Disk attached to VM not showing up in AppD.

[Justin.Matthew]

A new disk was attached to a windows server 2012. Restarted machine agent. Still the new disk not showing up in AppD under disks. Please assist. 

[Rajesh.Ganapavarapu]

Hello Justin,

By default, the machine agent has been configured to monitor 5 volumes. But this value is configurable.
 
Could you please take a look at the configuration of volumeMonitorConfig section in the $MACHINE_AGENT_HOME/extensions/ServerMonitoring/conf/ServerMonitoring.yml file? It must be looking like:

volumeMonitorConfig:
    # maxNumberVolumes specifies the maximum number of volumes that the
    # machine agent will monitor.
 maxNumberVolumes           : 5

    # whitelistSelectorRegex specifies the regular expression used to whitelist reported volumes
    # by name. A volume with the name matching the regex will always be reported,
    # with respect to maxNumberVolumes
    whitelistSelectorRegex        : ""

This configuration means that the agent will show only 5 volumes by default which you see in your case. You can set a higher value to the maxNumberVolumes parameter and then restart the machine agent to see the configured no. of volumes in your machine.
 
PS: Please note that as mentioned under Volume Metrics section at latest doc 
 
There is no maximum value for maxNumberVolumes parameter in volumeMonitorConfig section in the $MACHINE_AGENT_HOME/extensions/ServerMonitoring/conf/ServerMonitoring.yml file.

You can set any value you want.

I hope this helps  

Cheers,

Rajesh Ganapavarapu

[Shashwat .Pandey]

Hi Rajesh,

Thank you for the reply to the above doubt. I would also like to know on what is the max number of volume a machine agent can observe? i.e. if a server has for example 300 Volumes/Storage disk. Will the machine agent be able to monitor them all or Does the limit end at around 50-60 volumes?

Regards,

Shashwat

[Ryan.Paredez]

Hi @Shashwat .Pandey,

I found this AppD Docs page. Search the page for "Volume" to jump to the right sections.

https://docs.appdynamics.com/appd/22.x/latest/en/infrastructure-visibility/server-visibility/machine...

[Jaime.Merced]

Thank you so much you saved me much time I thought it was an agent incompatibility issue with AWS machine but you helped solved the mystery seems to be a programming by default issue.