- fixes as requested from Zelja

diff --git a/debian/postinst b/debian/postinst
index 29e424e..b14bd1f 100755 (executable)
--- a/debian/postinst
+++ b/debian/postinst
@@ -101,6 +101,17 @@ fi
 
 ################################################################################
 
+# check if we are under Xen DomU PV
+# (perhaps check /sys/hypervisor/uuid in the future)
+
+GRUB_MBR="yes"
+if [ \( -w /dev/xvda \) -o \( -w /dev/xvdb \) ]; then
+    echo "CN: Detected DomU instance, won't install Grub MBR."
+    GRUB_MBR="no"
+fi
+
+################################################################################
+
 # intro msg
 echo -n "CN: Configuring system (this will take a while):"
 
@@ -224,10 +235,10 @@ if [ "x$GRUB2" = "xno" ]; then
     if [ ! -x /usr/sbin/grub ]; then
         echo "."
         echo "CN: FATAL ERROR while trying to execute GRUB1!"
-        echo "CN: Do not reboot your server and report this to OTRS immediately!"
+        echo "CN: Do not reboot your server and report this to syshelp@carnet.hr immediately!"
         exit 1
     fi
-    grub --batch --no-floppy --device-map="$device_map" <<'EOF' >/dev/null 2>&1
+    grub --batch --no-floppy --device-map="$device_map" <<'EOF' >/dev/null 2>&1 || true
 quit
 EOF
     if [ ! -s "$device_map" ]; then
@@ -240,8 +251,8 @@ EOF
     fi
 else
     # Grub2 part
-    grub-mkdevicemap --no-floppy
-    grub-install --no-floppy --grub-setup=/bin/true "$(grub-probe -t drive /boot/grub)" >/dev/null 2>&1
+    grub-mkdevicemap --no-floppy >/dev/null 2>&1 || true
+    grub-install --no-floppy --grub-setup=/bin/true "$(grub-probe -t drive /boot/grub)" >/dev/null 2>&1 || true
 fi
 echo -n " grub3"
 
@@ -256,7 +267,7 @@ if [ "x$GRUB2" = "xno" ]; then
     if [ -z "$install_device" ]; then
         echo "."
         echo "CN: FATAL ERROR while detecting boot disk!"
-        echo "CN: Do not reboot your server and report this to OTRS immediately!"
+        echo "CN: Do not reboot your server and report this to syshelp@carnet.hr immediately!"
         exit 1
     fi
 
@@ -280,15 +291,16 @@ else
 fi
 echo -n " grub4"
 
-# install GRUB loader
-# this will work for both Grub1 and Grub2
-if ! grub-install --no-floppy "$install_device" >/dev/null 2>&1; then
-    echo "."
-    echo "CN: FATAL ERROR while running grub-install on $install_device!"
-    echo "CN: Do not reboot your server and report this to OTRS immediately!"
-    exit 1
+# install GRUB loader: this will work for both Grub1 and Grub2
+if [ "x$GRUB_MBR" = "xyes" ]; then
+    if ! grub-install --no-floppy "$install_device" >/dev/null 2>&1; then
+        echo "."
+        echo "CN: FATAL ERROR while running grub-install on $install_device!"
+        echo "CN: Do not reboot your server and report this to syshelp@carnet.hr immediately!"
+        exit 1
+    fi
+    echo -n " grub5"
 fi
-echo -n " grub5"
 
 # fix possible wrong params in menu.lst
 if [ "x$GRUB2" = "xno" ]; then
@@ -333,18 +345,20 @@ fi
 echo -n " grub7"
 
 # install to other boot sectors if needed (better safe than sorry)
-if [ "x$GRUB2" = "xyes" ]; then
-    # Grub2 part
-    db_get grub-pc/install_devices
-    for i in `echo $RET | sed -e 's/,/ /g'`; do
-        real_device="$(readlink -f "$i")"
-        if [ -e "$real_device" ]; then
-            grub-install --force --no-floppy $real_device \
-                >/dev/null 2>&1 || true
-        fi
-    done
+if [ "x$GRUB_MBR" = "xyes" ]; then
+    if [ "x$GRUB2" = "xyes" ]; then
+        # Grub2 part
+        db_get grub-pc/install_devices
+        for i in `echo $RET | sed -e 's/,/ /g'`; do
+            real_device="$(readlink -f "$i")"
+            if [ -e "$real_device" ]; then
+                grub-install --force --no-floppy $real_device \
+                    >/dev/null 2>&1 || true
+            fi
+        done
+    fi
+    echo -n " grub8"
 fi
-echo -n " grub8"
 
 # disable lilo
 if [ -e /etc/lilo.conf ]; then
@@ -405,7 +419,7 @@ rm -f /etc/sysctl.conf.$$
 
 # old kernel params (skipping some of the obsolete or overrided entries)
 if [ -e /etc/sysctl.conf ]; then
-    egrep -v 'net\.core\.(r|w)mem_max|net\.ipv4\.tcp_(r|w)mem|vm\.bdflush|net\.ipv4\.ip_local_port_range|kernel\.rtsig-max|net\.ipv4\.tcp_syncookies|kernel\.exec-shield|net\.ipv4\.tcp_max_syn_backlog|net\.ipv4\.tcp_congestion_control|kernel\.exec-shield|kernel\.maps_protect' \
+    egrep -v 'net\.core\.(r|w)mem_max|net\.ipv4\.tcp_(r|w)mem|vm\.bdflush|net\.ipv4\.ip_local_port_range|kernel\.rtsig-max|net\.ipv4\.tcp_syncookies|kernel\.exec-shield|net\.ipv4\.tcp_max_syn_backlog|net\.ipv4\.tcp_congestion_control|kernel\.maps_protect' \
         /etc/sysctl.conf >> /etc/sysctl.conf.$$
 fi