Bug 1267320

Summary:	Cloud-init (re)start Docker Daemon
Product:	Red Hat Enterprise Linux 7	Reporter:	Eric Jones <erjones>
Component:	cloud-init	Assignee:	Lars Kellogg-Stedman <lars>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.1
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-09-30 13:32:25 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 Eric Jones 2015-09-29 15:49:24 UTC

Description of problem:
cloud-init cannot restart docker daemon, it freezes and will fail to finish.

Version-Release number of selected component (if applicable):
RHEL 7.1
cloud-init 0.7.6

How reproducible:
Every time I run cloud-init script with - systemctl restart docker 
or without the re, it will freeze

Steps to Reproduce:
1. Spin up vm with image of rhel 7.1 with flavor m3.large on https://control.os1.phx2.redhat.com/dashboard and add a basic cloud init script, including - systemctl start docker under runcmd
2. log into the instance and run 'tail -f /var/log/cloud-init.log'

Actual results:
cloud-init freezes and fails to complete

Expected results:
restart/start the docker daemon

Additional info:
there is a github logged issue that is very similar: https://github.com/projectatomic/docker-storage-setup/issues/77

Wanted to make sure this was a highlighted issue as Openshift, as well as containers, are running into this issue.

Comment 2 Lars Kellogg-Stedman 2015-09-29 17:45:36 UTC

Try running:

    systemctl --no-block restart docker

The problem is that docker can't start until cloud-init has finished running, so you've got yourself deadlocked.

Comment 3 Eric Jones 2015-09-29 18:33:31 UTC

That worked. Thank you. Is there any documentation on that?

Comment 4 Lars Kellogg-Stedman 2015-09-30 13:32:25 UTC

> Is there any documentation on that?

Well, there's the systemd documentation, describes the --no-block option:

  http://www.freedesktop.org/software/systemd/man/systemctl.html

It looks like there is a blog post out there on this particular issue:

  http://dustymabe.com/2015/08/03/installingstarting-systemd-services-using-cloud-init/

Comment 5 Eric Jones 2015-09-30 14:34:00 UTC

Okay,

I appreciate it.