OpenSSL changed the CN output formatting with the release of 1.1. acme-tiny parses this formatting, and the version shipping in Fedora isn't resilient to the change. So, renewals will fail. Upstream has applied the following patch, which is working for me right now: https://github.com/diafygi/acme-tiny/commit/9537453586cd5124d5e4e46d78f9ed909180835d Might be a good time to re-sync with upstream?
I'm moving to this commit: https://github.com/diafygi/acme-tiny/commit/af025f5bf19c70be7fafab67f4dd718ca7bf9adf
acme-tiny-0.2-1.20170516gitaf025f5.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2017-5773468f36
acme-tiny-0.2-1.20170516gitaf025f5.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-5773468f36
This change broke python2. It works in F26 because python3 is used by default.
acme-tiny-0.2-1.20170516gitaf025f5.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.