Grafana dashboard: Node Metrics
Description: Dashboard to view multiple servers

Based on [User knut](https://grafana.net/knut) [Node Exporter Server Metrics](https://grafana.net/dashboards/405) dashboard.

## Changelog

### February 16th 2017
* Fix the repeat for HWMon and Online/UP state

### January 28th 2017
* Added Online/Up state
* Added HWMon Temperature
* Added interrupts to Context Switches Graph
* Added activeOpens and passiveOpens to the Netstat Graph
* Now the node selector updates on time range chanes

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      "label": "zerbytes_prometheus_main",
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        {
          "aliasColors": {
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            "Swap": "#E24D42"
          },
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              "alias": "Swap",
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          ],
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              "expr": "( node_memory_MemTotal{instance=~'$node'} - node_memory_MemFree{instance=~'$node'} - node_memory_Buffers{instance=~'$node'} - node_memory_Cached{instance=~'$node'} - node_memory_SwapCached{instance=~'$node'} - node_memory_Slab{instance=~'$node'} - node_memory_PageTables{instance=~'$node'} - node_memory_VmallocUsed{instance=~'$node'} )",
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