Comment 3 for bug 1843584

Note that cloud-init uses the 'variant' value to determine the distro:

tumble1:~ # python3 -c 'import pprint; from cloudinit import util; pprint.pprint(util.system_info())'
{'dist': ('opensuse-tumbleweed', '20190909', 'x86_64'),
 'platform': 'Linux-4.15.0-58-generic-x86_64-with-glibc2.2.5',
 'python': '3.7.3',
 'release': '4.15.0-58-generic',
 'system': 'Linux',
 'uname': uname_result(system='Linux', node='tumble1', release='4.15.0-58-generic', version='#64~16.04.1-Ubuntu SMP Wed Aug 7 14:10:35 UTC 2019', machine='x86_64', processor='x86_64'),
 'variant': 'suse'}

So, opensuse and friends are reported to cloud-init as 'suse' which is in the list for rendering.

Let's see what's actually wrong in your instance after posting the cloud-init logs.