Adding support for deriving IP interface addresses from DNS.

Signed-off-by: Daniel Baumann <daniel.baumann@open-infrastructure.net>

3 files changed, 60 insertions, 2 deletions

diff --git a/share/build-scripts/debconf.d/0002-preseed-debconf b/share/build-scripts/debconf.d/0002-preseed-debconf
index 4bc4da6..3f1af64 100755
--- a/share/build-scripts/debconf.d/0002-preseed-debconf
+++ b/share/build-scripts/debconf.d/0002-preseed-debconf
@@ -83,21 +83,25 @@ do
 
 	if [ -n "${DIG}" ]
 	then
-		IPV4_ADDRESS1="$(${DIG} A +short ${NAME} | tail -n1)"
+		IPV4_ADDRESS1_DNS="${IPV4_ADDRESS1_DNS:-${NAME}}"
+		IPV4_ADDRESS1="$(${DIG} A +short ${IPV4_ADDRESS1_DNS} | tail -n1)"
 		IPV4_ADDRESS1_PART1="$(echo ${IPV4_ADDRESS1} | cut -d. -f1)"
 		IPV4_ADDRESS1_PART2="$(echo ${IPV4_ADDRESS1} | cut -d. -f2)"
 		IPV4_ADDRESS1_PART3="$(echo ${IPV4_ADDRESS1} | cut -d. -f3)"
 		IPV4_ADDRESS1_PART4="$(echo ${IPV4_ADDRESS1} | cut -d. -f4)"
 
-		IPV6_ADDRESS1="$(${DIG} AAAA +short ${NAME} | tail -n1)"
+		IPV6_ADDRESS1_DNS="${IPV6_ADDRESS1_DNS:-${NAME}}"
+		IPV6_ADDRESS1="$(${DIG} AAAA +short ${IPV6_ADDRESS1_DNS} | tail -n1)"
 	fi
 
 	sed -e "s|@NAME@|${NAME}|g" \
+	    -e "s|@IPV4_ADDRESS1_DNS@|${IPV4_ADDRESS1_DNS}|g" \
 	    -e "s|@IPV4_ADDRESS1@|${IPV4_ADDRESS1}|g" \
 	    -e "s|@IPV4_ADDRESS1_PART1@|${IPV4_ADDRESS1_PART1}|g" \
 	    -e "s|@IPV4_ADDRESS1_PART2@|${IPV4_ADDRESS1_PART2}|g" \
 	    -e "s|@IPV4_ADDRESS1_PART3@|${IPV4_ADDRESS1_PART3}|g" \
 	    -e "s|@IPV4_ADDRESS1_PART4@|${IPV4_ADDRESS1_PART4}|g" \
+	    -e "s|@IPV6_ADDRESS1_DNS@|${IPV6_ADDRESS1_DNS}|g" \
 	    -e "s|@IPV6_ADDRESS1@|${IPV6_ADDRESS1}|g" \
 	"${DEBCONF_PRESEED_FILE}" > "${DIRECTORY}/preseed.cfg"
 
diff --git a/share/build-scripts/debconf.d/0003-debconf b/share/build-scripts/debconf.d/0003-debconf
index c1c4e79..4b6a57f 100755
--- a/share/build-scripts/debconf.d/0003-debconf
+++ b/share/build-scripts/debconf.d/0003-debconf
@@ -680,10 +680,12 @@ Network_defaults ()
 	NETWORK1_BRIDGE="${NETWORK1_BRIDGE:-bridge0}"
 
 	NETWORK1_IPV4_METHOD="${NETWORK1_IPV4_METHOD:-dhcp}"
+	NETWORK1_IPV4_ADDRESS_DNS="${NETWORK1_IPV4_ADDRESS_DNS:-${NAME}}"
 	NETWORK1_IPV4_ADDRESS="${NETWORK1_IPV4_ADDRESS:-192.168.1.2}"
 	NETWORK1_IPV4_NETMASK="${NETWORK1_IPV4_NETMASK:-24}"
 
 	NETWORK1_IPV6_METHOD="${NETWORK1_IPV6_METHOD:-none}"
+	NETWORK1_IPV6_ADDRESS_DNS="${NETWORK1_IPV6_ADDRESS_DNS:-${NAME}}"
 	NETWORK1_IPV6_ADDRESS="${NETWORK1_IPV6_ADDRESS:-fc00::2}"
 	NETWORK1_IPV6_NETMASK="${NETWORK1_IPV6_NETMASK:-7}"
 
@@ -716,6 +718,9 @@ Network ()
 	db_get container/network1/ipv4-comment
 	NETWORK1_IPV4_COMMENT="${RET}" # string (w/ empty)
 
+	db_get container/network1/ipv4-address-dns
+	NETWORK1_IPV4_ADDRESS_DNS="${RET:-${NAME}}" # string (w/o empty)
+
 	db_get container/network1/ipv4-address
 	NETWORK1_IPV4_ADDRESS="${RET}" # string (w/o empty)
 
@@ -737,6 +742,9 @@ Network ()
 	db_get container/network1/ipv6-comment
 	NETWORK1_IPV6_COMMENT="${RET}" # string (w/ empty)
 
+	db_get container/network1/ipv6-address-dns
+	NETWORK1_IPV6_ADDRESS_DNS="${RET:-${NAME}}" # string (w/o empty)
+
 	db_get container/network1/ipv6-address
 	NETWORK1_IPV6_ADDRESS="${RET}" # string (w/o empty)
 
@@ -778,6 +786,9 @@ Network ()
 	db_set container/network1/ipv4-comment "${NETWORK1_IPV4_COMMENT}"
 	db_fset container/network1/ipv4-comment seen false
 
+	db_set container/network1/ipv4-address-dns "${NETWORK1_IPV4_ADDRESS_DNS}"
+	db_fset container/network1/ipv4-address-dns seen false
+
 	db_set container/network1/ipv4-address "${NETWORK1_IPV4_ADDRESS}"
 	db_fset container/network1/ipv4-address seen false
 
@@ -799,6 +810,9 @@ Network ()
 	db_set container/network1/ipv6-comment "${NETWORK1_IPV6_COMMENT}"
 	db_fset container/network1/ipv6-comment seen false
 
+	db_set container/network1/ipv6-address-dns "${NETWORK1_IPV6_ADDRESS_DNS}"
+	db_fset container/network1/ipv6-address-dns seen false
+
 	db_set container/network1/ipv6-address "${NETWORK1_IPV6_ADDRESS}"
 	db_fset container/network1/ipv6-address seen false
 
@@ -849,6 +863,10 @@ Network ()
 			db_go
 
 			db_settitle container/title
+			db_input high container/network1/ipv4-address-dns || true
+			db_go
+
+			db_settitle container/title
 			db_input high container/network1/ipv4-address || true
 			db_go
 
@@ -887,6 +905,10 @@ Network ()
 			db_go
 
 			db_settitle container/title
+			db_input high container/network1/ipv6-address-dns || true
+			db_go
+
+			db_settitle container/title
 			db_input high container/network1/ipv6-address || true
 			db_go
 
@@ -946,6 +968,11 @@ Network ()
 			eval NETWORK${NUMBER}_IPV4_METHOD="\"${RET}\"" # select
 		fi
 
+		if db_get container/network${NUMBER}/ipv4-address-dns
+		then
+			eval NETWORK${NUMBER}_IPV4_ADDRESS_DNS="\"${RET}\"" # string (w/ empty)
+		fi
+
 		if db_get container/network${NUMBER}/ipv4-address
 		then
 			eval NETWORK${NUMBER}_IPV4_ADDRESS="\"${RET}\"" # string (w/o empty)
@@ -984,6 +1011,11 @@ Network ()
 			eval NETWORK${NUMBER}_IPV6_METHOD="\"${RET}\"" # select
 		fi
 
+		if db_get container/network${NUMBER}/ipv6-address-dns
+		then
+			eval NETWORK${NUMBER}_IPV6_ADDRESS_DNS="\"${RET}\"" # string (w/ empty)
+		fi
+
 		if db_get container/network${NUMBER}/ipv6-address
 		then
 			eval NETWORK${NUMBER}_IPV6_ADDRESS="\"${RET}\"" # string (w/o empty)
@@ -1040,6 +1072,9 @@ Network ()
 		eval METHOD="$`echo NETWORK${NUMBER}_IPV4_METHOD`"
 		echo "NETWORK${NUMBER}_IPV4_METHOD=\"${METHOD}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
 
+		eval ADDRESS_DNS="$`echo NETWORK${NUMBER}_IPV4_ADDRESS_DNS`"
+		echo "NETWORK${NUMBER}_IPV4_ADDRESS_DNS=\"${ADDRESS_DNS}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
+
 		eval ADDRESS="$`echo NETWORK${NUMBER}_IPV4_ADDRESS`"
 		echo "NETWORK${NUMBER}_IPV4_ADDRESS=\"${ADDRESS}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
 
@@ -1061,6 +1096,9 @@ Network ()
 		eval METHOD="$`echo NETWORK${NUMBER}_IPV6_METHOD`"
 		echo "NETWORK${NUMBER}_IPV6_METHOD=\"${METHOD}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
 
+		eval ADDRESS_DNS="$`echo NETWORK${NUMBER}_IPV6_ADDRESS_DNS`"
+		echo "NETWORK${NUMBER}_IPV6_ADDRESS_DNS=\"${ADDRESS_DNS}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
+
 		eval ADDRESS="$`echo NETWORK${NUMBER}_IPV6_ADDRESS`"
 		echo "NETWORK${NUMBER}_IPV6_ADDRESS=\"${ADDRESS}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
 
diff --git a/share/build-scripts/debconf.d/0003-debconf.templates b/share/build-scripts/debconf.d/0003-debconf.templates
index 73952a8..73691ae 100644
--- a/share/build-scripts/debconf.d/0003-debconf.templates
+++ b/share/build-scripts/debconf.d/0003-debconf.templates
@@ -128,6 +128,14 @@ Description: Ethernet Interface Comment (IPv4)?
  .
  This defaults to empty.
 
+Template: container/network1/ipv4-address-dns
+Type: string
+Default:
+Description: IP Address from DNS (IPv4)?
+ Should the IP address automatically (based on the container name) derived from the DNS?
+ .
+ This defaults to empty.
+
 Template: container/network1/ipv4-address
 Type: string
 Default:
@@ -188,6 +196,14 @@ Description: Ethernet Interface Comment (IPv6)?
  .
  This defaults to empty.
 
+Template: container/network1/ipv6-address-dns
+Type: string
+Default:
+Description: IP Address from DNS (IPv6)?
+ Should the IP address automatically (based on the container name) derived from the DNS?
+ .
+ This defaults to empty.
+
 Template: container/network1/ipv6-address
 Type: string
 Default: