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#! /bin/bash
#*********************************************************************
#
# fai-setup -- set up FAI
#
# This script is part of FAI (Fully Automatic Installation)
# (c) 2000-2025 by Thomas Lange, lange@cs.uni-koeln.de
# Universitaet zu Koeln
#
#*********************************************************************
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# A copy of the GNU General Public License is available as
# `/usr/share/common-licences/GPL' in the Debian GNU/Linux distribution
# or on the World Wide Web at http://www.gnu.org/copyleft/gpl.html. You
# can also obtain it by writing to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
#*********************************************************************
PATH=/usr/local/bin:/usr/local/sbin:/bin:/sbin:/usr/bin:/usr/sbin
set -e
cfdir=/etc/fai
options=$@ # all options are also passed to fai-make-nfsroot
while getopts pPvC:efgkKV:B: opt ; do
case "$opt" in
C) cfdir=$OPTARG ;;
v) verbose=1 ; v=-v ;;
e) expert=1 ;;
esac
done
. $cfdir/fai.conf
. $cfdir/nfsroot.conf
: ${FAI_LOGPROTO:=ssh}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
add_export_line() {
# add a line to /etc/exports
pattern=$1
shift
options="$@"
[ -f /etc/exports ] && grep -q "^$pattern[[:space:]]" /etc/exports && return
echo "Adding line to /etc/exports: $pattern $options"
echo "$pattern $options" >> /etc/exports
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
add_fai_account() {
if id $LOGUSER 2>/dev/null 1>&2 ; then
echo Account \$LOGUSER=$LOGUSER already exists.
echo Make sure that all install clients can
echo log into this account without a password.
return
fi
adduser --system --disabled-password --home /var/log/fai/remote-logs --gecos "FAI account for remote log files" --shell /bin/sh $LOGUSER
# get the home dir of a user in a variable; do not exit when set -e is used
# loguserhome is unset if $LOGUSER does not exists
# this is not a evil hack, it's a very clever piece of code
loguserhome=$(eval "cd ~$LOGUSER 2>/dev/null && pwd;true")
touch $loguserhome/.account_created_by_fai_package
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
setup_fai_account() {
# most things should be executed as user $LOGUSER, since root may not have write
# permissions to $loguserhome (e.g if mount via NFS without no_root_squash)
set +e
loguserhome=$(eval "cd ~$LOGUSER 2>/dev/null && pwd;true")
sshdir=$loguserhome/.ssh
if [ -z "$loguserhome" ]; then
echo "Can't determine home directory for user $LOGUSER."
echo "LOGUSER= $LOGUSER loguserhome= $loguserhome"
exit 8
fi
if [ "$FAI_LOGPROTO" = "ssh" ]; then
# set up ssh on the server
mkdir -p -m 700 $loguserhome/.ssh
#Generating keys for LOGUSER
[ -f $sshdir/id_rsa ] || {
ssh-keygen -t rsa -N '' -f $sshdir/id_rsa -C "$LOGUSER@$HOSTNAME"
cat $sshdir/id_rsa.pub >> $sshdir/authorized_keys
}
[ -f $sshdir/id_ed25519 ] || {
ssh-keygen -t ed25519 -N '' -f $sshdir/id_ed25519 -C "$LOGUSER@$HOSTNAME"
cat $sshdir/id_ed25519.pub >> $sshdir/authorized_keys
}
[ -f $sshdir/id_ecdsa ] || {
ssh-keygen -t ecdsa -N '' -f $sshdir/id_ecdsa -C "$LOGUSER@$HOSTNAME"
cat $sshdir/id_ecdsa.pub >> $sshdir/authorized_keys
}
#Adding servers keys to known_hosts list of LOGUSER.
#So that installed clients can ssh $LOGUSER@$HOSTNAME without password
if [ ! -f $sshdir/known_hosts ]; then
[ -f /etc/ssh/ssh_host_ed25519_key.pub ] && ED25519SERVER=$(sed -e "s/= .*$/=/" /etc/ssh/ssh_host_ed25519_key.pub)
[ -f /etc/ssh/ssh_host_rsa_key.pub ] && RSASERVER=$(sed -e "s/= .*$/=/" /etc/ssh/ssh_host_rsa_key.pub )
[ -f /etc/ssh/ssh_host_ecdsa_key.pub ] && ECDSASERVER=$(sed -e "s/= .*$/=/" /etc/ssh/ssh_host_ecdsa_key.pub )
# determine all IP addresses, and their host names
ips=$(ip addr show up| grep -P -o '(?<=inet )[^/]+' | grep -v 127.0.0.1)
for ip in $ips; do
hname=$(getent hosts $ip| tr -s ' ' ',')
: ${hname:=$ip}
echo "Adding $hname to known_hosts."
[ -z "$ED25519SERVER" ] || echo "$hname $ED25519SERVER" >> $sshdir/known_hosts
[ -z "$RSASERVER" ] || echo "$hname $RSASERVER" >> $sshdir/known_hosts
[ -z "$ECDSASERVER" ] || echo "$hname $ECDSASERVER" >> $sshdir/known_hosts
done
echo "$sshdir/known_hosts created."
else
echo "$sshdir/known_hosts remained unchanged."
fi
chmod 0600 $sshdir/authorized_keys
echo "$sshdir/authorized_keys created."
fi
if [ "$FAI_LOGPROTO" = "rsh" ] && [ ! -f $loguserhome/.rhosts ]; then
# use .rhosts authentication
echo "+@faiclients root" > $loguserhome/.rhosts
chmod go-rwx $loguserhome/.rhosts
echo "$loguserhome/.rhosts created."
fi
logusergid=$(id -ng $LOGUSER)
echo "User account $LOGUSER set up."
set -e
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
{ # start huge block for capturing output
if [ -n "$LOGUSER" ]; then
add_fai_account
setup_fai_account
fi
cp /dev/null /var/log/fai/variables
set +e
if ! fai-make-nfsroot $options ; then
echo "ERROR when calling fai-make-nfsroot."
exit 9
fi
set -e
if [ -n "$LOGUSER" ]; then
# chown only if cd was successful
if cd $loguserhome; then
[ -e .rhosts ] && chown $LOGUSER:$logusergid . .rhosts || true
[ -d .ssh ] && chown -R $LOGUSER:$logusergid .ssh || true
fi
mkdir -p $TFTPROOT
chown -R $LOGUSER:$logusergid $TFTPROOT || true
fai-chboot -o default
fi
if [ -z "$FAI_CONFIGDIR" ]; then
echo "FAI_CONFIGDIR not set in /etc/fai/nfsroot.conf."
exit 7
fi
mkdir -p $FAI_CONFIGDIR
# in expert mode, do not export nfs directories
if [ -z "$expert" ]; then
# by default use the first interface which is up
if [ -z "$SERVERINTERFACE" ]; then
opt="up"
else
opt="dev $SERVERINTERFACE"
fi
nip=$(ip -br ad show $opt | awk '/UP / {if ($3) print $3}' | wc -l)
iprange=$(ip -br ad show $opt | awk '/UP / {if ($3) print $3}' | head -1)
myip=${iprange%/*}
if [ $nip -gt 1 ]; then
echo "Warning. More than one network interface found for FAI server."
echo "Using IP address $myip. Please set \$SERVERINTERFACE in"
echo "nfsroot.conf if you want to use another interface."
fi
echo "FAI_CONFIGDIR=$FAI_CONFIGDIR" >> /var/log/fai/variables
echo "FAI_CONFIG_SRC=nfs://${myip}$FAI_CONFIGDIR" >> /var/log/fai/variables
add_export_line $FAI_CONFIGDIR "$iprange(async,ro,no_subtree_check)"
add_export_line $NFSROOT "$iprange(async,ro,no_subtree_check,no_root_squash)"
if pidof nfsd >/dev/null
then
systemctl reload nfs-kernel-server
else
systemctl restart nfs-kernel-server
fi
fi
if [ ! -d $FAI_CONFIGDIR/class ]; then
fai-mk-configspace
echo "Please don't forget to fill out the FAI questionnaire after you've finished your project with FAI."
echo ""
fi
echo "FAI setup finished."
} |& tee /var/log/fai/fai-setup.log
RC=${PIPESTATUS[0]}
echo "Log file written to /var/log/fai/fai-setup.log"
exit ${RC}
|
