| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package mysql |
| 4 | |
| 5 | import ( |
| 6 | "context" |
| 7 | |
| 8 | "github.com/blang/semver/v4" |
| 9 | ) |
| 10 | |
| 11 | const ( |
| 12 | queryShowReplicaStatus = "SHOW REPLICA STATUS;" |
| 13 | queryShowSlaveStatus = "SHOW SLAVE STATUS;" |
| 14 | queryShowAllSlavesStatus = "SHOW ALL SLAVES STATUS;" |
| 15 | ) |
| 16 | |
| 17 | func (c *Collector) collectSlaveStatus(ctx context.Context) error { |
| 18 | // https://mariadb.com/docs/reference/es/sql-statements/SHOW_ALL_SLAVES_STATUS/ |
| 19 | mariaDBMinVer := semver.Version{Major: 10, Minor: 2, Patch: 0} |
| 20 | mysqlMinVer := semver.Version{Major: 8, Minor: 0, Patch: 22} |
| 21 | var q string |
| 22 | if c.isMariaDB && c.version.GTE(mariaDBMinVer) { |
| 23 | q = queryShowAllSlavesStatus |
| 24 | } else if !c.isMariaDB && c.version.GTE(mysqlMinVer) { |
| 25 | q = queryShowReplicaStatus |
| 26 | } else { |
| 27 | q = queryShowSlaveStatus |
| 28 | } |
| 29 | c.Debugf("executing query: '%s'", q) |
| 30 | |
| 31 | type slaveStatusRow struct { |
| 32 | name string |
| 33 | behindMaster int64 |
| 34 | sqlRunning int64 |
| 35 | ioRunning int64 |
| 36 | } |
| 37 | row := slaveStatusRow{} |
| 38 | |
| 39 | _, err := c.collectQuery(ctx, q, func(column, value string, lineEnd bool) { |
| 40 | switch column { |
| 41 | case "Connection_name", "Channel_Name": |
| 42 | row.name = value |
| 43 | case "Seconds_Behind_Master", "Seconds_Behind_Source": |
| 44 | row.behindMaster = parseInt(value) |
| 45 | case "Slave_SQL_Running", "Replica_SQL_Running": |
| 46 | row.sqlRunning = parseInt(convertSlaveSQLRunning(value)) |
| 47 | case "Slave_IO_Running", "Replica_IO_Running": |
| 48 | row.ioRunning = parseInt(convertSlaveIORunning(value)) |
| 49 | } |
| 50 | if lineEnd { |
| 51 | c.mx.setReplication("seconds_behind_master", row.name, row.behindMaster) |
| 52 | c.mx.setReplication("slave_sql_running", row.name, row.sqlRunning) |
| 53 | c.mx.setReplication("slave_io_running", row.name, row.ioRunning) |
| 54 | |
| 55 | // Explicit row reset keeps per-row lifecycle obvious in callback flow. |
| 56 | row = slaveStatusRow{} |
| 57 | } |
| 58 | }) |
| 59 | return err |
| 60 | } |
| 61 | |
| 62 | func convertSlaveSQLRunning(value string) string { |
| 63 | switch value { |
| 64 | case "Yes": |
| 65 | return "1" |
| 66 | default: |
| 67 | return "0" |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | func convertSlaveIORunning(value string) string { |
| 72 | // NOTE: There is 'Connecting' state and probably others |
| 73 | switch value { |
| 74 | case "Yes": |
| 75 | return "1" |
| 76 | default: |
| 77 | return "0" |
| 78 | } |
| 79 | } |