Step: lvcreate
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Create an LVM2 logical volume (LV) in an existing volume group.

Step keys:

* `lvcreate` &mdash; REQUIRED; value is the tag for the volume group.

* `name` &mdash; REQUIRED; tag for the new LV block device.

* `size` &mdash; REQUIRED; size of the new LV. The special value `fill` will
  make the volume use all of the available space.

Example (in the .vmdb file):

    - lvcreate: rootvg
      name: rootfs
      size: 1G
