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On 2/24/19 9:41 AM, Peter Robinson
wrote:
Hi all,
Thank you for all your answers.
I give yoy a little more details about the why i am
here 😊
I want to learn ceph, and i am really having no
knowledge on ceph.
I decided to follow the official doc on ceph.com site. It is said to use ceph-deploy which is not working.
I tried to upgraded it following ceph documentation and
then i was in this ceph repos story and ceph compilation!
I have log a bug for ceph-deploy. With no working
answer.
For your info
Compilation is still on going
Why are you compiling it, why don't you just "dnf
install" it, the Fedora packages are maintained by the ceph
team.
I first installed it, and also tried to use ceph-deploy, which
did not work.
(compilation failed for a "no space left on device" issue (35GB
for ceph directory - 82% done in 3 days - that's not so bad for
this small cpu :))
I am trying qemu emulation to check is it is faster
Why wouldn't you just use the native arch of the machine
you're running on in VMs that using qemu emulation?
I tried qemu instead of cross compilation. (by the way, how is
created the SD image?)
Fox
I ll try your proposals on tomorrow
Thanks
Le sam. 23 févr. 2019 à 09:41, Patrick
Charles François Ernzer < pcfe@xxxxxxxxxx> a
écrit :
Hello,
> I am trying to build a ceph cluster based on 4
raspberry3B+.
As long as you have very realistic expectations as to
the performance and reliability you will get out of 4
severely underpowered (for Ceph) nodes, why not.
I do nearly the same, simply to learn Ceph, with 5
ODROID-HC2 (more bang than the 3B+ but 32 bit). I
would not dream of expecting even wire speed out of
SBCs with 2GiB RAM, a single Gigabit network
connection attached via USB and SATA via USB.
> Following the official CEPH documentation is a
dead end as packages are only available for
> readhat/centos and not fedora !
As was pointed out, your Raspis should find the
packages in the repos. Please provide the output of
the yum commands that Troy Dawson mailed. Maybe your
repository setup has an issue.
You can view all builds of ceph for Fedora at https://koji.fedoraproject.org/koji/search?match=glob&type=package&terms=ceph
It's built for
- aarch64
- ppc64le
- s390x
- x86_64
> I tried to used the el7 repository but the are
conflicts
> and lacks with fedora repos.
Yeah, I would not attempt to mix that way.
> Did I miss something ?
If "dnf search ceph" shows you results, then you might
be trying to install Ceph wrongly. Are you using
ceph-ansible? I definitely recommend you do.
http://docs.ceph.com/ceph-ansible/stable-3.2/
or, if not using Luminous, but master
http://docs.ceph.com/ceph-ansible/master/
although I recommend you start with a stable version
if this is your first foray into Ceph.
> I am now trying to compile from sources. it is
still ongoing ( 16% after 24h !)
Yeah, that will take a while. I'd be too impatient for
that ;-)
On Ceph itself, I am happily playing with Ceph
Luminous using Bluestore, if you want Luminous too, be
sure to use the stable-3.2 branch of ceph-ansible, as
documented.
As my SBC definitely are at the lowest end of http://docs.ceph.com/docs/master/start/hardware-recommendations/
I adjusted
osd_memory_target http://docs.ceph.com/docs/mimic/rados/configuration/bluestore-config-ref/
I expect to have to do many more tunings in the days
and weeks to come.
As always with a cluster, you may want to consider:
- using monitoring to notice if one of many nodes is
down
- using a watchdog to bounce nodes that are
unresponsive
- wiring up serial consoles and logging to a logserver
pcfe
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