rbd map on octopus from luminous client

[Marc Boisis <marc.boisis@xxxxxxxxxx>]

Hi,

I had to map a rbd from an ubuntu Trusty  luminous client on an octopus cluster.

client dmesg :
feature set mismatch, my 4a042a42 < server's 100004a042a42, missing 1000000000000

I downgrade my osd tunable to bobtail but it still doesn't work

ceph osd crush show-tunables
{
   "choose_local_tries": 0,
   "choose_local_fallback_tries": 0,
   "choose_total_tries": 50,
   "chooseleaf_descend_once": 1,
   "chooseleaf_vary_r": 0,
   "chooseleaf_stable": 0,
   "straw_calc_version": 1,
   "allowed_bucket_algs": 22,
   "profile": "bobtail",
   "optimal_tunables": 0,
   "legacy_tunables": 0,
   "minimum_required_version": "hammer",
   "require_feature_tunables": 1,
   "require_feature_tunables2": 1,
   "has_v2_rules": 0,
   "require_feature_tunables3": 0,
   "has_v3_rules": 0,
   "has_v4_buckets": 1,
   "require_feature_tunables5": 0,
   "has_v5_rules": 0
}

Thanks for your help.

Marc
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