Add support for SQL Errors counter

collector/mssql.go

@@ -91,7 +91,7 @@ func mssqlBuildWMIInstanceClass(suffix string, instance string) string {
 type mssqlCollectorsMap map[string]mssqlCollectorFunc
 
 func mssqlAvailableClassCollectors() string {
-	return "accessmethods,availreplica,bufman,databases,dbreplica,genstats,locks,memmgr,sqlstats"
+	return "accessmethods,availreplica,bufman,databases,dbreplica,genstats,locks,memmgr,sqlstats,sqlerrors"
 }
 
 func (c *MSSQLCollector) getMSSQLCollectors() mssqlCollectorsMap {
@@ -105,6 +105,7 @@ func (c *MSSQLCollector) getMSSQLCollectors() mssqlCollectorsMap {
 	mssqlCollectors["locks"] = c.collectLocks
 	mssqlCollectors["memmgr"] = c.collectMemoryManager
 	mssqlCollectors["sqlstats"] = c.collectSQLStats
+	mssqlCollectors["sqlerrors"] = c.collectSQLErrors
 
 	return mssqlCollectors
 }
@@ -358,6 +359,9 @@ type MSSQLCollector struct {
 	SQLStatsSQLReCompilations       *prometheus.Desc
 	SQLStatsUnsafeAutoParams        *prometheus.Desc
 
+	// Win32_PerfRawData_{instance}_SQLServerSQLErrors
+	SQLErrorsTotal                  *prometheus.Desc
+
 	mssqlInstances             mssqlInstancesType
 	mssqlCollectors            mssqlCollectorsMap
 	mssqlChildCollectorFailure int
@@ -1637,6 +1641,14 @@ func NewMSSQLCollector() (Collector, error) {
 			nil,
 		),
 
+		// Win32_PerfRawData_{instance}_SQLServerSQLErrors
+		SQLErrorsTotal: prometheus.NewDesc(
+			prometheus.BuildFQName(Namespace, subsystem, "sql_errors_total"),
+			"(SQLErrors.Total)",
+			[]string{"instance", "resource"},
+			nil,
+		),
+
 		mssqlInstances: getMSSQLInstances(),
 	}
 
@@ -3558,3 +3570,34 @@ func (c *MSSQLCollector) collectSQLStats(ch chan<- prometheus.Metric, sqlInstanc
 
 	return nil, nil
 }
+
+type win32PerfRawDataSQLServerSQLErrors struct {
+	Name      string
+	Errorssec uint64
+}
+
+// Win32_PerfRawData_MSSQLSERVER_SQLServerErrors docs:
+// - https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-sql-errors-object
+func (c *MSSQLCollector) collectSQLErrors(ch chan<- prometheus.Metric, sqlInstance string) (*prometheus.Desc, error) {
+	var dst []win32PerfRawDataSQLServerSQLErrors
+	log.Debugf("mssql_sqlerrors collector iterating sql instance %s.", sqlInstance)
+
+	class := mssqlBuildWMIInstanceClass("SQLErrors", sqlInstance)
+	q := queryAllForClassWhere(&dst, class, `Name <> '_Total'`)
+	if err := wmi.Query(q, &dst); err != nil {
+		return nil, err
+	}
+
+	for _, v := range dst {
+		resource := v.Name
+
+		ch <- prometheus.MustNewConstMetric(
+			c.SQLErrorsTotal,
+			prometheus.CounterValue,
+			float64(v.Errorssec),
+			sqlInstance, resource,
+		)
+	}
+
+	return nil, nil
+}

docs/collector.mssql.md

@@ -5,14 +5,14 @@ The mssql collector exposes metrics about the MSSQL server
 |||
 -|-
 Metric name prefix  | `mssql`
-Classes             | [`Win32_PerfRawData_MSSQLSERVER_SQLServerAccessMethods`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-access-methods-object)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerAvailabilityReplica`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-availability-replica)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerBufferManager`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-buffer-manager-object)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerDatabaseReplica`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-database-replica)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerDatabases`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-databases-object?view=sql-server-2017)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerGeneralStatistics`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-general-statistics-object)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerLocks`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-locks-object)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerMemoryManager`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-memory-manager-object)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerSQLStatistics`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-sql-statistics-object)
+Classes             | [`Win32_PerfRawData_MSSQLSERVER_SQLServerAccessMethods`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-access-methods-object)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerAvailabilityReplica`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-availability-replica)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerBufferManager`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-buffer-manager-object)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerDatabaseReplica`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-database-replica)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerDatabases`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-databases-object?view=sql-server-2017)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerGeneralStatistics`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-general-statistics-object)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerLocks`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-locks-object)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerMemoryManager`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-memory-manager-object)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerSQLStatistics`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-sql-statistics-object)<br/>[`Win32_PerfRawData_MSSQLSERVER_SQLServerSQLErrors`](https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-sql-errors-object)
 Enabled by default? | No
 
 ## Flags
 
 ### `--collectors.mssql.classes-enabled`
 
-Comma-separated list of MSSQL WMI classes to use. Supported values are `accessmethods`, `availreplica`, `bufman`, `databases`, `dbreplica`, `genstats`, `locks`, `memmgr` and `sqlstats`.
+Comma-separated list of MSSQL WMI classes to use. Supported values are `accessmethods`, `availreplica`, `bufman`, `databases`, `dbreplica`, `genstats`, `locks`, `memmgr`, `sqlstats` and `sqlerrors`.
 
 ### `--collectors.mssql.class-print`
 
@@ -230,6 +230,7 @@ Name | Description | Type | Labels
 `wmi_mssql_sqlstats_sql_compilations` | _Not yet documented_ | counter | `instance`
 `wmi_mssql_sqlstats_sql_recompilations` | _Not yet documented_ | counter | `instance`
 `wmi_mssql_sqlstats_unsafe_auto_parameterization_attempts` | _Not yet documented_ | counter | `instance`
+`wmi_mssql_sql_errors_total` | _Not yet documented_ | counter | `instance`, `resource`
 
 ### Example metric
 _This collector does not yet have explained examples, we would appreciate your help adding them!_