Grafana dashboard: Kubernetes cluster monitoring (Prometheus)
Description: Monitors Kubernetes cluster using Prometheus. Shows overall cluster CPU / Memory / Filesystem usage as well as individual pod, containers, systemd services statistics. Uses cAdvisor metrics only.

首先，这是一个kubernetes非常全面的监控面板；其次增加了几个选项："Cluster"、“Node”、"Namespace"，并且 Node 和 Namespace 会随Cluster联动。

注意：Cluster名称是在prometheus配置文件里面自定义的标签k8scluster，比如 k8scluster: jcyfb-k8s。请看第二张图片

static_configs:
      - targets: ['x.x.x.x:9090']
        labels:
          k8scluster: jcyfb-k8s

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              "intervalFactor": 1,
              "legendFormat": "-> pod: {{ pod_name }} | {{ container_name }}",
              "metric": "network",
              "refId": "B",
              "step": 10
            },
            {
              "expr": "- sum (rate (container_network_transmit_bytes_total{image!=\"\",name=~\"^k8s_.*\",kubernetes_io_hostname=~\"^$Node$\",namespace=~\"^$Namespace$\",k8scluster=~\"^$Cluster$\"}[1m])) by (container_name, pod_name)",
              "hide": false,
              "interval": "10s",
              "intervalFactor": 1,
              "legendFormat": "<- pod: {{ pod_name }} | {{ container_name }}",
              "metric": "network",
              "refId": "D",
              "step": 10
            },
            {
              "expr": "sum (rate (container_network_receive_bytes_total{image!=\"\",name!~\"^k8s_.*\",kubernetes_io_hostname=~\"^$Node$\",namespace=~\"^$Namespace$\",k8scluster=~\"^$Cluster$\"}[1m])) by (kubernetes_io_hostname, name, image)",
              "hide": false,
              "interval": "10s",
              "intervalFactor": 1,
              "legendFormat": "-> docker: {{ kubernetes_io_hostname }} | {{ image }} ({{ name }})",
              "metric": "network",
              "refId": "A",
              "step": 10
            },
            {
              "expr": "- sum (rate (container_network_transmit_bytes_total{image!=\"\",name!~\"^k8s_.*\",kubernetes_io_hostname=~\"^$Node$\",namespace=~\"^$Namespace$\",k8scluster=~\"^$Cluster$\"}[1m])) by (kubernetes_io_hostname, name, image)",
              "hide": false,
              "interval": "10s",
              "intervalFactor": 1,
              "legendFormat": "<- docker: {{ kubernetes_io_hostname }} | {{ image }} ({{ name }})",
              "metric": "network",
              "refId": "C",
              "step": 10
            },
            {
              "expr": "sum (rate (container_network_transmit_bytes_total{rkt_container_name!=\"\",kubernetes_io_hostname=~\"^$Node$\",namespace=~\"^$Namespace$\",k8scluster=~\"^$Cluster$\"}[1m])) by (kubernetes_io_hostname, rkt_container_name)",
              "hide": false,
              "interval": "10s",
              "intervalFactor": 1,
              "legendFormat": "-> rkt: {{ kubernetes_io_hostname }} | {{ rkt_container_name }}",
              "metric": "network",
              "refId": "E",
              "step": 10
            },
            {
              "expr": "- sum (rate (container_network_transmit_bytes_total{rkt_container_name!=\"\",kubernetes_io_hostname=~\"^$Node$\",namespace=~\"^$Namespace$\",k8scluster=~\"^$Cluster$\"}[1m])) by (kubernetes_io_hostname, rkt_container_name)",
              "hide": false,
              "interval": "10s",
              "intervalFactor": 1,
              "legendFormat": "<- rkt: {{ kubernetes_io_hostname }} | {{ rkt_container_name }}",
              "metric": "network",
              "refId": "F",
              "step": 10
            }
          ],
          "thresholds": [],
          "timeFrom": null,
          "timeShift": null,
          "title": "Containers network I/O (1m avg)",
          "tooltip": {
            "msResolution": false,
            "shared": true,
            "sort": 2,
            "value_type": "cumulative"
          },
          "type": "graph",
          "xaxis": {
            "mode": "time",
            "name": null,
            "show": true,
            "values": []
          },
          "yaxes": [
            {
              "format": "Bps",
              "label": null,
              "logBase": 1,
              "max": null,
              "min": null,
              "show": true
            },
            {
              "format": "short",
              "label": null,
              "logBase": 1,
              "max": null,
              "min": null,
              "show": false
            }
          ]
        }
      ],
      "showTitle": false,
      "titleSize": "h6",
      "height": "250px",
      "repeat": null,
      "repeatRowId": null,
      "repeatIteration": null,
      "collapse": false
    },
    {
      "title": "All processes network I/O",
      "panels": [
        {
          "aliasColors": {},
          "bars": false,
          "datasource": "${DS_PROMETHEUS}",
          "decimals": 2,
          "editable": true,
          "error": false,
          "fill": 1,
          "grid": {},
          "id": 29,
          "legend": {
            "alignAsTable": true,
            "avg": true,
            "current": true,
            "max": false,
            "min": false,
            "rightSide": false,
            "show": true,
            "sideWidth": 200,
            "sort": "current",
            "sortDesc": true,
            "total": false,
            "values": true
          },
          "lines": true,
          "linewidth": 2,
          "links": [],
          "nullPointMode": "connected",
          "percentage": false,
          "pointradius": 5,
          "points": false,
          "renderer": "flot",
          "seriesOverrides": [],
          "span": 12,
          "stack": false,
          "steppedLine": false,
          "targets": [
            {
              "expr": "sum (rate (container_network_receive_bytes_total{id!=\"/\",kubernetes_io_hostname=~\"^$Node$\",namespace=~\"^$Namespace$\",k8scluster=~\"^$Cluster$\"}[1m])) by (id)",
              "interval": "10s",
              "intervalFactor": 1,
              "legendFormat": "-> {{ id }}",
              "metric": "network",
              "refId": "A",
              "step": 10
            },
            {
              "expr": "- sum (rate (container_network_transmit_bytes_total{id!=\"/\",kubernetes_io_hostname=~\"^$Node$\",namespace=~\"^$Namespace$\",k8scluster=~\"^$Cluster$\"}[1m])) by (id)",
              "interval": "10s",
              "intervalFactor": 1,
              "legendFormat": "<- {{ id }}",
              "metric": "network",
              "refId": "B",
              "step": 10
            }
          ],
          "thresholds": [],
          "timeFrom": null,
          "timeShift": null,
          "title": "All processes network I/O (1m avg)",
          "tooltip": {
            "msResolution": false,
            "shared": true,
            "sort": 2,
            "value_type": "cumulative"
          },
          "type": "graph",
          "xaxis": {
            "mode": "time",
            "name": null,
            "show": true,
            "values": []
          },
          "yaxes": [
            {
              "format": "Bps",
              "label": null,
              "logBase": 1,
              "max": null,
              "min": null,
              "show": true
            },
            {
              "format": "short",
              "label": null,
              "logBase": 1,
              "max": null,
              "min": null,
              "show": false
            }
          ]
        }
      ],
      "showTitle": false,
      "titleSize": "h6",
      "height": "500px",
      "repeat": null,
      "repeatRowId": null,
      "repeatIteration": null,
      "collapse": false
    }
  ]
}