[Bug 1410835] Re: Azure ephemeral disk and custom mount points

[Daniel Watkins]

Hi trialotto,

cloud-init has default settings for Azure instances that ensure that the
first partition of the ephemeral disk is formatted as ext4. It does this
by providing default values for disk_setup and fs_setup; you can see
these at http://bazaar.launchpad.net/~cloud-init-dev/cloud-
init/trunk/view/head:/cloudinit/sources/DataSourceAzure.py#L54.

cloud-init, by default, mounts the first partition of the first
ephemeral disk at /mnt. You can see the code that does this at
http://bazaar.launchpad.net/~cloud-init-dev/cloud-
init/trunk/view/head:/cloudinit/config/cc_mounts.py#L236.

If you are changing the layout of the disk, you will also need to
provide mount configuration (using the `mounts` configuration key) so
that cloud-init knows what it should mount where. We could, potentially,
look at making cloud-init a little smarter about automatically working
out mounts, but this would require a fair bit of testing across
different platforms.

Please let me know if this addresses your issues.


Thanks,

Dan

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https://bugs.launchpad.net/bugs/1410835

Title:
  Azure ephemeral disk and custom mount points

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