Bug 734794

Summary:	RHEL6.1 i386 ami does not have swap partitions
Product:	Red Hat Enterprise Linux 6	Reporter:	wes hayutin <whayutin>
Component:	releng	Assignee:	Jay Greguske <jgreguske>
Status:	CLOSED DUPLICATE	QA Contact:	wes hayutin <whayutin>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	6.2	CC:	dmach, drjones, pbonzini
Target Milestone:	rc	Keywords:	EC2
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-12-13 15:36:50 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:
Bug Blocks:	756082

Description wes hayutin 2011-08-31 13:41:57 UTC

Description of problem:

[root@ip-10-242-203-226 ~]# wget -q -O - http://169.254.169.254/latest/dynamic/instance-identity/document
{
  "version" : "2010-08-31",
  "kernelId" : "aki-36ed075f",
  "ramdiskId" : null,
  "instanceId" : "i-c833d4a8",
  "instanceType" : "m1.small",
  "architecture" : "i386",
  "billingProducts" : [ "bp-6fa54006" ],
  "availabilityZone" : "us-east-1b",
  "accountId" : "673500695950",
  "pendingTime" : "2011-08-31T12:05:36Z",
  "devpayProductCodes" : null,
  "imageId" : "ami-0cbb4265",
  "privateIp" : "10.242.203.226",
  "region" : "us-east-1"
}[root@ip-10-242-203-226 ~]# cat /etc/fstab 
LABEL=_/   /         ext4    defaults        1 1
/dev/xvda2 /mnt      ext3    defaults,context=system_u:object_r:usr_t:s0  0 0
/dev/xvda3 swap      swap    defaults        0 0
none       /proc     proc    defaults        0 0
none       /sys      sysfs   defaults        0 0
none       /dev/pts  devpts  gid=5,mode=620  0 0
none       /dev/shm  tmpfs   defaults        0 0
[root@ip-10-242-203-226 ~]# swapon -a
swapon: /dev/xvda3: stat failed: No such file or directory
[root@ip-10-242-203-226 ~]# 



I will try to get info on the other hwp for i386, however I'm assuming small and medium have the same issue

Comment 2 Jay Greguske 2011-08-31 14:14:18 UTC

It'd be helpful to see if this a problem on RHEL 5.

RHEL 6 has a bug where xen devices start from 'e' rather than 'a'.

https://bugzilla.redhat.com/show_bug.cgi?id=729586

So /dev/xvda3 is actually being exposed as /dev/xvde3. In my trial if you change that swap fstab entry to match this behavior, swapon -a works.

RHEL 5 doesn't have this bug, so it should just work.

Comment 3 Jay Greguske 2011-08-31 14:15:48 UTC

Additionally when filing an ec2-related bug, please be sure to use the EC2 keyword.

Comment 4 Andrew Jones 2011-10-05 14:49:12 UTC

Why do AMI fstab files use devices instead of labels or uuids? I think a bug to the instance generator should be written to correct that. These types of assumptions about device naming are dangerous and unnecessary.

Comment 5 Paolo Bonzini 2011-10-06 11:20:31 UTC

In addition, /dev/xvda is _not_ being exposed as /dev/xvde, /dev/sda is.

The problem really is that we are using /dev/sda.  Is that mandated by Amazon's infrastructure or can we control this?

Comment 6 Jay Greguske 2011-10-06 13:00:46 UTC

/dev/sda is what Amazon's docs recommend. Other Linux distributions as far as I know use this convention.

http://docs.amazonwebservices.com/AWSEC2/latest/UserGuide/InstanceStorage.html

Comment 11 Jay Greguske 2011-12-13 15:36:50 UTC

Closing as a dupe since this is really a symptom of bug 729586.

*** This bug has been marked as a duplicate of bug 729586 ***