This changeset switches AWS service touchpoints to use their FIPS-enabled counterparts. Note that S3 has some specific configuration associated with it.
This changeset also updates our allow ACLs to cover the FIPS-enabled endpoints. We should investigate removing the non-FIPS endpoints as a part of this.
Signed-off-by: Carlo Costino <carlo.costino@gsa.gov>
Previously we made a call to S3 to list objects for a letter, even
though we already had the precise key of the single object to hand.
This removes the one usage of "get_s3_bucket_objects" and uses the
filename directly in the call to remove the object.
Once a contact list is gone from the database there’s no way to
reference it again. Any jobs have made their own copy.
So we can clean it up, meaning we’re not storing personal data longer
than we need to.
Previously, when running the `collate_letter_pdfs_for_day` task, we
would only send letters that were created between 5:30pm yesterday and
5:30 today.
Now we send letters that were created before 5:30pm today and that are
still waiting to be sent. This will help us automatically attempt to
send letters that may have fallen through the gaps and not been sent the
previous day when they should have been.
Previously we solved the problem of letters that had fallen the gap by
having to run the task with a date parameter for example
`collate_letter_pdfs_for_day('2020-02-18'). We no longer need this date
parameter as we will always look back across previous days too for
letters that still need sending.
Note, we have to change from using the pagination `list_objects_v2` to
instead getting each individual notification from s3. We reduce load by
using `HEAD` rather than `GET` but this will still greatly increase the
number of API calls. We acknowledge there will be a small cost to this,
say 50p for 5000 letters and think this is tolerable. Boto3 also handles
retries itself so if when making one of the many HEAD requests, there is
a networking blip then it should be retried automatically for us.
If there are no files to delete we won't get an excpetion.
Wrap the delete file in a try/except to avoid stopping the entire task.
Fix the missing slash for the file name.
when a test letter is created on dev or preview, we upload a file to
the dvla ftp response bucket, to test that our integration with s3
works. s3 triggers an sns notification, which we pick up, and then we
download the file and mark the letters it mentions as delivered.
However, if two tests run at the same time, they'll create the same
file on s3. One will just overwrite the next, and the first letter will
never move into delivered - this was causing functional tests to
intermittently fail.
This commit makes the test letter task check if the file exists - if it
does, it moves back one second and tries again. It tries this thirty
times before giving up.
All of our uploads now have the metadata about the job set on them in
S3. So this commit moves to using that metadata, if it’s there, instead
of the data in the body of the post request.
The aim of this is to stop the admin app having to post this data, which
means that it won’t have to keep this data in the session for the
while doing the file upload flow.
