[receiver/mysql]: add mysql.uptime metric

.chloggen/drosiek-upstream-metric.yaml

@@ -0,0 +1,16 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: mysqlreceiver
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: add mysql.uptime metric
+
+# One or more tracking issues related to the change
+issues: [14138]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:

receiver/mysqlreceiver/documentation.md

@@ -356,6 +356,14 @@ The number of created temporary resources.
 | ---- | ----------- | ------ |
 | resource | The kind of temporary resources. | Str: ``disk_tables``, ``files``, ``tables`` |
 
+### mysql.uptime
+
+The number of seconds that the server has been up.
+
+| Unit | Metric Type | Value Type | Aggregation Temporality | Monotonic |
+| ---- | ----------- | ---------- | ----------------------- | --------- |
+| s | Sum | Int | Cumulative | true |
+
 ## Optional Metrics
 
 The following metrics are not emitted by default. Each of them can be enabled by applying the following configuration:

receiver/mysqlreceiver/internal/metadata/testdata/config.yaml

@@ -87,6 +87,8 @@ all_set:
       enabled: true
     mysql.tmp_resources:
       enabled: true
+    mysql.uptime:
+      enabled: true
   resource_attributes:
     mysql.instance.endpoint:
       enabled: true
@@ -178,6 +180,8 @@ none_set:
       enabled: false
     mysql.tmp_resources:
       enabled: false
+    mysql.uptime:
+      enabled: false
   resource_attributes:
     mysql.instance.endpoint:
       enabled: false

receiver/mysqlreceiver/metadata.yaml

@@ -398,6 +398,15 @@ metrics:
       monotonic: true
       aggregation: cumulative
     attributes: [opened_resources]
+  mysql.uptime:
+    enabled: true
+    description: The number of seconds that the server has been up.
+    unit: s
+    sum:
+      value_type: int
+      input_type: string
+      monotonic: true
+      aggregation: cumulative
   mysql.table.lock_wait.read.count:
     enabled: false
     description: The total table lock wait read events.

receiver/mysqlreceiver/scraper.go

@@ -395,6 +395,10 @@ func (m *mySQLScraper) scrapeGlobalStats(now pcommon.Timestamp, errs *scrapererr
 			addPartialIfError(errs, m.mb.RecordMysqlMysqlxConnectionsDataPoint(now, v, metadata.AttributeConnectionStatusClosed))
 		case "Mysqlx_connections_rejected":
 			addPartialIfError(errs, m.mb.RecordMysqlMysqlxConnectionsDataPoint(now, v, metadata.AttributeConnectionStatusRejected))
+
+		// uptime
+		case "Uptime":
+			addPartialIfError(errs, m.mb.RecordMysqlUptimeDataPoint(now, v))
 		}
 	}
 }

receiver/mysqlreceiver/testdata/integration/expected.yaml

@@ -675,6 +675,16 @@ resourceMetrics:
                   timeUnixNano: "1674545265375344000"
               isMonotonic: true
             unit: "1"
+          - description: The number of seconds that the server has been up.
+            name: mysql.uptime
+            sum:
+              aggregationTemporality: 2
+              dataPoints:
+                - asInt: "452"
+                  startTimeUnixNano: "1644862687825728000"
+                  timeUnixNano: "1644862687825772000"
+              isMonotonic: true
+            unit: "s"
         scope:
           name: otelcol/mysqlreceiver
           version: latest

receiver/mysqlreceiver/testdata/scraper/expected.yaml

@@ -1657,6 +1657,16 @@ resourceMetrics:
                   timeUnixNano: "1644862687825772000"
               isMonotonic: true
             unit: "1"
+          - description: The number of seconds that the server has been up.
+            name: mysql.uptime
+            sum:
+              aggregationTemporality: 2
+              dataPoints:
+                - asInt: "452"
+                  startTimeUnixNano: "1644862687825728000"
+                  timeUnixNano: "1644862687825772000"
+              isMonotonic: true
+            unit: "s"
         scope:
           name: otelcol/mysqlreceiver
           version: latest