centos cannot boot UEFI

[Jeff Hillman]

After the first reboot of a deployment centos will receive an error when PXE is being told to local boot.

---

Booting local disk...
error: no such device: /efi/ubuntu/shimx64.efi
error: File not found.

Press any key to continue...

---

The correct file is /efi/redhat/grub.efi

In the package python3-maas-provisioningserver exists /usr/lib/python3/dist-packages/provisioningserver/templates/uefi/config.local.amd64.template

Adding the lines ...

    {{elif kernel_params.osystem == "centos"}}
    search --set=root --file /efi/redhat/grub.efi
    chainloader /efi/redhat/grub.efi

to lines 9 - 11 resolves this problem. However, the local grub installed on disk now drops to a prompt as if it isn't finding it's configuration files.

on the deployed system the /boot/grub/grub.conf file is properly configured and annotated that it was configured via MAAS.

manually setting up root and pointing to the vmlinuz and initrd files at the grub prompt will result in a successful boot.

CentOS 6 sync'd via MAAS
python3-maas-provisioningserver 2.3.0-6434-gd354690-0ubuntu1~16.04.1
Xenial