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Rackspace Public Cloud: PHP-Opencloud SDK errors due to outdated Certificate Authority list

Rackspace Cloud recently rotated the SSL certificate for .

The Rackspace Cloud PHP SDK (PHP-Opencloud) is built on Guzzle, which uses its own certificate authority file. If the certificate authority file is outdated, you may see an error similar to 

Fatal error: Uncaught exception 'Guzzle\Http\Exception\CurlException' with message '[curl] 60: [url]'


Find and replace Guzzle's certificate authority file. For example, it might be located at:


If you download the updated file here: and overwrite, it should resolve this issue. If not, we recommend opening an issue on the github repo.