Re: Access to Servers hangs after stop one server...

Scott Worthington <scott.c.worthington@xxxxxxxxx> · Thu, 24 Jan 2019 08:27:45 -0500

I think your mount statement in /etc/fstab is only referencing ONE of the gluster servers.

Please take a look at "More redundant mount" section:

https://www.jamescoyle.net/how-to/439-mount-a-glusterfs-volume

Then try taking down one of the gluster servers and report back results.

On Thu, Jan 24, 2019 at 8:24 AM Gilberto Nunes <gilberto.nunes32@xxxxxxxxx> wrote:
Yep! But as I mentioned in previously e-mail, even with 3 or 4 servers this issues occurr.
I don't know what's happen.

---
Gilberto Nunes Ferreira

(47) 3025-5907
(47) 99676-7530 - Whatsapp / Telegram
Skype: gilberto.nunes36

Em qui, 24 de jan de 2019 às 10:43, Diego Remolina <dijuremo@xxxxxxxxx> escreveu:
Glusterfs needs quorum, so if you have two servers and one goes down, there is no quorum, so all writes stop until the server comes back up. You can add a third server as an arbiter which does not store data in the bricks, but still uses some minimal space (to keep metadata for the files).
HTH,

DIego

On Wed, Jan 23, 2019 at 3:06 PM Gilberto Nunes <gilberto.nunes32@xxxxxxxxx> wrote:
Hit there...
I have set up two server as replica, like this:

gluster vol create Vol01 server1:/data/storage server2:/data/storage

Then I create a config file in client, like this:
volume remote1
 type protocol/client
 option transport-type tcp
 option remote-host server1
 option remote-subvolume /data/storage
 end-volume

 volume remote2
 type protocol/client
 option transport-type tcp
 option remote-host server2
 option remote-subvolume /data/storage
 end-volume

 volume replicate
 type cluster/replicate
 subvolumes remote1 remote2
 end-volume

 volume writebehind
 type performance/write-behind
 option window-size 1MB
 subvolumes replicate
 end-volume

 volume cache
 type performance/io-cache
 option cache-size 512MB
 subvolumes writebehind
 end-volume

And add this line in /etc/fstab

/etc/glusterfs/datastore.vol /mnt glusterfs defaults,_netdev 0 0

After mount /mnt, I can access the servers. So far so good!
But when I make server1 crash, I was unable to access /mnt or even use 
gluster vol status
on server2

Everything hangon!

I have tried with replicated, distributed and replicated-distributed too.
I am using Debian Stretch, with gluster package installed via apt, provided by Standard Debian Repo, glusterfs-server 3.8.8-1

I am sorry if this is a  newbie question, but glusterfs share it's not suppose to keep online if one server goes down?

Any adviced will be welcome

Best

---
Gilberto Nunes Ferreira

(47) 3025-5907
(47) 99676-7530 - Whatsapp / Telegram
Skype: gilberto.nunes36

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