Have you confirmed that all OSD hosts can see each other (on both the front
and back networks if you use split networks)? If there's not full
connectivity, then that can lead to the issues you see here.
Checking the logs on the mons can be helpful, as it will usually indicate
why a given OSD is being marked down (e.g. which OSDs are indicating that
it's down). The OSD logs may also be helpful.
Josh
On Thu, Jul 8, 2021 at 5:18 AM Szabo, Istvan (Agoda) <Istvan.Szabo@xxxxxxxxx>
wrote:
> Hi,
>
> I've added 4 nvme hosts with 2osd/nvme to my cluster and it made al the
> ssd osds flapping I don't understand why.
> It is under the same root but 2 different device classes, nvme and ssd.
> The pools are on the ssd on the nvme nothing at the moment.
> The only way to bring back the ssd osds alive to shutdown the nvmes.
> The new nvme servers have 25GB nics the old servers and the mons have 10GB
> but in aggregated mode.
>
> This is the crush rule dump:
> [
> {
> "rule_id": 0,
> "rule_name": "replicated_ssd",
> "ruleset": 0,
> "type": 1,
> "min_size": 1,
> "max_size": 10,
> "steps": [
> {
> "op": "take",
> "item": -21,
> "item_name": "default~ssd"
> },
> {
> "op": "chooseleaf_firstn",
> "num": 0,
> "type": "host"
> },
> {
> "op": "emit"
> }
> ]
> },
> {
> "rule_id": 1,
> "rule_name": "replicated_nvme",
> "ruleset": 1,
> "type": 1,
> "min_size": 1,
> "max_size": 10,
> "steps": [
> {
> "op": "take",
> "item": -10,
> "item_name": "default~nvme"
> },
> {
> "op": "chooseleaf_firstn",
> "num": 0,
> "type": "host"
> },
> {
> "op": "emit"
> }
> ]
> }
> ]
>
>
> This is the osd tree
>
> ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
> -19 561.15057 root default
> -1 38.03099 host server-2001
> 0 ssd 2.00000 osd.0 up 1.00000 1.00000
> 10 ssd 6.98499 osd.10 up 1.00000 1.00000
> 11 ssd 6.98599 osd.11 up 1.00000 1.00000
> 12 ssd 2.29799 osd.12 up 1.00000 1.00000
> 13 ssd 2.29799 osd.13 up 1.00000 1.00000
> 14 ssd 3.49300 osd.14 up 1.00000 1.00000
> 41 ssd 6.98499 osd.41 up 1.00000 1.00000
> 42 ssd 6.98599 osd.42 up 1.00000 1.00000
> -3 38.03099 host server-2002
> 1 ssd 2.00000 osd.1 up 1.00000 1.00000
> 24 ssd 6.98499 osd.24 up 1.00000 1.00000
> 25 ssd 6.98599 osd.25 up 1.00000 1.00000
> 27 ssd 2.29799 osd.27 up 1.00000 1.00000
> 28 ssd 2.29799 osd.28 up 1.00000 1.00000
> 29 ssd 3.49300 osd.29 up 1.00000 1.00000
> 43 ssd 6.98499 osd.43 up 1.00000 1.00000
> 44 ssd 6.98599 osd.44 up 1.00000 1.00000
> -6 38.03000 host server-2003
> 2 ssd 2.00000 osd.2 up 1.00000 1.00000
> 26 ssd 6.98499 osd.26 up 1.00000 1.00000
> 38 ssd 2.29999 osd.38 up 1.00000 1.00000
> 39 ssd 2.29500 osd.39 up 1.00000 1.00000
> 40 ssd 3.49300 osd.40 up 1.00000 1.00000
> 45 ssd 6.98499 osd.45 up 1.00000 1.00000
> 46 ssd 6.98599 osd.46 up 1.00000 1.00000
> 47 ssd 6.98599 osd.47 up 1.00000 1.00000
> -17 111.76465 host server-2004
> 5 nvme 6.98529 osd.5 down 0 1.00000
> 9 nvme 6.98529 osd.9 down 0 1.00000
> 18 nvme 6.98529 osd.18 down 0 1.00000
> 22 nvme 6.98529 osd.22 down 0 1.00000
> 32 nvme 6.98529 osd.32 down 0 1.00000
> 36 nvme 6.98529 osd.36 down 0 1.00000
> 50 nvme 6.98529 osd.50 down 0 1.00000
> 54 nvme 6.98529 osd.54 down 0 1.00000
> 58 nvme 6.98529 osd.58 down 0 1.00000
> 62 nvme 6.98529 osd.62 down 0 1.00000
> 66 nvme 6.98529 osd.66 down 0 1.00000
> 70 nvme 6.98529 osd.70 down 0 1.00000
> 74 nvme 6.98529 osd.74 down 0 1.00000
> 78 nvme 6.98529 osd.78 down 0 1.00000
> 82 nvme 6.98529 osd.82 down 0 1.00000
> 86 nvme 6.98529 osd.86 down 0 1.00000
> -14 111.76465 host server-2005
> 4 nvme 6.98529 osd.4 down 0 1.00000
> 8 nvme 6.98529 osd.8 down 0 1.00000
> 17 nvme 6.98529 osd.17 down 0 1.00000
> 21 nvme 6.98529 osd.21 down 0 1.00000
> 31 nvme 6.98529 osd.31 down 0 1.00000
> 35 nvme 6.98529 osd.35 down 0 1.00000
> 49 nvme 6.98529 osd.49 down 0 1.00000
> 53 nvme 6.98529 osd.53 down 0 1.00000
> 57 nvme 6.98529 osd.57 down 0 1.00000
> 61 nvme 6.98529 osd.61 down 0 1.00000
> 65 nvme 6.98529 osd.65 down 0 1.00000
> 69 nvme 6.98529 osd.69 down 0 1.00000
> 73 nvme 6.98529 osd.73 down 0 1.00000
> 77 nvme 6.98529 osd.77 down 0 1.00000
> 81 nvme 6.98529 osd.81 down 0 1.00000
> 85 nvme 6.98529 osd.85 down 0 1.00000
> -22 111.76465 host server-2006
> 6 nvme 6.98529 osd.6 down 0 1.00000
> 15 nvme 6.98529 osd.15 down 0 1.00000
> 19 nvme 6.98529 osd.19 down 0 1.00000
> 23 nvme 6.98529 osd.23 down 0 1.00000
> 33 nvme 6.98529 osd.33 down 0 1.00000
> 37 nvme 6.98529 osd.37 down 0 1.00000
> 51 nvme 6.98529 osd.51 down 0 1.00000
> 55 nvme 6.98529 osd.55 down 0 1.00000
> 59 nvme 6.98529 osd.59 down 0 1.00000
> 63 nvme 6.98529 osd.63 up 0 1.00000
> 67 nvme 6.98529 osd.67 down 0 1.00000
> 71 nvme 6.98529 osd.71 up 0 1.00000
> 75 nvme 6.98529 osd.75 down 0 1.00000
> 79 nvme 6.98529 osd.79 down 0 1.00000
> 83 nvme 6.98529 osd.83 down 0 1.00000
> 87 nvme 6.98529 osd.87 down 0 1.00000
> -11 111.76465 host server-2007
> 3 nvme 6.98529 osd.3 down 0 1.00000
> 7 nvme 6.98529 osd.7 down 0 1.00000
> 16 nvme 6.98529 osd.16 down 0 1.00000
> 20 nvme 6.98529 osd.20 down 0 1.00000
> 30 nvme 6.98529 osd.30 down 0 1.00000
> 34 nvme 6.98529 osd.34 down 0 1.00000
> 48 nvme 6.98529 osd.48 down 0 1.00000
> 52 nvme 6.98529 osd.52 down 0 1.00000
> 56 nvme 6.98529 osd.56 down 0 1.00000
> 60 nvme 6.98529 osd.60 down 0 1.00000
> 64 nvme 6.98529 osd.64 down 0 1.00000
> 68 nvme 6.98529 osd.68 down 0 1.00000
> 72 nvme 6.98529 osd.72 down 0 1.00000
> 76 nvme 6.98529 osd.76 down 0 1.00000
> 80 nvme 6.98529 osd.80 down 0 1.00000
> 84 nvme 6.98529 osd.84 down 0 1.00000
>
> Pool info:
> pool 21 'dbs-realtime-staging-client' replicated size 3 min_size 1
> crush_rule 0 object_hash rjenkins pg_num 32 pgp_num 32 autoscale_mode on
> last_change 27611 lfor 0/27512/27510 flags hashpspool,selfmanaged_snaps
> max_bytes 9999757606912 stripe_width 0 application rbd
> pool 24 'dbs-realtime-staging-w-financedb' replicated size 3 min_size 1
> crush_rule 0 object_hash rjenkins pg_num 256 pgp_num 256 autoscale_mode on
> last_change 27613 flags hashpspool,selfmanaged_snaps max_bytes
> 19999515213824 stripe_width 0 application rbd
> pool 25 'dbs-realtime-staging-w-dstest' replicated size 3 min_size 1
> crush_rule 0 object_hash rjenkins pg_num 32 pgp_num 32 autoscale_mode on
> last_change 27813 lfor 0/0/23856 flags hashpspool,selfmanaged_snaps
> max_bytes 99857989632 stripe_width 0 application rbd
>
> Istvan Szabo
> Senior Infrastructure Engineer
> ---------------------------------------------------
> Agoda Services Co., Ltd.
> e: istvan.szabo@xxxxxxxxx<mailto:istvan.szabo@xxxxxxxxx>
> ---------------------------------------------------
>
>
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