Re: [ceph-users] Ceph monitor problems

2013-10-30 Thread Mike Dawson
Aaron, Don't mistake valid for advisable. For documentation purposes, three monitors is the advisable initial configuration for multi-node ceph clusters. If there is a valid need for more than three monitors, it is advisable to add them two at a time to maintain an odd number of total monitor

Re: [ceph-users] Ceph monitor problems

2013-10-30 Thread Joao Eduardo Luis
On 10/30/2013 08:46 PM, Aaron Ten Clay wrote: On Wed, Oct 30, 2013 at 1:43 PM, Joao Eduardo Luis mailto:joao.l...@inktank.com>> wrote: A quorum of 2 monitors is completely fine as long as both monitors are up. A quorum is always possible regardless of how many monitors you have, as

Re: [ceph-users] Ceph monitor problems

2013-10-30 Thread Aaron Ten Clay
On Wed, Oct 30, 2013 at 1:43 PM, Joao Eduardo Luis wrote: > > A quorum of 2 monitors is completely fine as long as both monitors are up. > A quorum is always possible regardless of how many monitors you have, as > long as a majority is up and able to form it (1 out of 1, 2 out of 2, 2 out > of 3,

Re: [ceph-users] Ceph monitor problems

2013-10-30 Thread Joao Eduardo Luis
On 10/30/2013 04:39 PM, Aaron Ten Clay wrote: It sounds like you tried to go from 1 monitor to 2 monitors, which is an unsupported configuration as far as I am aware. You must have either 1, or 3 or more monitors for a quorum to be possible. A quorum of 2 monitors is completely fine as long as

Re: [ceph-users] Ceph monitor problems

2013-10-30 Thread Karan Singh
ceph-users@lists.ceph.comSubject: Re: [ceph-users] Ceph monitor problems Hi AW Did you check on firewall ( iptables ) between the nodes. If this is a test cluster disable iptables and try. RegardsKaran Singh From: "alistair whittle" <alistair.whit...@barclays.com>To: ceph-users@lists.c

Re: [ceph-users] Ceph monitor problems

2013-10-30 Thread Aaron Ten Clay
From:* Karan Singh [mailto:ksi...@csc.fi] > *Sent:* Wednesday, October 30, 2013 2:49 PM > *To:* Whittle, Alistair: Investment Bank (LDN) > *Cc:* ceph-users@lists.ceph.com > *Subject:* Re: [ceph-users] Ceph monitor problems > > ** ** > > Hi AW > > ** ** > > Di

Re: [ceph-users] Ceph monitor problems

2013-10-30 Thread alistair.whittle
: Investment Bank (LDN) Cc: ceph-users@lists.ceph.com Subject: Re: [ceph-users] Ceph monitor problems Hi AW Did you check on firewall ( iptables ) between the nodes. If this is a test cluster disable iptables and try. Regards Karan Singh From: "alistair wh

Re: [ceph-users] Ceph monitor problems

2013-10-30 Thread alistair.whittle
Thanks Karan. I have checked and there are no iptables chains/rules configured. Any other ideas? From: Karan Singh [mailto:ksi...@csc.fi] Sent: Wednesday, October 30, 2013 2:49 PM To: Whittle, Alistair: Investment Bank (LDN) Cc: ceph-users@lists.ceph.com Subject: Re: [ceph-users] Ceph

Re: [ceph-users] Ceph monitor problems

2013-10-30 Thread Karan Singh
Hi AW Did you check on firewall ( iptables ) between the nodes. If this is a test cluster disable iptables and try. Regards Karan Singh - Original Message - From: "alistair whittle" To: ceph-users@lists.ceph.com Sent: Wednesday, 30 October, 2013 4:20:27 PM Subject: [ceph-users]