Thank you for your help, while reading your answer, I realize that I
totally misunderstood how cruh map algo and data placement work in CEPH.
I fix my issue, with this new rule :
"rules": [
{
"rule_id": 0,
"rule_name": "replicated_ruleset",
"ruleset": 0,
"type": 1,
"min_size": 1,
"max_size": 10,
"steps": [
{
"op": "take",
"item": -8,
"item_name": "default"
},
{
"op": "choose_firstn",
"num": 0,
"type": "datacenter"
},
{
"op": "chooseleaf_firstn",
"num": 0,
"type": "host"
},
{
"op": "emit"
}
]
}
],
But I don't understand why, in addition, I don't understand why my pg are
split on 2 OSDs (I wish there only on 2 in separate DC) :
root@ceph-osd-1:~# ceph osd map data lun2
osdmap e60 pool 'data' (1) object 'lun2' -> pg 1.b0e4d232 (1.32) -> up
([2,6,0], p2) acting ([2,6,0], p2)
root@ceph-osd-1:~#
Could you explain me why ?
Best,
2015-12-14 21:37 GMT+01:00 Samuel Just <[email protected]>:
> You most likely have pool size set to 3, but your crush rule requires
> replicas to be separated across DCs, of which you have only 2.
> -Sam
>
> On Mon, Dec 14, 2015 at 11:12 AM, Reno Rainz <[email protected]> wrote:
> > Thank you for your answer, but I don't really understand what do you
> mean.
> >
> > I use this map to distribute replicat into 2 differents dc, but I don't
> know
> > where the mistake is.
> >
> > Le 14 déc. 2015 7:56 PM, "Samuel Just" <[email protected]> a écrit :
> >>
> >> 2 datacenters.
> >> -Sam
> >>
> >> On Mon, Dec 14, 2015 at 10:17 AM, Reno Rainz <[email protected]>
> wrote:
> >> > Hi,
> >> >
> >> > I got a functionnal and operationnal ceph cluster (in version
> 0.94.5),
> >> > with
> >> > 3 nodes (acting for MON and OSD), everything was fine.
> >> >
> >> > I added a 4th osd node (same configuration than 3 others) and now
> >> > cluster
> >> > status is health warn (active+remapped).
> >> >
> >> >
> >> > cluster e821c68f-995c-41a9-9c46-dbbd0a28b8c7
> >> > health HEALTH_WARN
> >> > 256 pgs stuck unclean
> >> > recovery 279/1245 objects degraded (22.410%)
> >> > recovery 415/1245 objects misplaced (33.333%)
> >> > pool rbd pg_num 128 > pgp_num 64
> >> > pool data pg_num 128 > pgp_num 100
> >> > monmap e1: 3 mons at
> >> >
> >> > {ceph-osd-1=
> 10.200.1.11:6789/0,ceph-osd-2=10.200.1.12:6789/0,ceph-osd-3=10.200.1.13:6789/0
> }
> >> > election epoch 4, quorum 0,1,2
> >> > ceph-osd-1,ceph-osd-2,ceph-osd-3
> >> > osdmap e57: 8 osds: 8 up, 8 in; 256 remapped pgs
> >> > pgmap v948: 256 pgs, 2 pools, 1566 MB data, 415 objects
> >> > 14929 MB used, 38237 MB / 55717 MB avail
> >> > 279/1245 objects degraded (22.410%)
> >> > 415/1245 objects misplaced (33.333%)
> >> > 256 active+remapped
> >> >
> >> >
> >> > OSD Tree
> >> > root@ceph-osd-1:~# ceph osd tree
> >> > ID WEIGHT TYPE NAME UP/DOWN REWEIGHT
> >> > PRIMARY-AFFINITY
> >> > -8 4.00000 root default
> >> > -7 4.00000 region eu-west-1
> >> > -5 1.00000 datacenter eu-west-1a
> >> > -2 1.00000 host ceph-osd-1
> >> > 0 1.00000 osd.0 up 1.00000
> >> > 1.00000
> >> > 1 1.00000 osd.1 up 1.00000
> >> > 1.00000
> >> > -4 1.00000 host ceph-osd-3
> >> > 4 1.00000 osd.4 up 1.00000
> >> > 1.00000
> >> > 5 1.00000 osd.5 up 1.00000
> >> > 1.00000
> >> > -6 1.00000 datacenter eu-west-1b
> >> > -3 1.00000 host ceph-osd-2
> >> > 2 1.00000 osd.2 up 1.00000
> >> > 1.00000
> >> > 3 1.00000 osd.3 up 1.00000
> >> > 1.00000
> >> > -9 1.00000 host ceph-osd-4
> >> > 6 1.00000 osd.6 up 1.00000
> >> > 1.00000
> >> > 7 1.00000 osd.7 up 1.00000
> >> > 1.00000
> >> > root@ceph-osd-1:~#
> >> >
> >> > I'm using this crush map :
> >> >
> >> > {
> >> > "devices": [
> >> > {
> >> > "id": 0,
> >> > "name": "osd.0"
> >> > },
> >> > {
> >> > "id": 1,
> >> > "name": "osd.1"
> >> > },
> >> > {
> >> > "id": 2,
> >> > "name": "osd.2"
> >> > },
> >> > {
> >> > "id": 3,
> >> > "name": "osd.3"
> >> > },
> >> > {
> >> > "id": 4,
> >> > "name": "osd.4"
> >> > },
> >> > {
> >> > "id": 5,
> >> > "name": "osd.5"
> >> > },
> >> > {
> >> > "id": 6,
> >> > "name": "osd.6"
> >> > },
> >> > {
> >> > "id": 7,
> >> > "name": "osd.7"
> >> > }
> >> > ],
> >> > "types": [
> >> > {
> >> > "type_id": 0,
> >> > "name": "osd"
> >> > },
> >> > {
> >> > "type_id": 1,
> >> > "name": "host"
> >> > },
> >> > {
> >> > "type_id": 2,
> >> > "name": "chassis"
> >> > },
> >> > {
> >> > "type_id": 3,
> >> > "name": "rack"
> >> > },
> >> > {
> >> > "type_id": 4,
> >> > "name": "row"
> >> > },
> >> > {
> >> > "type_id": 5,
> >> > "name": "pdu"
> >> > },
> >> > {
> >> > "type_id": 6,
> >> > "name": "pod"
> >> > },
> >> > {
> >> > "type_id": 7,
> >> > "name": "room"
> >> > },
> >> > {
> >> > "type_id": 8,
> >> > "name": "datacenter"
> >> > },
> >> > {
> >> > "type_id": 9,
> >> > "name": "region"
> >> > },
> >> > {
> >> > "type_id": 10,
> >> > "name": "root"
> >> > }
> >> > ],
> >> > "buckets": [
> >> > {
> >> > "id": -2,
> >> > "name": "ceph-osd-1",
> >> > "type_id": 1,
> >> > "type_name": "host",
> >> > "weight": 131072,
> >> > "alg": "straw",
> >> > "hash": "rjenkins1",
> >> > "items": [
> >> > {
> >> > "id": 0,
> >> > "weight": 65536,
> >> > "pos": 0
> >> > },
> >> > {
> >> > "id": 1,
> >> > "weight": 65536,
> >> > "pos": 1
> >> > }
> >> > ]
> >> > },
> >> > {
> >> > "id": -3,
> >> > "name": "ceph-osd-2",
> >> > "type_id": 1,
> >> > "type_name": "host",
> >> > "weight": 131072,
> >> > "alg": "straw",
> >> > "hash": "rjenkins1",
> >> > "items": [
> >> > {
> >> > "id": 2,
> >> > "weight": 65536,
> >> > "pos": 0
> >> > },
> >> > {
> >> > "id": 3,
> >> > "weight": 65536,
> >> > "pos": 1
> >> > }
> >> > ]
> >> > },
> >> > {
> >> > "id": -4,
> >> > "name": "ceph-osd-3",
> >> > "type_id": 1,
> >> > "type_name": "host",
> >> > "weight": 131072,
> >> > "alg": "straw",
> >> > "hash": "rjenkins1",
> >> > "items": [
> >> > {
> >> > "id": 4,
> >> > "weight": 65536,
> >> > "pos": 0
> >> > },
> >> > {
> >> > "id": 5,
> >> > "weight": 65536,
> >> > "pos": 1
> >> > }
> >> > ]
> >> > },
> >> > {
> >> > "id": -5,
> >> > "name": "eu-west-1a",
> >> > "type_id": 8,
> >> > "type_name": "datacenter",
> >> > "weight": 131072,
> >> > "alg": "straw",
> >> > "hash": "rjenkins1",
> >> > "items": [
> >> > {
> >> > "id": -2,
> >> > "weight": 65536,
> >> > "pos": 0
> >> > },
> >> > {
> >> > "id": -4,
> >> > "weight": 65536,
> >> > "pos": 1
> >> > }
> >> > ]
> >> > },
> >> > {
> >> > "id": -6,
> >> > "name": "eu-west-1b",
> >> > "type_id": 8,
> >> > "type_name": "datacenter",
> >> > "weight": 131072,
> >> > "alg": "straw",
> >> > "hash": "rjenkins1",
> >> > "items": [
> >> > {
> >> > "id": -3,
> >> > "weight": 65536,
> >> > "pos": 0
> >> > },
> >> > {
> >> > "id": -9,
> >> > "weight": 65536,
> >> > "pos": 1
> >> > }
> >> > ]
> >> > },
> >> > {
> >> > "id": -7,
> >> > "name": "eu-west-1",
> >> > "type_id": 9,
> >> > "type_name": "region",
> >> > "weight": 131072,
> >> > "alg": "straw",
> >> > "hash": "rjenkins1",
> >> > "items": [
> >> > {
> >> > "id": -5,
> >> > "weight": 65536,
> >> > "pos": 0
> >> > },
> >> > {
> >> > "id": -6,
> >> > "weight": 65536,
> >> > "pos": 1
> >> > }
> >> > ]
> >> > },
> >> > {
> >> > "id": -8,
> >> > "name": "default",
> >> > "type_id": 10,
> >> > "type_name": "root",
> >> > "weight": 262144,
> >> > "alg": "straw",
> >> > "hash": "rjenkins1",
> >> > "items": [
> >> > {
> >> > "id": -7,
> >> > "weight": 262144,
> >> > "pos": 0
> >> > }
> >> > ]
> >> > },
> >> > {
> >> > "id": -9,
> >> > "name": "ceph-osd-4",
> >> > "type_id": 1,
> >> > "type_name": "host",
> >> > "weight": 131072,
> >> > "alg": "straw",
> >> > "hash": "rjenkins1",
> >> > "items": [
> >> > {
> >> > "id": 6,
> >> > "weight": 65536,
> >> > "pos": 0
> >> > },
> >> > {
> >> > "id": 7,
> >> > "weight": 65536,
> >> > "pos": 1
> >> > }
> >> > ]
> >> > }
> >> > ],
> >> > "rules": [
> >> > {
> >> > "rule_id": 0,
> >> > "rule_name": "replicated_ruleset",
> >> > "ruleset": 0,
> >> > "type": 1,
> >> > "min_size": 1,
> >> > "max_size": 10,
> >> > "steps": [
> >> > {
> >> > "op": "take",
> >> > "item": -8,
> >> > "item_name": "default"
> >> > },
> >> > {
> >> > "op": "choose_firstn",
> >> > "num": 0,
> >> > "type": "datacenter"
> >> > },
> >> > {
> >> > "op": "chooseleaf_firstn",
> >> > "num": 1,
> >> > "type": "host"
> >> > },
> >> > {
> >> > "op": "emit"
> >> > }
> >> > ]
> >> > }
> >> > ],
> >> > "tunables": {
> >> > "choose_local_tries": 0,
> >> > "choose_local_fallback_tries": 0,
> >> > "choose_total_tries": 50,
> >> > "chooseleaf_descend_once": 1,
> >> > "chooseleaf_vary_r": 1,
> >> > "straw_calc_version": 1,
> >> > "allowed_bucket_algs": 54,
> >> > "profile": "hammer",
> >> > "optimal_tunables": 0,
> >> > "legacy_tunables": 0,
> >> > "require_feature_tunables": 1,
> >> > "require_feature_tunables2": 1,
> >> > "require_feature_tunables3": 1,
> >> > "has_v2_rules": 0,
> >> > "has_v3_rules": 0,
> >> > "has_v4_buckets": 0
> >> > }
> >> > }
> >> >
> >> >
> >> > I read a thread
> >> >
> >> > (
> http://lists.ceph.com/pipermail/ceph-users-ceph.com/2013-November/006017.html
> )
> >> > from this mailling list, I tried everything (tunnable to optimal, add
> >> > more
> >> > pg, use the same weight ), but I still got this issue.
> >> >
> >> > Do you have any ideas to fix this situation ?
> >> >
> >> >
> >> >
> >> > _______________________________________________
> >> > ceph-users mailing list
> >> > [email protected]
> >> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> >> >
>
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