I am currently setting INITRAMFS_IMAGE="core-image-custom-initramfs" in my local.conf and things are working fine. However, I would prefer to move this out of the local.conf and it is not clear to me what other options there are besides a custom machine.conf file.
The yocto documentation for building an initial RAM filesystem (initramfs) image states:
"...set the INITRAMFS_IMAGE variable in the recipe that builds the kernel image."
This suggests to me that INITRAMFS_IMAGE should be set in the kernel build recipe. Is my understanding of the documentation correct?