Comment 5 for bug 1460715

$ dpkg-query --show cloud-init
cloud-init 0.7.8-49-g9e904bb-0ubuntu1~16.04.2

$ cat /etc/cloud/build.info
build_name: server
serial: 20161214

$ df
Filesystem 1K-blocks Used Available Use% Mounted on
udev 1018216 0 1018216 0% /dev
tmpfs 204836 3180 201656 2% /run
/dev/vda1 20263528 973360 19273784 5% /
tmpfs 1024172 0 1024172 0% /dev/shm
tmpfs 5120 0 5120 0% /run/lock
tmpfs 1024172 0 1024172 0% /sys/fs/cgroup
tmpfs 204836 0 204836 0% /run/user/1000

$ grep [sv]db /proc/partitions
 253 16 41943040 vdb
 253 17 27682406 vdb1
 253 18 14259200 vdb2

$ cat /etc/fstab
LABEL=cloudimg-rootfs / ext4 defaults 0 0
/dev/vdb1 /mnt2 auto defaults,nofail,x-systemd.requires=cloud-init.service,comment=cloudconfig 0 2
/dev/vdb2 none swap sw,comment=cloudconfig 0 0

$ sudo mount -a

$ df -h /mnt2
Filesystem Size Used Avail Use% Mounted on
/dev/vdb1 26G 44M 25G 1% /mnt2
$ free
              total used free shared buff/cache available
Mem: 2048348 48596 1857652 3208 142100 1844252
Swap: 14259196 0 14259196
$ grep [vs]db2 /proc/swaps
/dev/vdb2 partition 14259196 0 -1