Thank you again Casey for putting us on the right track regarding the
changes in multisite resharding support.
When going through the various changelogs we didn't pay too much
attention to those changes as this cluster doesn't use any multisite
features.
We have now upgraded to Reef and all buckets except one are usable
again. The rados objects seem to still exist, so we might have luck with
something like rgw-restore-bucket-index.
On 03/04/2024 21:43, Casey Bodley wrote:
On Wed, Apr 3, 2024 at 3:09 PM Lorenz Bausch <info@xxxxxxxxxxxxxxx> wrote:
Hi Casey,
thank you so much for analysis! We tested the upgraded intensively, but
the buckets in our test environment were probably too small to get
dynamically resharded.
after upgrading to the Quincy release, rgw would
look at the wrong object names when trying to list those buckets.
As we're currently running Quincy, do you think objects/bucket indexes
might already be altered in a way which makes them also unusable for
Reef?
for multisite resharding support, the bucket instance metadata now
stores an additional 'layout' structure which contains all of the
information necessary to locate its bucket index objects. on reshard,
the Red Hat pacific release would have stored that information with
the bucket. the upstream Reef release should be able to interpret that
layout data correctly
however, if the Quincy release overwrites that bucket instance
metadata (via an operation like PutBucketAcl, PutBucketPolicy, etc),
the corresponding layout information would be erased such that an
upgrade to Reef would not be able to find the real bucket index shard
objects
Kind regards,
Lorenz
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