1.7.5 Monitoring disk resources

This subsection explains how to monitor the disk resources of a Docker container.

Organization of this subsection

(1) Overview
(2) Monitoring examples

(1) Overview

For Docker containers, the disk I/O resource, which includes information such as the disk transfer rate, can be monitored. The PI_HPDI and PI_HLDI records that indicate the physical server's disk resource and the PI_VLDI record that indicates the virtual machine's disk space resource are not supported.

PI_VPDI record

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

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(2) Monitoring examples

This subsection uses an example of monitoring the Docker container's disk I/O to explain the problems that might occur in disk resources and how to solve them. The following figure shows the items monitored here and the flow of actions to take.

Figure 1‒74: Monitored items and flow of actions

(a) Example of monitoring the disk I/O volume of a container

You can check the value of disk I/O volume in the Speed field of the PI_VPDI record. The figure below shows a monitoring example.

Figure 1‒75: Example of monitoring the disk I/O usage volume

Monitoring template report to be checked: VM Disk I/O

In this example, the value of disk I/O volume for container1 has increased. You can solve this problem by identifying a Docker container with high disk I/O volume.

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