Trigger a Kernel Panic on AWS EC2 Nitro Instances by NMI method.
Environment
- Red Hat Enterprise Linux
- AWS Nitro Platform(C,M,R,T,Z series)
e.g- C5, C5d, C5n, i3.metal, I3en, M5, M5a, M5ad, M5d, p3dn.24xlarge, R5, R5a, R5ad, R5d, T3, T3a, and Z1d, except A1 (Arm-based)
Issue
- Unable to generate a Vmcore of the hung system on the RHEL server resides on the AWS Nitro platform.
- How to send a non-maskable interrupt (NMI) on the RHEL Nitro Instance on AWS platform.
Resolution
- To handle NMIs properly and initiate kdump, perform either of the following:
- Set the following parameter in /etc/sysctl.conf:
kernel.panic_on_io_nmi = 1
kernel.panic_on_unrecovered_nmi = 1
kernel.unknown_nmi_panic = 1
- Kdump Should be running and tested before; use this article to test the kdump,
- Once the above settings are successfully configured and tested. Use the below articles for Sending a Diagnostic Interrupt (NMI) using the AWS CLI or Amazon EC2 API.
Content from docs.aws.amazon.com is not included.Content from docs.aws.amazon.com is not included.https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/diagnostic-interrupt.html
Content from aws.amazon.com is not included.Content from aws.amazon.com is not included.https://aws.amazon.com/blogs/aws/new-trigger-a-kernel-panic-to-diagnose-unresponsive-ec2-instances/
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