Ceph RGW (and Linode Object Storage, which is Ceph-backed) can break
SigV4 when Accept-Encoding is included in the signature, especially
when a reverse proxy rewrites that header. GCS already sets this quirk;
apply the same default for Ceph and Linode as suggested in #8206.
Before this change, uploading to an existing bucket on Ceph (radosgw)
could fail with:
BucketAlreadyExists: 409 Conflict
when rclone attempted to create the destination bucket (which it does
by default unless --s3-no-check-bucket is set).
The Ceph rgw S3 implementation never returns BucketAlreadyOwnedByYou;
it returns BucketAlreadyExists for every CreateBucket on an existing
bucket, even one the caller owns. With the use_already_exists quirk
set to true, rclone wraps BucketAlreadyExists as a non-retriable error
and aborts the transfer.
The Ceph provider used to set useAlreadyExists = true explicitly. When
the s3 providers were converted to YAML files in f28c83c, Ceph did not
set use_already_exists so it picked up the default of true (via
set(&opt.UseAlreadyExists, true, provider.Quirks.UseAlreadyExists)),
which matched the previous behaviour but is the wrong setting for
Ceph.
This sets use_already_exists: false for the Ceph provider so rclone
ignores BucketAlreadyExists on CreateBucket and continues with the
upload.
Side effect: this partially reverts #7871 for the Ceph provider. If a
user tries to create a bucket on Ceph that is actually owned by
someone else, rclone will no longer fail fast at CreateBucket time;
the subsequent object PUT will fail instead. This is unavoidable on
Ceph since the server does not distinguish "already owned by you" from
"owned by someone else".
Before this change, you had to modify a fragile data-structure
containing all providers. This often led to things being out of order,
duplicates and conflicts whilst merging. As well as the changes for
one provider being in different places across the file.
After this change, new providers are defined in an easy to edit YAML file,
one per provider.
The config output has been tested before and after for all providers
and any changes are cosmetic only.
Aditya
Jan Heylen
dougal