Berwn
33ac7e106b
control runs VictoriaMetrics (loopback) and Grafana; every machine exports node metrics and the nameservers export Knot stats (mod-stats + knot-exporter). Scraping and the Grafana UI ride the ZeroTier mesh only, scoped by nftables to the mesh /88; the public side stays closed by the Hetzner cloud firewall. The provisioned DNS dashboard includes a per-zone SOA serial table to catch primary/secondary drift. ZeroTier ULAs are centralised in mesh-hosts.nix.
172 lines
5.5 KiB
JSON
172 lines
5.5 KiB
JSON
{
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"uid": "cnx-dns",
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"title": "CNX DNS",
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"tags": ["dns", "knot", "cnx"],
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"timezone": "browser",
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"schemaVersion": 39,
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"version": 1,
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"refresh": "30s",
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"time": { "from": "now-6h", "to": "now" },
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"templating": { "list": [] },
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"annotations": { "list": [] },
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"panels": [
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{
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"type": "row",
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"title": "DNS / Zones",
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"id": 1,
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"gridPos": { "h": 1, "w": 24, "x": 0, "y": 0 }
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},
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{
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"type": "table",
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"title": "Zone SOA serial (per nameserver)",
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"description": "ns1 and ns2 should report the same serial per zone. A divergence here is the secondary-out-of-sync condition.",
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"id": 2,
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"gridPos": { "h": 8, "w": 12, "x": 0, "y": 1 },
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"options": { "showHeader": true },
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"fieldConfig": {
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"defaults": { "custom": { "align": "auto" } },
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"overrides": []
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},
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"targets": [
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{
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"refId": "A",
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"expr": "knot_zone_serial",
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"format": "table",
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"instant": true,
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"legendFormat": "{{zone}} @ {{instance}}"
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}
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]
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},
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{
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"type": "timeseries",
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"title": "Seconds until zone expiry",
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"description": "On secondaries this counts down between successful transfers; a steady decline toward zero means transfers are failing.",
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"id": 3,
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"gridPos": { "h": 8, "w": 12, "x": 12, "y": 1 },
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"fieldConfig": { "defaults": { "unit": "s" }, "overrides": [] },
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"targets": [
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{
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"refId": "A",
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"expr": "knot_zone_status_expiration",
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"legendFormat": "{{zone}} @ {{instance}}"
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}
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]
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},
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{
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"type": "timeseries",
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"title": "Query rate by nameserver",
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"id": 4,
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"gridPos": { "h": 8, "w": 12, "x": 0, "y": 9 },
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"fieldConfig": { "defaults": { "unit": "qps" }, "overrides": [] },
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"targets": [
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{
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"refId": "A",
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"expr": "sum by (instance) (rate(knot_stats_request_protocol_total[5m]))",
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"legendFormat": "{{instance}}"
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}
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]
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},
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{
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"type": "timeseries",
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"title": "Response codes",
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"id": 5,
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"gridPos": { "h": 8, "w": 12, "x": 12, "y": 9 },
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"fieldConfig": { "defaults": { "unit": "qps" }, "overrides": [] },
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"targets": [
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{
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"refId": "A",
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"expr": "sum by (type) (rate(knot_stats_response_code_total[5m]))",
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"legendFormat": "{{type}}"
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}
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]
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},
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{
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"type": "row",
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"title": "Hosts",
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"id": 6,
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"gridPos": { "h": 1, "w": 24, "x": 0, "y": 17 }
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},
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{
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"type": "timeseries",
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"title": "CPU busy %",
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"id": 7,
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"gridPos": { "h": 8, "w": 12, "x": 0, "y": 18 },
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"fieldConfig": {
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"defaults": { "unit": "percent", "min": 0, "max": 100 },
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"overrides": []
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},
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"targets": [
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{
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"refId": "A",
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"expr": "100 - (avg by (instance) (rate(node_cpu_seconds_total{mode=\"idle\"}[5m])) * 100)",
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"legendFormat": "{{instance}}"
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}
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]
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},
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{
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"type": "timeseries",
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"title": "Memory used %",
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"id": 8,
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"gridPos": { "h": 8, "w": 12, "x": 12, "y": 18 },
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"fieldConfig": {
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"defaults": { "unit": "percent", "min": 0, "max": 100 },
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"overrides": []
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},
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"targets": [
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{
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"refId": "A",
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"expr": "100 * (1 - node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes)",
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"legendFormat": "{{instance}}"
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}
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]
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},
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{
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"type": "timeseries",
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"title": "Root filesystem used %",
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"id": 9,
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"gridPos": { "h": 8, "w": 12, "x": 0, "y": 26 },
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"fieldConfig": {
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"defaults": { "unit": "percent", "min": 0, "max": 100 },
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"overrides": []
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},
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"targets": [
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{
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"refId": "A",
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"expr": "100 * (1 - node_filesystem_avail_bytes{mountpoint=\"/\",fstype!=\"tmpfs\"} / node_filesystem_size_bytes{mountpoint=\"/\",fstype!=\"tmpfs\"})",
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"legendFormat": "{{instance}}"
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}
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]
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},
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{
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"type": "timeseries",
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"title": "Load average (1m)",
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"id": 10,
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"gridPos": { "h": 8, "w": 12, "x": 12, "y": 26 },
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"fieldConfig": { "defaults": { "unit": "short" }, "overrides": [] },
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"targets": [
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{
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"refId": "A",
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"datasource": { "type": "prometheus", "uid": "victoriametrics" },
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"expr": "node_load1",
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"legendFormat": "{{instance}}"
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}
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]
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}
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]
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}
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