cloud-init fails to install if /tmp directory is noexec

[Tim Potter]

Some output from "apt-get install cloud-init":

Can't exec "/tmp/cloud-init.config.96251": Permission denied at /usr/share/perl/5.10/IPC/Open3.pm line 168.
open2: exec of /tmp/cloud-init.config.96251 configure failed at /usr/share/perl5/Debconf/ConfModule.pm line 59
cloud-init failed to preconfigure, with exit status 255

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: cloud-init 0.6.1-0ubuntu8
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
NonfreeKernelModules: wl
Architecture: amd64
Date: Thu Sep 15 13:29:02 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta 1 amd64 (20110329.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: cloud-init
UpgradeStatus: No upgrade log present (probably fresh install)