Re: [Gluster-devel] Gluster Docker images are available at docker hub

[Humble Devassy Chirammal <humble.devassy@xxxxxxxxx>]

> Yeah this followed by glusterd restart should help
>
> But frankly, i was hoping that 'rm' the file isn't a neat way to fix this
> issue

>>Why is rm not a neat way? Is it because the container deployment tool needs to
>>know about gluster internals? But isn't a Dockerfile dealing with details
>>of the service(s) that is being deployment in a container.

I do think fixing the dockerfile is *not* the correct way. That said, the use case is not just

containers. This issue can pop up in Ovirt or virtualization environments as well.

The VM template may have pre configured glusterd in it and the pool created out of this template

can show the same behaviour.

I believe fixing it in gluster code base would be the right thing to do.

Thanks Atin for the heads up!

> AFAICT we have 2 scenarios:
>
> 1) Non-container scenario, where the current behaviour of glusterd persisting
> the info in .info file makes sense
>
> 2) Container scenario, where the same image gets used as the base, hence all
> containers gets the same UUID
> For this we can have an option to tell glusterd that instructs it to refresh
> the UUID during next start.
>

--Humble

On Wed, Jul 1, 2015 at 11:32 AM, Krishnan Parthasarathi <kparthas@xxxxxxxxxx> wrote:

> Yeah this followed by glusterd restart should help
>
> But frankly, i was hoping that 'rm' the file isn't a neat way to fix this
> issue

Why is rm not a neat way? Is it because the container deployment tool needs to
know about gluster internals? But isn't a Dockerfile dealing with details
of the service(s) that is being deployment in a container.

> AFAICT we have 2 scenarios:
>
> 1) Non-container scenario, where the current behaviour of glusterd persisting
> the info in .info file makes sense
>
> 2) Container scenario, where the same image gets used as the base, hence all
> containers gets the same UUID
> For this we can have an option to tell glusterd that instructs it to refresh
> the UUID during next start.
>
> Maybe somethign like presence of a file /var/lib/glusterd/refresh_uuid makes
> glusterd refresh the UUID in .info
> and then delete this file, that ways, Dockerfile can touch this file, post
> gluster rpm install step and things should
> work as expected ?

If container deployment needs are different it should should address issues like
above. If we start addressing glusterd's configuration handling for every
new deployment technology it would quickly become unmaintainable.

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