[Libguestfs] [PATCH v3 1/4] appliance: Use dhclient or dhcpcd instead of hard-coding IP address of appliance.

[Richard W.M. Jones]

qemu in SLIRP mode offers DHCP services to the appliance.  We don't
use them, but use a fixed IP address intead.  This changes the
appliance to get its IP address using DHCP.

Note: This is only used when the network is enabled.  dhclient is
somewhat slower, but the penalty (a few seconds) is only paid for
network users.

On SuSE or other distros, dhcpcd could be used if available.
---
 appliance/init           | 13 +++++++------
 appliance/packagelist.in |  6 ++++++
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/appliance/init b/appliance/init
index 6d62338..f719a72 100755
--- a/appliance/init
+++ b/appliance/init
@@ -79,12 +79,13 @@ hwclock -u -s
 ip addr add 127.0.0.1/8 brd + dev lo scope host
 ip link set dev lo up
 
-ip addr add 169.254.2.10/16 brd + dev eth0 scope global
-ip link set dev eth0 up
-
-ip route add default via 169.254.2.2
-
-echo nameserver 169.254.2.3 > /etc/resolv.conf
+if grep -sq guestfs_network=1 /proc/cmdline; then
+    if dhclient --version >/dev/null 2>&1; then
+        dhclient
+    else
+        dhcpcd
+    fi
+fi
 
 # Scan for MDs.
 mdadm -As --auto=yes --run
diff --git a/appliance/packagelist.in b/appliance/packagelist.in
index 276b4c2..27bcc11 100644
--- a/appliance/packagelist.in
+++ b/appliance/packagelist.in
@@ -27,6 +27,7 @@ ifelse(REDHAT,1,
   btrfs-progs
   cryptsetup
   cryptsetup-luks      dnl old name used before Fedora 17
+  dhclient
   dnl e4fsprogs only exists on RHEL 5, will be ignored everywhere else.
   e4fsprogs
   genisoimage
@@ -73,6 +74,7 @@ dnl iproute has been renamed to iproute2
   iputils-ping
   iputils-arping
   iputils-tracepath
+  isc-dhcp-client
   libaugeas0
   libc-bin
   libcap2
@@ -102,6 +104,7 @@ ifelse(ARCHLINUX,1,
   btrfs-progs
   cdrkit
   cryptsetup
+  dhclient
   grub
   hivex
   iproute2
@@ -130,6 +133,7 @@ ifelse(SUSE,1,
   augeas-lenses
   btrfsprogs
   cryptsetup
+  dhcpcd
   genisoimage
   glibc-locale
   gptfdisk
@@ -150,6 +154,7 @@ ifelse(FRUGALWARE,1,
   btrfs-progs
   cryptsetup-luks
   cdrkit
+  dhclient
   grub2
   hfsplus
   iproute2
@@ -177,6 +182,7 @@ ifelse(MAGEIA,1,
   chkconfig /* for /etc/init.d */
   cdrkit-genisoimage
   cdrkit-isotools
+  dhclient
   extlinux
   gfs2-utils
   grub
-- 
2.0.4