Re: cluster is not stable

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After checking the network and syslog/dmsg, I think it's not the network or hardware issue. Now there're some 
osds being marked down every 15 minutes.

here is ceph.log:
2019-03-13 11:06:26.290701 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6756 : cluster [INF] Cluster is now healthy
2019-03-13 11:21:21.705787 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6757 : cluster [INF] osd.1 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.705858 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6758 : cluster [INF] osd.2 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.705920 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6759 : cluster [INF] osd.4 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.705957 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6760 : cluster [INF] osd.6 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.705999 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6761 : cluster [INF] osd.7 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706040 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6762 : cluster [INF] osd.10 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706079 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6763 : cluster [INF] osd.11 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706118 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6764 : cluster [INF] osd.12 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706155 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6765 : cluster [INF] osd.13 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706195 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6766 : cluster [INF] osd.14 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706233 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6767 : cluster [INF] osd.15 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706273 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6768 : cluster [INF] osd.16 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706312 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6769 : cluster [INF] osd.17 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706351 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6770 : cluster [INF] osd.18 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706385 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6771 : cluster [INF] osd.19 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706423 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6772 : cluster [INF] osd.20 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706503 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6773 : cluster [INF] osd.22 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706549 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6774 : cluster [INF] osd.23 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706587 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6775 : cluster [INF] osd.25 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706625 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6776 : cluster [INF] osd.26 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706665 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6777 : cluster [INF] osd.27 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706703 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6778 : cluster [INF] osd.28 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706741 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6779 : cluster [INF] osd.30 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706779 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6780 : cluster [INF] osd.31 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706817 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6781 : cluster [INF] osd.33 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706856 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6782 : cluster [INF] osd.34 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706894 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6783 : cluster [INF] osd.36 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706930 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6784 : cluster [INF] osd.38 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.706974 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6785 : cluster [INF] osd.40 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.707013 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6786 : cluster [INF] osd.41 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.707051 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6787 : cluster [INF] osd.42 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.707090 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6788 : cluster [INF] osd.44 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.707128 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6789 : cluster [INF] osd.45 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.707166 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6790 : cluster [INF] osd.46 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.707204 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6791 : cluster [INF] osd.48 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.707242 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6792 : cluster [INF] osd.49 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.707279 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6793 : cluster [INF] osd.50 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.707317 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6794 : cluster [INF] osd.51 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.707357 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6795 : cluster [INF] osd.53 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.707396 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6796 : cluster [INF] osd.54 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.707435 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6797 : cluster [INF] osd.56 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.707488 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6798 : cluster [INF] osd.59 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.707533 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6799 : cluster [INF] osd.61 marked down after no beacon for 900.067020 seconds
2019-03-13 11:21:21.711989 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6800 : cluster [WRN] Health check failed: 43 osds down (OSD_DOWN)
2019-03-13 11:21:21.843542 osd.15 osd.15 10.39.0.35:6808/541558 157 : cluster [WRN] Monitor daemon marked osd.15 down, but it is still running
2019-03-13 11:21:21.711989 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6800 : cluster [WRN] Health check failed: 43 osds down (OSD_DOWN)
2019-03-13 11:21:21.843542 osd.15 osd.15 10.39.0.35:6808/541558 157 : cluster [WRN] Monitor daemon marked osd.15 down, but it is still running
2019-03-13 11:21:22.723955 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6802 : cluster [INF] osd.15 10.39.0.35:6808/541558 boot
2019-03-13 11:21:22.724094 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6803 : cluster [INF] osd.51 10.39.0.39:6802/561995 boot
2019-03-13 11:21:22.724177 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6804 : cluster [INF] osd.45 10.39.0.39:6800/561324 boot
2019-03-13 11:21:22.724220 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6805 : cluster [INF] osd.1 10.39.0.34:6801/546469 boot
2019-03-13 11:21:22.724260 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6806 : cluster [INF] osd.17 10.39.0.35:6806/541774 boot
2019-03-13 11:21:22.724300 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6807 : cluster [INF] osd.50 10.39.0.39:6828/561887 boot
2019-03-13 11:21:22.724348 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6808 : cluster [INF] osd.25 10.39.0.36:6804/548005 boot
2019-03-13 11:21:22.724392 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6809 : cluster [INF] osd.13 10.39.0.35:6800/541337 boot
2019-03-13 11:21:22.724438 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6810 : cluster [INF] osd.59 10.39.0.40:6807/570951 boot
2019-03-13 11:21:22.724511 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6811 : cluster [INF] osd.53 10.39.0.39:6816/562213 boot
2019-03-13 11:21:22.724555 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6812 : cluster [INF] osd.19 10.39.0.36:6802/547356 boot
2019-03-13 11:21:22.724597 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6813 : cluster [INF] osd.26 10.39.0.36:6816/548112 boot
2019-03-13 11:21:22.724647 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6814 : cluster [INF] osd.27 10.39.0.37:6803/547560 boot
2019-03-13 11:21:22.724688 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6815 : cluster [INF] osd.2 10.39.0.34:6808/546587 boot
2019-03-13 11:21:22.724742 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6816 : cluster [INF] osd.7 10.39.0.34:6802/547173 boot
2019-03-13 11:21:22.724787 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6817 : cluster [INF] osd.40 10.39.0.38:6805/552745 boot
2019-03-13 11:21:22.724839 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6818 : cluster [INF] osd.36 10.39.0.38:6814/552289 boot
2019-03-13 11:21:22.724890 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6819 : cluster [INF] osd.54 10.39.0.40:6802/570399 boot
2019-03-13 11:21:22.724941 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6820 : cluster [INF] osd.46 10.39.0.39:6807/561444 boot
2019-03-13 11:21:22.724989 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6821 : cluster [INF] osd.28 10.39.0.37:6808/547680 boot
2019-03-13 11:21:22.725075 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6822 : cluster [INF] osd.41 10.39.0.38:6802/552890 boot
2019-03-13 11:21:22.725121 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6823 : cluster [INF] osd.20 10.39.0.36:6812/547465 boot
2019-03-13 11:21:22.725160 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6824 : cluster [INF] osd.42 10.39.0.38:6832/553002 boot
2019-03-13 11:21:22.725203 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6825 : cluster [INF] osd.61 10.39.0.40:6801/571166 boot
2019-03-13 11:21:22.725257 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6826 : cluster [INF] osd.18 10.39.0.36:6805/547240 boot
2019-03-13 11:21:22.725299 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6827 : cluster [INF] osd.22 10.39.0.36:6800/547682 boot
2019-03-13 11:21:22.725362 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6828 : cluster [INF] osd.49 10.39.0.39:6805/561776 boot
2019-03-13 11:21:22.725412 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6829 : cluster [INF] osd.12 10.39.0.35:6802/541229 boot
2019-03-13 11:21:22.725484 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6830 : cluster [INF] osd.34 10.39.0.37:6802/548338 boot
2019-03-13 11:21:22.725560 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6831 : cluster [INF] osd.23 10.39.0.36:6810/547790 boot
2019-03-13 11:21:22.725609 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6832 : cluster [INF] osd.16 10.39.0.35:6801/541666 boot
2019-03-13 11:21:22.725662 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6833 : cluster [INF] osd.56 10.39.0.40:6829/570623 boot
2019-03-13 11:21:22.725753 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6834 : cluster [INF] osd.48 10.39.0.39:6806/561666 boot
2019-03-13 11:21:22.725818 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6835 : cluster [INF] osd.33 10.39.0.37:6810/548230 boot
2019-03-13 11:21:22.725868 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6836 : cluster [INF] osd.30 10.39.0.37:6829/547901 boot
2019-03-13 11:21:22.725976 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6837 : cluster [INF] osd.6 10.39.0.34:6805/547049 boot
2019-03-13 11:21:22.726022 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6838 : cluster [INF] osd.4 10.39.0.34:6822/546816 boot
2019-03-13 11:21:21.849960 osd.10 osd.10 10.39.0.35:6824/540996 155 : cluster [WRN] Monitor daemon marked osd.10 down, but it is still running
2019-03-13 11:21:21.853594 osd.1 osd.1 10.39.0.34:6801/546469 165 : cluster [WRN] Monitor daemon marked osd.1 down, but it is still running
2019-03-13 11:21:21.862261 osd.53 osd.53 10.39.0.39:6816/562213 153 : cluster [WRN] Monitor daemon marked osd.53 down, but it is still running
2019-03-13 11:21:21.863580 osd.50 osd.50 10.39.0.39:6828/561887 155 : cluster [WRN] Monitor daemon marked osd.50 down, but it is still running
2019-03-13 11:21:22.765514 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6840 : cluster [WRN] Health check failed: Reduced data availability: 38 pgs inactive, 78 pgs peering (PG_AVAILABILITY)
2019-03-13 11:21:22.765574 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6841 : cluster [WRN] Health check failed: too few PGs per OSD (28 < min 30) (TOO_FEW_PGS)
2019-03-13 11:21:23.726065 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6842 : cluster [INF] Health check cleared: OSD_DOWN (was: 6 osds down)
2019-03-13 11:21:23.729961 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6843 : cluster [INF] osd.11 10.39.0.35:6805/541106 boot
2019-03-13 11:21:23.731669 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6844 : cluster [INF] osd.10 10.39.0.35:6824/540996 boot
2019-03-13 11:21:23.731789 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6845 : cluster [INF] osd.14 10.39.0.35:6804/541448 boot
2019-03-13 11:21:23.731859 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6846 : cluster [INF] osd.44 10.39.0.38:6800/553222 boot
2019-03-13 11:21:23.731926 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6847 : cluster [INF] osd.31 10.39.0.37:6807/548009 boot
2019-03-13 11:21:23.731975 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6848 : cluster [INF] osd.38 10.39.0.38:6801/552512 boot
2019-03-13 11:21:21.842413 osd.12 osd.12 10.39.0.35:6802/541229 157 : cluster [WRN] Monitor daemon marked osd.12 down, but it is still running
2019-03-13 11:21:21.851780 osd.7 osd.7 10.39.0.34:6802/547173 157 : cluster [WRN] Monitor daemon marked osd.7 down, but it is still running
2019-03-13 11:21:21.852501 osd.4 osd.4 10.39.0.34:6822/546816 163 : cluster [WRN] Monitor daemon marked osd.4 down, but it is still running
2019-03-13 11:21:21.853408 osd.19 osd.19 10.39.0.36:6802/547356 155 : cluster [WRN] Monitor daemon marked osd.19 down, but it is still running
2019-03-13 11:21:21.860298 osd.25 osd.25 10.39.0.36:6804/548005 155 : cluster [WRN] Monitor daemon marked osd.25 down, but it is still running
2019-03-13 11:21:21.860945 osd.44 osd.44 10.39.0.38:6800/553222 155 : cluster [WRN] Monitor daemon marked osd.44 down, but it is still running
2019-03-13 11:21:21.844427 osd.11 osd.11 10.39.0.35:6805/541106 159 : cluster [WRN] Monitor daemon marked osd.11 down, but it is still running
2019-03-13 11:21:21.848239 osd.56 osd.56 10.39.0.40:6829/570623 161 : cluster [WRN] Monitor daemon marked osd.56 down, but it is still running
2019-03-13 11:21:21.854657 osd.59 osd.59 10.39.0.40:6807/570951 151 : cluster [WRN] Monitor daemon marked osd.59 down, but it is still running
2019-03-13 11:21:24.772150 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6851 : cluster [WRN] Health check failed: Degraded data redundancy: 420/332661 objects degraded (0.126%), 1 pg degraded (PG_DEGRADED)
2019-03-13 11:21:21.840603 osd.30 osd.30 10.39.0.37:6829/547901 169 : cluster [WRN] Monitor daemon marked osd.30 down, but it is still running
2019-03-13 11:21:21.850658 osd.16 osd.16 10.39.0.35:6801/541666 161 : cluster [WRN] Monitor daemon marked osd.16 down, but it is still running
2019-03-13 11:21:21.852257 osd.40 osd.40 10.39.0.38:6805/552745 157 : cluster [WRN] Monitor daemon marked osd.40 down, but it is still running
2019-03-13 11:21:21.854963 osd.48 osd.48 10.39.0.39:6806/561666 145 : cluster [WRN] Monitor daemon marked osd.48 down, but it is still running
2019-03-13 11:21:21.861335 osd.42 osd.42 10.39.0.38:6832/553002 151 : cluster [WRN] Monitor daemon marked osd.42 down, but it is still running
2019-03-13 11:21:21.861593 osd.22 osd.22 10.39.0.36:6800/547682 159 : cluster [WRN] Monitor daemon marked osd.22 down, but it is still running
2019-03-13 11:21:21.845502 osd.54 osd.54 10.39.0.40:6802/570399 147 : cluster [WRN] Monitor daemon marked osd.54 down, but it is still running
2019-03-13 11:21:21.848701 osd.14 osd.14 10.39.0.35:6804/541448 159 : cluster [WRN] Monitor daemon marked osd.14 down, but it is still running
2019-03-13 11:21:21.854024 osd.51 osd.51 10.39.0.39:6802/561995 157 : cluster [WRN] Monitor daemon marked osd.51 down, but it is still running
2019-03-13 11:21:21.858817 osd.26 osd.26 10.39.0.36:6816/548112 165 : cluster [WRN] Monitor daemon marked osd.26 down, but it is still running
2019-03-13 11:21:21.859382 osd.6 osd.6 10.39.0.34:6805/547049 161 : cluster [WRN] Monitor daemon marked osd.6 down, but it is still running
2019-03-13 11:21:21.862837 osd.45 osd.45 10.39.0.39:6800/561324 145 : cluster [WRN] Monitor daemon marked osd.45 down, but it is still running
2019-03-13 11:21:21.871469 osd.13 osd.13 10.39.0.35:6800/541337 157 : cluster [WRN] Monitor daemon marked osd.13 down, but it is still running
2019-03-13 11:21:21.841995 osd.33 osd.33 10.39.0.37:6810/548230 165 : cluster [WRN] Monitor daemon marked osd.33 down, but it is still running
2019-03-13 11:21:21.848627 osd.28 osd.28 10.39.0.37:6808/547680 157 : cluster [WRN] Monitor daemon marked osd.28 down, but it is still running
2019-03-13 11:21:21.860501 osd.20 osd.20 10.39.0.36:6812/547465 159 : cluster [WRN] Monitor daemon marked osd.20 down, but it is still running
2019-03-13 11:21:22.050876 osd.23 osd.23 10.39.0.36:6810/547790 161 : cluster [WRN] Monitor daemon marked osd.23 down, but it is still running
2019-03-13 11:21:21.853694 osd.38 osd.38 10.39.0.38:6801/552512 153 : cluster [WRN] Monitor daemon marked osd.38 down, but it is still running
2019-03-13 11:21:21.863745 osd.49 osd.49 10.39.0.39:6805/561776 153 : cluster [WRN] Monitor daemon marked osd.49 down, but it is still running
2019-03-13 11:21:28.784280 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6852 : cluster [WRN] Health check update: Reduced data availability: 38 pgs peering (PG_AVAILABILITY)
2019-03-13 11:21:28.784332 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6853 : cluster [INF] Health check cleared: PG_DEGRADED (was: Degraded data redundancy: 420/332661 objects degraded (0.126%), 1 pg degraded)
2019-03-13 11:21:28.784372 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6854 : cluster [INF] Health check cleared: TOO_FEW_PGS (was: too few PGs per OSD (28 < min 30))
2019-03-13 11:21:21.839907 osd.27 osd.27 10.39.0.37:6803/547560 151 : cluster [WRN] Monitor daemon marked osd.27 down, but it is still running
2019-03-13 11:21:21.840611 osd.31 osd.31 10.39.0.37:6807/548009 151 : cluster [WRN] Monitor daemon marked osd.31 down, but it is still running
2019-03-13 11:21:21.842664 osd.17 osd.17 10.39.0.35:6806/541774 157 : cluster [WRN] Monitor daemon marked osd.17 down, but it is still running
2019-03-13 11:21:21.846408 osd.61 osd.61 10.39.0.40:6801/571166 159 : cluster [WRN] Monitor daemon marked osd.61 down, but it is still running
2019-03-13 11:21:21.859087 osd.2 osd.2 10.39.0.34:6808/546587 157 : cluster [WRN] Monitor daemon marked osd.2 down, but it is still running
2019-03-13 11:21:21.861856 osd.46 osd.46 10.39.0.39:6807/561444 155 : cluster [WRN] Monitor daemon marked osd.46 down, but it is still running
2019-03-13 11:21:21.843770 osd.34 osd.34 10.39.0.37:6802/548338 151 : cluster [WRN] Monitor daemon marked osd.34 down, but it is still running
2019-03-13 11:21:21.845353 osd.18 osd.18 10.39.0.36:6805/547240 165 : cluster [WRN] Monitor daemon marked osd.18 down, but it is still running
2019-03-13 11:21:21.860607 osd.41 osd.41 10.39.0.38:6802/552890 157 : cluster [WRN] Monitor daemon marked osd.41 down, but it is still running
2019-03-13 11:21:21.861365 osd.36 osd.36 10.39.0.38:6814/552289 159 : cluster [WRN] Monitor daemon marked osd.36 down, but it is still running
2019-03-13 11:21:30.790492 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6855 : cluster [INF] Health check cleared: PG_AVAILABILITY (was: Reduced data availability: 38 pgs peering)
2019-03-13 11:21:30.790549 mon.ceph-mon1 mon.0 10.39.0.34:6789/0 6856 : cluster [INF] Cluster is now healthy


and the ceph-osd.2.log:
2019-03-13 11:21:21.857 7fd39aefc700  0 log_channel(cluster) log [WRN] : Monitor daemon marked osd.2 down, but it is still running
2019-03-13 11:21:21.857 7fd39aefc700  0 log_channel(cluster) log [DBG] : map e13907 wrongly marked me down at e13907
2019-03-13 11:21:21.857 7fd39aefc700  1 osd.2 13907 start_waiting_for_healthy
.....
2019-03-13 11:21:21.865 7fd39aefc700  1 osd.2 13907 is_healthy false -- only 0/10 up peers (less than 33%)
2019-03-13 11:21:21.865 7fd39aefc700  1 osd.2 13907 not healthy; waiting to boot
.....
2019-03-13 11:21:22.293 7fd3a8f18700  1 osd.2 13907 start_boot
2019-03-13 11:21:22.725 7fd39aefc700  1 osd.2 13908 state: booting -> active




Zhenshi Zhou <deaderzzs@xxxxxxxxx> 于2019年3月12日周二 下午6:08写道：
Hi Kevin,

I'm sure the firewalld are disabled on each host.

Well, the network is not a problem. The servers are connected 
to the same switch and the connection is good when the osds 
are marked as down. There was no interruption or delay.

I restart the leader monitor daemon and it seems return to the 
normal state. 

Thanks.

Kevin Olbrich <ko@xxxxxxx> 于2019年3月12日周二 下午5:44写道：
Are you sure that firewalld is stopped and disabled?
Looks exactly like that when I missed one host in a test cluster.

Kevin


Am Di., 12. März 2019 um 09:31 Uhr schrieb Zhenshi Zhou <deaderzzs@xxxxxxxxx>:
Hi,

I deployed a ceph cluster with good performance. But the logs 
indicate that the cluster is not as stable as I think it should be.

The log shows the monitors mark some osd as down periodly:
image.png

I didn't find any useful information in osd logs.

ceph version 13.2.4 mimic (stable)
OS version CentOS 7.6.1810
kernel version 5.0.0-2.el7

Thanks.
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