Monitoring using Linux Disk State

Introduction

The Linux disk state monitor tracks the read/write disk performance operation on Linux servers. The Linux disk state monitor detects possible application performance issues while continuously monitoring disk usage. As the agent monitors disk operations, a critical alert would be triggered if the disk changes to a read state.

To check the disk state, a Linux disk state monitor can be added using Setup > Monitoring > Templates > Other Monitors.

After applying the template to a device, the template can be validated if it is assigned to a resource.

Creating Linux disk state monitors

To create a Linux Disk state monitor:

1. Select a client from the All Clients list.
2. Go to Setup > Monitoring > Templates.
3. From TEMPLATES, click +Add.
4. From MONITOR TEMPLATE, provide the details for the following parameters and click Save:
   • Select Template Scope: The partner template or client-specific template. For the client-specific template, select the client.
   • Collector Type: The application type used to gather information. Select the agent.
   • Applicable for: The type of the application.
   • Template Name: The name of the template.
   • Description: The summary of the template.
   • Generation: The generation that the template belongs to. For example, Generation 2.
   • Tags: The user-defined tags used for enhance filtering.
   • Prerequisites: The essential prerequisites to consider while monitoring using a template. For a Windows template, as an example, check the SQL services while monitoring SQL parameters.
   • Status: The active or end-of-life templates.
   • Notes: Additional information to add to the template.
   • Template Family Name: The category that applies to the application. For example, Windows server, storage server, and network server.
   • Deployment Type: Select one of the following methods to apply the template to resources:
     • Custom
     • Optional
     • Standard
5. After providing the template details, go to Other Monitors section and click +Add. The other monitors screen appears.
6. From the options displayed in Monitor Type drop-down, select Linux Disk State. The Linux disk state screen appears.
7. From Linux Disk State, click Add to provide more detailed parameters.
   Note: Click Add and Remove to increase or decrease the following settings:
   • Frequency: The intervals used to monitor the disk partitions. The recommendation is 15 minutes.
   • Alert: Select Alert to receive alerts.
   • Apply Availability Monitor: Select the checkbox to show the availability of the monitors.
   • Priority: The priority of the alert.
   • FileSystem Partition: The Linux disk partition to monitor.

For example, to monitor the /dev/sda1 Linux partition, critical alerts can be raised when the disk is in read-mode.

After adding a template with Linux Disk State monitor, assign the template to a device to start monitoring.

Managing Linux disk state

Linux disk state monitor details can be viewed and modified when added to a template. Perform the following actions to manage the Linux disk state monitor:

• Edit: Click the template name displayed on the templates screen to modify the monitor details.
• View: View the monitor details in the templates screen. Click the arrow next to the template name to view the Linux disk state monitor added to the current template.

Collecting data

You can see the collected metrics with the Name: File Size Monitor in Infrastructure > Resources > Device Details > Monitors > Monitors.

Validating templates

The graphical data is displayed for each name configured in the Linux disk state monitor. Monitor graphs can be viewed under Infrastructure > Resources > Device Details > Metrics. Only one graph is displayed for all configured names in an individual Linux disk state monitor. The graph displays the monitor details based on the disk state.

Linux disk state alerts

Critical and OK alerts are sent while monitoring disk partitions. View the alerts in the Alert browser. Examine the alert description to verify disk status.