Grafana dashboard: 1 Node Exporter 1.0.1
Description: Host Metrics (VM, Server, OS)
https://github.com/fchiorascu/Observability

This dashboard is `Dynamic`  where you can have the metrics for: `1 VM, Multiple VMs or All VMs`.

`Metrics:`
- UP
- Load
- CPU
- RAM
- NTP
- Disk
- Swap
- Forks
- Inodes
- Kernel
- Uptime
- Entropy
- Threads
- Network
- Systemd
- Interrupts
- Processes
- File Descriptors
- Switches Context

`Versions:`
- Grafana: 7.4.0+
- Prometheus: 2.24.1+
- Node Exporter: 1.0.1+

`Interval and range variables:` http://docs.grafana.org/features/datasources/prometheus/
- Support for $__range, $__range_s and $__range_ms only available from Grafana v5.3
- It’s possible to use some global built-in variables in query variables; $__interval, $__interval_ms, $__range, $__range_s and $__range_ms, see Global built-in variables for more information. These can be convenient to use in conjunction with the query_result function when you need to filter variable queries since label_values function doesn’t support queries.
- Make sure to set the variable’s refresh trigger to be On Time Range Change to get the correct instances when changing the time range on the dashboard.

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          "description": "- In computing, a context switch is the process of storing the state of a process or of a thread, so that it can be restored and execution resumed from the same point later. This allows multiple processes to share a single CPU, and is an essential feature of a multitasking operating system.\n\n - The precise meaning of the phrase “context switch” varies significantly in usage. In a multitasking context, it refers to the process of storing the system state for one task, so that task can be paused and another task resumed. A context switch can also occur as the result of an interrupt, such as when a task needs to access disk storage, freeing up CPU time for other tasks. Some operating systems also require a context switch to move between user mode and kernel mode tasks. The process of context switching can have a negative impact on system performance, although the size of this effect depends on the nature of the switch being performed.\n\n - Context switches are usually computationally intensive, and much of the design of operating systems is to optimize the use of context switches. Switching from one process to another requires a certain amount of time for doing the administration – saving and loading registers and memory maps, updating various tables and lists, etc. What is actually involved in a context switch varies between these senses and between processors and operating systems. For example, in the Linux kernel, context switching involves switching registers, stack pointer, and program counter, but is independent of address space switching, though in a process switch an address space switch also happens. Further still, analogous context switching happens between user threads, notably green threads, and is often very light-weight, saving and restoring minimal context. In extreme cases, such as switching between goroutines in Go, a context switch is equivalent to a coroutine yield, which is only marginally more expensive than a subroutine call.",
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        "hide": 0,
        "includeAll": true,
        "index": -1,
        "label": "Host",
        "multi": true,
        "name": "host",
        "options": [],
        "query": "label_values(up{env=\"$env\", instance=~\".*9100\"}, alias)",
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "sort": 1,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      }
    ]
  },
  "time": {
    "from": "now-15m",
    "to": "now"
  },
  "timepicker": {
    "collapse": false,
    "enable": true,
    "notice": false,
    "now": true,
    "refresh_intervals": [
      "15s",
      "30s",
      "1m",
      "5m",
      "15m",
      "30m",
      "1h",
      "2h",
      "6h",
      "1d",
      "2d",
      "3d",
      "5d",
      "7d",
      "14d",
      "20d",
      "30d"
    ],
    "status": "Stable",
    "time_options": [
      "5m",
      "15m",
      "1h",
      "6h",
      "12h",
      "24h",
      "2d",
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    ],
    "type": "timepicker"
  },
  "timezone": "browser",
  "title": "1 Node Exporter 1.0.1",
  "uid": "KvM1xSCZz",
  "variables": {
    "list": []
  },
  "version": 4
}