some monitors have existed for many years (weight 10) others have been added (weight 0) => https://github.com/ceph/ceph/commit/2d113dedf851995e000d3cce136b69 bfa94b6fe0 Le jeudi 7 mars 2024, Eugen Block <eblock@nde.ag> a écrit :
I’m curious how the weights might have been changed. I’ve never touched a mon weight myself, do you know how that happened?
Zitat von "David C." <david.casier@aevoo.fr>:
Ok, got it :
[root@pprod-admin:/var/lib/ceph/<UUID>]# ceph mon dump -f json-pretty |egrep "name|weigh" dumped monmap epoch 14 "min_mon_release_name": "quincy", "name": "pprod-mon2", "weight": 10, "name": "pprod-mon3", "weight": 10, "name": "pprod-osd2", "weight": 0, "name": "pprod-osd1", "weight": 0, "name": "pprod-osd3", "weight": 0,
ceph mon set-weight pprod-mon2 0 ceph mon set-weight pprod-mon3 0
And restart ceph-mgr
Le jeu. 7 mars 2024 à 18:25, David C. <david.casier@aevoo.fr> a écrit :
I took the wrong ligne =>
https://github.com/ceph/ceph/blob/v17.2.6/src/mon/MonClient.cc#L822
Le jeu. 7 mars 2024 à 18:21, David C. <david.casier@aevoo.fr> a écrit :
Hello everybody,
I'm encountering strange behavior on an infrastructure (it's pre-production but it's very ugly). After a "drain" on monitor (and a manager). MGRs all crash on startup:
Mar 07 17:06:47 pprod-mon1 ceph-mgr[564045]: mgr ms_dispatch2 standby mgrmap(e 1310) v1 Mar 07 17:06:47 pprod-mon1 ceph-mgr[564045]: mgr handle_mgr_map received map epoch 1310 Mar 07 17:06:47 pprod-mon1 ceph-mgr[564045]: mgr handle_mgr_map active in map: 1 active is 99148504 Mar 07 17:06:47 pprod-mon1 ceph-mgr[564045]: mgr handle_mgr_map Activating! Mar 07 17:06:47 pprod-mon1 ceph-mgr[564045]: mgr handle_mgr_map I am now activating Mar 07 17:06:47 pprod-mon1 ceph-mgr[564045]: mgr ms_dispatch2 mgrmap(e 1310) v1 Mar 07 17:06:47 pprod-mon1 ceph-mgr[564045]: mgrc handle_mgr_map Got map version 1310 Mar 07 17:06:47 pprod-mon1 ceph-mgr[564045]: mgrc handle_mgr_map Active mgr is now Mar 07 17:06:47 pprod-mon1 ceph-mgr[564045]: mgrc reconnect No active mgr available yet Mar 07 17:06:47 pprod-mon1 ceph-mgr[564045]: mgr init waiting for OSDMap... Mar 07 17:06:47 pprod-mon1 ceph-mgr[564045]: monclient: _renew_subs Mar 07 17:06:47 pprod-mon1 ceph-mgr[564045]: monclient: _send_mon_message to mon.idf-pprod-osd3 at v2:X.X.X.X:3300/0 <http://10.191.10.3:3300/0> Mar 07 17:06:47 pprod-mon1 ceph-mgr[564045]: monclient: _reopen_session rank -1 Mar 07 17:06:47 pprod-mon1 ceph-mgr[564045]: *** Caught signal (Aborted) ** in thread 7f9a07a27640 thread_name:mgr-fin
ceph version 17.2.6-170.el9cp (59bbeb8815ec3aeb3c8bba1e1866f8f6729eb840) quincy (stable) 1: /lib64/libc.so.6(+0x54db0) [0x7f9a2364ddb0] 2: /lib64/libc.so.6(+0xa154c) [0x7f9a2369a54c] 3: raise() 4: abort() 5: /usr/lib64/ceph/libceph-common.so.2(+0x1c1fa8) [0x7f9a23ce2fa8] 6: /usr/lib64/ceph/libceph-common.so.2(+0x444425) [0x7f9a23f65425] 7: /usr/lib64/ceph/libceph-common.so.2(+0x4442e0) [0x7f9a23f652e0] 8: /usr/lib64/ceph/libceph-common.so.2(+0x4442e0) [0x7f9a23f652e0] 9: (MonClient::_add_conns()+0x242) [0x7f9a23f5fa42] 10: (MonClient::_reopen_session(int)+0x428) [0x7f9a23f60518] 11: (Mgr::init()+0x384) [0x5604667a6434] 12: /usr/bin/ceph-mgr(+0x1af271) [0x5604667ae271] 13: /usr/bin/ceph-mgr(+0x11364d) [0x56046671264d] 14: (Finisher::finisher_thread_entry()+0x175) [0x7f9a23d10645] 15: /lib64/libc.so.6(+0x9f802) [0x7f9a23698802] 16: /lib64/libc.so.6(+0x3f450) [0x7f9a23638450] NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.
I have the impression that the MGRs are ejected by the monitors, however after debugging monitor, I don't see anything abnormal on the monitor side (if I haven't missed something).
All we can see is that we get an exception on the "_add_conn" method ( https://github.com/ceph/ceph/blob/v17.2.6/src/mon/MonClient.cc #L775)
Version : 17.2.6-170.el9cp (RHCS6)
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