Comment 17 for bug 1575572

The fix seems to work for me. Here's what I did to check:

I used a VM (xenial_test) booted from a pristine copy of the image at <https://uec-images.ubuntu.com/xenial/20160528/xenial-server-cloudimg-amd64-disk1.img> in a local OpenStack environment to verify the fix. I modified the VM to enable -proposed, and upgraded init-system-helpers to the -proposed package:

sudo apt-get install init-system-helpers=1.29ubuntu2

I then shut down the VM and generated a new image from it:

nova image-create xenial_test lp1575572-test-img

Finally, I tested with both Cloud Config data and User-Data script syntax:

1) Cloud Config

cat cloud_conf.yaml
#cloud-config
packages:
- apache2
runcmd:
- "nc -k -l -d 443&"

 nova boot --key-name $KEY --flavor m1.small --image lp1575572-test-img --user-data cloud_conf.yaml lp1575572-test-vm

SSH-ing to the instance:

$ sudo systemctl status apache2
● apache2.service - LSB: Apache2 web server
   Loaded: loaded (/etc/init.d/apache2; bad; vendor preset: enabled)
  Drop-In: /lib/systemd/system/apache2.service.d
           └─apache2-systemd.conf
   Active: active (running) since Tue 2016-05-31 07:23:45 UTC; 40s ago
     Docs: man:systemd-sysv-generator(8)
    Tasks: 55
   Memory: 6.5M
      CPU: 87ms
   CGroup: /system.slice/apache2.service
           ├─2321 /usr/sbin/apache2 -k start
           ├─2324 /usr/sbin/apache2 -k start
           └─2325 /usr/sbin/apache2 -k start

May 31 07:23:44 lp1575572-test-vm systemd[1]: Starting LSB: Apache2 web server...
May 31 07:23:44 lp1575572-test-vm apache2[2297]: * Starting Apache httpd web server apache2
May 31 07:23:45 lp1575572-test-vm apache2[2297]: *
May 31 07:23:45 lp1575572-test-vm systemd[1]: Started LSB: Apache2 web server.

# ==> pass

2) User Data

$ cat user-data.sh
#!/bin/sh

output_runlevel() {
echo -n "Current runlevel is "
sudo /sbin/runlevel
}
output_runlevel
sudo DEBIAN_FRONTEND=noninteractive apt-get -q -y update
#sudo sed -ie 's/set +e$/& -x/' /usr/sbin/invoke-rc.d
output_runlevel
sudo DEBIAN_FRONTEND=noninteractive apt-get install -q -y apache2
output_runlevel
sudo nc -k -l -d 443&

nova boot --key-name $KEY --flavor m1.small --image lp1575572-test-img --user-data user-data.sh lp1575572-test-vm

SSH-ing to the instance:

$ sudo systemctl status apache2
● apache2.service - LSB: Apache2 web server
   Loaded: loaded (/etc/init.d/apache2; bad; vendor preset: enabled)
  Drop-In: /lib/systemd/system/apache2.service.d
           └─apache2-systemd.conf
   Active: active (running) since Tue 2016-05-31 07:29:40 UTC; 1min 20s ago
     Docs: man:systemd-sysv-generator(8)
    Tasks: 55
   Memory: 6.6M
      CPU: 119ms
   CGroup: /system.slice/apache2.service
           ├─2332 /usr/sbin/apache2 -k start
           ├─2335 /usr/sbin/apache2 -k start
           └─2336 /usr/sbin/apache2 -k start

May 31 07:29:38 lp1575572-test-vm systemd[1]: Starting LSB: Apache2 web server...
May 31 07:29:38 lp1575572-test-vm apache2[2308]: * Starting Apache httpd web server apache2
May 31 07:29:40 lp1575572-test-vm apache2[2308]: *
May 31 07:29:40 lp1575572-test-vm systemd[1]: Started LSB: Apache2 web server.

# ==> pass