EC2 set BOOT_IMAGE parameters (as through GRUB_CMDLINE_LINUX) before instance starts

Question

Is it possible to set `BOOT_IMAGE` (can be seen after boot at `cat /proc/cmdline`). for an about-to-be-deployed EC2 instance?  
A regular usage would be to change `GRUB_CMDLINE_LINUX`, run `update-grub` and reboot.  
But I want to the instance to come up "ready" right from the start, without a need for an additional reboot.

Thanks

Praveen Kumar K · Answer

Hello,

You can change the required kernel parameters, create a custom AMI with those changes, and use that custom AMI for launching new instances with the desired kernel parameters.

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Related links suitable for your requirement,
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[+] https://repost.aws/knowledge-center/manage-ec2-linux-clock-source#:~:text=the%20GRUB_CMDLINE_LINUX%20option%3A-,GRUB_CMDLINE_LINUX,-%3D%22console%3Dtty0%20crashkernel

[+] https://repost.aws/knowledge-center/revert-stable-kernel-ec2-reboot#:~:text=To%20change%20the%20default%20kernel%20of%20the%20instance%2C%20run%20the%20grubby%20%2D%2Dset%2Ddefault%20command%3A

EC2 set BOOT_IMAGE parameters (as through GRUB_CMDLINE_LINUX) before instance starts

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