Although there is plenty of documentation and examples on performance monitoring, there is minimal documentation on how to monitor the security of the endpoints. This blog outlines how you can use the Prometheus Blackbox Exporter, to do this – I hope you find it useful!
Variable scoping can be quite complicated on Ansible and it’s important to know what variable your playbook is going to be using. But sometimes it’s not as easy as it may appear and I’d like to run you through a scenario we found where the results were quite what was expected.
In this post I will create a Kafka topic and, using the command line tools to alter the retention policy and then confirm that messages are being retained as we would expect them too.
One of our customers have a short TTL for an IoT use case. The data model is a standard Cassandra time series with a sensor ID as the partition key and timestamp as the clustering column.
There was a requirement by this customer to retrieve some data that was already purged due to TTL.