ephemeral disk defaults to vfat filesystem

[Ryan Beisner]

The default filesystem for ephemeral disks in instances is vfat, when ext4 is expected and was the prior default.

A work-around is to set the default_ephemeral_format value to ext4 via the config-flags charm config option:
  options:
    config-flags: default_ephemeral_format=ext4

The charm should expose that as a config option, with a default value of ext4. The vfat filesystem format is generally not very useful for Linux instances, which is likely the majority of instances across typical Ubuntu OpenStack users. In cases where other values are needed, this would provide a mechanism to reconfigure the option.

See also: https://openstack-in-production.blogspot.com/2015/

[James Page (james-page)]

Is this also configurable using metadata on images?

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/637611
Committed: https://git.openstack.org/cgit/openstack/charm-nova-compute/commit/?id=37ff6ded8bdbbe480baa4db4627d6cc889d2e3ef
Submitter: Zuul
Branch: master

commit 37ff6ded8bdbbe480baa4db4627d6cc889d2e3ef
Author: Andre Ruiz <email address hidden>
Date: Mon Feb 18 12:56:04 2019 -0300

    Implement new option: default_ephemeral_format

    This change implements a new option in config.yaml that sets the
    default format for new ephemeral volumes attached to instances.

    Closes-Bug: #1693943
    Change-Id: Iff9254039fa6f1cef9d80c0d59de8e37b39e30f0