Procedure is laid out here. Results are at the bottom. Procedure is using Lunar. Procedure for other series is the same except replace Lunar with [jammy,focal].

Get dependencies:
```
sudo apt install genisoimage
sudo apt install qemu-utils
```

Generate initial seed iso for login:
```
cat << EOF > user-data
#cloud-config
password: password
chpasswd:
  expire: False

EOF

cat << EOF > meta-data
instance-id: myid
local-hostname: originalhostname

EOF

touch vendor-data
genisoimage -output seed.iso -volid cidata -joliet -rock user-data meta-data vendor-data
```

In the same directory as the seed.iso (containing user-data and meta-data files),
run "sudo python3 -m http.server 80"

Obtain latest cloud image: https://cloud-images.ubuntu.com/lunar/current/lunar-server-cloudimg-amd64.img

Retrieve kernel from image:
```
qemu-img create -f qcow2 -b lunar-server-cloudimg-amd64.img -F qcow2 lunar.qcow2
sudo modprobe nbd max_part=16
sudo qemu-nbd -c /dev/nbd0 lunar.qcow2
sudo mount /dev/nbd0p1 /mnt/
sudo cp /mnt/boot/vmlinuz-<version> .  # Version varies by image
sudo chown james:james vmlinuz-*  # replace 'james' with your user
sudo umount /mnt
sudo qemu-nbd -d /dev/nbd0
```

Launch VM to enable login via username/password:
```
qemu-system-x86_64 \
-enable-kvm \
-cpu host \
-smp 2 \
-m 4000 \
-net nic \
-net user,hostfwd=tcp::8022-:22 \
-hda lunar.qcow2 \
-drive driver=raw,file=seed.iso,if=virtio
```
Login with user "ubuntu" and password "password"
Execute "cloud-init clean --logs"
Power off VM
Start VM with kernel command line params:
```
qemu-system-x86_64 \
-enable-kvm \
-cpu host \
-smp 2 \
-m 4000 \
-net nic \
-net user,hostfwd=tcp::8022-:22 \
-hda lunar.qcow2 \
-kernel vmlinuz-<version> \
-append "root=/dev/sda1 ds=nocloud-net;s=http://10.0.2.2/;h=newhost"
```

Login with user "ubuntu" password "password"
Inspecting /var/log/cloud-init.log should reveal failure and a ModuleNotFoundError

Inspect "/var/log/cloud-init.log" for "WARN". Notice:
```
2023-08-04 03:54:07,665 - util.py[WARNING]: failed stage init-local
2023-08-04 03:54:07,665 - util.py[DEBUG]: failed stage init-local
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 766, in status_wrapper
    ret = functor(name, args)
  File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 384, in main_init
    init.fetch(existing=existing)
  File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 436, in fetch
    return self._get_data_source(existing=existing)
  File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 327, in _get_data_source
    (ds, dsname) = sources.find_source(
  File "/usr/lib/python3/dist-packages/cloudinit/sources/__init__.py", line 996, in find_source
    ds_list = list_sources(cfg_list, ds_deps, pkg_list)
  File "/usr/lib/python3/dist-packages/cloudinit/sources/__init__.py", line 1043, in list_sources
    m_locs, _looked_locs = importer.find_module(
  File "/usr/lib/python3/dist-packages/cloudinit/importer.py", line 70, in find_module
    if not importlib.util.find_spec(full_path):
  File "/usr/lib/python3.10/importlib/util.py", line 94, in find_spec
    parent = __import__(parent_name, fromlist=['__path__'])
ModuleNotFoundError: No module named 'DataSourcenocloud-net;s=http://10'
```

Install cloud-init from proposed:
```
echo deb "http://archive.ubuntu.com/ubuntu $(lsb_release -sc)-proposed main" >> /etc/apt/sources.list.d/proposed.list
apt update -q &> /dev/null
apt install -qy cloud-init -t=$(lsb_release -sc)-proposed &>/dev/null
cloud-init --version
```

Execute "cloud-init clean --logs"
Power off VM
Start VM as before:
```
qemu-system-x86_64 \
-enable-kvm \
-cpu host \
-smp 2 \
-m 4000 \
-net nic \
-net user,hostfwd=tcp::8022-:22 \
-hda lunar.qcow2 \
-kernel vmlinuz-<version> \
-append "root=/dev/sda1 ds=nocloud-net;s=http://10.0.2.2/;h=newhost"
```

Login with user "ubuntu" password "password"
Verify NoCloud datasource correctly detected, user data correctly fetched, and hostname correctly set


###############################
### LUNAR RESULTS #############
###############################
Error seen in logs:
2023-08-04 16:41:32,116 - util.py[DEBUG]: failed stage init-local
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 766, in status_wrapper
    ret = functor(name, args)
          ^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 384, in main_init
    init.fetch(existing=existing)
  File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 436, in fetch
    return self._get_data_source(existing=existing)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 327, in _get_data_source
    (ds, dsname) = sources.find_source(
                   ^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/cloudinit/sources/__init__.py", line 996, in find_source
    ds_list = list_sources(cfg_list, ds_deps, pkg_list)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/cloudinit/sources/__init__.py", line 1043, in list_sources
    m_locs, _looked_locs = importer.find_module(
                           ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/cloudinit/importer.py", line 70, in find_module
    if not importlib.util.find_spec(full_path):
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib.util>", line 94, in find_spec
ModuleNotFoundError: No module named 'DataSourcenocloud-net;s=http://10'


Version after proposed upgrade: /usr/bin/cloud-init 23.2.2-0ubuntu0~23.04.1

hostname after upgrade:
ubuntu@newhost:~$ hostname
newhost
ubuntu@newhost:~$

/var/log/cloud-init.log snippets of reboot after upgrade:
2023-08-04 18:42:47,532 - __init__.py[DEBUG]: Searching for network data source in: ['DataSourceNoCloudNet', 'DataSourceNone']
2023-08-04 18:42:47,532 - handlers.py[DEBUG]: start: init-network/search-NoCloudNet: searching for network data from DataSourceNoCloudNet
2023-08-04 18:42:47,532 - __init__.py[DEBUG]: Seeing if we can get any data from <class 'cloudinit.sources.DataSourceNoCloud.DataSourceNoCloudNet'>
2023-08-04 18:42:47,532 - __init__.py[DEBUG]: Update datasource metadata and network config due to events: boot-new-instance
2023-08-04 18:42:47,533 - __init__.py[DEBUG]: Detected platform: DataSourceNoCloudNet [seed=None][dsmode=net]. Checking for active instance data

2023-08-04 18:42:48,149 - url_helper.py[DEBUG]: [0/11] open 'http://10.0.2.2/meta-data' with {'url': 'http://10.0.2.2/meta-data', 'stream': False, 'allow_redirects': True, 'method': 'GET', 'headers': {'User-Agent': 'Cloud-Init/23.2.2-0ubuntu0~23.04.1'}} configuration
2023-08-04 18:42:48,165 - url_helper.py[DEBUG]: Read from http://10.0.2.2/meta-data (200, 52b) after 1 attempts
2023-08-04 18:42:48,165 - util.py[DEBUG]: Attempting to load yaml from string of length 52 with allowed root types (<class 'dict'>,)
2023-08-04 18:42:48,166 - url_helper.py[DEBUG]: [0/11] open 'http://10.0.2.2/user-data' with {'url': 'http://10.0.2.2/user-data', 'stream': False, 'allow_redirects': True, 'method': 'GET', 'headers': {'User-Agent': 'Cloud-Init/23.2.2-0ubuntu0~23.04.1'}} configuration
2023-08-04 18:42:48,171 - url_helper.py[DEBUG]: Read from http://10.0.2.2/user-data (200, 60b) after 1 attempts
2023-08-04 18:42:48,171 - url_helper.py[DEBUG]: [0/11] open 'http://10.0.2.2/vendor-data' with {'url': 'http://10.0.2.2/vendor-data', 'stream': False, 'allow_redirects': True, 'method': 'GET', 'headers': {'User-Agent': 'Cloud-Init/23.2.2-0ubuntu0~23.04.1'}} configuration
2023-08-04 18:42:48,173 - url_helper.py[DEBUG]: Read from http://10.0.2.2/vendor-data (200, 0b) after 1 attempts
2023-08-04 18:42:48,174 - DataSourceNoCloud.py[DEBUG]: Using seeded cache data from http://10.0.2.2/


###############################
### JAMMY RESULTS #############
###############################
Error seen in logs:
2023-08-04 18:57:53,092 - util.py[WARNING]: failed stage init-local
2023-08-04 18:57:53,092 - util.py[DEBUG]: failed stage init-local
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 766, in status_wrapper
    ret = functor(name, args)
  File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 384, in main_init
    init.fetch(existing=existing)
  File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 436, in fetch
    return self._get_data_source(existing=existing)
  File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 327, in _get_data_source
    (ds, dsname) = sources.find_source(
  File "/usr/lib/python3/dist-packages/cloudinit/sources/__init__.py", line 996, in find_source
    ds_list = list_sources(cfg_list, ds_deps, pkg_list)
  File "/usr/lib/python3/dist-packages/cloudinit/sources/__init__.py", line 1043, in list_sources
    m_locs, _looked_locs = importer.find_module(
  File "/usr/lib/python3/dist-packages/cloudinit/importer.py", line 70, in find_module
    if not importlib.util.find_spec(full_path):
  File "/usr/lib/python3.10/importlib/util.py", line 94, in find_spec
    parent = __import__(parent_name, fromlist=['__path__'])
ModuleNotFoundError: No module named 'DataSourcenocloud-net;s=http://10'


Version after proposed upgrade: /usr/bin/cloud-init 23.2.2-0ubuntu0~22.04.1

hostname after upgrade:
ubuntu@newhost:~$ hostname
newhost

/var/log/cloud-init.log snippets of reboot after upgrade:
2023-08-04 19:02:35,323 - __init__.py[DEBUG]: Searching for network data source in: ['DataSourceNoCloudNet', 'Data
SourceNone']
2023-08-04 19:02:35,323 - handlers.py[DEBUG]: start: init-network/search-NoCloudNet: searching for network data fr
om DataSourceNoCloudNet
2023-08-04 19:02:35,323 - __init__.py[DEBUG]: Seeing if we can get any data from <class 'cloudinit.sources.DataSou
rceNoCloud.DataSourceNoCloudNet'>
2023-08-04 19:02:35,323 - __init__.py[DEBUG]: Update datasource metadata and network config due to events: boot-ne
w-instance
2023-08-04 19:02:35,324 - __init__.py[DEBUG]: Detected platform: DataSourceNoCloudNet [seed=None][dsmode=net]. Che
cking for active instance data

2023-08-04 19:02:35,755 - url_helper.py[DEBUG]: [0/11] open 'http://10.0.2.2/meta-data' with {'url': 'http://10.0.
2.2/meta-data', 'stream': False, 'allow_redirects': True, 'method': 'GET', 'headers': {'User-Agent': 'Cloud-Init/2
3.2.2-0ubuntu0~22.04.1'}} configuration
2023-08-04 19:02:35,768 - url_helper.py[DEBUG]: Read from http://10.0.2.2/meta-data (200, 52b) after 1 attempts
2023-08-04 19:02:35,768 - util.py[DEBUG]: Attempting to load yaml from string of length 52 with allowed root types
 (<class 'dict'>,)
2023-08-04 19:02:35,769 - url_helper.py[DEBUG]: [0/11] open 'http://10.0.2.2/user-data' with {'url': 'http://10.0.
2.2/user-data', 'stream': False, 'allow_redirects': True, 'method': 'GET', 'headers': {'User-Agent': 'Cloud-Init/2
3.2.2-0ubuntu0~22.04.1'}} configuration
2023-08-04 19:02:35,773 - url_helper.py[DEBUG]: Read from http://10.0.2.2/user-data (200, 60b) after 1 attempts
2023-08-04 19:02:35,773 - url_helper.py[DEBUG]: [0/11] open 'http://10.0.2.2/vendor-data' with {'url': 'http://10.
0.2.2/vendor-data', 'stream': False, 'allow_redirects': True, 'method': 'GET', 'headers': {'User-Agent': 'Cloud-In
it/23.2.2-0ubuntu0~22.04.1'}} configuration
2023-08-04 19:02:35,776 - url_helper.py[DEBUG]: Read from http://10.0.2.2/vendor-data (200, 0b) after 1 attempts
2023-08-04 19:02:35,776 - DataSourceNoCloud.py[DEBUG]: Using seeded cache data from http://10.0.2.2/


###############################
### FOCAL RESULTS #############
###############################
Error seen in logs:
2023-08-04 19:09:07,256 - util.py[WARNING]: failed stage init-local
2023-08-04 19:09:07,256 - util.py[DEBUG]: failed stage init-local
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 766, in status_wrapper
    ret = functor(name, args)
  File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 384, in main_init
    init.fetch(existing=existing)
  File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 436, in fetch
    return self._get_data_source(existing=existing)
  File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 327, in _get_data_source
    (ds, dsname) = sources.find_source(
  File "/usr/lib/python3/dist-packages/cloudinit/sources/__init__.py", line 996, in find_source
    ds_list = list_sources(cfg_list, ds_deps, pkg_list)
  File "/usr/lib/python3/dist-packages/cloudinit/sources/__init__.py", line 1043, in list_sources
    m_locs, _looked_locs = importer.find_module(
  File "/usr/lib/python3/dist-packages/cloudinit/importer.py", line 70, in find_module
    if not importlib.util.find_spec(full_path):
  File "/usr/lib/python3.8/importlib/util.py", line 94, in find_spec
    parent = __import__(parent_name, fromlist=['__path__'])
ModuleNotFoundError: No module named 'DataSourcenocloud-net;s=http://10'


Version after proposed upgrade: /usr/bin/cloud-init 23.2.2-0ubuntu0~20.04.1

hostname after upgrade:

/var/log/cloud-init.log snippets of reboot after upgrade:
2023-08-04 19:11:47,922 - __init__.py[DEBUG]: Looking for data source in: ['nocloud-net', 'None'], via packages ['
', 'cloudinit.sources'] that matches dependencies ['FILESYSTEM', 'NETWORK']
2023-08-04 19:11:47,923 - __init__.py[DEBUG]: Searching for network data source in: ['DataSourceNoCloudNet', 'DataSourceNone']
2023-08-04 19:11:47,923 - handlers.py[DEBUG]: start: init-network/search-NoCloudNet: searching for network data from DataSourceNoCloudNet
2023-08-04 19:11:47,923 - __init__.py[DEBUG]: Seeing if we can get any data from <class 'cloudinit.sources.DataSourceNoCloud.DataSourceNoCloudNet'>
2023-08-04 19:11:47,923 - __init__.py[DEBUG]: Update datasource metadata and network config due to events: boot-new-instance
2023-08-04 19:11:47,923 - __init__.py[DEBUG]: Detected platform: DataSourceNoCloudNet [seed=None][dsmode=net]. Checking for active instance data

2023-08-04 19:11:48,579 - url_helper.py[DEBUG]: [0/11] open 'http://10.0.2.2/meta-data' with {'url': 'http://10.0.2.2/meta-data', 'stream': False, 'allow_redirects': True, 'method': 'GET', 'headers': {'User-Agent': 'Cloud-Init/23.2.2-0ubuntu0~20.04.1'}} configuration
2023-08-04 19:11:48,587 - url_helper.py[DEBUG]: Read from http://10.0.2.2/meta-data (200, 52b) after 1 attempts
2023-08-04 19:11:48,587 - util.py[DEBUG]: Attempting to load yaml from string of length 52 with allowed root types (<class 'dict'>,)
2023-08-04 19:11:48,588 - url_helper.py[DEBUG]: [0/11] open 'http://10.0.2.2/user-data' with {'url': 'http://10.0.2.2/user-data', 'stream': False, 'allow_redirects': True, 'method': 'GET', 'headers': {'User-Agent': 'Cloud-Init/23.2.2-0ubuntu0~20.04.1'}} configuration
2023-08-04 19:11:48,593 - url_helper.py[DEBUG]: Read from http://10.0.2.2/user-data (200, 60b) after 1 attempts
2023-08-04 19:11:48,593 - url_helper.py[DEBUG]: [0/11] open 'http://10.0.2.2/vendor-data' with {'url': 'http://10.0.2.2/vendor-data', 'stream': False, 'allow_redirects': True, 'method': 'GET', 'headers': {'User-Agent': 'Cloud-Init/23.2.2-0ubuntu0~20.04.1'}} configuration
2023-08-04 19:11:48,596 - url_helper.py[DEBUG]: Read from http://10.0.2.2/vendor-data (200, 0b) after 1 attempts
2023-08-04 19:11:48,596 - DataSourceNoCloud.py[DEBUG]: Using seeded cache data from http://10.0.2.2/