Re: Persistent storage for docker containers from a Gluster volume

[Erekle Magradze <erekle.magradze@xxxxxxxxxxxx>]

Hi,

glusterFS is working fine for large files (in most of the cases it's used for VM image store), with docker you'll generate bunch of small size files and if you want to have a good performance may be look in [1] and [2].

Also two node replica is a bit dangerous in case of high load with small files there is a good risk of split brain situation, therefore think about arbiter functionality of gluster [3], I think if you'll apply recommendations from [1] and [2] and deploy arbiter volume.

Cheers

Erekle

[1] http://blog.gluster.org/2016/10/gluster-tiering-and-small-file-performance/

[2] https://access.redhat.com/documentation/en-US/Red_Hat_Storage/3/html/Administration_Guide/Small_File_Performance_Enhancements.html

[3] http://events.linuxfoundation.org/sites/events/files/slides/glusterfs-arbiter-VAULT-2016.pdf

On 29.06.2017 11:55, Raghavendra Talur wrote:

On 28-Jun-2017 5:49 PM, "mabi" <mabi@xxxxxxxxxxxxx> wrote:

Anyone?

-------- Original Message --------

Subject: Persistent storage for docker containers from a Gluster volume

Local Time: June 25, 2017 6:38 PM

UTC Time: June 25, 2017 4:38 PM

From: mabi@xxxxxxxxxxxxx

To: Gluster Users <gluster-users@xxxxxxxxxxx>

Hello,

I have a two node replica 3.8 GlusterFS cluster and am trying to find out the best way to use a GlusterFS volume as persistent storage for docker containers to store their data (e.g. web assets).

I was thinking that the simplest method would be to mount my GlusterFS volume for that purpose on all docker nodes using FUSE and then simply start containers which require persistent storage with a mount of bind type. For example here is how I would create my container requiring persistent storage:

docker service create --name testcontainer --mount type=bind,source=/mnt/gustervol/testcontainer,target=/mnt alpine

What do you think about that? Is this a good way? or is the even a better way?

If you are using kubernetes, then please have a look at 

https://github.com/gluster/gluster-kubernetes

Otherwise, what you are suggesting works. 

Raghavendra Talur 

Regards,

M.

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