Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
DescriptionFederico Simoncelli
2013-05-08 13:17:07 UTC
Description of problem:
Sanlock should provide a way to request the release of a resource currently held by another host.
Additional info:
This feature is currently implemented in the daemon but it's not exposed through the python bindings. A patch has been posted upstream:
https://lists.fedorahosted.org/pipermail/sanlock-devel/2013-May/000367.html
As far as the use case is concerned this feature is probably dependent on some previous patches:
9863624 python: return lease version in read_resource
0ce413a python: add the versioning support to acquire
The API call named "request" (for consistency with the name exposed by the C API) is defined as follows:
request(lockspace, resource, disks [, action=REQ_RELEASE, version=0])
The possible values for action are REQ_RELEASE and REQ_FORCE (which escalates to sigkill if the regular graceful release is not satisfied).
Comment 2yeylon@redhat.com
2013-07-01 20:14:16 UTC
how do we test this?
Comment 3Federico Simoncelli
2013-07-01 21:15:43 UTC
(In reply to Yaniv Eylon from comment #2)
> how do we test this?
Using a shared storage, two hosts and sanlock commands (even better python scripts). We'll add the technical details (e.g. sanlock commands or python scripts) ASAP.
Here is a sequence of commands to test the capability without the need for a separate test program. It uses a shared vg "test" with a shared lv "test".
host1,2: service wdmd start
host1,2: service sanlock start
host1:
lvcreate -n test -L1G test
sanlock client init -s test:0:/dev/test/test:0
sanlock client init -r test:test:/dev/test/test:1048576
host1: sanlock client add_lockspace -s test:1:/dev/test/test:0
host2: sanlock client add_lockspace -s test:2:/dev/test/test:0
host1: sanlock client command -r test:test:/dev/test/test:1048576 -c /bin/sleep 1000
(This acquires the lock then runs "sleep" for 1000 seconds.)
host2: sanlock client request -r test:test:/dev/test/test:1048576:2 -f 1
(After this, the "sleep" on host1 should be killed within 30 seconds.)
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
http://rhn.redhat.com/errata/RHBA-2013-1632.html