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Dalton Hubble b492b1a23a Documentation: Change metal0 bridge to 172.18.0.0/24

* Change CIDR from 172.15.0.0/16, which isn't a reserved
private range
* Use a smaller CIDR, /24 is sufficient

2016-11-21 11:01:41 -08:00

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GRUB2 Netboot

Use GRUB to network boot UEFI hardware.

Requirements

For local development, install the dependencies for libvirt with UEFI.

UEFI with QEMU

Ensure that you've gone through the bootcfg with rkt and bootcfg guides and understand the basics.

Containers

Run bootcfg with rkt, but mount the grub group example.

Network

On Fedora, add the metal0 interface to the trusted zone in your firewall configuration.

sudo firewall-cmd --add-interface=metal0 --zone=trusted

Run the coreos.com/dnsmasq ACI with rkt.

sudo rkt run coreos.com/dnsmasq:v0.3.0 --net=metal0:IP=172.18.0.3 -- -d -q --dhcp-range=172.18.0.50,172.18.0.99 --enable-tftp --tftp-root=/var/lib/tftpboot --dhcp-match=set:efi-bc,option:client-arch,7 --dhcp-boot=tag:efi-bc,grub.efi --dhcp-userclass=set:grub,GRUB2 --dhcp-boot=tag:grub,"(http;bootcfg.foo:8080)/grub","172.18.0.2" --log-queries --log-dhcp --dhcp-userclass=set:ipxe,iPXE --dhcp-boot=tag:pxe,undionly.kpxe --dhcp-boot=tag:ipxe,http://bootcfg.foo:8080/boot.ipxe --address=/bootcfg.foo/172.18.0.2

Client VM

Create UEFI VM nodes which have known hardware attributes.

sudo ./scripts/libvirt create-uefi

Docker

If you use Docker, run bootcfg according to bootcfg with Docker, but mount the grub group example. Then start the coreos/dnsmasq Docker image, which bundles a grub.efi.

sudo docker run --rm --cap-add=NET_ADMIN quay.io/coreos/dnsmasq -d -q --dhcp-range=172.17.0.43,172.17.0.99 --enable-tftp --tftp-root=/var/lib/tftpboot --dhcp-match=set:efi-bc,option:client-arch,7 --dhcp-boot=tag:efi-bc,grub.efi --dhcp-userclass=set:grub,GRUB2 --dhcp-boot=tag:grub,"(http;bootcfg.foo:8080)/grub","172.17.0.2" --log-queries --log-dhcp --dhcp-option=3,172.17.0.1 --dhcp-userclass=set:ipxe,iPXE --dhcp-boot=tag:pxe,undionly.kpxe --dhcp-boot=tag:ipxe,http://bootcfg.foo:8080/boot.ipxe --address=/bootcfg.foo/172.17.0.2

Create a VM to verify the machine network boots.

sudo virt-install --name uefi-test --pxe --boot=uefi,network --disk pool=default,size=4 --network=bridge=docker0,model=e1000 --memory=1024 --vcpus=1 --os-type=linux --noautoconsole

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