Ilker ManapandClaude Opus 5.5
a0df7295ea
UEFI machines were given syslinux.efi, which is unsigned: with Secure
Boot on (the default on much server hardware) the firmware refuses it
("Access Denied", seen on an OVMF lab VM), so such a machine could not
PXE-boot at all. They now get Debian's signed shim (bootx64.efi), which
loads the signed network GRUB (grubx64.efi); GRUB reads
grub/grub.cfg-<mac>, else grub/grub.cfg-default, and loads kernels
only as shim verifies them. Rack controllers write the GRUB menus from
the pxelinux menus they already get (same entries: kernel and initrd,
local disk via exit, power off via halt), so both always agree; BIOS
machines keep pxelinux. install.sh, install-rack.sh and bootstrap.sh
install shim-signed and grub-efi-amd64-signed and lay out the files.
Secure Boot covers the kernel; the initrd and the squashfs it fetches
are not covered by it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
77 lines
5.0 KiB
Bash
Executable File
77 lines
5.0 KiB
Bash
Executable File
#!/bin/sh
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# Install a rollcall rack controller on this host (Debian/Ubuntu). Run as root
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# from this directory with the rollcall binary next to it, after enrolling:
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#
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# region$ rollcall controller join-code -name hall-b -addr REGION:443
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# rack$ ./rollcall rack join <code> -url http://ADDR-ON-THE-SEGMENT
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#
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# which writes /etc/rollcall/rack.json and the rack's certificate; from then on
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# rack and region talk over mutual TLS (rack.example.json shows the fields).
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#
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# The rack controller serves DHCP/TFTP (dnsmasq) on the VLANs the region
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# assigns to it, keeps boot and OS images in a local cache, runs BMC commands
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# and passes the node API through to the region.
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set -eu
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cd "$(dirname "$0")"
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[ -r /etc/rollcall/rack.json ] || { echo "enroll first: ./rollcall rack join CODE -url http://ADDR (code from: rollcall controller join-code on the region)" >&2; exit 1; }
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export DEBIAN_FRONTEND=noninteractive
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apt-get install -y -q dnsmasq ipmitool pxelinux syslinux-common syslinux-efi shim-signed grub-efi-amd64-signed jq openssl >/dev/null
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getent passwd rollcall >/dev/null || useradd --system --no-create-home --shell /usr/sbin/nologin --user-group rollcall
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[ -x ./rollcall ] && install -m 0755 rollcall /usr/local/bin/rollcall
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chgrp rollcall /etc/rollcall/rack.json && chmod 0640 /etc/rollcall/rack.json
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# certificate from rollcall rack join: readable by the service's group, the key by nobody else
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if [ -d /etc/rollcall/rack ]; then chgrp -R rollcall /etc/rollcall/rack && chmod 0750 /etc/rollcall/rack && chmod 0640 /etc/rollcall/rack/*-key.pem; fi
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TFTP=$(jq -r '(.tftp_root // "") | if . == "" then "/srv/tftp" else . end' /etc/rollcall/rack.json)
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CACHE=$(jq -r '(.cache_dir // "") | if . == "" then "/var/cache/rollcall" else . end' /etc/rollcall/rack.json)
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DNS=$(jq -r '(.dnsmasq_dir // "") | if . == "" then "/var/lib/rollcall/dnsmasq" else . end' /etc/rollcall/rack.json)
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# image cache: kernels/initrds are prefetched (TFTP cannot fetch on demand), the rest fills on first use
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install -d -o rollcall -g rollcall "$CACHE" "$CACHE/rollcall" "$CACHE/images" "$CACHE/os"
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# TFTP root: syslinux for BIOS and UEFI, per-MAC files written by the rack controller
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install -d "$TFTP" "$TFTP/efi64"
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install -d -o rollcall -g rollcall -m 2775 "$TFTP/pxelinux.cfg"
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cp /usr/lib/PXELINUX/pxelinux.0 "$TFTP/"
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for f in ldlinux.c32 menu.c32 libutil.c32 libcom32.c32 poweroff.c32; do cp /usr/lib/syslinux/modules/bios/$f "$TFTP/"; done
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cp /usr/lib/SYSLINUX.EFI/efi64/syslinux.efi "$TFTP/efi64/"
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for f in ldlinux.e64 menu.c32 libutil.c32 libcom32.c32; do cp /usr/lib/syslinux/modules/efi64/$f "$TFTP/efi64/"; done
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ln -sfn ../pxelinux.cfg "$TFTP/efi64/pxelinux.cfg"
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# UEFI, Secure Boot included: signed shim and GRUB; rollcall writes the GRUB menus next to pxelinux's
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if [ -f /usr/lib/shim/shimx64.efi.signed ] && [ -f /usr/lib/grub/x86_64-efi-signed/grubnetx64.efi.signed ]; then
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install -m 0644 /usr/lib/shim/shimx64.efi.signed "$TFTP"/bootx64.efi
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install -m 0644 /usr/lib/grub/x86_64-efi-signed/grubnetx64.efi.signed "$TFTP"/grubx64.efi
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install -d -o root -g rollcall -m 2775 "$TFTP"/grub
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else
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echo "WARNING: shim-signed or grub-efi-amd64-signed missing: UEFI machines cannot PXE-boot (apt install shim-signed grub-efi-amd64-signed)" >&2
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fi
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ln -sfn "$CACHE/rollcall" "$TFTP/rollcall"
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ln -sfn "$CACHE/images" "$TFTP/images"
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ln -sfn ../rollcall "$TFTP/efi64/rollcall"
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ln -sfn ../images "$TFTP/efi64/images"
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# dnsmasq reads what the rack controller generates; until then it only answers local DNS
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install -d -o rollcall -g rollcall "$DNS" "$DNS/conf.d"
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for f in hosts hosts.dhcp; do [ -e "$DNS/$f" ] || install -m 0644 -o rollcall -g rollcall /dev/null "$DNS/$f"; done
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# bind-dynamic binds address by address, so systemd-resolved's 127.0.0.53 stub does not get in the way;
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# until the region assigns a VLAN only loopback is served
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printf '# rollcall rack controller: the configuration is generated from the region'"'"'s network model\nbind-dynamic\ninterface=lo\nconf-dir=/var/lib/rollcall-dnsmasq/,*.conf\n' > /etc/dnsmasq.d/rollcall.conf
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install -d -m 0755 /var/lib/rollcall-dnsmasq
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install -m 0755 rollcall-dnsmasq-reload.sh /usr/local/bin/rollcall-dnsmasq-reload.sh
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install -m 0755 rollcall-rack-update.sh /usr/local/bin/rollcall-rack-update.sh
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install -d -m 0755 -o rollcall -g rollcall /var/lib/rollcall/update
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install -d -m 0700 -o rollcall -g rollcall /var/lib/rollcall/rack-cert # renewed certificates (the joined ones are root's)
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install -m 0644 rollcall-dnsmasq.path rollcall-dnsmasq.service rollcall-rack.service rollcall-rack-update.path rollcall-rack-update.service /etc/systemd/system/
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systemctl daemon-reload
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systemctl enable dnsmasq.service rollcall-dnsmasq.path rollcall-rack-update.path >/dev/null 2>&1
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systemctl start rollcall-rack-update.path
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/usr/local/bin/rollcall-dnsmasq-reload.sh >/dev/null 2>&1 || true
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systemctl restart dnsmasq.service || { journalctl -u dnsmasq -n 5 --no-pager >&2; exit 1; }
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systemctl start rollcall-dnsmasq.path
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systemctl enable --now rollcall-rack.service
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systemctl restart rollcall-rack.service
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sleep 2
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systemctl --no-pager status rollcall-rack.service | head -5
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