todo: Add note about using blktrace.

[libguestfs.git] / appliance / init

diff --git a/appliance/init b/appliance/init
index b8133ca..d7fe24e 100755 (executable)
--- a/appliance/init
+++ b/appliance/init
@@ -7,6 +7,7 @@ export PATH
 
 mkdir -p /sysroot
 
+rm -f /proc; mkdir /proc
 mount -t proc /proc /proc
 mount -t sysfs /sys /sys
 
@@ -67,46 +68,53 @@ lvm vgchange -ay --ignorelockingfailure
 for f in /sys/block/vd*/queue/rotational; do echo 1 > $f; done
 
 # http://kbase.redhat.com/faq/docs/DOC-5428
-for f in /sys/block/[hsv]d*/queue/scheduler; do echo noop > $f; done
-
-# Keep these to enhance the usefulness of debug output.
-ls -l /dev
-cat /proc/mounts
-lvm pvs
-lvm vgs
-lvm lvs
-ifconfig
-netstat -rn
-lsmod
-#hwclock -r
-date
-#ping -n -v -c 5 10.0.2.2
-#ping -n -v -c 5 10.0.2.4
-
-echo -n "uptime: "; cat /proc/uptime
+# Disabled this until https://bugzilla.redhat.com/show_bug.cgi?id=630583
+# is fixed (broken in Linux 2.6.36).
+#for f in /sys/block/[hsv]d*/queue/scheduler; do echo noop > $f; done
+
+# These are useful when debugging.
+if grep -sq guestfs_verbose=1 /proc/cmdline; then
+    ls -lR /dev
+    cat /proc/mounts
+    lvm pvs
+    lvm vgs
+    lvm lvs
+    ifconfig
+    netstat -rn
+    lsmod
+    #hwclock -r
+    date
+    #ping -n -v -c 5 10.0.2.2
+    #ping -n -v -c 5 10.0.2.4
+
+    echo -n "uptime: "; cat /proc/uptime
+fi
 
 if ! grep -sq guestfs_rescue=1 /proc/cmdline; then
-  exec guestfsd -f
+  # The host will kill qemu abruptly if guestfsd shuts down normally
+  guestfsd -f
+
+  # Otherwise we try to clean up gracefully. For example, this ensures that a
+  # core dump generated by the guest daemon will be written to disk.
+else
+  # Use appliance in rescue mode, also used by the virt-rescue command.
+  eval $(grep -Eo 'TERM=[^[:space:]]+' /proc/cmdline)
+  PS1='><rescue> '
+  export TERM PS1
+  echo
+  echo "------------------------------------------------------------"
+  echo
+  echo "Welcome to virt-rescue, the libguestfs rescue shell."
+  echo
+  echo "Note: The contents of / are the rescue appliance."
+  echo "You have to mount the guest's partitions under /sysroot"
+  echo "before you can examine them."
+  echo
+  bash -i
+  echo
+  echo "virt-rescue: Syncing the disk now before exiting ..."
+  echo
 fi
 
-# Use appliance in rescue mode, also used by the virt-rescue command.
-eval $(grep -Eo 'TERM=[^[:space:]]+' /proc/cmdline)
-PS1='><rescue> '
-export TERM PS1
-echo
-echo "------------------------------------------------------------"
-echo
-echo "Welcome to virt-rescue, the libguestfs rescue shell."
-echo
-echo "Note: The contents of / are the rescue appliance."
-echo "You have to mount the guest's partitions under /sysroot"
-echo "before you can examine them."
-echo
-bash -i
-echo
-echo "virt-rescue: Syncing the disk now before exiting ..."
-echo "(Don't worry if you see a 'Kernel panic' message below)"
-echo
-sync
-sleep 1
 sync
+/sbin/reboot -f