xvm-iscsi-config: don't restart on upgrade, only first install

[invirt/packages/xvm-iscsi-config.git] / debian / xvm-iscsi-config.postinst

diff --git a/debian/xvm-iscsi-config.postinst b/debian/xvm-iscsi-config.postinst
index 12226e3..e7e9faf 100755 (executable)
--- a/debian/xvm-iscsi-config.postinst
+++ b/debian/xvm-iscsi-config.postinst
@@ -41,9 +41,22 @@ iscsi:
  username: $USERNAME
  password: $PASSWORD
 EOF
-        invoke-rc.d xvm-iscsi-config restart
-        invoke-rc.d open-iscsi restart
-        iscsiadm -m discovery -t st -p $(invirt-getconf iscsi.address):3260
+        if [ -z "$2" ]; then
+            invoke-rc.d xvm-iscsi-config restart
+            invoke-rc.d open-iscsi restart
+            iscsiadm -m discovery -t st -p $(invirt-getconf iscsi.address):3260
+        else
+            # Don't disrupt an existing installation.
+            cat <<EOF
+xvm-iscsi-config: If the configuration has changed, restart iscsi:
+  /etc/init.d/xvm-iscsi-config restart
+  /etc/init.d/open-iscsi restart
+  iscsiadm -m discovery -t st -p $(invirt-getconf iscsi.address):3260
+  lvchange -a ln /dev/xenvg && lvchange -a y /dev/xenvg
+This will leave VMs unable to access their disks, so migrate them first.
+
+EOF
+        fi
     ;;
 
     abort-upgrade|abort-remove|abort-deconfigure)