Ubuntu
linux-ec2 package

ec2 instance fails to boot if registered without ramdisk

Bug #510130 reported by Scott Moser
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux-ec2 (Ubuntu)
Fix Released
High
John Johansen
Ubuntu lucid-alpha-3
Lucid
Fix Released
High
John Johansen
Ubuntu lucid-alpha-3
mountall (Ubuntu)
Fix Released
Medium
Unassigned
Lucid
Fix Released
Medium
Unassigned

Bug Description

Binary package hint: upstart

bug 503212 was fixed, so I re-enabled ramdiskless images in ec2 for

ami-7d799414 ubuntu-images-testing-us/ubuntu-lucid-daily-i386-server-20100120.1.manifest.xml

Attempts to boot the instance fail.

Some hints in the console might be:
mountall: Event failed
mountall: Event failed

I'll have to debug this further, but wanted to open a bug to track it.

ProblemType: Bug
Architecture: i386
Date: Wed Jan 20 14:34:24 2010
DistroRelease: Ubuntu 10.04
Ec2AMI: ami-1b7d9072
Ec2AMIManifest: ubuntu-images-testing-us/ubuntu-lucid-daily-i386-server-20100120.manifest.xml
Ec2AvailabilityZone: us-east-1d
Ec2InstanceType: m1.small
Ec2Kernel: aki-60cb2609
Ec2Ramdisk: ari-537d903a
Package: upstart 0.6.3-11build1
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: User Name 2.6.32-301.4-ec2
SourcePackage: upstart
Tags: lucid ec2-images
Uname: Linux 2.6.32-301-ec2 i686

Related branches

lp:ubuntu/lucid/linux-ec2
Revision history for this message
Scott Moser (smoser) wrote :
Revision history for this message
Scott Moser (smoser) wrote :

heres a bootlog with a debug initramfs. The debug initramfs attempted to make the world look like there was no initramfs before invoking /sbin/init. It did the following:

a. instead of moving /proc and /sys to /rootmnt, it unmounted them
b. invoked init with '--verbose'
c. rewrote the mountall job so it said '--debug'
d. umount ${rootmnt}/dev

'd' seems to be problematic.

I noticed that the uec kernels have '/dev/ mounted as a tmpfs by the kernel even without ramdisk, and ec2 kernel does not.
The UEC (-virtual) kernels also have a message like:
  devtmpfs: initialized

which is not present in this boot log.

Revision history for this message
Scott Moser (smoser) wrote :

I'm not certain its related just yet, but ec2 kernel does not not have devtmpfs enabled:

$ grep CONFIG_DEVTMPFS /boot/config-2.6.32-301-ec2
# CONFIG_DEVTMPFS is not set

Revision history for this message
Scott Moser (smoser) wrote :

moving this to linux-ec2 package, and assigning to jjohansen as it seems it might be related to CONFIG_DEVTMPFS

affects: upstart (Ubuntu) → linux-ec2 (Ubuntu)
Changed in linux-ec2 (Ubuntu):
assignee: nobody → John Johansen (jjohansen)
importance: Undecided → High
Revision history for this message
Scott Moser (smoser) wrote :

Opening this also against mountall to try to get an answer to the following question:
Is an upstart and/or mountall dependency on CONFIG_DEVTMPFS a bug? or is that simply a requirement for lucid kernels?

Revision history for this message
Scott Moser (smoser) wrote :

see bug 509841 comment 19 for another report that indeed DEVTMPFS is required.

Thierry Carrez (ttx)
Changed in linux-ec2 (Ubuntu Lucid):
milestone: none → lucid-alpha-3
status: New → Confirmed
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package linux-ec2 - 2.6.32-302.6

---------------
linux-ec2 (2.6.32-302.6) lucid; urgency=low

  [ John Johansen ]

  * rebase to Ubuntu-2.6.32-11.15
  * import raw xen patchset
  * import series file for the xen patchset
  * rebase to Ubuntu-2.6.32-12.16
  * [Config] update ec2 configs to make them closer to -server flavor
    - LP: #510130
 -- Andy Whitcroft <email address hidden> Sat, 06 Feb 2010 18:04:10 +0000

Changed in linux-ec2 (Ubuntu Lucid):
status: Confirmed → Fix Released
Revision history for this message
Scott Moser (smoser) wrote :

Verified that ec2 images boot now without ramdisk. Builds ubuntu-lucid-daily-i386-server-20100210.manifest.xml and later should have no ramdisk associated with them. Woohoo!

I booted and ssh'ed to this instance:
RESERVATION r-3a0c7952 950047163771 default
INSTANCE i-ef3adf84 ami-1fdb3776 terminated ec2-keypair.us-east-1 0 m1.small 2010-02-10T05:22:31+0000us-east-1c aki-3fdb3756 monitoring-disabled instance-store

Revision history for this message
Scott Moser (smoser) wrote :

The mountall changes necessary to boot without CONFIG_DEVTMPFS were commited and released under bug 513919

Changed in mountall (Ubuntu Lucid):
importance: Undecided → Medium
status: New → Fix Released
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