I may come close to the full support finally

debian/control

@@ -9,7 +9,7 @@ Vcs-Git: https://git.wit.com/netops/wit-network-config
 
 Package: wit-network-config
 Architecture: all
-Depends: ${misc:Depends}, frr (>= 4.0-wit), sed, tcpdump, mtr-tiny, iproute2, ifupdown, ipmitool, iptables, lldpd, strongswan, telnet, netcat, fping, curl, wget, ifstat, rsyslog, ncurses-term, net-tools, bridge-utils, vlan, gnupg, sudo, isc-dhcp-client
+Depends: ${misc:Depends}, sed, tcpdump, mtr-tiny, iproute2, ifupdown, ipmitool, iptables, lldpd, strongswan, telnet, netcat, fping, curl, wget, ifstat, rsyslog, ncurses-term, net-tools, bridge-utils, vlan, gnupg, sudo, isc-dhcp-client
 Provides: ${diverted-files}
 Conflicts: ${diverted-files}, dhcpcd5
 Description: configure network for a standard wit compute and/or data node

debian/wit-network-config.install

@@ -2,6 +2,7 @@ files/vrf.conf etc/iproute2/rt_tables.d
 files/vrf-dhcp-enter etc/dhcp/dhclient-enter-hooks.d
 files/vrf-dhcp-exit etc/dhcp/dhclient-exit-hooks.d
 files/dhcp-sethostname etc/dhcp/dhclient-exit-hooks.d
+files/dhcp-loopback etc/dhcp/dhclient-exit-hooks.d
 files/rc.local etc
 files/10-frr.conf etc/sysctl.d
 files/11-mgmt1.conf etc/sysctl.d

debian/wit-network-config.postinst

@@ -24,24 +24,16 @@ case "$1" in
 
      ### START gather all the info from the box and generate the variabels
 
+        source /etc/wit-net.conf
+	if [ -z $LOOPBACKv4 ]; then
+	    echo "LOOPBACK not provided by DHCP"
+	    exit 2
+        fi
 
-
-        [ -z $NODE_ID ] && export NODE_ID=$(ip -4 -br addr | grep 10.0. | awk '{ print $3 }' | awk 'BEGIN{FS="[./]"} { print $4 }')
+	export TIER_ID=$(echo $LOOPBACKv4 | cut -d . -f 3)
+	export NODE_ID=$(echo $LOOPBACKv4 | cut -d . -f 4)
 
         export DOMAINNAME=${HOSTNAME#*.}
-        export MGMT_MAC=$(ip -br link show dev $(ip -4 -br addr | grep 10.0. | awk '{ print $1 }') | awk '{ print $3 }')
-
-
-        [ ${HOSTNAME:0:4} = vtep ] && export HOSTTYPE=hypervisor
-        [ ${HOSTNAME:0:1} = h ] && export HOSTTYPE=hypervisor
-        [ ${HOSTNAME:0:1} = d ] && export HOSTTYPE=datanode
-
-        [ $HOSTTYPE = hypervisor -a $DOMAINNAME = usw1.wit.com ] && export TIER_ID=2
-        [ $HOSTTYPE = datanode   -a $DOMAINNAME = usw1.wit.com ] && export TIER_ID=4
-        [ $HOSTTYPE = hypervisor -a $DOMAINNAME = usw2.wit.com ] && export TIER_ID=18
-        [ $HOSTTYPE = datanode   -a $DOMAINNAME = usw2.wit.com ] && export TIER_ID=20
-
-	[ $HOSTTYPE != hypervisor -a $HOSTTYPE != datanode ] && sed -ie "s/^TIER_ID.*/TIER_ID=$TIER_ID/; t; $ s/$/\nTIER_ID=$TIER_ID/" /etc/environment
 
         if [ -z "$TIER_ID" ]; then
             echo "Unable to autodetect TIER_ID, looks like we deal with a special node, please set in environment"
@@ -53,9 +45,10 @@ case "$1" in
         fi
 
         export NODE_ASN="4200$(printf "%03d" $TIER_ID)$(printf "%03d" $NODE_ID)"
-	export LOOPBACKv4="10.1.$TIER_ID.$NODE_ID"
 	export LOOPBACKv6="2604:bbc0::$TIER_ID:$NODE_ID"
 
+        MGMT_MAC=$(ip -br link show dev $(ip -4 -br addr | grep 10.0. | awk '{ print $1 }') | awk '{ print $3 }')
+
      ## END variables
 
 

debian/wit-network-config.preinst

@@ -16,6 +16,15 @@ set -e
 
 case "$1" in
     install|upgrade)
+	source /etc/wit-net.conf
+	if [ -z $LOOPBACKv4 ]; then
+	    echo "LOOPBACK NOT CONFIGURED, aborting..."
+	    exit 2
+	fi
+	if [[ $LOOPBACKv4 = "10.1."* ]]; then
+	    echo "only 10.1.x.y loopbacks supported at the moment"
+	    exit 3
+	fi
         systemctl stop systemd-networkd.socket
         systemctl stop systemd-networkd.service
         systemctl stop systemd-networkd-wait-online

debian/wit-network-config.transform

@@ -1,4 +1,4 @@
 /etc/systemd/timesyncd.conf.wit sed -e 's/#NTP=.*/NTP=ipv6.ntp.ubuntu.com/g'
 /etc/frr/daemons.wit sed -e 's/bgpd=no/bgpd=yes/' -e 's/zebra=no/zebra=yes/'
 /etc/bash.bashrc.wit sed -e 's/.*witaddon/source \/etc\/bashrc-witaddon/; t; $ s/$/\nsource \/etc\/bashrc-witaddon/'
-/etc/dhcp/dhclient.conf.wit sed -e '/option.*tier-id/d;t;1s/^/option tier-id code 225 = unsigned integer 8;\n/'
+/etc/dhcp/dhclient.conf.wit sed -e '/^option.*loopbackv4/d;' | sed -e '1s/^/option loopbackv4 code 225 = ip-address;\n/;'

files/dhcp-loopback

@@ -1,6 +1,6 @@
 #!/bin/bash
+sed -ie '/^LOOPBACKv4.*/d' /etc/wit-net.conf
 
-if [ ! -z $new_tier_id ]; then
-   sed -ie '/^TIER_ID=.*/d' /etc/environment
-   echo "TIER_ID=$new_tier_id" >>/etc/environment
+if [ ! -z $new_loopbackv4 ]; then
+   echo "LOOPBACKv4=$new_loopbackv4" >>/etc/wit-net.conf
 fi