refactor(metrics): unify process sampling and split network IO (#2590)

.docker/observability/grafana/dashboards/rustfs.json

@@ -2641,7 +2641,7 @@
       },
       "gridPos": {
         "h": 7,
-        "w": 24,
+        "w": 12,
         "x": 0,
         "y": 73
       },
@@ -2670,7 +2670,7 @@
             "uid": "${datasource}"
           },
           "editorMode": "code",
-          "expr": "sum by (job) (rate(rustfs_system_process_network_io{job=~\"$job\", direction=\"received\"}[5m]))",
+          "expr": "sum by (job) (rate(rustfs_system_network_host_network_io{job=~\"$job\", direction=\"received\"}[5m]))",
           "legendFormat": "RX - {{job}}",
           "range": true,
           "refId": "C"
@@ -2681,7 +2681,7 @@
             "uid": "${datasource}"
           },
           "editorMode": "code",
-          "expr": "sum by (job) (rate(rustfs_system_process_network_io{job=~\"$job\", direction=\"transmitted\"}[5m]))",
+          "expr": "sum by (job) (rate(rustfs_system_network_host_network_io{job=~\"$job\", direction=\"transmitted\"}[5m]))",
           "legendFormat": "TX - {{job}}",
           "range": true,
           "refId": "D"
@@ -2690,6 +2690,115 @@
       "title": "Network",
       "type": "timeseries"
     },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${datasource}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisBorderShow": false,
+            "axisCenteredZero": false,
+            "axisColorMode": "text",
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "barWidthFactor": 0.6,
+            "drawStyle": "line",
+            "fillOpacity": 10,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "viz": false
+            },
+            "insertNulls": false,
+            "lineInterpolation": "smooth",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "never",
+            "showValues": false,
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": 0
+              }
+            ]
+          },
+          "unit": "Bps"
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 7,
+        "w": 12,
+        "x": 12,
+        "y": 73
+      },
+      "id": 500,
+      "options": {
+        "legend": {
+          "calcs": [
+            "lastNotNull",
+            "max"
+          ],
+          "displayMode": "table",
+          "placement": "right",
+          "showLegend": true
+        },
+        "tooltip": {
+          "hideZeros": false,
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "pluginVersion": "12.3.2",
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${datasource}"
+          },
+          "editorMode": "code",
+          "expr": "sum by (job, interface) (rate(rustfs_system_network_host_network_io_per_interface{job=~\"$job\", direction=\"received\"}[5m]))",
+          "legendFormat": "RX {{interface}} - {{job}}",
+          "range": true,
+          "refId": "E"
+        },
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${datasource}"
+          },
+          "editorMode": "code",
+          "expr": "sum by (job, interface) (rate(rustfs_system_network_host_network_io_per_interface{job=~\"$job\", direction=\"transmitted\"}[5m]))",
+          "legendFormat": "TX {{interface}} - {{job}}",
+          "range": true,
+          "refId": "F"
+        }
+      ],
+      "title": "Network by Interface",
+      "type": "timeseries"
+    },
     {
       "datasource": {
         "type": "prometheus",