Description of problem: Regarding bug #1440230 and the temporary fix (https://github.com/oVirt/vdsm/tree/master/vdsm_hooks/diskunmap) for the time being, there is a problem with oVirt Node NG releases. They lack this vdsm hook. So a node with Cinder/Ceph combo is unable to unmap freed space and will eventually suffocate in no space left on the core Ceph storage. Version-Release number of selected component (if applicable): How reproducible: In a Ceph backed VM delete a file and fstrim the filesystem. Steps to Reproduce: 1. within the VM: dd if=/dev/zero bs=1M of=/bug_testfile count=1024 2. note size increase of the image in Ceph 3. within VM: rm /bug_testfile && fstrim / 4. note size decrease of the image in Ceph Actual results: The size will not decrease. Expected results: The size should decrease. Additional info:
*** Bug 1638318 has been marked as a duplicate of this bug. ***
Discussing the request to add the hook to oVirt Node NG here: https://lists.ovirt.org/archives/list/devel@ovirt.org/thread/Z6GZTUBGUECMJUU7ILFFUSRDGWDQ3OUR/
Closing won't fix being VDSM diskunmap hook considered a security issue. Please note that you can still install it manually on oVirt Node with yum install: it will be persisted upon upgrades. # yum install https://resources.ovirt.org/pub/ovirt-4.2/rpm/el7/noarch/vdsm-hook-diskunmap-4.20.39.1-1.el7.noarch.rpm