Monitor Azure Snapshots
As discussed in https://gitlab.com/gitlab-com/infrastructure/issues/1095#note_34289620, we are not monitoring out Azure Snapshots. Because of this, we did not notice that backups weren't being created. We need to monitor the Azure snapshots.
I believe that it would make the most sense to use mtail to check the log on azure.gitlap.com. Basically, we would just want to check for creation of snapshots for each server.
Another solution would be to check the Azure API for snapshots. This would be much more robust. We could check for the existence of the right number of snapshots, for each server, for each day. This would also be much more complicated, as working with the Azure API can be.
I believe the mtail method would suffice.