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Reviewing Virtualization Overview

The Virtualization Overview page provides a comprehensive view of virtualization resources, details, status, and top consumers. By gaining an insight into the overall health of OKD Virtualization, you can determine if intervention is required to resolve specific issues identified by examining the data.

Use the Getting Started resources to access quick starts, read the latest blogs on virtualization, and learn how to use operators. Obtain complete information about alerts, events, inventory, and status of virtual machines. Customize the Top Consumer cards to obtain data on high utilization of a specific resource by projects, virtual machines, or nodes. Click View virtualization dashboard for quick access to the Dashboards page.

Prerequisites

To use the vCPU wait metric in the Top Consumers card, the schedstats=enable kernel argument must be applied to the MachineConfig object. This kernel argument enables scheduler statistics used for debugging and performance tuning and adds a minor additional load to the scheduler. See the OKD machine configuration tasks documentation for more information on applying a kernel argument.

Resources monitored actively in the Virtualization Overview page

The following table shows actively monitored resources, metrics, and fields in the Virtualization Overview page. This information is useful when you need to obtain relevant data and intervene to resolve a problem.

Monitored resources, fields, and metrics

Description

Details

A brief overview of service and version information for OKD Virtualization.

Status

Alerts for virtualization and networking.

Activity

Ongoing events for virtual machines. Messages are related to recent activity in the cluster, such as pod creation or virtual machine migration to another host.

Running VMs by Template

The donut chart displays a unique color for each virtual machine template and shows the number of running virtual machines that use each template.

Inventory

Total number of active virtual machines, templates, nodes, and networks.

Status of VMs

Current status of virtual machines: running, provisioning, starting, migrating, paused, stopping, terminating, and unknown.

Permissions

Tasks for which capabilities are enabled through permissions: Access to public templates, Access to public boot sources, Clone a VM, Attach VM to multiple networks, Upload a base image from local disk, and Share templates.

Resources monitored for top consumption

The Top Consumers cards in Virtualization Overview page display projects, virtual machines or nodes with maximum consumption of a resource. You can select a project, a virtual machine, or a node and view the top five or top ten consumers of a specific resource.

Viewing the maximum resource consumption is limited to the top five or top ten consumers within each Top Consumers card.

The following table shows resources monitored for top consumers.

Resources monitored for top consumption

Description

CPU

Projects, virtual machines, or nodes consuming the most CPU.

Memory

Projects, virtual machines, or nodes consuming the most memory (in bytes). The unit of display (for example, MiB or GiB) is determined by the size of the resource consumption.

Used filesystem

Projects, virtual machines, or nodes with the highest consumption of filesystems (in bytes). The unit of display (for example, MiB or GiB) is determined by the size of the resource consumption.

Memory swap

Projects, virtual machines, or nodes consuming the most memory pressure when memory is swapped .

vCPU wait

Projects, virtual machines, or nodes experiencing the maximum wait time (in seconds) for the vCPUs.

Storage throughput

Projects, virtual machines, or nodes with the highest data transfer rate to and from the storage media (in mbps).

Storage IOPS

Projects, virtual machines, or nodes with the highest amount of storage IOPS (input/output operations per second) over a time period.

Reviewing top consumers for projects, virtual machines, and nodes

You can view the top consumers of resources for a selected project, virtual machine, or node in the Virtualization Overview page.

Prerequisites

  • You have access to the cluster as a user with the cluster-admin role.

Procedure

  1. In the Administrator perspective in the OKD Virtualization web console, navigate to Virtualization → Overview.

  2. Navigate to the Top Consumers cards.

  3. From the drop-down menu, select Show top 5 or Show top 10.

  4. For a Top Consumer card, select the type of resource from the drop-down menu: CPU, Memory, Used Filesystem, Memory Swap, vCPU Wait, or Storage Throughput.

  5. Select By Project, By VM, or By Node. A list of the top five or top ten consumers of the selected resource is displayed.

Additional resources