How to send NMI to an Azure VM

Environment

• Red Hat Enterprise Linux
• Azure

Issue

How to send Non-Maskable Interrupt to an Azure virtual machine [instance] to generate the vmcore to troubleshoot hung issues.

Resolution

• Follow the steps in Azure Portal to send NMI to a RHEL vm
  • Virtual Machines --> [go to] Red Hat Enterprise Linux virtual machine
    • Support + troubleshooting
      • Serial console
        • [in the command bar] keyboard icon --> Send Non-Maskable Interrupt (NMI)

Please refer Micro Soft's document on Content from docs.microsoft.com is not included.How to use the Azure Serial Console for SysRq and NMI calls

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Prerequisites:

• kdump should be configured, tested and functional to issue an NMI to generate a vmcore
  1. To configure kdump to capture a vmcore for Microsoft Azure virtual machines

  2. [Configure NMI in the system to panic/crash when NMI is pushed/sent](https://access.redhat.com/solutions/125103)
  
  3. **To Test**:  Send Non-Maskable Interrupt to an Azure virtual machine [instance] by using steps mentioned above in ***Resolution*** section
  

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