Bug 1315452
| Summary: | Make thin_ls available in rhel 7.3 | |||
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| Product: | Red Hat Enterprise Linux 7 | Reporter: | Vivek Goyal <vgoyal> | |
| Component: | device-mapper-persistent-data | Assignee: | Peter Rajnoha <prajnoha> | |
| Status: | CLOSED ERRATA | QA Contact: | Bruno Goncalves <bgoncalv> | |
| Severity: | medium | Docs Contact: | Milan Navratil <mnavrati> | |
| Priority: | high | |||
| Version: | 7.3 | CC: | agk, agoldste, bgoncalv, heinzm, jbrassow, lfriedma, lvm-team, msnitzer, mthacker, sdodson, sjenning, thornber | |
| Target Milestone: | rc | Keywords: | ZStream | |
| Target Release: | --- | |||
| Hardware: | All | |||
| OS: | Linux | |||
| Whiteboard: | ||||
| Fixed In Version: | device-mapper-persistent-data-0.6.2-0.1.rc6.el7 | Doc Type: | Release Note | |
| Doc Text: |
_device-mapper-persistent-data_ rebased to version 0.6.2
The _device-mapper-persistent-data_ packages have been upgraded to upstream version 0.6.2, which provides a number of bug fixes and enhancements over the previous version. Notably, the *thin_ls* tool, which can provide information about thin volumes in a pool, is now available.
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Story Points: | --- | |
| Clone Of: | ||||
| : | 1315460 1355797 1356884 (view as bug list) | Environment: | ||
| Last Closed: | 2016-11-04 00:30:26 UTC | Type: | Bug | |
| Regression: | --- | Mount Type: | --- | |
| Documentation: | --- | CRM: | ||
| Verified Versions: | Category: | --- | ||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | ||
| Cloudforms Team: | --- | Target Upstream Version: | ||
| Embargoed: | ||||
| Bug Depends On: | ||||
| Bug Blocks: | 1355797, 1356884 | |||
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Description
Vivek Goyal
2016-03-07 19:19:22 UTC
Here is upstream discussion looking for thin_ls. https://github.com/google/cadvisor/issues/959#issuecomment-191326562 This is needed for both Kubernetes and OpenShift. thin_ls gives us the ability to determine the amount of storage that a container has used in its COW layer. Currently thin_ls does not operate on live metadata $ ./thin_ls -o DEV,EXCLUSIVE /dev/mapper/fedora-docker--pool_tmeta syscall 'open' failed: Device or resource busy Note: you cannot run this tool with these options on live metadata. This a problem for the cadvisor use case. Strangely, it seems to work when docker is using the loop thin dm rather than a real device. Still looking into this. In order for thin_ls to work on a live thin device a snapshot must be taken dmsetup message /dev/mapper/fedora-docker--pool 0 "reserve_metadata_snap" Then thin_ls will work. After thin_ls is run, the snapshot needs to be released dmsetup message /dev/mapper/fedora-docker--pool 0 "release_metadata_snap" # rpm -q device-mapper-persistent-data device-mapper-persistent-data-0.6.2-0.1.rc8.el7.x86_64 # rpm -ql device-mapper-persistent-data | grep thin_ls /usr/sbin/thin_ls /usr/share/man/man8/thin_ls.8.gz # lvcreate -L 200M -T vgtest/mythinpool -V1G -n thin1 # lvcreate -T vgtest/mythinpool -V1G -n thin2 # dmsetup message /dev/mapper/vgtest-mythinpool-tpool 0 reserve_metadata_snap # thin_ls --metadata-snap /dev/mapper/vgtest-mythinpool_tmeta DEV MAPPED CREATE_TIME SNAP_TIME 1 0 0 0 2 0 0 0 # dmsetup message /dev/mapper/vgtest-mythinpool-tpool 0 release_metadata_snap *** Bug 1355797 has been marked as a duplicate of this bug. *** 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. https://rhn.redhat.com/errata/RHBA-2016-2211.html |