How to use sysrq on AWS environment.

Solution Verified - Updated

Environment

  • Red Hat Enterprise Linux.
  • AWS instance.

Issue

  • How to use sysrq facility for capturing vmcore on amazon instance?

Resolution

  • Enable sysctl parameter related to sysrq. Add/modify(if already present) value of kernel.sysrq in /etc/sysctl.conf like below:

    kernel.sysrq=1

  • Execute below command to apply the changes:

    # sysctl -p

  • Kdump Should be running and tested before; refer to article to configure/review/test the kdump.

  • Once the above settings are successfully configured and tested. Use Content from docs.aws.amazon.com is not included.this article for information on using sysrq on amazon instance.
    Disclaimer: Above external link is not maintained by Red Hat support. Hence, Red Hat support does not takes responsibility of content in the above link.

  • For using NMI(non maskable interrupt) on eligible instances of AWS, refer to 4464301.

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