[ceph-users] Strange Ceph host behaviour

Steve Taylor steve.taylor at storagecraft.com
Tue Oct 2 09:13:33 PDT 2018


Unless this is related to load and OSDs really are unreponsive, it is
almost certainly some sort of network issue. Duplicate IP address
maybe?


 
Steve Taylor | Senior Software Engineer | StorageCraft Technology Corporation
380 Data Drive Suite 300 | Draper | Utah | 84020
Office: 801.871.2799 | 
 
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On Tue, 2018-10-02 at 17:17 +0200, Vincent Godin wrote:
> Ceph cluster in Jewel 10.2.11
> Mons & Hosts are on CentOS 7.5.1804 kernel 3.10.0-862.6.3.el7.x86_64
> 
> Everyday, we can see in ceph.log on Monitor a lot of logs like these :
> 
> 2018-10-02 16:07:08.882374 osd.478 192.168.1.232:6838/7689 386 :
> cluster [WRN] map e612590 wrongly marked me down
> 2018-10-02 16:07:06.462653 osd.464 192.168.1.232:6830/6650 317 :
> cluster [WRN] map e612588 wrongly marked me down
> 2018-10-02 16:07:10.717673 osd.470 192.168.1.232:6836/7554 371 :
> cluster [WRN] map e612591 wrongly marked me down
> 2018-10-02 16:14:51.179945 osd.414 192.168.1.227:6808/4767 670 :
> cluster [WRN] map e612599 wrongly marked me down
> 2018-10-02 16:14:48.422442 osd.403 192.168.1.227:6832/6727 509 :
> cluster [WRN] map e612597 wrongly marked me down
> 2018-10-02 16:15:13.198180 osd.436 192.168.1.228:6828/6402 533 :
> cluster [WRN] map e612608 wrongly marked me down
> 2018-10-02 16:15:08.792369 osd.433 192.168.1.228:6832/6732 515 :
> cluster [WRN] map e612604 wrongly marked me down
> 2018-10-02 16:15:11.680405 osd.429 192.168.1.228:6838/7393 536 :
> cluster [WRN] map e612607 wrongly marked me down
> 2018-10-02 16:15:14.246717 osd.431 192.168.1.228:6822/5937 474 :
> cluster [WRN] map e612609 wrongly marked me down
> 
> On the server 192.168.1.228 for example, the /var/log/messages looks like :
> 
> Oct  2 16:15:02 bd-ceph-22 ceph-osd: 2018-10-02 16:15:02.935658
> 7f716f16e700 -1 osd.432 612603 heartbeat_check: no reply from
> 192.168.1.215:6815 osd.242 since back 2018-10-02 16:14:59.065582 front
> 2018-10-02 16:14:42.046092 (cutoff 2018-10-02 16:14:42.935642)
> Oct  2 16:15:03 bd-ceph-22 ceph-osd: 2018-10-02 16:15:03.935841
> 7f716f16e700 -1 osd.432 612603 heartbeat_check: no reply from
> 192.168.1.215:6815 osd.242 since back 2018-10-02 16:14:59.065582 front
> 2018-10-02 16:14:42.046092 (cutoff 2018-10-02 16:14:43.935824)
> Oct  2 16:15:04 bd-ceph-22 ceph-osd: 2018-10-02 16:15:04.283822
> 7fe378c13700 -1 osd.426 612603 heartbeat_check: no reply from
> 192.168.1.215:6807 osd.240 since back 2018-10-02 16:15:00.450196 front
> 2018-10-02 16:14:43.433054 (cutoff 2018-10-02 16:14:44.283811)
> Oct  2 16:15:04 bd-ceph-22 ceph-osd: 2018-10-02 16:15:04.353645
> 7f1110a32700 -1 osd.438 612603 heartbeat_check: no reply from
> 192.168.1.212:6807 osd.186 since back 2018-10-02 16:14:59.700105 front
> 2018-10-02 16:14:43.884248 (cutoff 2018-10-02 16:14:44.353612)
> Oct  2 16:15:04 bd-ceph-22 ceph-osd: 2018-10-02 16:15:04.373905
> 7f71375de700 -1 osd.432 612603 heartbeat_check: no reply from
> 192.168.1.215:6815 osd.242 since back 2018-10-02 16:14:59.065582 front
> 2018-10-02 16:14:42.046092 (cutoff 2018-10-02 16:14:44.373897)
> Oct  2 16:15:04 bd-ceph-22 ceph-osd: 2018-10-02 16:15:04.935997
> 7f716f16e700 -1 osd.432 612603 heartbeat_check: no reply from
> 192.168.1.215:6815 osd.242 since back 2018-10-02 16:15:04.369740 front
> 2018-10-02 16:14:42.046092 (cutoff 2018-10-02 16:14:44.935981)
> Oct  2 16:15:05 bd-ceph-22 ceph-osd: 2018-10-02 16:15:05.007484
> 7f10d97ec700 -1 osd.438 612603 heartbeat_check: no reply from
> 192.168.1.212:6807 osd.186 since back 2018-10-02 16:14:59.700105 front
> 2018-10-02 16:14:43.884248 (cutoff 2018-10-02 16:14:45.007477)
> Oct  2 16:15:05 bd-ceph-22 ceph-osd: 2018-10-02 16:15:05.017154
> 7fd4cee4d700 -1 osd.435 612603 heartbeat_check: no reply from
> 192.168.1.212:6833 osd.195 since back 2018-10-02 16:15:03.273909 front
> 2018-10-02 16:14:44.648411 (cutoff 2018-10-02 16:14:45.017106)
> Oct  2 16:15:05 bd-ceph-22 ceph-osd: 2018-10-02 16:15:05.158580
> 7fe343c96700 -1 osd.426 612603 heartbeat_check: no reply from
> 192.168.1.215:6807 osd.240 since back 2018-10-02 16:15:00.450196 front
> 2018-10-02 16:14:43.433054 (cutoff 2018-10-02 16:14:45.158567)
> Oct  2 16:15:05 bd-ceph-22 ceph-osd: 2018-10-02 16:15:05.283983
> 7fe378c13700 -1 osd.426 612603 heartbeat_check: no reply from
> 192.168.1.215:6807 osd.240 since back 2018-10-02 16:15:05.154458 front
> 2018-10-02 16:14:43.433054 (cutoff 2018-10-02 16:14:45.283975)
> 
> There is no network problem at that time (i checked the logs on the
> host and on the switch). OSD logs shows nothing but "wrongly marked me
> down" and sessions reset due to this monitor action. As several OSDs
> are impacted, it looks like a host problem.
> 
> The sysctl.conf is:
> 
> net.core.rmem_max=56623104
> net.core.wmem_max=56623104
> net.core.rmem_default=56623104
> net.core.wmem_default=56623104
> net.core.optmem_max=40960
> net.ipv4.tcp_rmem=4096 87380 56623104
> net.ipv4.tcp_wmem=4096 65536 56623104
> net.core.somaxconn=1024
> net.core.netdev_max_backlog=50000
> net.ipv4.tcp_max_syn_backlog=30000
> net.ipv4.tcp_max_tw_buckets=2000000
> net.ipv4.tcp_tw_reuse=1
> net.ipv4.tcp_fin_timeout=10
> net.ipv4.tcp_slow_start_after_idle=0
> net.ipv4.udp_rmem_min=8192
> net.ipv4.udp_wmem_min=8192
> net.ipv4.conf.all.send_redirects=0
> net.ipv4.conf.all.accept_redirects=0
> net.ipv4.conf.all.accept_source_route=0
> 
> kernel.pid_max=4194303
> fs.file-max=26234859
> 
> Does someone has any idea or has already met this behaviour ?
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