Ceph » rgw

Executing a S3 Request using the following Date Header

Date: Thu, 31 Jan 2013 17:37:37 +0100\r\n

results in the following error message (radosgw.log)

2013-01-31 17:37:37.770023 7fd8577ae700  0 NOTICE: request time skew too big now=2013-01-31 17:37:37.000000 req_time=2013-01-31 18:37:37.000000
2013-01-31 17:37:37.770038 7fd8577ae700 10 failed to authorize request

The Date and Time in the Request itself is correct, the request was issued on Thu, 31 Jan 2013 17:37:37 +0100 (16:37 UTC)

It seems that radosgw takes the "+0100" from the request and adds on hour to the date before comparing it to the local time (which also is UTC+1, server and client are in the same TZ).

This is problematic because not all s3 clients send a UTC Date header "+0000" - the aws-sdk-php (v2) does send utc time, the aws-sdk-ruby however does not.