{
  "uid": "cnx-dns",
  "title": "CNX DNS",
  "tags": ["dns", "knot", "cnx"],
  "timezone": "browser",
  "schemaVersion": 39,
  "version": 3,
  "refresh": "30s",
  "time": { "from": "now-6h", "to": "now" },
  "templating": { "list": [] },
  "annotations": { "list": [] },
  "panels": [
    {
      "type": "row",
      "title": "Alerts",
      "id": 11,
      "gridPos": { "h": 1, "w": 24, "x": 0, "y": 0 }
    },
    {
      "type": "table",
      "title": "Active alerts",
      "description": "Firing vmalert alerts (the ALERTS series vmalert writes back to VictoriaMetrics). An empty table means all clear.",
      "id": 12,
      "datasource": { "type": "prometheus", "uid": "victoriametrics" },
      "gridPos": { "h": 7, "w": 24, "x": 0, "y": 1 },
      "options": { "showHeader": true },
      "fieldConfig": {
        "defaults": { "custom": { "align": "auto" } },
        "overrides": []
      },
      "targets": [
        {
          "refId": "A",
          "datasource": { "type": "prometheus", "uid": "victoriametrics" },
          "expr": "ALERTS{alertstate=\"firing\"}",
          "format": "table",
          "instant": true
        }
      ],
      "transformations": [
        {
          "id": "organize",
          "options": {
            "excludeByName": {
              "Time": true,
              "Value": true,
              "__name__": true,
              "alertstate": true
            }
          }
        }
      ]
    },
    {
      "type": "row",
      "title": "DNS / Zones",
      "id": 1,
      "gridPos": { "h": 1, "w": 24, "x": 0, "y": 8 }
    },
    {
      "type": "table",
      "title": "Zone SOA serial (per nameserver)",
      "description": "ns1 and ns2 should report the same serial per zone. A divergence here is the secondary-out-of-sync condition.",
      "id": 2,
      "datasource": { "type": "prometheus", "uid": "victoriametrics" },
      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 9 },
      "options": { "showHeader": true },
      "fieldConfig": {
        "defaults": { "custom": { "align": "auto" } },
        "overrides": []
      },
      "targets": [
        {
          "refId": "A",
          "datasource": { "type": "prometheus", "uid": "victoriametrics" },
          "expr": "knot_zone_serial",
          "format": "table",
          "instant": true,
          "legendFormat": "{{zone}} @ {{instance}}"
        }
      ]
    },
    {
      "type": "timeseries",
      "title": "Seconds until zone expiry",
      "description": "On secondaries this counts down between successful transfers; a steady decline toward zero means transfers are failing.",
      "id": 3,
      "datasource": { "type": "prometheus", "uid": "victoriametrics" },
      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 9 },
      "fieldConfig": { "defaults": { "unit": "s" }, "overrides": [] },
      "targets": [
        {
          "refId": "A",
          "datasource": { "type": "prometheus", "uid": "victoriametrics" },
          "expr": "knot_zone_status_expiration",
          "legendFormat": "{{zone}} @ {{instance}}"
        }
      ]
    },
    {
      "type": "timeseries",
      "title": "Query rate by nameserver",
      "id": 4,
      "datasource": { "type": "prometheus", "uid": "victoriametrics" },
      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 17 },
      "fieldConfig": { "defaults": { "unit": "qps" }, "overrides": [] },
      "targets": [
        {
          "refId": "A",
          "datasource": { "type": "prometheus", "uid": "victoriametrics" },
          "expr": "sum by (instance) (rate(knot_stats_request_protocol_total[5m]))",
          "legendFormat": "{{instance}}"
        }
      ]
    },
    {
      "type": "timeseries",
      "title": "Response codes",
      "id": 5,
      "datasource": { "type": "prometheus", "uid": "victoriametrics" },
      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 17 },
      "fieldConfig": { "defaults": { "unit": "qps" }, "overrides": [] },
      "targets": [
        {
          "refId": "A",
          "datasource": { "type": "prometheus", "uid": "victoriametrics" },
          "expr": "sum by (type) (rate(knot_stats_response_code_total[5m]))",
          "legendFormat": "{{type}}"
        }
      ]
    },
    {
      "type": "row",
      "title": "Hosts",
      "id": 6,
      "gridPos": { "h": 1, "w": 24, "x": 0, "y": 25 }
    },
    {
      "type": "timeseries",
      "title": "CPU busy %",
      "id": 7,
      "datasource": { "type": "prometheus", "uid": "victoriametrics" },
      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 26 },
      "fieldConfig": {
        "defaults": { "unit": "percent", "min": 0, "max": 100 },
        "overrides": []
      },
      "targets": [
        {
          "refId": "A",
          "datasource": { "type": "prometheus", "uid": "victoriametrics" },
          "expr": "100 - (avg by (instance) (rate(node_cpu_seconds_total{mode=\"idle\"}[5m])) * 100)",
          "legendFormat": "{{instance}}"
        }
      ]
    },
    {
      "type": "timeseries",
      "title": "Memory used %",
      "id": 8,
      "datasource": { "type": "prometheus", "uid": "victoriametrics" },
      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 26 },
      "fieldConfig": {
        "defaults": { "unit": "percent", "min": 0, "max": 100 },
        "overrides": []
      },
      "targets": [
        {
          "refId": "A",
          "datasource": { "type": "prometheus", "uid": "victoriametrics" },
          "expr": "100 * (1 - node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes)",
          "legendFormat": "{{instance}}"
        }
      ]
    },
    {
      "type": "timeseries",
      "title": "Root filesystem used %",
      "id": 9,
      "datasource": { "type": "prometheus", "uid": "victoriametrics" },
      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 34 },
      "fieldConfig": {
        "defaults": { "unit": "percent", "min": 0, "max": 100 },
        "overrides": []
      },
      "targets": [
        {
          "refId": "A",
          "datasource": { "type": "prometheus", "uid": "victoriametrics" },
          "expr": "100 * (1 - node_filesystem_avail_bytes{mountpoint=\"/\",fstype!=\"tmpfs\"} / node_filesystem_size_bytes{mountpoint=\"/\",fstype!=\"tmpfs\"})",
          "legendFormat": "{{instance}}"
        }
      ]
    },
    {
      "type": "timeseries",
      "title": "Load average (1m)",
      "id": 10,
      "datasource": { "type": "prometheus", "uid": "victoriametrics" },
      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 34 },
      "fieldConfig": { "defaults": { "unit": "short" }, "overrides": [] },
      "targets": [
        {
          "refId": "A",
          "datasource": { "type": "prometheus", "uid": "victoriametrics" },
          "expr": "node_load1",
          "legendFormat": "{{instance}}"
        }
      ]
    },
    {
      "type": "row",
      "title": "DNS probes (outside-in)",
      "id": 20,
      "gridPos": { "h": 1, "w": 24, "x": 0, "y": 42 }
    },
    {
      "type": "table",
      "title": "Probe status (per zone / server)",
      "description": "blackbox_exporter on control queries each nameserver's public address (v4 + v6) for every zone: an SOA query (zone served) and a DNSKEY query (still signed). UP = the resolver's-eye view is healthy.",
      "id": 21,
      "datasource": { "type": "prometheus", "uid": "victoriametrics" },
      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 43 },
      "options": { "showHeader": true },
      "fieldConfig": {
        "defaults": {
          "custom": { "align": "auto", "cellOptions": { "type": "color-background" } },
          "thresholds": {
            "mode": "absolute",
            "steps": [
              { "color": "red", "value": null },
              { "color": "green", "value": 1 }
            ]
          },
          "mappings": [
            {
              "type": "value",
              "options": {
                "0": { "text": "DOWN", "index": 0 },
                "1": { "text": "UP", "index": 1 }
              }
            }
          ]
        },
        "overrides": [
          {
            "matcher": { "id": "byName", "options": "zone" },
            "properties": [{ "id": "custom.cellOptions", "value": { "type": "auto" } }]
          },
          {
            "matcher": { "id": "byName", "options": "query" },
            "properties": [{ "id": "custom.cellOptions", "value": { "type": "auto" } }]
          },
          {
            "matcher": { "id": "byName", "options": "instance" },
            "properties": [{ "id": "custom.cellOptions", "value": { "type": "auto" } }]
          }
        ]
      },
      "targets": [
        {
          "refId": "A",
          "datasource": { "type": "prometheus", "uid": "victoriametrics" },
          "expr": "probe_success",
          "format": "table",
          "instant": true
        }
      ],
      "transformations": [
        {
          "id": "organize",
          "options": {
            "excludeByName": { "Time": true, "__name__": true, "job": true },
            "renameByName": { "Value": "status" }
          }
        }
      ]
    },
    {
      "type": "timeseries",
      "title": "Probe success (1 = ok)",
      "description": "0 means the probe failed: the zone is not being served or not signed from that public address. Sustained failures fire DNSResolutionProbeFailed / DNSSECProbeFailed.",
      "id": 22,
      "datasource": { "type": "prometheus", "uid": "victoriametrics" },
      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 43 },
      "fieldConfig": { "defaults": { "unit": "short", "min": 0, "max": 1 }, "overrides": [] },
      "targets": [
        {
          "refId": "A",
          "datasource": { "type": "prometheus", "uid": "victoriametrics" },
          "expr": "probe_success",
          "legendFormat": "{{zone}} {{query}} @ {{instance}}"
        }
      ]
    },
    {
      "type": "timeseries",
      "title": "DNS probe latency",
      "description": "Total round-trip time of each blackbox DNS probe. A climbing trend points at a slow or overloaded nameserver before it starts failing outright.",
      "id": 23,
      "datasource": { "type": "prometheus", "uid": "victoriametrics" },
      "gridPos": { "h": 8, "w": 24, "x": 0, "y": 51 },
      "fieldConfig": { "defaults": { "unit": "s" }, "overrides": [] },
      "targets": [
        {
          "refId": "A",
          "datasource": { "type": "prometheus", "uid": "victoriametrics" },
          "expr": "probe_duration_seconds",
          "legendFormat": "{{zone}} {{query}} @ {{instance}}"
        }
      ]
    }
  ]
}