Comment 6 for bug 1938207

I have modified the test script to install the package in proposed:
----------------------------------------------------------------------
import pycloudlib
import os

lxd = pycloudlib.LXDVirtualMachine("vm")

name = 'pycloudlib-vm'
release = "hirsute"
pub_key_path = "lxd-pubkey"
priv_key_path = "lxd-privkey"

userdata_cloud_id_fail = """\
#cloud-config
bootcmd:
 - cp /usr/bin/cloud-id /usr/bin/cloud-id.orig
 - 'echo "error" > /usr/bin/cloud-id'
 - chmod 755 /usr/bin/cloud-id
"""

pub_key, priv_key = lxd.create_key_pair()

with open(pub_key_path, "w") as f:
    f.write(pub_key)

with open(priv_key_path, "w") as f:
    f.write(priv_key)

lxd.use_key(
    public_key_path=pub_key_path,
    private_key_path=priv_key_path
)

image_id = lxd.released_image(release=release)
instance = lxd.launch(
    name=name,
    image_id=image_id,
    user_data=userdata_cloud_id_fail
)

print("--- Creating base instance")
print("ip address: ", instance.ip)
print("--- Make cloud-id command fail by changing the binary")
cloud_id = instance.execute("cloud-id")
print(cloud_id.stderr)
print("--- Running postinst script for current version of uaclient")
dpkg_out = instance.execute("sudo dpkg-reconfigure ubuntu-advantage-tools")
print(instance.execute("ua version"))
print(dpkg_out.stderr)
print("------------------")

cmd = "sudo sh -c \"echo 'deb http://archive.ubuntu.com/ubuntu/ {}-proposed restricted main multiverse universe' >> /etc/apt/sources.list.d/proposed-repositories.list\""
print("--- Updating ua package")
out = instance.execute(cmd.format(release))
instance.execute("sh -c 'sudo apt-get update -q > /dev/null'")
instance.execute("sh -c 'sudo apt-get install ubuntu-advantage-tools > /dev/null'")
print(instance.execute("ua version"))
dpkg_out = instance.execute("sudo dpkg-reconfigure ubuntu-advantage-tools")
print(dpkg_out.stderr)
print("------------------")
instance.delete()
--------------------------------------------

Currently, pycloudlib doesn't support launching hirsute or impish vms
Therefore, the test results here are for xenial, bionic and focal.

I will run this test for hirsute and impish through multipass.

PS: this bug should not affect xenial releases