&event, &starCount, &timeWait); err != nil {
return err
}
tags["event_name"] = event
fields := map[string]interface{}{
"events_waits_total": starCount,
"events_waits_seconds_total": timeWait / picoSeconds,
}
acc.AddFields("mysql_perf_schema", fields, tags)
}
return nil
}
// gatherPerfFileEvents can be used to get stats on file events
func (m *Mysql) gatherPerfFileEventsStatuses(db *sql.DB, serv string, acc telegraf.Accumulator) error {
rows, err := db.Query(perfFileEventsQuery)
if err != nil {
return err
}
defer rows.Close()
var (
eventName string
countRead, countWrite, countMisc float64
sumTimerRead, sumTimerWrite, sumTimerMisc float64
sumNumBytesRead, sumNumBytesWrite float64
)
servtag := getDSNTag(serv)
tags := map[string]string{
"server": servtag,
}
for rows.Next() {
err = rows.Scan(
&eventName,
&countRead, &sumTimerRead, &sumNumBytesRead,
&countWrite, &sumTimerWrite, &sumNumBytesWrite,
&countMisc, &sumTimerMisc,
)
if err != nil {
return err
}
tags["event_name"] = eventName
fields := make(map[string]interface{})
miscTags := copyTags(tags)
miscTags["mode"] = "misc"
fields["file_events_total"] = countWrite
fields["file_events_seconds_total"] = sumTimerMisc / picoSeconds
acc.AddFields("mysql_perf_schema", fields, miscTags)
readTags := copyTags(tags)
readTags["mode"] = "read"
fields["file_events_total"] = countRead
fields["file_events_seconds_total"] = sumTimerRead / picoSeconds
fields["file_events_bytes_totals"] = sumNumBytesRead
acc.AddFields("mysql_perf_schema", fields, readTags)
writeTags := copyTags(tags)
writeTags["mode"] = "write"
fields["file_events_total"] = countWrite
fields["file_events_seconds_total"] = sumTimerWrite / picoSeconds
fields["file_events_bytes_totals"] = sumNumBytesWrite
acc.AddFields("mysql_perf_schema", fields, writeTags)
}
return nil
}
// gatherPerfEventsStatements can be used to get attributes of each event
func (m *Mysql) gatherPerfEventsStatements(db *sql.DB, serv string, acc telegraf.Accumulator) error {
query := fmt.Sprintf(
perfEventsStatementsQuery,
m.PerfEventsStatementsDigestTextLimit,
m.PerfEventsStatementsTimeLimit,
m.PerfEventsStatementsLimit,
)
rows, err := db.Query(query)
if err != nil {
return err
}
defer rows.Close()
var (
schemaName, digest, digest_text string
count, queryTime, errors, warnings float64
rowsAffected, rowsSent, rowsExamined float64
tmpTables, tmpDiskTables float64
sortMergePasses, sortRows float64
noIndexUsed float64
)
servtag := getDSNTag(serv)
tags := map[string]string{
"server": servtag,
}
for rows.Next() {
err = rows.Scan(
&schemaName, &digest, &digest_text,
&count, &queryTime, &errors, &warnings,
&rowsAffected, &rowsSent, &rowsExamined,
&tmpTables, &tmpDiskTables,
&sortMergePasses, &sortRows,
&noIndexUsed,
)
if err != nil {
return err
}
tags["schema"] = schemaName
tags["digest"] = digest
tags["digest_text"] = digest_text
fields := map[string]interface{}{
"events_statements_total": count,
"events_statements_seconds_total": queryTime / picoSeconds,
"events_statements_errors_total": errors,
"events_statements_warnings_total": warnings,
"events_statements_rows_affected_total": rowsAffected,
"events_statements_rows_sent_total": rowsSent,
"events_statements_rows_examined_total": rowsExamined,
"events_statements_tmp_tables_total": tmpTables,
"events_statements_tmp_disk_tables_total": tmpDiskTables,
"events_statements_sort_merge_passes_total": sortMergePasses,
"events_statements_sort_rows_total": sortRows,
"events_statements_no_index_used_total": noIndexUsed,
}
acc.AddFields("mysql_perf_schema", fields, tags)
}
return nil
}
// gatherTableSchema can be used to gather stats on each schema
func (m *Mysql) gatherTableSchema(db *sql.DB, serv string, acc telegraf.Accumulator) error {
var dbList []string
servtag := getDSNTag(serv)
// if the list of databases if empty, then get all databases
if len(m.TableSchemaDatabases) == 0 {
rows, err := db.Query(dbListQuery)
if err != nil {
return err
}
defer rows.Close()
var database string
for rows.Next() {
err = rows.Scan(&database)
if err != nil {
return err
}
dbList = append(dbList, database)
}
} else {
dbList = m.TableSchemaDatabases
}
for _, database := range dbList {
rows, err := db.Query(fmt.Sprintf(tableSchemaQuery, database))
if err != nil {
return err
}
defer rows.Close()
var (
tableSchema string
tableName string
tableType string
engine string
version float64
rowFormat string
tableRows float64
dataLength float64
indexLength float64
dataFree float64
createOptions string
)
for rows.Next() {
err = rows.Scan(
&tableSchema,
&tableName,
&tableType,
&engine,
&version,
&rowFormat,
&tableRows,
&dataLength,
&indexLength,
&dataFree,
&createOptions,
)
if err != nil {
return err
}
tags := map[string]string{"server": servtag}
tags["schema"] = tableSchema
tags["table"] = tableName
if m.MetricVersion < 2 {
acc.AddFields(newNamespace("info_schema", "table_rows"),
map[string]interface{}{"value": tableRows}, tags)
dlTags := copyTags(tags)
dlTags["component"] = "data_length"
acc.AddFields(newNamespace("info_schema", "table_size", "data_length"),
map[string]interface{}{"value": dataLength}, dlTags)
ilTags := copyTags(tags)
ilTags["component"] = "index_length"
acc.AddFields(newNamespace("info_schema", "table_size", "index_length"),
map[string]interface{}{"value": indexLength}, ilTags)
dfTags := copyTags(tags)
dfTags["component"] = "data_free"
acc.AddFields(newNamespace("info_schema", "table_size", "data_free"),
map[string]interface{}{"value": dataFree}, dfTags)
} else {
acc.AddFields("mysql_table_schema",
map[string]interface{}{"rows": tableRows}, tags)
acc.AddFields("mysql_table_schema",
map[string]interface{}{"data_length": dataLength}, tags)
acc.AddFields("mysql_table_schema",
map[string]interface{}{"index_length": indexLength}, tags)
acc.AddFields("mysql_table_schema",
map[string]interface{}{"data_free": dataFree}, tags)
}
versionTags := copyTags(tags)
versionTags["type"] = tableType
versionTags["engine"] = engine
versionTags["row_format"] = rowFormat
versionTags["create_options"] = createOptions
if m.MetricVersion < 2 {
acc.AddFields(newNamespace("info_schema", "table_version"),
map[string]interface{}{"value": version}, versionTags)
} else {
acc.AddFields("mysql_table_schema_version",
map[string]interface{}{"table_version": version}, versionTags)
}
}
}
return nil
}
func (m *Mysql) parseValue(value sql.RawBytes) (interface{}, bool) {
if m.MetricVersion < 2 {
return v1.ParseValue(value)
} else {
return parseValue(value)
}
}
// parseValue can be used to convert values such as "ON","OFF","Yes","No" to 0,1
func parseValue(value sql.RawBytes) (interface{}, bool) {
if bytes.EqualFold(value, []byte("YES")) || bytes.Compare(value, []byte("ON")) == 0 {
return 1, true
}
if bytes.EqualFold(value, []byte("NO")) || bytes.Compare(value, []byte("OFF")) == 0 {
return 0, true
}
if val, err := strconv.ParseInt(string(value), 10, 64); err == nil {
return val, true
}
if val, err := strconv.ParseFloat(string(value), 64); err == nil {
return val, true
}
if len(string(value)) > 0 {
return string(value), true
}
return nil, false
}
// findThreadState can be used to find thread state by command and plain state
func findThreadState(rawCommand, rawState string) string {
var (
// replace '_' symbol with space
command = strings.Replace(strings.ToLower(rawCommand), "_", " ", -1)
state = strings.Replace(strings.ToLower(rawState), "_", " ", -1)
)
// if the state is already valid, then return it
if _, ok := generalThreadStates[state]; ok {
return state
}
// if state is plain, return the mapping
if mappedState, ok := stateStatusMappings[state]; ok {
return mappedState
}
// if the state is any lock, return the special state
if strings.Contains(state, "waiting for") && strings.Contains(state, "lock") {
return "waiting for lock"
}
if command == "sleep" && state == "" {
return "idle"
}
if command == "query" {
return "executing"
}
if command == "binlog dump" {
return "replication master"
}
// if no mappings found and state is invalid, then return "other" state
return "other"
}
// newNamespace can be used to make a namespace
func newNamespace(words ...string) string {
return strings.Replace(strings.Join(words, "_"), " ", "_", -1)
}
func copyTags(in map[string]string) map[string]string {
out := make(map[string]string)
for k, v := range in {
out[k] = v
}
return out
}
func dsnAddTimeout(dsn string) (string, error) {
conf, err := mysql.ParseDSN(dsn)
if err != nil {
return "", err
}
if conf.Timeout == 0 {
conf.Timeout = time.Second * 5
}
return conf.FormatDSN(), nil
}
func getDSNTag(dsn string) string {
conf, err := mysql.ParseDSN(dsn)
if err != nil {
return "127.0.0.1:3306"
}
return conf.Addr
}
func init() {
inputs.Add("mysql", func() telegraf.Input {
return &Mysql{}
})
}
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