Stein Series Release Notes

8.0.0

Prelude

Added new tool zaqar-status upgrade check.

New Features

• Add an new option named ‘message_delete_with_claim_id’, when it is True, delete messages must need claim_ids and message_ids both in request parameters. This will improve the security of the message.

• Currently the email subscriptions in Zaqar rely on the third part tools, such as “sendmail”. It means that deployer should install it out of Zaqar. If he forgets, Zaqar will raise internal error. This work let Zaqar support email subscription by itself using the smtp python library.

• Introduce a new resource called Topic into Zaqar. Topic is a concept from AWS Simple Notification Service (SNS), it will has relevance with subscriptions. User can send message to a topic, and then the subscribers will get the message according to different protocols, like http, email, SMS, etc. This feature will help Zaqar to split Messaging Queue Service and Notification Service clearly.

• In Queens, we support the old way to use pool_group and the new way without it in Flavour both. In Stein, we will remove the pool_group totally and only keep the new way in Flavour and Pool.

• New framework for zaqar-status upgrade check command is added. This framework allows adding various checks which can be run before a Zaqar upgrade to ensure if the upgrade can be performed safely.

Upgrade Notes

• Operator can now use new CLI tool zaqar-status upgrade check to check if Zaqar deployment can be safely upgraded from N-1 to N release.