[openstack-dev] [Fuel] Diagnostic snapshot generation is broken due to lack of disk space

Oleg Gelbukh ogelbukh at mirantis.com
Tue Jan 12 12:51:24 UTC 2016

I think we need to find a way to:

1) verify the size of snapshot without actually making it and compare to
the available disk space beforehand.
2) refuse to create snapshot if space is insufficient and notify user
(otherwise it breaks Admin node as we have seen)
3) provide a way to prioritize elements of the snapshot and exclude them
based on the priorities or user choice.

This will allow for better and safer UX with the snapshot.

Best regards,
Oleg Gelbukh

On Tue, Jan 12, 2016 at 1:47 PM, Maciej Kwiek <mkwiek at mirantis.com> wrote:

> Hi!
> I need some advice on how to tackle this issue. There is a bug [1]
> describing the problem with creating a diagnostic snapshot. The issue is
> that /var/log has 100GB available, while /var (where diagnostic snapshot is
> being generated - /var/www/nailgun/dump/fuel-snapshot according to [2]) has
> 10GB available, so dumping the logs can be an issue when logs size exceed
> free space in /var.
> There are several things we could do, but I am unsure on which course to
> take. Should we
> a) Allocate more disk space for /var/www (or for whole /var)?
> b) Make the snapshot location share the diskspace of /var/log?
> c) Something else? What?
> Please share your thoughts on this.
> Cheers,
> Maciej Kwiek
> [1] https://bugs.launchpad.net/fuel/+bug/1529182
> [2]
> https://github.com/openstack/fuel-web/blob/2855a9ba925c146b4802ab3cd2185f1dce2d8a6a/nailgun/nailgun/settings.yaml#L717
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