swarm: implement blackhole detection (#2320)

* swarm: implement blackhole detection

* address review comments

Author: sukunrt

dashboards/swarm/swarm.json

@@ -35,6 +35,18 @@
       "name": "Prometheus",
       "version": "1.0.0"
     },
+    {
+      "type": "panel",
+      "id": "stat",
+      "name": "Stat",
+      "version": ""
+    },
+    {
+      "type": "panel",
+      "id": "state-timeline",
+      "name": "State timeline",
+      "version": ""
+    },
     {
       "type": "panel",
       "id": "timeseries",
@@ -3026,8 +3038,248 @@
       ],
       "title": "Dials per connection",
       "type": "piechart"
+    },
+    {
+      "collapsed": false,
+      "gridPos": {
+        "h": 1,
+        "w": 24,
+        "x": 0,
+        "y": 84
+      },
+      "id": 44,
+      "panels": [],
+      "title": "Black Hole Detection",
+      "type": "row"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${DS_PROMETHEUS}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "fixed"
+          },
+          "custom": {
+            "fillOpacity": 76,
+            "lineWidth": 0,
+            "spanNulls": true
+          },
+          "mappings": [
+            {
+              "options": {
+                "0": {
+                  "color": "blue",
+                  "index": 0,
+                  "text": "Probing"
+                },
+                "1": {
+                  "color": "green",
+                  "index": 1,
+                  "text": "Allowed"
+                },
+                "2": {
+                  "color": "purple",
+                  "index": 2,
+                  "text": "Blocked"
+                }
+              },
+              "type": "value"
+            }
+          ],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              }
+            ]
+          }
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 6,
+        "w": 24,
+        "x": 0,
+        "y": 85
+      },
+      "id": 46,
+      "options": {
+        "alignValue": "center",
+        "legend": {
+          "displayMode": "list",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "mergeValues": true,
+        "rowHeight": 0.9,
+        "showValue": "always",
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "editorMode": "code",
+          "expr": "libp2p_swarm_black_hole_filter_state{instance=~\"$instance\"}",
+          "legendFormat": "{{instance}} {{name}}",
+          "range": true,
+          "refId": "A"
+        }
+      ],
+      "title": "Black Hole Filter State",
+      "type": "state-timeline"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${DS_PROMETHEUS}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "fixedColor": "purple",
+            "mode": "fixed"
+          },
+          "mappings": [
+            {
+              "options": {
+                "0": {
+                  "index": 0,
+                  "text": "-"
+                }
+              },
+              "type": "value"
+            }
+          ],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              }
+            ]
+          }
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 7,
+        "w": 12,
+        "x": 0,
+        "y": 91
+      },
+      "id": 49,
+      "options": {
+        "colorMode": "value",
+        "graphMode": "none",
+        "justifyMode": "auto",
+        "orientation": "horizontal",
+        "reduceOptions": {
+          "calcs": [
+            "lastNotNull"
+          ],
+          "fields": "",
+          "values": false
+        },
+        "textMode": "value_and_name"
+      },
+      "pluginVersion": "9.3.6",
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "editorMode": "code",
+          "expr": "libp2p_swarm_black_hole_filter_next_request_allowed_after{instance=~\"$instance\"}",
+          "legendFormat": "{{instance}}: {{name}}",
+          "range": true,
+          "refId": "A"
+        }
+      ],
+      "title": "Black Hole Filter Requests Till Next Probe",
+      "type": "stat"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${DS_PROMETHEUS}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "thresholds"
+          },
+          "mappings": [],
+          "max": 10,
+          "min": 0,
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "purple",
+                "value": null
+              },
+              {
+                "color": "green",
+                "value": 5
+              }
+            ]
+          }
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 7,
+        "w": 12,
+        "x": 12,
+        "y": 91
+      },
+      "id": 47,
+      "options": {
+        "orientation": "vertical",
+        "reduceOptions": {
+          "calcs": [
+            "lastNotNull"
+          ],
+          "fields": "",
+          "values": false
+        },
+        "showThresholdLabels": false,
+        "showThresholdMarkers": true
+      },
+      "pluginVersion": "9.3.6",
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "editorMode": "code",
+          "exemplar": false,
+          "expr": "libp2p_swarm_black_hole_filter_success_fraction{instance=~\"$instance\"} * 100",
+          "instant": true,
+          "legendFormat": "{{instance}} {{name}}",
+          "range": false,
+          "refId": "A"
+        }
+      ],
+      "title": "Black Hole Filter Success Percentage",
+      "type": "gauge"
     }
   ],
+  "refresh": false,
   "schemaVersion": 37,
   "style": "dark",
   "tags": [],
@@ -3075,6 +3327,6 @@
   "timezone": "",
   "title": "libp2p Swarm",
   "uid": "a15PyhO4z",
-  "version": 6,
+  "version": 7,
   "weekStart": ""
 }