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1146f35519
* Fix TTL mismatch leading to HTTP 412 This PR is a follow up from #8521 where we address the issue of potentially having a mismatch of TTL when executing a DNS change (transaction = deletion + additions). Let's say we have a record `foo.org 30 IN TXT foo-content` with TTL 30s, when creating challenge or cleaning we might need to perform a deletion operation in the transaction. Currently certbot would ask Google API to delete the foo record like this: `foo.org 60 in TXT foo-content` ignoring the record's original TTL and using 60s instead. This leads to HTTP 412 as Google would expect a perfect match of what we want to delete with what it is on the DNS. See also #8523 * remove ttl from default data to avoid confusions * Refactor tests and add a missing case This commit adds a test that covers the case when we are deleting a TXT record which contains a single rrdatas. Also, refactoring a couple of tests. * Make get_existing_txt_rrset documentation more precise about return value * Add missing assertions in tests. * fix linting issues * Mention fix on changelog * Explain fix around user impact * Explain what happens when no records are returned * Update certbot/CHANGELOG.md * Update certbot/CHANGELOG.md
Google Cloud DNS Authenticator plugin for Certbot