$ cat /tmp/my.apache
#!/bin/sh
exec >/run/my.log 2>&1
export DEBIAN_FRONTEND=noninteractive
#export http_proxy=http://10.7.1.130:3128/ https_proxy=http://10.7.1.130:3128/
apt-get -q -y update

## the apache sysv init job sources this, so we just hack our
## way into some logging this way.
#cat >> /lib/lsb/init-functions <<"EOF"
#[ -d /run/hack ] || mkdir -p /run/hack
#exec >/run/hack/$$.out 2>&1
#set -x
#EOF
apt-get install -q -y apache2
ret=$?
echo "got $?"
exit $ret
## end my.apache ##

$ userdata=$(cat /tmp/my.apache)
$ lxc launch xenial x1 "--config=user.user-data=$userdata"


## now jump inside
$ lxc exec x1 /bin/bash


## inside now
root@x1:~# pastebinit /run/my.log 
http://paste.ubuntu.com/16081365/

root@x1:~# grep WARN /var/log/cloud-init.log 
Apr 27 14:21:27 ubuntu [CLOUDINIT] debian.py[WARNING]: removed /etc/network/interfaces.d/eth0.cfg with known contents

root@x1:~# 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: inactive (dead)
     Docs: man:systemd-sysv-generator(8)

root@x1:~# ls -l /var/log/apache2/
total 2
-rw-r----- 1 root adm 0 Apr 27 14:21 access.log
-rw-r----- 1 root adm 0 Apr 27 14:21 error.log
-rw-r----- 1 root adm 0 Apr 27 14:21 other_vhosts_access.log

root@x1:~# pastebinit /var/log/apt/history.log 
http://paste.ubuntu.com/16081448/

root@x1:~# pastebinit /var/log/dpkg.log        
http://paste.ubuntu.com/16081453/