Today I learned if you can't use an erasure coded .rgw.buckets.index pool with radosgw. If you do, expect HTTP 500 errors and stuff like rgw_create_bucket returned ret=-95.
My setup: CentOS 7.3.1611 ceph 11.2.0 (Kraken) Apache/2.4.6 PHP 5.5.38 radosgw with via FastCGI I recreated the pool without erasure coding and now it's fine again. I got into this mess in the first place by using http://ceph.com/pgcalc/ to generate the commands, then modified each line for erasure coding. Roger
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