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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,208 @@ | ||
| package mysql | ||
|
|
||
| import ( | ||
| "context" | ||
| "database/sql" | ||
| "github.com/coroot/coroot-cluster-agent/common" | ||
| "strconv" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/coroot/logger" | ||
| _ "github.com/go-sql-driver/mysql" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| ) | ||
|
|
||
| const ( | ||
| picoSeconds = 1e12 | ||
| ) | ||
|
|
||
| var ( | ||
| dUp = common.Desc("mysql_up", "") | ||
| dScrapeError = common.Desc("mysql_scrape_error", "", "error", "warning") | ||
| dInfo = common.Desc("mysql_info", "", "server_version", "server_id", "server_uuid") | ||
|
|
||
| dQueryCalls = common.Desc("mysql_top_query_calls_per_second", "", "schema", "query") | ||
| dQueryTotalTime = common.Desc("mysql_top_query_time_per_second", "", "schema", "query") | ||
| dQueryLockTime = common.Desc("mysql_top_query_lock_time_per_second", "", "schema", "query") | ||
|
|
||
| dReplicationIORunning = common.Desc("mysql_replication_io_status", "", "source_server_id", "source_server_uuid", "state", "last_error") | ||
| dReplicationSQLRunning = common.Desc("mysql_replication_sql_status", "", "source_server_id", "source_server_uuid", "state", "last_error") | ||
| dReplicationLag = common.Desc("mysql_replication_lag_seconds", "", "source_server_id", "source_server_uuid") | ||
|
|
||
| dConnectionsMax = common.Desc("mysql_connections_max", "") | ||
| dConnectionsCurrent = common.Desc("mysql_connections_current", "") | ||
| dConnectionsTotal = common.Desc("mysql_connections_total", "") | ||
| dConnectionsAborted = common.Desc("mysql_connections_aborted_total", "") | ||
|
|
||
| dBytesReceived = common.Desc("mysql_traffic_received_bytes_total", "") | ||
| dBytesSent = common.Desc("mysql_traffic_sent_bytes_total", "") | ||
|
|
||
| dQueries = common.Desc("mysql_queries_total", "") | ||
| dSlowQueries = common.Desc("mysql_slow_queries_total", "") | ||
|
|
||
| dIOTime = common.Desc("mysql_top_table_io_wait_time_per_second", "", "schema", "table", "operation") | ||
| ) | ||
|
|
||
| type Collector struct { | ||
| host string | ||
| db *sql.DB | ||
| logger logger.Logger | ||
| topN int | ||
| cancelFunc context.CancelFunc | ||
| lock sync.RWMutex | ||
| scrapeErrors map[string]bool | ||
|
|
||
| globalVariables map[string]string | ||
| globalStatus map[string]string | ||
| perfschemaPrev *statementsSummarySnapshot | ||
| perfschemaCurr *statementsSummarySnapshot | ||
| replicaStatuses []*ReplicaStatus | ||
| ioByTablePrev *ioByTableSnapshot | ||
| ioByTableCurr *ioByTableSnapshot | ||
|
|
||
| invalidQueries map[string]bool | ||
| } | ||
|
|
||
| func New(dsn string, logger logger.Logger, scrapeInterval time.Duration) (*Collector, error) { | ||
| ctx, cancelFunc := context.WithCancel(context.Background()) | ||
| c := &Collector{ | ||
| logger: logger, | ||
| cancelFunc: cancelFunc, | ||
| globalStatus: map[string]string{}, | ||
| globalVariables: map[string]string{}, | ||
| invalidQueries: map[string]bool{}, | ||
| } | ||
| var err error | ||
| c.db, err = sql.Open("mysql", dsn) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| c.db.SetMaxOpenConns(1) | ||
| if err := c.db.Ping(); err != nil { | ||
| c.logger.Warning("probe failed:", err) | ||
| } | ||
| go func() { | ||
| ticker := time.NewTicker(scrapeInterval) | ||
| c.snapshot() | ||
| for { | ||
| select { | ||
| case <-ticker.C: | ||
| c.snapshot() | ||
| case <-ctx.Done(): | ||
| c.logger.Info("stopping mysql collector") | ||
| return | ||
| } | ||
| } | ||
| }() | ||
|
|
||
| return c, nil | ||
| } | ||
|
|
||
| func (c *Collector) Close() error { | ||
| c.cancelFunc() | ||
| return c.db.Close() | ||
| } | ||
|
|
||
| func (c *Collector) Collect(ch chan<- prometheus.Metric) { | ||
| if err := c.db.Ping(); err != nil { | ||
| c.logger.Warning("probe failed:", err) | ||
| ch <- common.Gauge(dUp, 0) | ||
| ch <- common.Gauge(dScrapeError, 1, err.Error(), "") | ||
| return | ||
| } | ||
| ch <- common.Gauge(dUp, 1) | ||
| c.lock.RLock() | ||
| defer c.lock.RUnlock() | ||
| if version := c.globalVariables["version"]; version != "" { | ||
| ch <- common.Gauge(dInfo, 1, version, c.globalVariables["server_id"], c.globalVariables["server_uuid"]) | ||
| } | ||
|
|
||
| if len(c.scrapeErrors) > 0 { | ||
| for e := range c.scrapeErrors { | ||
| ch <- common.Gauge(dScrapeError, 1, "", e) | ||
| } | ||
| } else { | ||
| ch <- common.Gauge(dScrapeError, 0, "", "") | ||
| } | ||
| c.queryMetrics(ch, 20) | ||
| c.ioMetrics(ch, 20) | ||
| c.replicationMetrics(ch) | ||
| metricFromVariable(ch, dConnectionsMax, "max_connections", prometheus.GaugeValue, c.globalVariables) | ||
| metricFromVariable(ch, dConnectionsCurrent, "Threads_connected", prometheus.GaugeValue, c.globalStatus) | ||
| metricFromVariable(ch, dConnectionsTotal, "Connections", prometheus.CounterValue, c.globalStatus) | ||
| metricFromVariable(ch, dConnectionsAborted, "Aborted_connects", prometheus.CounterValue, c.globalStatus) | ||
| metricFromVariable(ch, dBytesReceived, "Bytes_received", prometheus.CounterValue, c.globalStatus) | ||
| metricFromVariable(ch, dBytesSent, "Bytes_sent", prometheus.CounterValue, c.globalStatus) | ||
| metricFromVariable(ch, dQueries, "Questions", prometheus.CounterValue, c.globalStatus) | ||
| metricFromVariable(ch, dSlowQueries, "Slow_queries", prometheus.CounterValue, c.globalStatus) | ||
| } | ||
|
|
||
| func (c *Collector) snapshot() { | ||
| c.lock.Lock() | ||
| defer c.lock.Unlock() | ||
|
|
||
| c.scrapeErrors = map[string]bool{} | ||
|
|
||
| if err := c.updateVariables("SHOW GLOBAL VARIABLES", c.globalVariables); err != nil { | ||
| c.logger.Warning(err) | ||
| c.scrapeErrors[err.Error()] = true | ||
| return | ||
| } | ||
| if err := c.updateVariables("SHOW GLOBAL STATUS", c.globalStatus); err != nil { | ||
| c.logger.Warning(err) | ||
| c.scrapeErrors[err.Error()] = true | ||
| return | ||
| } | ||
| if err := c.updateReplicationStatus(); err != nil { | ||
| c.logger.Warning(err) | ||
| c.scrapeErrors[err.Error()] = true | ||
| return | ||
| } | ||
| c.perfschemaPrev = c.perfschemaCurr | ||
| var err error | ||
| c.perfschemaCurr, err = c.queryStatementsSummary(c.perfschemaPrev) | ||
| if err != nil { | ||
| c.logger.Warning(err) | ||
| c.scrapeErrors[err.Error()] = true | ||
| return | ||
| } | ||
| c.ioByTablePrev = c.ioByTableCurr | ||
| c.ioByTableCurr, err = c.queryTableIOWaits() | ||
| if err != nil { | ||
| c.logger.Warning(err) | ||
| c.scrapeErrors[err.Error()] = true | ||
| return | ||
| } | ||
| } | ||
|
|
||
| func (c *Collector) Describe(ch chan<- *prometheus.Desc) { | ||
| ch <- dUp | ||
| ch <- dScrapeError | ||
| ch <- dInfo | ||
| ch <- dQueryCalls | ||
| ch <- dQueryTotalTime | ||
| ch <- dQueryLockTime | ||
| ch <- dReplicationIORunning | ||
| ch <- dReplicationSQLRunning | ||
| ch <- dReplicationLag | ||
| ch <- dConnectionsMax | ||
| ch <- dConnectionsCurrent | ||
| ch <- dConnectionsTotal | ||
| ch <- dConnectionsAborted | ||
| ch <- dBytesReceived | ||
| ch <- dBytesSent | ||
| ch <- dQueries | ||
| ch <- dSlowQueries | ||
| ch <- dIOTime | ||
| } | ||
|
|
||
| func metricFromVariable(ch chan<- prometheus.Metric, desc *prometheus.Desc, name string, typ prometheus.ValueType, variables map[string]string) { | ||
| v, ok := variables[name] | ||
| if !ok { | ||
| return | ||
| } | ||
| if f, err := strconv.ParseFloat(v, 64); err == nil { | ||
| ch <- prometheus.MustNewConstMetric(desc, typ, f) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| package mysql | ||
|
|
||
| import ( | ||
| "github.com/coroot/coroot-cluster-agent/common" | ||
| "sort" | ||
| "time" | ||
|
|
||
| "github.com/prometheus/client_golang/prometheus" | ||
| ) | ||
|
|
||
| type tableKey struct { | ||
| schema string | ||
| table string | ||
| } | ||
|
|
||
| type ioSummary struct { | ||
| readTotalTime uint64 | ||
| writeTotalTime uint64 | ||
| } | ||
|
|
||
| type ioByTableSnapshot struct { | ||
| ts time.Time | ||
| rows map[tableKey]ioSummary | ||
| } | ||
|
|
||
| func (c *Collector) queryTableIOWaits() (*ioByTableSnapshot, error) { | ||
| snapshot := &ioByTableSnapshot{ts: time.Now(), rows: map[tableKey]ioSummary{}} | ||
| q := ` | ||
| SELECT | ||
| OBJECT_SCHEMA, | ||
| OBJECT_NAME, | ||
| SUM_TIMER_READ, | ||
| SUM_TIMER_WRITE | ||
| FROM performance_schema.table_io_waits_summary_by_table | ||
| WHERE | ||
| OBJECT_SCHEMA is not null AND | ||
| OBJECT_NAME is not null` | ||
| rows, err := c.db.Query(q) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer rows.Close() | ||
|
|
||
| for rows.Next() { | ||
| var k tableKey | ||
| var r ioSummary | ||
| if err := rows.Scan(&k.schema, &k.table, &r.readTotalTime, &r.writeTotalTime); err != nil { | ||
| c.logger.Warning(err) | ||
| continue | ||
| } | ||
| snapshot.rows[k] = r | ||
| } | ||
| return snapshot, nil | ||
| } | ||
|
|
||
| type ioStats struct { | ||
| readTimePerSecond float64 | ||
| writeTimePerSecond float64 | ||
| totalTimePerSecond float64 | ||
| } | ||
|
|
||
| type ioStatsWithKey struct { | ||
| k tableKey | ||
| s *ioStats | ||
| } | ||
|
|
||
| func (c *Collector) ioMetrics(ch chan<- prometheus.Metric, n int) { | ||
| if c.ioByTablePrev == nil || c.ioByTableCurr == nil { | ||
| return | ||
| } | ||
| res := map[tableKey]*ioStats{} | ||
|
|
||
| withKeys := make([]ioStatsWithKey, 0, len(res)) | ||
|
|
||
| interval := c.ioByTableCurr.ts.Sub(c.ioByTablePrev.ts).Seconds() | ||
| for k, s := range c.ioByTableCurr.rows { | ||
| prev := c.ioByTablePrev.rows[k] | ||
| stats := &ioStats{} | ||
| if v := s.readTotalTime - prev.readTotalTime; v > 0 { | ||
| stats.readTimePerSecond = float64(v) / picoSeconds / interval | ||
| } | ||
| if v := s.writeTotalTime - prev.writeTotalTime; v > 0 { | ||
| stats.writeTimePerSecond = float64(v) / picoSeconds / interval | ||
| } | ||
| stats.totalTimePerSecond = stats.readTimePerSecond + stats.writeTimePerSecond | ||
| if stats.totalTimePerSecond > 0 { | ||
| withKeys = append(withKeys, ioStatsWithKey{k: k, s: stats}) | ||
| } | ||
| } | ||
| sort.Slice(withKeys, func(i, j int) bool { | ||
| return withKeys[i].s.totalTimePerSecond > withKeys[j].s.totalTimePerSecond | ||
| }) | ||
| if n > len(withKeys) { | ||
| n = len(withKeys) | ||
| } | ||
| for _, i := range withKeys[:n] { | ||
| ch <- common.Gauge(dIOTime, i.s.readTimePerSecond, i.k.schema, i.k.table, "read") | ||
| ch <- common.Gauge(dIOTime, i.s.writeTimePerSecond, i.k.schema, i.k.table, "write") | ||
| } | ||
|
|
||
| } |
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