Mailing List Archive: [Bug 1438] Cannot use pygrub with drbd blcok device as xvda.

[Bug 1438] Cannot use pygrub with drbd blcok device as xvda.

Jun 24, 2011, 1:52 PM

Post #1 of 3 (1116 views)

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1438

------- Comment #5 from themsley@voiceflex.com 2011-06-24 13:52 -------
The patch to pygrub here is broken for me on DRBD 8.0 and 8.3 on CentOS 5.6 and
on Ubuntu 8.04 LTS. It uses

drbdresource = string.strip(os.popen('drbdadm sh-resources ' +
file).readline(), " \n")

to get info about the resource it wants but drbdadm sh-resources silently
ignores any arguments passed to it and displays ALL DRBD resources. This list
later gets passed to drbdadm primary which makes all DRBD resources on this
host primary (or attempts to). This is incorrect behaviour - indeed, it's very
bad!

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[Bug 1438] Cannot use pygrub with drbd blcok device as xvda. [ In reply to ]

bugzilla-daemon at lists

Jun 24, 2011, 2:00 PM

Post #2 of 3 (1113 views)

Permalink

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1438

------- Comment #6 from themsley@voiceflex.com 2011-06-24 14:00 -------
A patch for the patches attached here says something like this

--- pygrub 2011-06-24 21:54:52.000000000 +0100
+++ /usr/bin/pygrub 2011-06-24 21:56:44.000000000 +0100
@@ -679,8 +688,9 @@
"""
drbdcount = string.strip(os.popen('drbdadm sh-dev all | grep ' + file + '
| wc -l').readline(), " \n")
if drbdcount == '1':
- drbdresource = string.strip(os.popen('drbdadm sh-resources ' +
file).readline(), " \n")
- peerstate = string.strip(os.popen('drbdadm state ' +
drbdresource).readline(), " \n").lower().split("/",1)[0]
+ minor = file[9:]
+ drbdresource = string.strip(os.popen('drbdadm sh-resource minor-' +
minor).readline(), " \n")
+ peerstate = string.strip(os.popen('drbdadm role ' +
drbdresource).readline(), " \n").lower().split("/",1)[0]

if peerstate == "unknown":
print "DRBD resource " + drbdresource + " is " + peerstate + " on
peer. Maybe split brain state?"

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[Bug 1438] Cannot use pygrub with drbd blcok device as xvda. [ In reply to ]

bugzilla-daemon at lists

Jun 24, 2011, 6:46 PM

Post #3 of 3 (1104 views)

Permalink

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1438

------- Comment #7 from deshantm@gmail.com 2011-06-24 18:46 -------
Bugzilla is not heavily used. Did you report this to the xen-devel mailing
list?

http://wiki.xen.org/xenwiki/ReportingBugs

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