Ceph Object Store: Use "us-east-1" as the default signing region to avoid setting location constraint

[abh1sar]

Description

Fixes #12130

        AmazonS3 client = AmazonS3ClientBuilder.standard()
                .enablePathStyleAccess()
                .withCredentials(
                        new AWSStaticCredentialsProvider(
                                new BasicAWSCredentials(accessKey, secretKey)))
                .withEndpointConfiguration(
                        new AwsClientBuilder.EndpointConfiguration(url, "auto"))
                .build();

Using "auto" as the signingRegion in AwsClientBuilder forces the s3 client to infer region from the url and set it as LocationConstraint while sending the request which is not required for ceph and causes the issue The specified location-constraint is not valid

In PR #10772, the signing_region was changed to null which avoids setting location constraint for some endpoints but not all.
Setting the signing_region as "us-east-1" fixes it for all endpoints as the AWSClient SDK treats "us-east-1" as default and doesn't set any location constraints.

The table below describes what happens to createBucket with different endpoints and signing_regions.

signing_region → endpoint ↓	"auto"	null	"us-east-1"
s3.amazonaws.com	error	pass	pass
s3.us-east-1.amazonaws.com	error	pass	pass
s3.testdomain.com	error	error	pass
s3.us-east-1.testdomain.com	error	pass	pass
test.testdomain.com	pass	pass	pass
s3.amazonaws.testdomain.com	error	error	pass
s3.testdomain.amazonaws.com	error	error	pass

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)
• Build/CI
• Test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

How did you try to break this feature and the system with this change?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 16.22%. Comparing base (ba26d95) to head (ca3f33f).

Additional details and impacted files

@@             Coverage Diff              @@
##               4.20   #12285      +/-   ##
============================================
- Coverage     16.22%   16.22%   -0.01%     
- Complexity    13358    13360       +2     
============================================
  Files          5657     5657              
  Lines        498692   498692              
  Branches      60530    60530              
============================================
- Hits          80932    80920      -12     
- Misses       408738   408743       +5     
- Partials       9022     9029       +7     

Flag	Coverage Δ
uitests	4.00% <ø> (ø)
unittests	17.08% <ø> (-0.01%)	⬇️

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[rohityadavcloud]

Should the default come from pool or global setting instead of being hard-coded ?

[wido]

LGTM

[abh1sar]

Thanks for the quick review.

Should the default come from pool or global setting instead of being hard-coded ?

I don't think we'll need any other value apart from "us-east-1"

[abh1sar]

@blueorangutan package

[blueorangutan]

@abh1sar a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[blueorangutan]

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 16082