Re: NVME hosts added to the clusters and it made old ssd hosts flapping osds

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Yes, you are right guys, the networking will be the issue in the private network with Jumbo, I can’t ping on the cluster network each other with Jumbo packets (not even simple 1462 …).Thank you guys.

Istvan Szabo
Senior Infrastructure Engineer
---------------------------------------------------
Agoda Services Co., Ltd.
e: istvan.szabo@xxxxxxxxx<mailto:istvan.szabo@xxxxxxxxx>
---------------------------------------------------

On 2021. Jul 8., at 22:18, Anthony D'Atri <anthony.datri@xxxxxxxxx> wrote:

If you’re using a replication / private network, ensure that the old and new hosts can reach each other over it.

If you’re using jumbo frames, ensure that the old and new nodes / switches are all configured appropriately.

On Jul 8, 2021, at 4:17 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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