User:Jchdel: Difference between revisions

Revision as of 14:16, 29 May 2023

My current home/lab setup is

An Alpine router x86_64 running https://github.com/jchdel/select-fastest-gateway connected to two or three different uplinks
a switch
a R-Pi 4 (used as usual desktop) also in 64 bits
a tower (16 cores x86_64, 128GB RAM) running Alpine, openVSwitch and qemu-kvm
dual 43" 4K (DP to desktop, HDMI to R-Pi 4)

I plan to run a Xorg desktop headless in some KVM and remotely connect to it from the R-Pi as X station... And to drive other dev and build boxes as KVM.

What about https://github.com/e1z0/Framebuffer-browser on Alpine? I plan to give a try and maybe package it...

#!/bin/sh
set -x
# This script is intended to transform an Alpine Linux USB key running in 
# diskless mode into a PXE boot server.
# It will run with a fixed IP 10.33.0.1 on eth0 acting as primary DHCP
# server.
# Only packages present in the local boot media will be available for 
# booted boxes.

set -e

mount -o remount,rw /media/usb

# Let's do all downloads first!
sed -i -e '/community/s/^#//' -e '/edge/d' /etc/apk/repositories
apk update
apk add abuild

cd /media/usb/apks/x86_64
LIST_OF_PACKAGES="aardvark-dns
abuild
acct
acct-openrc
alpine-base
alpine-baselayout
alpine-baselayout-data
alpine-conf
alpine-keys
alpine-release
apk-tools
argon2-libs
attr
bash
blkid
brotli-libs
busybox
busybox-binsh
busybox-mdev-openrc
busybox-openrc
busybox-suid
ca-certificates
ca-certificates-bundle
catatonit
conmon
containers-common
crun
cryptsetup-libs
curl
darkhttpd
device-mapper-libs
e2fsprogs
e2fsprogs-libs
fakeroot
fuse-common
fuse-openrc
fuse-overlayfs
fuse3
fuse3-libs
glib
gnupg-gpgconf
gpg
gpg-agent
gpgme
gpgsm
ifupdown-ng
ip6tables
ip6tables-openrc
iptables
iptables-openrc
json-c
kmod
kmod-libs
kmod-openrc
lddtree
libacl
libassuan
libblkid
libbz2
libc-utils
libcap2
libcom_err
libcrypto3
libcurl
libedit
libevent
libffi
libgcc
libgcrypt
libgpg-error
libintl
libksba
libmnl
libmount
libnftnl
libseccomp
libslirp
libssl3
libuuid
linux-firmware-none
linux-lts
linux-pam
lzip
lz4-libs
mdev-conf
mkinitfs
mtools
musl
musl-utils
ncurses-libs
ncurses-terminfo-base
netavark
nghttp2-libs
npth
openrc
openssh
openssh-client-common
openssh-client-default
openssh-keygen
openssh-server
openssh-server-common
openssh-sftp-server
openssl
patch
pcre2
pkgconf
pinentry
podman
podman-openrc
popt
readline
rsync
rsync-openrc
scanelf
shadow-libs
shadow-subids
slirp4netns
sqlite-libs
ssl_client
syslinux
tar
tmux
vim
xxd
xz-libs
yajl
zlib
zstd-libs"
for p in $LIST_OF_PACKAGES ; do apk fetch $p ; done
apk index -o APKINDEX.tar.gz *.apk
export SUDO=""
abuild-keygen -n -i -a
lbu add ~/.abuild
abuild-sign APKINDEX.tar.gz

apk add darkhttpd nfs-utils dnsmasq syslinux 

export SUDO=""
abuild-keygen -n -i -a

ALPINE=alpine-netboot-3.17.3-x86_64.tar.gz
[ -f $ALPINE ] || \
while true;do 
	wget -c https://dl-cdn.alpinelinux.org/alpine/v3.17/releases/x86_64/$ALPINE \
		&& break
done

mkdir -p /media/usb/tftpboot/pxelinux/pxelinux.cfg

# populate TFTP server
rm -fr /tmp/boot
tar xf alpine-netboot-3.17.3-x86_64.tar.gz -C /tmp
cp -r /tmp/boot/* /media/usb/tftpboot/pxelinux/

# populate HTTP server
#cd /media/usb
# add default apkovl.tar.gz here

# configure darkhttpd (nginx should already be done by bootstrap-manager)
sed -i -e 's+/var/www/localhost/htdocs+/media/usb+' /etc/init.d/darkhttpd
lbu add /etc/init.d/darkhttpd

# populate NFS server
## implicit as we publish /media/usb

# configure NFS for PXE boot
cat << EOF > /etc/exports
# /etc/exports
#
# See exports(5) for a description.

# use exportfs -arv to reread
/media/usb	*(ro,no_root_squash,no_subtree_check)
EOF

# configure dnsmasq for PXE boot
cat << EOF > /etc/dnsmasq.d/stamp.conf
# DNS related options
interface=eth0
listen-address=10.33.0.1
listen-address=127.0.0.1
## uplink resolver
server=1.1.1.1
# DHCP related options
dhcp-range=10.33.0.1,10.33.1.254,12h
## push router
dhcp-option=option:router,10.33.0.1
## push resolver
dhcp-option=6,10.33.0.1
# PXE (TFTP) related options
enable-tftp
dhcp-boot=pxelinux/pxelinux.0
tftp-root=/media/usb/tftpboot
EOF
cp /usr/share/syslinux/pxelinux.0 /media/usb/tftpboot/pxelinux/
cp /usr/share/syslinux/ldlinux.c32 /media/usb/tftpboot/pxelinux/
cat << EOF > /media/usb/tftpboot/pxelinux/pxelinux.cfg/default
PROMPT 0
TIMEOUT 3
default alpine
LABEL alpine
LINUX vmlinuz-lts
INITRD pxerd
APPEND ip=dhcp alpine_dev=nfs:10.33.0.1:/media/usb/boot modloop=http://10.33.0.1/boot/modloop-lts nomodeset apkovl=http://10.33.0.1/stamp/stamp.apkovl.tar.gz alpine_repo=http://10.33.0.1/apks
EOF
# generate initramfs for PXE
if [ ! -f /media/usb/tftpboot/pxelinux/pxerd ];then
  cd /etc/mkinitfs/features.d/
  echo "kernel/drivers/net/virtio_net.ko" >> network.modules
  echo "kernel/drivers/net/ethernet/e1000/*.ko" >> network.modules
  echo "/usr/share/udhcpc/default.script" > dhcp.files
  echo "kernel/net/packet/af_packet.ko" > dhcp.modules
  echo "kernel/fs/nfs/*" > nfs.modules
  cd /etc/mkinitfs/
  echo 'features="ata base bootchart cdrom cramfs ext2 ext3 ext4 xfs floppy keymap kms raid scsi usb virtio squashfs network dhcp nfs"' > mkinitfs.conf
  mkinitfs -o /media/usb/tftpboot/pxelinux/pxerd
fi

# console welcome message
cat << EOF > /etc/motd

This a PXE server intended to deploy a fleet of diskless Alpine Linux.

EOF

cat << EOF > /etc/network/interfaces
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
	address 10.33.0.1
	netmask 255.255.0.0
EOF

# force install from cache at reboot
cat << EOF > /etc/local.d/fix.start
#!/bin/sh
apk add darkhttpd
service darkhttpd start
EOF
chmod +x /etc/local.d/fix.start

# enable services at reboot
rc-update add local
rc-update add darkhttpd
rc-update add nfs
rc-update add dnsmasq

# persist changes
sync
apk cache -v sync
mount -o remount,ro /media/usb
lbu ci

echo "Press 'Enter' to reboot and act as PXE boot server"
echo "or 'ctrl-c' to go back to the terminal..."
read

reboot