added config-warewulf

container-scripts/config-warewulf

@@ -0,0 +1,73 @@
+#!/bin/sh
+# Helper functions
+# Get the mask form prefix
+cdr2mask()
+{
+   # Number of args to shift, 255..255, first non-255 byte, zeroes
+   set -- $(( 5 - ($1 / 8) )) 255 255 255 255 $(( (255 << (8 - ($1 % 8))) & 255 )) 0 0 0
+   [ $1 -gt 1 ] && shift $1 || shift
+   echo ${1-0}.${2-0}.${3-0}.${4-0}
+}
+# Get the ip4 address of the netork
+network_address() {
+    declare address prefix_length
+    IFS=/ read address prefix_length <<< "$1"
+
+    declare -a octets
+    IFS=. read -a octets <<< "$address"
+
+    declare mask
+    mask=$( printf "%08x" $(( (1 << 32) - (1 << (32 - prefix_length)) )) )
+
+    declare -i i
+    for i in {0..3}; do octets[$i]=$(( octets[i] & 16#${mask:2*i:2} )); done
+
+    echo $( IFS=.; echo "${octets[*]}" )
+}
+echo "-- WW4 CONFIGURAION $* --"
+
+# Make sure that a ip address was defined for out network so that 
+# we can configure dhcpd correctly
+IP4CIDR=`ip addr | awk '/scope global/ {print $2;exit}'`
+IP4=${IP4CIDR%/*}
+IP4PREFIX=${IP4CIDR#*/}
+IP4MASK=$(cdr2mask $IP4PREFIX)
+IP4NET=$(network_address "$IP4/$IP4PREFIX")
+
+if [ "$IP4PREFIX" -gt 25 ] ; then
+  echo "ERROR: warewulf does at least a /25 network for dynamic addresses"
+  exit 1
+fi
+
+DYNSIZE=100
+DYNSTART=${IP4#*.*.*.}
+DYNPRE=${IP4%.*}
+DYNEND=$(( $DYNSTART + $DYNSIZE ))
+if [ $DYNEND -gt 254 ] ; then
+  DYNEND=$(( $IPNET + 2 + $DYNSIZE ))
+  DYNSTART=$(( $IPNET + 2 ))
+fi
+DYNSTART="${DYNPRE}.${DYNSTART}"
+DYNEND="${DYNPRE}.${DYNEND}"
+
+
+WW4CONF=/etc/warewulf/warewulf.conf
+if [ -e $WW4CONF ] ; then
+  test -n $IP4 && sed -i 's/^ipaddr: EMPTY/ipaddr: '$IP4'/' $WW4CONF
+  test -n $IP4MASK && sed -i 's/^netmask: EMPTY/netmask: '$IP4MASK'/' $WW4CONF
+  test -n $IP4NET && sed -i 's/^network: EMPTY/network: '$IP4NET'/' $WW4CONF 
+  test -n $DYNSTART && sed -i 's/^  range start: EMPTY/  range start: '$DYNSTART'/' $WW4CONF 
+  test -n $DYNEND && sed -i 's/^  range end: EMPTY/  range end: '$DYNEND'/' $WW4CONF 
+  cat << EOF
+ipaddr: $IP4
+netmask: $IP4MASK
+network: $IP4NET
+  range start: $DYNSTART
+  range end: $DYNEND
+EOF
+fi
+
+# configure the services of the host by building the host overlay
+echo "-- Running wwctl --"
+wwctl overlay build
+wwctl configure tftp