[ceph-users] mount cephfs on ceph servers

Marc Roos M.Roos at f1-outsourcing.eu
Thu Mar 7 00:56:28 PST 2019


 

Container =  same kernel, problem is with processes using the same 
kernel. 






-----Original Message-----
From: Daniele Riccucci [mailto:devster at posteo.net] 
Sent: 07 March 2019 00:18
To: ceph-users at lists.ceph.com
Subject: Re: [ceph-users] mount cephfs on ceph servers

Hello,
is the deadlock risk still an issue in containerized deployments? For 
example with OSD daemons in containers and mounting the filesystem on 
the host machine?
Thank you.

Daniele

On 06/03/19 16:40, Jake Grimmett wrote:
> Just to add "+1" on this datapoint, based on one month usage on Mimic
> 13.2.4 essentially "it works great for us"
> 
> Prior to this, we had issues with the kernel driver on 12.2.2. This 
> could have been due to limited RAM on the osd nodes (128GB / 45 OSD), 
> and an older kernel.
> 
> Upgrading the RAM to 256GB and using a RHEL 7.6 derived kernel has 
> allowed us to reliably use the kernel driver.
> 
> We keep 30 snapshots ( one per day), have one active metadata server, 
> and change several TB daily - it's much, *much* faster than with fuse.
> 
> Cluster has 10 OSD nodes, currently storing 2PB, using ec 8:2 coding.
> 
> ta ta
> 
> Jake
> 
> 
> 
> 
> On 3/6/19 11:10 AM, Hector Martin wrote:
>> On 06/03/2019 12:07, Zhenshi Zhou wrote:
>>> Hi,
>>>
>>> I'm gonna mount cephfs from my ceph servers for some reason, 
>>> including monitors, metadata servers and osd servers. I know it's 
>>> not a best practice. But what is the exact potential danger if I 
>>> mount cephfs from its own server?
>>
>> As a datapoint, I have been doing this on two machines (single-host 
>> Ceph
>> clusters) for months with no ill effects. The FUSE client performs a 
>> lot worse than the kernel client, so I switched to the latter, and 
>> it's been working well with no deadlocks.
>>
> _______________________________________________
> ceph-users mailing list
> ceph-users at lists.ceph.com
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> 
_______________________________________________
ceph-users mailing list
ceph-users at lists.ceph.com
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com




More information about the ceph-users mailing list