Install aodh-expirer by entering the following commands in the terminal:
sudo apt update sudo apt install aodh-expirer
OpenStack Telemetry (Ceilometer) Alarming - expirer
Ceilometer aims to deliver a Single Point Of Contact for billing systems, providing all the counters they need to establish customer billing, across all current and future OpenStack components. The delivery of counters must be traceable and auditable, the counters must be easily extensible to support new projects, and agents doing data collections should be independent of the overall system. . (A ceilometer is an instrument that measures cloud coverage.) . This package contains the expirer. it is the script that handles time-to-live support, when it is not natively supported by the database backend.