Bug 39418 – Configure docker.io to use overlayFS

Bug 39418 - Configure docker.io to use overlayFS


Summary:	Configure docker.io to use overlayFS

Status:	CLOSED FIXED

Product:	UCS
Classification:	Unclassified
Component:	Docker
Version:	UCS 4.1
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	UCS 4.1
Assigned To:	Arvid Requate
QA Contact:	Stefan Gohmann

URL:
Keywords:	interim-1

Depends on:	39350
Blocks:	39496
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Reported:	2015-09-28 11:48 CEST by Arvid Requate
Modified:	2015-11-17 12:12 CET (History)
CC List:	1 user (show)

See Also:	39432
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Description Arvid Requate

2015-09-28 11:48:25 CEST

Currently docker.io 1.6 uses devicemapper as storage driver:

root@master50:~# docker info
Containers: 1
Images: 4
Storage Driver: devicemapper

We should set '-s overlay' in the DOCKER_OPTS in /etc/default/docker

Comment 1 Arvid Requate

2015-09-28 12:10:38 CEST

Maybe we don't want this currently:

* Looks like coreOS users found that they run out of inodes with the default bytes-per-inode ratio of 16k/inode, see https://github.com/coreos/bugs/issues/264 . This may cause issues with upgraded UCS systems.

* See also https://github.com/docker/docker/pull/12354

Comment 2 Arvid Requate

2015-09-28 12:56:47 CEST

About overlayFS see also:

https://docs.docker.com/reference/commandline/daemon/#daemon-storage-driver-option




But there are issues with dockers default devicemapper setup in loopback mode:

* http://www.projectatomic.io/blog/2015/06/notes-on-fedora-centos-and-docker-storage-drivers/

* https://github.com/docker/docker/blob/master/daemon/graphdriver/devmapper/README.md

Comment 3 Arvid Requate

2015-10-01 19:33:34 CEST

The new metapackage univention-docker now sets --storage-driver=overlay in /etc/default/docker.

Changelog adjusted.

Comment 4 Stefan Gohmann

2015-10-02 07:38:53 CEST

Changelog: OK

Installation: OK

Upgrade: OK ( you have to reboot)

Comment 5 Stefan Gohmann

2015-11-17 12:12:23 CET

UCS 4.1 has been released:
 https://docs.software-univention.de/release-notes-4.1-0-en.html
 https://docs.software-univention.de/release-notes-4.1-0-de.html

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