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Re: [Xen-users] Xen 4.2.2 /etc/init.d/xendomains save and restore of domains does not work

Hello Ian,

On 06/30/13 17:30, Ian Murray wrote:
On 30/06/13 10:49, Andreas Greve wrote:

in the last days I switched from Xen 4.2.1 to Xen 4.2.2 (source from git repository tag 4.2.2)

commit a125ec6a4a2f028f97f0bdd8946d347a36dbe76b
Author: Jan Beulich <jbeulich@xxxxxxxx>
Date:   Tue Apr 23 18:42:55 2013 +0200

    update Xen version to 4.2.2

My "base system" is a debian squeeze. For Xen I use the xl toolstack.

Since updating to 4.2.2 the autosave and autorestore of domains dos not work any more.

The reason is that there are some bugs in /etc/init.d/xendomains

At the end of the mail there is a diff of my corrections. The correction are only tested on my system under xl toolstack

There are some fixes going into Xen 4.3. My suggestion would be try one commit after RC6, namely...


I download the file by from git and give him a chance. It works nearly perfect.
On xendomains stop there was all ok.

On xendomains start it restores the saved domains but after that it tries to start them again and produce some error messages like domain is already running.

The reason is  the sed script in rdname() does not work with xl output.
I'll changed it in the way as you have done with HEADCOMP (see the diff below).
After that all was nice for me

root@srv01:/etc/init.d# diff -u .xendomains.4.3.original xendomains
--- .xendomains.4.3.original    2013-06-30 20:54:14.000000000 +0200
+++ xendomains  2013-06-30 23:27:44.000000000 +0200
@@ -31,11 +31,13 @@

+RDNAMESED='s/^.*(name \(.*\))$/\1/p'
 $CMD list &> /dev/null
 if test $? -ne 0
        HEADCOMP="Xen saved domain"
+        RDNAMESED='s/^.*"name": "\(.*\)",$/\1/p'

 $CMD list &> /dev/null
@@ -185,8 +187,8 @@
 # read name from xen config file
-    NM=$($CMD create --quiet --dryrun --defconfig "$1" |
-         sed -n 's/^.*(name \(.*\))$/\1/p')
+    NM=$( $CMD create --quiet --dryrun --defconfig "$1" |
+         sed -n "${RDNAMESED}" )


I am surprised you did not have issue with 4.2.1 because the header issues have been present ever since xl became the default/preferred toolstack, unless your Xen 4.2.1 came from a third-party.
Your are right I remember that there were some problems with 4.2.1 too. As I switched from 4.1 to 4.2.1.

Sorry at that time I had not much time. If I remember right, I fixed that in any way for me, but forget to report.

Thanks for your help. I learned a lot about bash (bla) seams to be equal to bla) in case instructions. That was new for me.

Best wishes


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