Re: Is mon initial members used after the first quorum?

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What version is he running?

Joao, does this make any sense to you?
-Greg

On Wed, Dec 10, 2014 at 11:54 AM, Christopher Armstrong
<chris@xxxxxxxxxxxx> wrote:
> Thanks Greg - I thought the same thing, but confirmed with the user that it
> appears the radosgw client is indeed using initial members - when he added
> all of his hosts to initial members, things worked just fine. In either
> event, all of the monitors were always fully enumerated later in the config
> file. Is this potentially a bug specific to radosgw? Here's his config file:
>
> [global]
> fsid = fc0e2e09-ade3-4ff6-b23e-f789775b2515
> mon initial members = nodo-3
> auth cluster required = cephx
> auth service required = cephx
> auth client required = cephx
> osd pool default size = 3
> osd pool default min_size = 1
> osd pool default pg_num = 128
> osd pool default pgp_num = 128
> osd recovery delay start = 15
> log file = /dev/stdout
> mon_clock_drift_allowed = 1
>
>
> [mon.nodo-1]
> host = nodo-1
> mon addr = 192.168.2.200:6789
>
> [mon.nodo-2]
> host = nodo-2
> mon addr = 192.168.2.201:6789
>
> [mon.nodo-3]
> host = nodo-3
> mon addr = 192.168.2.202:6789
>
>
>
> [client.radosgw.gateway]
> host = deis-store-gateway
> keyring = /etc/ceph/ceph.client.radosgw.keyring
> rgw socket path = /var/run/ceph/ceph.radosgw.gateway.fastcgi.sock
> log file = /dev/stdout
>
>
> On Wed, Dec 10, 2014 at 11:40 AM, Gregory Farnum <greg@xxxxxxxxxxx> wrote:
>>
>> On Tue, Dec 9, 2014 at 3:11 PM, Christopher Armstrong
>> <chris@xxxxxxxxxxxx> wrote:
>> > Hi folks,
>> >
>> > I think we have a bit of confusion around how initial members is used. I
>> > understand that we can specify a single monitor (or a subset of
>> > monitors) so
>> > that the cluster can form a quorum when it first comes up. This is how
>> > we're
>> > using the setting now - so the cluster can come up with just one
>> > monitor,
>> > with the other monitors to follow later.
>> >
>> > However, a Deis user reported that when the monitor in his initial
>> > members
>> > list went down, radosgw stopped functioning, even though there are three
>> > mons in his config file. I would think that the radosgw client would
>> > connect
>> > to any of the nodes in the config file to get the state of the cluster,
>> > and
>> > that the initial members list is only used when the monitors first come
>> > up
>> > and are trying to achieve quorum.
>> >
>> > The issue he filed is here: https://github.com/deis/deis/issues/2711
>> >
>> > He also found this Ceph issue filed:
>> > https://github.com/ceph/ceph/pull/1233
>>
>> Nope, this has nothing to do with it.
>>
>> >
>> > Is that what we're seeing here? Can anyone point us in the right
>> > direction?
>>
>> I didn't see the actual conf file posted anywhere to look at, but my
>> guess is simply that (since it looks like you're using generated conf
>> files which can differ across hosts) that the one on the server(s) in
>> question don't have the monitors listed in them. I'm only skimming the
>> code, but from it and my recollection, when a Ceph client starts up it
>> will try to assemble a list of monitors to contact from:
>> 1) the contents of the "mon host" config entry
>> 2) the "mon addr" value in any of the "global", "mon" or "mon.X" sections
>>
>> The clients don't even look at mon_initial_members that I can see,
>> actually — so perhaps your client config only lists the initial
>> monitor, without adding the others?
>> -Greg
>
>
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