confluent/confluent_osdeploy/debian/initramfs/lib/debian-installer-startup.d/S25confluentinit

reverse_uuid() {
    echo $1 | head -c 8 | tail -c 2
    echo $1 | head -c 6 | tail -c 2
    echo $1 | head -c 4 | tail -c 2
    echo $1 | head -c 2 | tail -c 2
    echo $1 | head -c 13 | tail -c 2
    echo $1 | head -c 11 | tail -c 2
    echo $1 | head -c 18 | tail -c 2
    echo $1 | head -c 16 | tail -c 2
    echo $1 | tail -c 18 | sed -e s/-//
}
setdebopt() {
    debconf-set $1 $2
    echo d-i $1 $3 $2 >> /preseed.cfg
}

dhuuid=$(reverse_uuid $(cat /sys/devices/virtual/dmi/id/product_uuid))
dhcpid=$(mktemp)
mkdir -p /etc/confluent
cp /tls/* /etc/ssl/certs/
for nic in $(ip link | grep mtu|grep -v LOOPBACK|cut -d: -f 2|sed -e 's/ //'); do
     ip link set $nic up
done
for nic in $(ip link | grep mtu|grep -v LOOPBACK|grep LOWER_UP|cut -d: -f 2|sed -e 's/ //'); do
    if udhcpc -i $nic -p $dhcpid -t 2 -T 2 -n -x 93:0007 -x 97:00$dhuuid -q; then
         /opt/confluent/bin/copernicus > /etc/confluent/confluent.info
         if grep ^MANAGER:.*\\. /etc/confluent/confluent.info ; then
             break
         fi
    fi
    ip -4 flush dev $nic
done    
mgr=$(grep ^MANAGER:.*\\. /etc/confluent/confluent.info|head -n 1|cut -d: -f 2|sed -e 's/ //')
nodename=$(grep ^NODENAME: /etc/confluent/confluent.info|head -n 1|cut -d: -f 2|sed -e 's/ //')
/opt/confluent/bin/clortho $nodename $mgr > /etc/confluent/confluent.apikey
apikey=$(cat /etc/confluent/confluent.apikey)
cd /etc/confluent
wget --header="CONFLUENT_NODENAME: $nodename" --header="CONFLUENT_APIKEY: $apikey" https://$mgr/confluent-api/self/deploycfg
cd -
predir=$(mktemp -d)
cd $predir
profile=$(grep ^profile: /etc/confluent/deploycfg|cut -d ' ' -f 2)
wget https://$mgr/confluent-public/os/$profile/scripts/pre.sh
chmod u+x pre.sh
wget https://$mgr/confluent-public/os/$profile/preseed.cfg
mv preseed.cfg /
setdebopt auto-install/enable true boolean
setdebopt partman/early_command  $predir/pre.sh string
cd -
ip -4 a flush dev $nic
setdebopt netcfg/choose_interface $nic select
setdebopt netcfg/get_hostname $nodename string
v4cfgmeth=$(grep ipv4_method: /etc/confluent/deploycfg |cut -d: -f 2|sed -e 's/ //')
if [ "$v4cfgmeth" = "static" ]; then
    setdebopt netcfg/disable_dhcp true boolean
    v4addr=$(grep ^ipv4_address: /etc/confluent/deploycfg|cut -d: -f 2|sed -e 's/ //')
    v4gw=$(grep ^ipv4_gateway: /etc/confluent/deploycfg|cut -d: -f 2| sed -e 's/ //')
    if [ "$v4gw" = "null" ]; then
        v4gw=""
    fi
    v4nm=$(grep ^ipv4_netmask: /etc/confluent/deploycfg|cut -d: -f 2|sed -e 's/ //')
    setdebopt netcfg/get_netmask $v4nm string
    setdebopt netcfg/get_ipaddress $v4addr string
    setdebopt netcfg/confirm_static true boolean
    if [ ! -z "$v4gw" ]; then
        setdebopt netcfg/get_gateway $v4gw string
    fi
    namesrvs=$(sed -n '/^nameservers:/,/^[^-]/p' /etc/confluent/deploycfg|grep ^- | cut -d ' ' -f 2|sed -e 's/ //')
    for namesrv in "$namesrvs"; do
        setdebopt netcfg/get_nameservers $namesrv string
    done
elif [ "$v4cfgmeth" = "dhcp" ]; then
    setdebopt netcfg/disable_dhcp false boolean
    setdebopt netcfg/confirm_static false boolean
fi
rootpass=$(grep ^rootpassword: /etc/confluent/deploycfg|cut -d ' ' -f 2|sed -e 's/ //')
if [ "$rootpass" = null ] || [ -z "$rootpass" ]; then
    setdebopt passwd/root-login false boolean
else
    setdebopt passwd/root-login true boolean
    setdebopt passwd/root-password-crypted $rootpass string
fi
setdebopt time/zone $(grep ^timezone: /etc/confluent/deploycfg|cut -d ' ' -f 2|sed -e 's/ //') string
ntpsrvs=$(sed -n '/^ntpservers:/,/^[^-]/p' /etc/confluent/deploycfg|grep ^- | cut -d ' ' -f 2|sed -e 's/ //')
for ntpsrv in "$ntpsrvs"; do
    setdebopt clock-setup/ntp true boolean
    setdebopt clock-setup/ntep-server $ntpsrv string
done
#setdebopt console-setup/layoutcode $(grep ^keymap: /etc/confluent/deploycfg|cut -d ' ' -f 2) string
setdebopt debian-installer/locale $(grep ^locale: /etc/confluent/deploycfg|cut -d ' ' -f 2) select
domainname=$(grep ^dnsdomain: /etc/confluent/deploycfg|cut -d ' ' -f 2)
if [ ! -z "$domainname" ] && [ "$domainname" != "null" ]; then
    setdebopt netcfg/get_domain $domainname string
fi