System filesystem metricset

The System filesystem metricset provides file system statistics. For each file system, one document is provided.

This metricset is available on:

filesystem.ignore_types - An array of filesystem types to ignore. Metrics will not be collected from filesystems matching these types. If this option is not set, Metricbeat ignores all types for virtual devices in systems where this information is available (e.g. all types marked as nodev in /proc/filesystems in Linux systems). This setting affects the fsstats metricset.

To have Metricbeat report on all filesystems, regardless of type, set filesystem.ignore_types to an empty array ([]).

To ignore unavailable volumes, such as CD-ROM drives, on Windows include unavailable as a value in the array. To ignore unknown filesystems on Windows, include unknown as a value in the array.

There may be mounted filesystems that you don’t want Metricbeat to report metrics on. One option is to configure Metricbeat to ignore specific filesystem types. This can be accomplished by configuring filesystem.ignore_types with an array of filesystem types to ignore. In this example we are ignoring three types of filesystems.

metricbeat.modules:
  - module: system
    period: 30s
    metricsets: ["filesystem"]
    filesystem.ignore_types: [nfs, smbfs, autofs]

A common approach is to ignore any unavailable or unknown filesystems on Windows. For example:

metricbeat.modules:
  - module: system
    period: 30s
    metricsets: ["filesystem"]
    filesystem.ignore_types: [unavailable, unknown]

Another strategy to deal with these filesystems is to configure a drop_event processor that matches the mount_point using a regular expression. This type of filtering occurs after the data has been collected so it can be less efficient than specifying filesystem.ignore_types.

metricbeat.modules:
  - module: system
    period: 30s
    metricsets: ["filesystem"]
    processors:
      - drop_event.when.regexp:
          system.filesystem.mount_point: '^/(sys|cgroup|proc|dev|etc|host)($|/)'

{
    "@timestamp": "2017-10-12T08:05:34.853Z",
    "event": {
        "dataset": "system.filesystem",
        "duration": 115000,
        "module": "system"
    },
    "metricset": {
        "name": "filesystem",
        "period": 10000
    },
    "service": {
        "type": "system"
    },
    "system": {
        "filesystem": {
            "available": 148708327424,
            "device_name": "/dev/mapper/fedora-root",
            "files": 105089024,
            "free": 148708327424,
            "free_files": 103974920,
            "mount_point": "/",
            "total": 215211835392,
            "type": "xfs",
            "used": {
                "bytes": 66503507968,
                "pct": 0.309
            }
        }
    }
}