[PVE-User] Proxmox CEPH 6 servers failures!

Alexandre DERUMIER aderumier at odiso.com
Fri Oct 5 14:43:27 CEST 2018


>>Nice.. Perhaps if I create a VM in Proxmox01 and Proxmox02, and join this
>>VM into Cluster Ceph, can I solve to quorum problem?

you could have 1VM (only one)  , but you need to replicate it (syncronously) between the 2 proxmox server.
and you'll have a cluster hang until it's have failover.
maybe with drbd for example
here an old blog about this kind of setup
https://www.sebastien-han.fr/blog/2013/01/28/ceph-geo-replication-sort-of/




The only clean way, to have a ceph cluster multi site,
is to have 3 sites, with 1 monitor on each site. (and multiple network links between sites).

BTW, if your second site have a powerfailure, you're ceph cluster will hang too on 1st site.(you'll lost quorum too)

and you also need to configure the crushmap to get replication working correctly between the site.







----- Mail original -----
De: "Gilberto Nunes" <gilberto.nunes32 at gmail.com>
À: "proxmoxve" <pve-user at pve.proxmox.com>
Envoyé: Vendredi 5 Octobre 2018 14:31:20
Objet: Re: [PVE-User] Proxmox CEPH 6 servers failures!

Nice.. Perhaps if I create a VM in Proxmox01 and Proxmox02, and join this 
VM into Cluster Ceph, can I solve to quorum problem? 
--- 
Gilberto Nunes Ferreira 

(47) 3025-5907 
(47) 99676-7530 - Whatsapp / Telegram 

Skype: gilberto.nunes36 





Em sex, 5 de out de 2018 às 09:23, dorsy <dorsyka at yahoo.com> escreveu: 

> Your question has already been answered. You need majority to have quorum. 
> 
> On 2018. 10. 05. 14:10, Gilberto Nunes wrote: 
> > Hi 
> > Perhaps this can help: 
> > 
> > https://imageshack.com/a/img921/6208/X7ha8R.png 
> > 
> > I was thing about it, and perhaps if I deploy a VM in both side, with 
> > Proxmox and add this VM to the CEPH cluster, maybe this can help! 
> > 
> > thanks 
> > --- 
> > Gilberto Nunes Ferreira 
> > 
> > (47) 3025-5907 
> > (47) 99676-7530 - Whatsapp / Telegram 
> > 
> > Skype: gilberto.nunes36 
> > 
> > 
> > 
> > 
> > 
> > Em sex, 5 de out de 2018 às 03:55, Alexandre DERUMIER < 
> aderumier at odiso.com> 
> > escreveu: 
> > 
> >> Hi, 
> >> 
> >> Can you resend your schema, because it's impossible to read. 
> >> 
> >> 
> >> but you need to have to quorum on monitor to have the cluster working. 
> >> 
> >> 
> >> ----- Mail original ----- 
> >> De: "Gilberto Nunes" <gilberto.nunes32 at gmail.com> 
> >> À: "proxmoxve" <pve-user at pve.proxmox.com> 
> >> Envoyé: Jeudi 4 Octobre 2018 22:05:16 
> >> Objet: [PVE-User] Proxmox CEPH 6 servers failures! 
> >> 
> >> Hi there 
> >> 
> >> I have something like this: 
> >> 
> >> CEPH01 ----| 
> >> |----- CEPH04 
> >> | 
> >> | 
> >> CEPH02 ----|-----------------------------------------------------|---- 
> >> CEPH05 
> >> | Optic Fiber 
> >> | 
> >> CEPH03 ----| 
> >> |--- CEPH06 
> >> 
> >> Sometime, when Optic Fiber not work, and just CEPH01, CEPH02 and CEPH03 
> >> remains, the entire cluster fail! 
> >> I find out the cause! 
> >> 
> >> ceph.conf 
> >> 
> >> [global] auth client required = cephx auth cluster required = cephx auth 
> >> service required = cephx cluster network = 10.10.10.0/24 fsid = 
> >> e67534b4-0a66-48db-ad6f-aa0868e962d8 keyring = 
> >> /etc/pve/priv/$cluster.$name.keyring mon allow pool delete = true osd 
> >> journal size = 5120 osd pool default min size = 2 osd pool default size 
> = 
> >> 3 
> >> public network = 10.10.10.0/24 [osd] keyring = 
> >> /var/lib/ceph/osd/ceph-$id/keyring [mon.pve-ceph01] host = pve-ceph01 
> mon 
> >> addr = 10.10.10.100:6789 mon osd allow primary affinity = true 
> >> [mon.pve-ceph02] host = pve-ceph02 mon addr = 10.10.10.110:6789 mon osd 
> >> allow primary affinity = true [mon.pve-ceph03] host = pve-ceph03 mon 
> addr 
> >> = 
> >> 10.10.10.120:6789 mon osd allow primary affinity = true 
> [mon.pve-ceph04] 
> >> host = pve-ceph04 mon addr = 10.10.10.130:6789 mon osd allow primary 
> >> affinity = true [mon.pve-ceph05] host = pve-ceph05 mon addr = 
> >> 10.10.10.140:6789 mon osd allow primary affinity = true 
> [mon.pve-ceph06] 
> >> host = pve-ceph06 mon addr = 10.10.10.150:6789 mon osd allow primary 
> >> affinity = true 
> >> 
> >> Any help will be welcome! 
> >> 
> >> --- 
> >> Gilberto Nunes Ferreira 
> >> 
> >> (47) 3025-5907 
> >> (47) 99676-7530 - Whatsapp / Telegram 
> >> 
> >> Skype: gilberto.nunes36 
> >> _______________________________________________ 
> >> pve-user mailing list 
> >> pve-user at pve.proxmox.com 
> >> https://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user 
> >> 
> >> _______________________________________________ 
> >> pve-user mailing list 
> >> pve-user at pve.proxmox.com 
> >> https://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user 
> >> 
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> > pve-user mailing list 
> > pve-user at pve.proxmox.com 
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