Configure DHCP server

build.sh

@@ -244,6 +244,8 @@ chmod 644        "$ROOTFS_DIR/etc/hostname"
 
 echo "127.0.1.1 $HOSTNAME" >>"$ROOTFS_DIR/etc/hosts"
 
+install -m 644 files/interfaces.d/eth0 "$ROOTFS_DIR/etc/network/interfaces.d/"
+
 ##
 # Add user.
 #
@@ -318,6 +320,18 @@ systemctl disable hwclock.sh
 fake-hwclock save
 EOF
 
+##
+# ISC DHCP server
+#
+on_chroot << EOF
+apt-get install -y isc-dhcp-server
+EOF
+
+apply_patch '06-dhcp-server.diff'
+
+install -d                                          "$ROOTFS_DIR/etc/dhcp/dhcpd.conf.d/"
+install -m 644 files/dhcpd.conf.d/192.168.82.0.conf "$ROOTFS_DIR/etc/dhcp/dhcpd.conf.d/"
+
 ##
 # Unmount virtual file systems.
 #

files/dhcpd.conf.d/192.168.82.0.conf

@@ -0,0 +1,6 @@
+subnet 192.168.82.0 netmask 255.255.255.0 {
+  range 192.168.82.2 192.168.82.254;
+
+  option routers           192.168.82.1;
+  option broadcast-address 192.168.82.255;
+}

files/interfaces.d/eth0

@@ -0,0 +1,8 @@
+auto eth0
+allow-hotplug eth0
+iface eth0 inet static
+  netmask   255.255.255.0
+  network   192.168.82.0
+  gateway   192.168.82.1
+  broadcast 192.168.82.255
+  address   192.168.82.1

patches/06-dhcp-server.diff

@@ -0,0 +1,36 @@
+--- rootfs.orig/etc/dhcp/dhcpd.conf
++++ rootfs/etc/dhcp/dhcpd.conf
+@@ -10,20 +10,22 @@
+ ddns-update-style none;
+ 
+ # option definitions common to all supported networks...
+-option domain-name "example.org";
+-option domain-name-servers ns1.example.org, ns2.example.org;
++option domain-name "barnacleos.local";
++option domain-name-servers 8.8.8.8, 8.8.4.4;
+ 
+ default-lease-time 600;
+ max-lease-time 7200;
+ 
+ # If this DHCP server is the official DHCP server for the local
+ # network, the authoritative directive should be uncommented.
+-#authoritative;
++authoritative;
+ 
+ # Use this to send dhcp log messages to a different log file (you also
+ # have to hack syslog.conf to complete the redirection).
+ log-facility local7;
+ 
++include "/etc/dhcp/dhcpd.conf.d/192.168.82.0.conf";
++
+ # No service will be given on this subnet, but declaring it helps the 
+ # DHCP server to understand the network topology.
+ 
+--- rootfs.orig/etc/default/isc-dhcp-server
++++ rootfs/etc/default/isc-dhcp-server
+@@ -18,4 +18,4 @@
+ 
+ # On what interfaces should the DHCP server (dhcpd) serve DHCP requests?
+ #	Separate multiple interfaces with spaces, e.g. "eth0 eth1".
+-INTERFACES=""
++INTERFACES="eth0"

patches/series

@@ -3,3 +3,4 @@
 03-useradd.diff
 04-swap.diff
 05-path.diff
+06-dhcp-server.diff