1.8.5 Monitoring disk resources

This subsection explains how to monitor the disk resources of a Podman environment.

Organization of this subsection

(1) Overview
(2) Monitoring examples

(1) Overview

In a Podman environment, resources can be divided into disk I/O resources indicating the transfer rate of a disk and other data, and disk space resources indicating the disk amount and other data. PFM - RM for Virtual Machine provides records for each of these resources. When monitoring the Podman environment, you can monitor disk resources with the records below. Note that the PI_VLDI record, which indicates the disk space resources of the container, is not supported.

PI_HPDI record

This record is used to monitor the performance data of the physical disk device. It shows the disk I/O resource as viewed from the physical server.
PI_VPDI record

This record is used to monitor the performance data of the physical disk device that is used by a container. It shows the disk I/O resource as viewed from the container.
PI_HLDI record

This record is used to monitor the performance data of the physical server's logical disk. It shows the disk space resources as viewed from the physical server.

The following figure shows the range of performance data collected in each record.

Figure 1‒85: Correspondence between records and data collection ranges

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(2) Monitoring examples

Using monitoring of disks 1 and 2 installed in the physical server as an example, this subsection explains the problems that might occur in the disk resources and how to solve them. The following figure shows the items monitored here and the flow of actions to take.

Figure 1‒86: Monitored items and flow of actions

(a) Example of monitoring the space usage of a physical server's logical disk

You can check whether a physical server's logical disk has sufficient free space based on the space usage.

You can check the space usage in the Used % field of the PI_HLDI record. Note that you can monitor this field using an alarm that is provided in the monitoring template. The figure below shows a monitoring example.

Figure 1‒87: Example of monitoring the space usage of a physical server's logical disk

Monitoring template report to be checked: Host Disk Used
Monitoring template alarm to be checked: Host Disk Usage

In this example, the space usage of Disk 2 is high. If the space usage is high, you can solve this problem by expanding the logical disk space through the addition of a physical disk.

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