title: Google cloud after VM Import no free space available on root drive
body: <p>I created a Postgres server locally using virualbox using Ubuntu 16.04.  Using the import tool to move it to Google cloud seemed to work fine, but the root drive shows 100% full.  None of the disk expansion instructions (including creating a snapshot and recreating the boot drive) seem to make any space available.</p>
  
  <p>There seems to be a boot drive and a root drive.  But the root drive shows it is all used.  The boot drive shows space available, but it should be 15G in size not 720M.</p>
  
  <pre><code>Filesystem                     Size  Used Avail Use% Mounted on
  udev                           1.8G     0  1.8G   0% /dev
  tmpfs                          370M  5.3M  365M   2% /run
  /dev/mapper/techredo--vg-root  2.5G  2.5G     0 100% /
  tmpfs                          1.9G     0  1.9G   0% /dev/shm
  tmpfs                          5.0M     0  5.0M   0% /run/lock
  tmpfs                          1.9G     0  1.9G   0% /sys/fs/cgroup
  /dev/sdb1                      720M  121M  563M  18% /boot
  tmpfs                          370M     0  370M   0% /run/user/406485188
  </code></pre>