Comment 0 for bug 1728186

The AliYun datasource is 'AlyYun', but

# cat /etc/cloud/cloud.cfg.d/90_dpkg.cfg
# to update this file, run dpkg-reconfigure cloud-init
datasource_list: [ NoCloud, ConfigDrive, OpenNebula, DigitalOcean, Azure, AltCloud, OVF, MAAS, GCE, OpenStack, CloudSigma, SmartOS, Bigstep, Scaleway, Aliyun, Ec2, CloudStack, None ]

The capitalizaiton there is wrong, and it causes a warning in
 /run/cloud-init/ds-identify.log

WARN: No check method 'dscheck_Aliyun' for datasource 'Aliyun'

And loading of the datasource would also fail.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: cloud-init 0.7.9-233-ge586fe35-0ubuntu1~16.04.2
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
Date: Sat Oct 28 02:19:27 2017
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=C.UTF-8
SourcePackage: cloud-init
UpgradeStatus: No upgrade log present (probably fresh install)