Today every application has microservices architecture where individual services are spread across public clouds and multiple Kubernetes clusters. Since all the communication of messages among services happens over the internet, it is very important to ensure the security of your data. You don’t want any malicious guy to read and record the data-in-transit (known as packet sniffing), or intervene in between the communication as someone you trust (IP spoofing), or perform a DoS attack such as bandwidth flooding or connection flooding, etc.

The idea is security should always be developed in a layered approach to build defense in depth. When software engineers are developing containerized applications they need to think about security at Code, Container, Cluster, and Cloud levels (read 4 C’s of container security). 

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