On Tue, Mar 25, 2014 at 12:28 PM, Alexandre DERUMIER <aderumier@xxxxxxxxx> wrote:
Hi, can you ping between your hosts ?
I can. And, from my first post, I can do things like "telnet 10.10.30.1 6789" from 10.10.30.0 to see that I can actually reach the monitor sockets.
(just to be sure, what is your netmask ? (as I see 10.10.30.0 for mon1)
Did you really see something that said 10.10.30.0 for mon1? Because it should be .1, not .0... .0 for mon0, .1 for mon1, etc.
Thanks for the response!
----- Mail original -----
De: "Travis Rhoden" <trhoden@xxxxxxxxx>
À: "ceph-users" <ceph-users@xxxxxxxx>
Envoyé: Mardi 25 Mars 2014 17:24:19
Objet: Re: Monitors stuck in "electing"
<blockquote>
Okay, last one until I get some guidance. Sorry for the spam, but wanted to paint a full picture. Here are debug logs from all three mons, capturing what looks like an election sequence to me:
ceph0:
2014-03-25 16:17:24.324846 7fa5c53fc700 5 mon.ceph0@0(electing).elector(35) start -- can i be leader?
2014-03-25 16:17:24.324900 7fa5c53fc700 1 mon.ceph0@0(electing).elector(35) init, last seen epoch 35
2014-03-25 16:17:24.324913 7fa5c53fc700 1 -- 10.10.30.0:6789/0 --> mon.1 10.10.30.1:6789/0 -- election(b3f38955-4321-4850-9ddb-3b09940dc951 propose 35) v4 -- ?+0 0x263d480
2014-03-25 16:17:24.324948 7fa5c53fc700 1 -- 10.10.30.0:6789/0 --> mon.2 10.10.30.2:6789/0 -- election(b3f38955-4321-4850-9ddb-3b09940dc951 propose 35) v4 -- ?+0 0x263d6c0
2014-03-25 16:17:25.353975 7fa5c4bfb700 1 -- 10.10.30.0:6789/0 <== mon.2 10.10.30.2:6789/0 493 ==== election(b3f38955-4321-4850-9ddb-3b09940dc951 propose 35) v4 ==== 537+0+0 (4036841703 0 0) 0x265fd80 con 0x1df0c60
2014-03-25 16:17:25.354042 7fa5c4bfb700 5 mon.ceph0@0(electing).elector(35) handle_propose from mon.2
2014-03-25 16:17:29.325107 7fa5c53fc700 5 mon.ceph0@0(electing).elector(35) election timer expired
ceph1:
2014-03-25 16:17:24.325529 7ffe48cc1700 5 mon.ceph1@1(electing).elector(35) handle_propose from mon.0
2014-03-25 16:17:24.325535 7ffe48cc1700 5 mon.ceph1@1(electing).elector(35) defer to 0
2014-03-25 16:17:24.325546 7ffe48cc1700 1 -- 10.10.30.1:6789/0 --> mon.0 10.10.30.0:6789/0 -- election(b3f38955-4321-4850-9ddb-3b09940dc951 ack 35) v4 -- ?+0 0x1bbfb40
2014-03-25 16:17:25.354038 7ffe48cc1700 1 -- 10.10.30.1:6789/0 <== mon.2 10.10.30.2:6789/0 489 ==== election(b3f38955-4321-4850-9ddb-3b09940dc951 propose 35) v4 ==== 537+0+0 (4036841703 0 0) 0x1bbf6c0 con 0x14d9b00
2014-03-25 16:17:25.354102 7ffe48cc1700 5 mon.ceph1@1(electing).elector(35) handle_propose from mon.2
2014-03-25 16:17:25.354113 7ffe48cc1700 5 mon.ceph1@1(electing).elector(35) no, we already acked 0
ceph2:
2014-03-25 16:17:20.353135 7f80d0013700 5 mon.ceph2@2(electing).elector(35) election timer expired
2014-03-25 16:17:20.353154 7f80d0013700 5 mon.ceph2@2(electing).elector(35) start -- can i be leader?
2014-03-25 16:17:20.353225 7f80d0013700 1 mon.ceph2@2(electing).elector(35) init, last seen epoch 35
2014-03-25 16:17:20.353238 7f80d0013700 1 -- 10.10.30.2:6789/0 --> mon.0 10.10.30.0:6789/0 -- election(b3f38955-4321-4850-9ddb-3b09940dc951 propose 35) v4 -- ?+0 0x18e7900
2014-03-25 16:17:20.353272 7f80d0013700 1 -- 10.10.30.2:6789/0 --> mon.1 10.10.30.1:6789/0 -- election(b3f38955-4321-4850-9ddb-3b09940dc951 propose 35) v4 -- ?+0 0x18e7d80
2014-03-25 16:17:25.353559 7f80d0013700 5 mon.ceph2@2(electing).elector(35) election timer expired
2014-03-25 16:17:25.353578 7f80d0013700 5 mon.ceph2@2(electing).elector(35) start -- can i be leader?
2014-03-25 16:17:25.353647 7f80d0013700 1 mon.ceph2@2(electing).elector(35) init, last seen epoch 35
2014-03-25 16:17:25.353660 7f80d0013700 1 -- 10.10.30.2:6789/0 --> mon.0 10.10.30.0:6789/0 -- election(b3f38955-4321-4850-9ddb-3b09940dc951 propose 35) v4 -- ?+0 0x19b7240
2014-03-25 16:17:25.353695 7f80d0013700 1 -- 10.10.30.2:6789/0 --> mon.1 10.10.30.1:6789/0 -- election(b3f38955-4321-4850-9ddb-3b09940dc951 propose 35) v4 -- ?+0 0x19b76c0
2014-03-25 16:17:30.354040 7f80d0013700 5 mon.ceph2@2(electing).elector(35) election timer expired
Oddly, it looks to me like mon.2 (ceph2) never handles/receives the proposal from mon.0 (ceph0). But I admit I have no clue how monitor election works.
- Travis
On Tue, Mar 25, 2014 at 12:04 PM, Travis Rhoden < trhoden@xxxxxxxxx > wrote:
I bumped debug mon and debug ms up on one of the monitors (ceph0), and this is what I see:
2014-03-25 16:02:19.273406 7fa5c53fc700 5 mon.ceph0@0(electing).elector(35) election timer expired
2014-03-25 16:02:19.273447 7fa5c53fc700 5 mon.ceph0@0(electing).elector(35) start -- can i be leader?
2014-03-25 16:02:19.273528 7fa5c53fc700 1 mon.ceph0@0(electing).elector(35) init, last seen epoch 35
2014-03-25 16:02:19.273543 7fa5c53fc700 1 -- 10.10.30.0:6789/0 --> mon.1 10.10.30.1:6789/0 -- election(b3f38955-4321-4850-9ddb-3b09940dc951 propose 35) v4 -- ?+0 0x251bd80
2014-03-25 16:02:19.273569 7fa5c53fc700 1 -- 10.10.30.0:6789/0 --> mon.2 10.10.30.2:6789/0 -- election(b3f38955-4321-4850-9ddb-3b09940dc951 propose 35) v4 -- ?+0 0x251bb40
2014-03-25 16:02:20.284459 7fa5c4bfb700 1 -- 10.10.30.0:6789/0 <== mon.2 10.10.30.2:6789/0 312 ==== election(b3f38955-4321-4850-9ddb-3b09940dc951 propose 35) v4 ==== 537+0+0 (4036841703 0 0) 0x2515480 con 0x1df0c60
2014-03-25 16:02:20.284524 7fa5c4bfb700 5 mon.ceph0@0(electing).elector(35) handle_propose from mon.2
2014-03-25 16:02:24.273726 7fa5c53fc700 5 mon.ceph0@0(electing).elector(35) election timer expired
That just repeats...
On Tue, Mar 25, 2014 at 11:48 AM, Travis Rhoden < trhoden@xxxxxxxxx > wrote:
<blockquote>
Just to emphasize that I don't think it's clock skew, here is the NTP state of all three monitors:
# ansible ceph_mons -m command -a "ntpq -p" -kK
SSH password:
sudo password [defaults to SSH password]:
ceph0 | success | rc=0 >>
remote refid st t when poll reach delay offset jitter
==============================================================================
*controller-10g 198.60.73.8 2 u 43 64 377 0.236 0.057 0.097
ceph1 | success | rc=0 >>
remote refid st t when poll reach delay offset jitter
==============================================================================
*controller-10g 198.60.73.8 2 u 39 64 377 0.273 0.035 0.064
ceph2 | success | rc=0 >>
remote refid st t when poll reach delay offset jitter
==============================================================================
*controller-10g 198.60.73.8 2 u 30 64 377 0.201 -0.063 0.063
I think they are pretty well in synch.
- Travis
On Tue, Mar 25, 2014 at 11:09 AM, Travis Rhoden < trhoden@xxxxxxxxx > wrote:
</blockquote>
Hello,
I just deployed a new Emperor cluster using ceph-deploy 1.4. All went very smooth, until I rebooted all the nodes. After reboot, the monitors no longer form a quorum.
I followed the troubleshooting steps here: http://ceph.com/docs/master/rados/troubleshooting/troubleshooting-mon/
Specifically, I"m in the stat described in this section: http://ceph.com/docs/master/rados/troubleshooting/troubleshooting-mon/#most-common-monitor-issues
The state for all the monitors is "electing". The docs say this is most likely clock skew, but I do have all nodes synch'd with NTP. I've confirmed this multiple times. I've also confirmed the monitors can reach each other (by telneting to IP:PORT, and I can see established connections via netstat).
I'm baffled.
here is a sample mon_status output:
root@ceph0:~# ceph daemon mon.ceph0 quorum_status
{ "election_epoch": 31,
"quorum": [],
"quorum_names": [],
"quorum_leader_name": "",
"monmap": { "epoch": 2,
"fsid": "XXX", (redacted)
"modified": "2014-03-24 14:35:22.332646",
"created": "0.000000",
"mons": [
{ "rank": 0,
"name": "ceph0",
"addr": " 10.10.30.0:6789 \/0"},
{ "rank": 1,
"name": "ceph1",
"addr": " 10.10.30.1:6789 \/0"},
{ "rank": 2,
"name": "ceph2",
"addr": " 10.10.30.2:6789 \/0"}]}}
They all look identical to that.
Any ideas what I can look at besides NTP? The docs really stress that it should be clock skew, so I'll keep looking at that...
- Travis
</blockquote>
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