* 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
* Fix fetch of existing records from Google DNS
There has been many complaints regarding `certbot_dns_google` plugin
failing with:
* HTTP 412 - Precondition not met
* HTTP 409 - Conflict
See #6036. This PR fixes that situation. The bug lies on how we
fetch the TXT records from google. For large amount of records
the Google API paginates the result but we ignore the subsequent
pages and assume that if the record is not in the first response then
it doesn't exist. This leads to either HTTP 409, or HTTP 412 or both.
In this PR we leverage the use of filters on the API to get exactly
the records we are looking for. Apart from fixing the problem stated
above, it has the extra benefit of making the process faster by
reducing the amount of API calls and it doesn't require us to handle
any pagination logic
* Explain changes on CHANGELOG
* Edit AUTHORS.md
* make execute static
* Update certbot/CHANGELOG.md
Being more specific for which plugin this fix bug is meant for.
Co-authored-by: alexzorin <alex@zor.io>
* Fix if expression to be more python-idiomatic
Co-authored-by: alexzorin <alex@zor.io>
* Sort AUTHORS.md
* Simplify tests
Make rrs_mock modeling simpler and refactor
* Revert "Simplify tests"
This reverts commit 9de9623ba7.
* Reimplement conditional mock
We still want to use a conditional mock by make it more
simple to understand by using MagicMock.
* Revert "Sort AUTHORS.md"
This reverts commit b3aa35bcf1.
* Add name in AUTHORS.md
Co-authored-by: alexzorin <alex@zor.io>
