Comment 10 for bug 1688606

I'm attaching version 2 of this script.
The changes from the first are from actually attempting the sru.
What I found was that
a.) trusty's initramfs built from linux-image-virtual cannot mount iso9660 or vfat filesystems.
   As a result I changed to using a command line parameter:
    ds=nocloud-net;seedfrom=http://../
   The url is the same as the file url and the user-data and meta-data just come from
   that location rather than the nocloud seed.img

b.) trusty needed more memory.
   I could have just added '-m 2G' instead of '-m 1G' on the qemu-system-x86_64 line.
   Instead I passed 'rootflags=size=75%' on the kernel command line. those get passed on
   to the mount of the tmpfs and all is well.