host-disk datasource

The host-disk datasource collects information about disks from the operating system and creates metric data points and entities.

Metrics

Name	Units	Description
disk.io_time	ms	Milliseconds spent doing I/Os in concrete moment of time.
disk.iops_in_progress	operations	I/Os currently in progress.
disk.merged_read_count	merged/sec	The number of read requests merged per second that were queued to the device.
disk.merged_write_count	merged/sec	The number of write requests merged per second that were queued to the device.
disk.read	sectors/sec	The number of sectors read from the device per second.
disk.read_count	operations/sec	The number of read requests that were issued to the device per second.
disk.read_time	ms	Milliseconds spent by all reads in concrete moment of time.
disk.weighted_io	weighted percent	This field is incremented at each I/O start, I/O completion, I/O merge, or read of these stats by the number of I/Os in progress times the number of milliseconds spent doing I/O since the last update of this field.
disk.write	sectors/sec	The number of sectors written to the device per second.
disk.write_count	operations/sec	The number of write requests that were issued to the device per second.
disk.write_time	ms	Milliseconds spent by all writes in concrete moment of time.

Name styles

This datasource supports two mutually exclusive naming styles for the metrics it collects:

• canonical — The default style, which features namespace prefixes.
• linuxMonitorZenPack — The legacy style, used in the Linux Monitor ZenPack.

To change the default, set the metric-names-variant property in the datasource section to linuxMonitorZenPack.

Canonical style	ZenPack style
disk.io_time	diskstats_ioInProgress
disk.iops_in_progress	diskstats_msDoingIO
disk.merged_read_count	diskstats_readsMerged
disk.merged_write_count	diskstats_writesMerged
disk.read	diskstats_sectorsRead
disk.read_count	diskstats_readsCompleted
disk.read_time	diskstats_msReading
disk.weighted_io	diskstats_msDoingIOWeighted
disk.write	diskstats_sectorsWritten
disk.write_count	diskstats_writesCompleted
disk.write_time	diskstats_msWriting

Entities

Property	Description
name	Disk label (if present) or the name used by the kernel
label	Disk label (may be empty)
kernel-name	Disk name used by the kernel
block_type	Block type (for example, disk, part, lvm)
major_minor	Major and minor number of the disk, separated by a colon
mountpoint	Path of disk mount point; empty if unmounted
serialNumber	Disk serial number; may be empty for virtual disks
size	Disk capacity, in bytes

Example

{
  "block_type": "lvm",
  "kernel-name": "dm-2",
  "label": "docker-docker--pool_tmeta",
  "major_minor": "253:2",
  "mountpoint": "",
  "name": "docker-docker--pool_tmeta",
  "serialNumber": "",
  "size": "943718400"
}

Configuration

If you specify the host-disk datasource during installation, its configuration file is placed in the following location:

/etc/zendatamon-configs/configs/host-disk.config.yaml

Otherwise, you must copy it from the templates directory:

cp /etc/zendatamon-configs/.templates/.configs/host-disk.config.yaml \
  /etc/zendatamon-configs/configs/host-disk.config.yaml

The Zenoss Data Monitor service monitors the /etc/zendatamon-configs/configs directory and loads any new or changed configuration files immediately.

Properties

interval (number)

The number of seconds to wait between collection attempts. This value overrides the defaultInterval value in the Zenoss Data Monitor service configuration file.

timeout (number)

The number of seconds to wait before dropping a collection attempt.

metric-names-variant (string, default = canonical)

The metric name style, either canonical or linuxMonitorZenPack.

protocol (string, default = local)

Collection type; only local is supported, so this key can be omitted.

ignore-unmounted (boolean, default = false)

Whether to skip unmounted disks during collection.

include-block-types (array)

A list of block types to collect.

• If populated, then only disks with matching block types are collected and the exclude-block-types list is ignored.
• If empty or omitted, all block types are collected.

exclude-block-types (array)

A list of block types not to collect.

use-sudo (boolean, default = false)

Whether to use sudo to run the lsblk command.

Example

apiVersion: v1
kind: datasource
name: host-disk
spec:
  type: host-disk
  datasource:
    interval: 60
    timeout: 30 
    metric-names-variant: canonical
    protocol: ""
    ignore-unmounted: false 
    include-block-types: 
      - disk
      - part
      - lvm
      - raid1
    exclude-block-types: []
    use-sudo: true