Bug 1096849

Summary:	docker daemon for epel7 doesn't allow for additional options
Product:	[Fedora] Fedora EPEL	Reporter:	Jim Perrin <jperrin>
Component:	docker-io	Assignee:	Lokesh Mandvekar <lsm5>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	epel7	CC:	admiller, bproffit, dwalsh, golang-updates, jkeck, jzb, lsm5, madko, mattdm, mgoldman, puiterwijk, s, vbatts
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-06-11 13:22:41 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:

Description Jim Perrin 2014-05-12 14:16:27 UTC

Description of problem:
For el6, epel's docker build creates /etc/sysconfig/docker, which allows other options to be passed to the docker daemon. the systemd unit files for epel7's docker build do not. 

Version-Release number of selected component (if applicable):
docker-io-0.10.0-2.el7.x86_64

How reproducible:
Always

Steps to Reproduce:
1. yum install docker-io
2. less /usr/lib/systemd/system/docker.service

Actual results:
There is no $other_args defined in the systemd unit file, nor is there an /etc/sysconfig/docker in which to define the options. 

Expected results:
Same as the el6 docker. You should be able to pass additional arguments for bridging, dns, or restart options 

Additional info:

Comment 1 Jim Perrin 2014-05-12 15:09:41 UTC

After poking around systemd a bit more, it appears that this can be done systemd internals by creating /etc/systemd/system/docker.service.d/bridge.conf or similar with the options I need. This option doesn't appear to be documented well, but it seems to work fine and be the 'proper' way.

Comment 2 Daniel Walsh 2014-05-22 16:21:49 UTC

Jim can you document this?  So we can add it to the docker package?   Should we add a  /etc/systemd/system/docker.service.d/ to the docker package?

Comment 3 Jim Perrin 2014-05-23 19:52:51 UTC

I'll try to document something sane for this. 

I'm not certain that adding the directory to the package is 'proper', as no other packages appear to provide similar directories. It's possible it should simply go into /usr/share/doc/docker-io-*/ as an options example file.

Comment 4 Daniel Walsh 2014-05-24 09:23:47 UTC

OK that sounds good.  BTW In rhel7 the package will be called docker not docker-io.  Which I wish we would fix in Fedora and RHEL6/Centos6.

Comment 5 Edouard Bourguignon 2014-06-11 09:54:33 UTC

I can't find any docker package on rhel7. docker-io is there (version 1.0.0-1.el7) but /etc/sysconfig/docker seems to be an HTML page...
I'll check the docs in /usr/share/doc/docker-io*

And I can't use any more (it seems) the HTTP_PROXY env variable. docker tries to resolv docker.io...

Comment 7 Daniel Walsh 2014-06-11 12:27:59 UTC

You need to enable the extras repo.

I think you do this via  

# subscription-manager repos --enable=rhel-x86_64-server-extras-7
# subscription-manager repos --enable=rhel-x86_64-server-optional-7

Comment 13 Daniel Walsh 2014-06-11 13:22:41 UTC

This package is being removed from EPEL since there is now a supported version of docker in the released rhel7 repositories.