[8.x](backport #40968) Restore docker.network.in.* and docker.network.out.* fields in docker module

CHANGELOG.next.asciidoc

@@ -338,6 +338,7 @@ https://github.com/elastic/beats/compare/v8.8.1\...main[Check the HEAD diff]
 - Add `metrics_count` to Prometheus module if `metrics_count: true` is set. {pull}40411[40411]
 - Added Cisco Meraki module {pull}40836[40836]
 - Added Palo Alto Networks module {pull}40686[40686]
+- Restore docker.network.in.* and docker.network.out.* fields in docker module {pull}40968[40968]
 
 *Metricbeat*
 

metricbeat/docs/fields.asciidoc

@@ -14500,6 +14500,104 @@ type: keyword
 
 --
 
+[float]
+=== in
+
+Incoming network stats per second.
+
+
+
+*`docker.network.in.bytes`*::
++
+--
+Incoming bytes per seconds.
+
+
+type: long
+
+format: bytes
+
+--
+
+*`docker.network.in.dropped`*::
++
+--
+Dropped incoming packets per second.
+
+
+type: scaled_float
+
+--
+
+*`docker.network.in.errors`*::
++
+--
+Errors on incoming packets per second.
+
+
+type: long
+
+--
+
+*`docker.network.in.packets`*::
++
+--
+Incoming packets per second.
+
+
+type: long
+
+--
+
+[float]
+=== out
+
+Outgoing network stats per second.
+
+
+
+*`docker.network.out.bytes`*::
++
+--
+Outgoing bytes per second.
+
+
+type: long
+
+format: bytes
+
+--
+
+*`docker.network.out.dropped`*::
++
+--
+Dropped outgoing packets per second.
+
+
+type: scaled_float
+
+--
+
+*`docker.network.out.errors`*::
++
+--
+Errors on outgoing packets per second.
+
+
+type: long
+
+--
+
+*`docker.network.out.packets`*::
++
+--
+Outgoing packets per second.
+
+
+type: long
+
+--
+
 [float]
 === inbound
 

metricbeat/module/docker/network/_meta/fields.yml

@@ -9,6 +9,50 @@
       type: keyword
       description: >
         Network interface name.
+    - name: in
+      type: group
+      description: >
+        Incoming network stats per second.
+      fields:
+        - name: bytes
+          type: long
+          format: bytes
+          description: >
+            Incoming bytes per seconds.
+        - name: dropped
+          type: scaled_float
+          description: >
+            Dropped incoming packets per second.
+        - name: errors
+          type: long
+          description: >
+            Errors on incoming packets per second.
+        - name: packets
+          type: long
+          description: >
+            Incoming packets per second.
+    - name: out
+      type: group
+      description: >
+        Outgoing network stats per second.
+      fields:
+        - name: bytes
+          type: long
+          format: bytes
+          description: >
+            Outgoing bytes per second.
+        - name: dropped
+          type: scaled_float
+          description: >
+            Dropped outgoing packets per second.
+        - name: errors
+          type: long
+          description: >
+            Errors on outgoing packets per second.
+        - name: packets
+          type: long
+          description: >
+            Outgoing packets per second.
     - name: inbound
       type: group
       description: >

metricbeat/module/docker/network/data.go

@@ -37,6 +37,18 @@ func eventMapping(r mb.ReporterV2, stats *NetStats) {
 		RootFields: rootFields,
 		MetricSetFields: mapstr.M{
 			"interface": stats.NameInterface,
+			"in": mapstr.M{
+				"bytes":   stats.RxBytes,
+				"dropped": stats.RxDropped,
+				"errors":  stats.RxErrors,
+				"packets": stats.RxPackets,
+			},
+			"out": mapstr.M{
+				"bytes":   stats.TxBytes,
+				"dropped": stats.TxDropped,
+				"errors":  stats.TxErrors,
+				"packets": stats.TxPackets,
+			},
 			"inbound": mapstr.M{
 				"bytes":   stats.Total.RxBytes,
 				"dropped": stats.Total.RxDropped,

metricbeat/module/docker/network/helper.go

@@ -99,7 +99,9 @@ func (n *NetService) getNetworkStats(nameInterface string, rawNetStats types.Net
 		netStats.TxErrors = n.getTxErrorsPerSecond(&newNetworkStats, &oldNetworkStat)
 		netStats.TxPackets = n.getTxPacketsPerSecond(&newNetworkStats, &oldNetworkStat)
 	} else {
-		n.NetworkStatPerContainer[myRawstats.Container.ID] = make(map[string]NetRaw)
+		if _, conExists := n.NetworkStatPerContainer[myRawstats.Container.ID]; !conExists {
+			n.NetworkStatPerContainer[myRawstats.Container.ID] = make(map[string]NetRaw)
+		}
 	}
 
 	n.NetworkStatPerContainer[myRawstats.Container.ID][nameInterface] = newNetworkStats
@@ -121,13 +123,6 @@ func createNetRaw(time time.Time, stats *types.NetworkStats) NetRaw {
 	}
 }
 
-func (n *NetService) checkStats(containerID string, nameInterface string) bool {
-	if _, exist := n.NetworkStatPerContainer[containerID][nameInterface]; exist {
-		return true
-	}
-	return false
-}
-
 func (n *NetService) getRxBytesPerSecond(newStats *NetRaw, oldStats *NetRaw) float64 {
 	duration := newStats.Time.Sub(oldStats.Time)
 	return n.calculatePerSecond(duration, oldStats.RxBytes, newStats.RxBytes)