Description of problem:

resizefs cloud-init module (see /usr/lib/python2.6/site-packages/cloudinit/CloudConfig/cc_resizefs.py) always uses resize2fs (hardcoded) while trying to resize the root filesystem. If the root filesystem is EXT4, the following backtrace is printed while booting:

loud-init start running: Mon, 10 Sep 2012 19:33:32 +0000. up 9.09 seconds
found data source: DataSourceEc2
2012-09-10 15:33:32,869 - cc_resizefs.py[WARNING]: Failed to resize filesystem (['resize2fs', '/tmp/tmpAaw0hz'])
2012-09-10 15:33:32,871 - cc_resizefs.py[WARNING]: output=Couldn't find valid filesystem superblock.

error=resize2fs 1.39 (29-May-2006)
resize2fs: Filesystem has unsupported feature(s) while trying to open /tmp/tmpAaw0hz

2012-09-10 15:33:32,894 - __init__.py[WARNING]: Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/cloudinit/CloudConfig/__init__.py", line 118, in run_cc_modules
    cc.handle(name, run_args, freq=freq)
  File "/usr/lib/python2.6/site-packages/cloudinit/CloudConfig/__init__.py", line 79, in handle
    [name, self.cfg, self.cloud, cloudinit.log, args])
  File "/usr/lib/python2.6/site-packages/cloudinit/__init__.py", line 324, in sem_and_run
    func(*args)
  File "/usr/lib/python2.6/site-packages/cloudinit/CloudConfig/cc_resizefs.py", line 81, in handle
    util.subp(resize_cmd)
  File "/usr/lib/python2.6/site-packages/cloudinit/util.py", line 232, in subp
    raise _exc
CalledProcessError: Command '['resize2fs', '/tmp/tmpAaw0hz']' returned non-zero exit status 1

2012-09-10 15:33:32,903 - __init__.py[ERROR]: config handling of resizefs, None, [] failed

---

[root@test ~]# resize2fs /dev/root
resize2fs 1.39 (29-May-2006)
resize2fs: Filesystem has unsupported feature(s) while trying to open /dev/root
Couldn't find valid filesystem superblock.

[root@test ~]# resize4fs /dev/root
resize4fs 1.41.12 (17-May-2010)
The filesystem is already 26214400 blocks long.  Nothing to do!

---

My guess is that resizefs module should use resize4fs from e4fsprogs in RHEL5 derived distributions.


Version-Release number of selected component (if applicable):

Name        : cloud-init                   Relocations: (not relocatable)
Version     : 0.6.3                             Vendor: Fedora Project
Release     : 0.9.bzr532.el5                Build Date: Fri 20 Jul 2012 02:32:40 PM EDT
Install Date: Mon 10 Sep 2012 10:57:52 AM EDT      Build Host: buildvm-04.phx2.fedoraproject.org
Group       : System Environment/Base       Source RPM: cloud-init-0.6.3-0.9.bzr532.el5.src.rpm
Size        : 645899                           License: GPLv3
Signature   : DSA/SHA1, Fri 20 Jul 2012 07:01:21 PM EDT, Key ID 119cc036217521f6
Packager    : Fedora Project
URL         : http://launchpad.net/cloud-init
Summary     : Cloud instance init scripts
Description :
Cloud-init is a set of init scripts for cloud instances.  Cloud instances
need special scripts to run during initialization to retrieve and install
ssh keys and to let the user run various scripts.