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Handle mysql input variations in the user_statistics collecting (#4306) 

(cherry picked from commit 54056f3808)
This commit is contained in:
Greg 2018-06-29 19:16:52 -06:00 committed by Daniel Nelson
parent d112323d81
commit 70c20b0bc4
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GPG Key ID: CAAD59C9444F6155
1 changed files with 193 additions and 156 deletions
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349
plugins/inputs/mysql/mysql.go
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@ -4,7 +4,6 @@ import (
"bytes" "bytes"
"database/sql" "database/sql"
"fmt" "fmt"
"log"
"strconv" "strconv"
"strings" "strings"
"sync" "sync"
@ -80,7 +79,7 @@ var sampleConfig = `
## gather thread state counts from INFORMATION_SCHEMA.PROCESSLIST ## gather thread state counts from INFORMATION_SCHEMA.PROCESSLIST
gather_process_list = true gather_process_list = true
# #
## gather thread state counts from INFORMATION_SCHEMA.USER_STATISTICS ## gather user statistics from INFORMATION_SCHEMA.USER_STATISTICS
gather_user_statistics = true gather_user_statistics = true
# #
## gather auto_increment columns and max values from information schema ## gather auto_increment columns and max values from information schema
@ -282,9 +281,8 @@ const (
GROUP BY command,state GROUP BY command,state
ORDER BY null` ORDER BY null`
infoSchemaUserStatisticsQuery = ` infoSchemaUserStatisticsQuery = `
SELECT *,count(*) SELECT *
FROM information_schema.user_statistics FROM information_schema.user_statistics`
GROUP BY user`
infoSchemaAutoIncQuery = ` infoSchemaAutoIncQuery = `
SELECT table_schema, table_name, column_name, auto_increment, SELECT table_schema, table_name, column_name, auto_increment,
CAST(pow(2, case data_type CAST(pow(2, case data_type
@ -761,103 +759,6 @@ func (m *Mysql) gatherGlobalStatuses(db *sql.DB, serv string, acc telegraf.Accum
if len(fields) > 0 { if len(fields) > 0 {
acc.AddFields("mysql", fields, tags) acc.AddFields("mysql", fields, tags)
} }
// gather connection metrics from processlist for each user
if m.GatherProcessList {
conn_rows, err := db.Query("SELECT user, sum(1) FROM INFORMATION_SCHEMA.PROCESSLIST GROUP BY user")
if err != nil {
log.Printf("E! MySQL Error gathering process list: %s", err)
} else {
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{})
if err != nil {
return err
}
fields["connections"] = connections
acc.AddFields("mysql_users", fields, tags)
}
}
}
// gather connection metrics from user_statistics for each user
if m.GatherUserStatistics {
conn_rows, err := db.Query("select 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 FROM INFORMATION_SCHEMA.USER_STATISTICS GROUP BY user")
if err != nil {
log.Printf("E! MySQL Error gathering user stats: %s", err)
} else {
for conn_rows.Next() {
var user string
var total_connections int64
var concurrent_connections int64
var connected_time int64
var busy_time int64
var cpu_time int64
var bytes_received int64
var bytes_sent int64
var binlog_bytes_written int64
var rows_fetched int64
var rows_updated int64
var table_rows_read int64
var select_commands int64
var update_commands int64
var other_commands int64
var commit_transactions int64
var rollback_transactions int64
var denied_connections int64
var lost_connections int64
var access_denied int64
var empty_queries int64
var total_ssl_connections int64
err = conn_rows.Scan(&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,
)
if err != nil {
return err
}
tags := map[string]string{"server": servtag, "user": user}
fields := map[string]interface{}{
"total_connections": total_connections,
"concurrent_connections": concurrent_connections,
"connected_time": connected_time,
"busy_time": busy_time,
"cpu_time": cpu_time,
"bytes_received": bytes_received,
"bytes_sent": bytes_sent,
"binlog_bytes_written": binlog_bytes_written,
"rows_fetched": rows_fetched,
"rows_updated": rows_updated,
"table_rows_read": table_rows_read,
"select_commands": select_commands,
"update_commands": update_commands,
"other_commands": other_commands,
"commit_transactions": commit_transactions,
"rollback_transactions": rollback_transactions,
"denied_connections": denied_connections,
"lost_connections": lost_connections,
"access_denied": access_denied,
"empty_queries": empty_queries,
"total_ssl_connections": total_ssl_connections,
}
acc.AddFields("mysql_user_stats", fields, tags)
}
}
}
return nil return nil
} }
@ -908,6 +809,29 @@ func (m *Mysql) GatherProcessListStatuses(db *sql.DB, serv string, acc telegraf.
} else { } else {
acc.AddFields("mysql_process_list", fields, tags) 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 return nil
} }
@ -917,77 +841,190 @@ func (m *Mysql) GatherUserStatisticsStatuses(db *sql.DB, serv string, acc telegr
// run query // run query
rows, err := db.Query(infoSchemaUserStatisticsQuery) rows, err := db.Query(infoSchemaUserStatisticsQuery)
if err != nil { 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 return err
} }
defer rows.Close() defer rows.Close()
var (
user string cols, err := columnsToLower(rows.Columns())
total_connections int64 if err != nil {
concurrent_connections int64 return err
connected_time int64 }
busy_time int64
cpu_time int64 read, err := getColSlice(len(cols))
bytes_received int64 if err != nil {
bytes_sent int64 return err
binlog_bytes_written int64 }
rows_fetched int64
rows_updated int64
table_rows_read 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
count uint32
)
servtag := getDSNTag(serv) servtag := getDSNTag(serv)
for rows.Next() { for rows.Next() {
err = rows.Scan(&user, &total_connections, &concurrent_connections, err = rows.Scan(read...)
&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, &count,
)
if err != nil { if err != nil {
return err return err
} }
tags := map[string]string{"server": servtag, "user": user} tags := map[string]string{"server": servtag, "user": *read[0].(*string)}
fields := map[string]interface{}{ fields := map[string]interface{}{}
"total_connections": total_connections, for i := range cols {
"concurrent_connections": concurrent_connections, if i == 0 {
"connected_time": connected_time, continue // skip "user"
"busy_time": busy_time, }
"cpu_time": cpu_time, switch v := read[i].(type) {
"bytes_received": bytes_received, case *int64:
"bytes_sent": bytes_sent, fields[cols[i]] = *v
"binlog_bytes_written": binlog_bytes_written, case *float64:
"rows_fetched": rows_fetched, fields[cols[i]] = *v
"rows_updated": rows_updated, case *string:
"table_rows_read": table_rows_read, fields[cols[i]] = *v
"select_commands": select_commands, default:
"update_commands": update_commands, return fmt.Errorf("Unknown column type - %T", v)
"other_commands": other_commands, }
"commit_transactions": commit_transactions,
"rollback_transactions": rollback_transactions,
"denied_connections": denied_connections,
"lost_connections": lost_connections,
"access_denied": access_denied,
"empty_queries": empty_queries,
"total_ssl_connections": total_ssl_connections,
} }
acc.AddFields("mysql_user_stats", fields, tags) acc.AddFields("mysql_user_stats", fields, tags)
} }
return nil 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 // gatherPerfTableIOWaits can be used to get total count and time
// of I/O wait event for each table and process // of I/O wait event for each table and process
func (m *Mysql) gatherPerfTableIOWaits(db *sql.DB, serv string, acc telegraf.Accumulator) error { func (m *Mysql) gatherPerfTableIOWaits(db *sql.DB, serv string, acc telegraf.Accumulator) error {