security: evaluate possibilities for usage of spiffe/spire

[hpvd]

security: evaluate possibilities for usage of spiffe/spire in Pulsar.

what is spiffe/spire?

Universal identity control plane for distributed systems

SPIFFE and SPIRE provide strongly attested, cryptographic identities to workloads
and allow to establish mTLS connections without keys/secrets/PW

https://spiffe.io/

Good Introduction:
SPIFFE and SPIRE in Practice
https://www.youtube.com/watch?v=XPCJ-usoQjo

Presentation:
https://www.cncf.io/wp-content/uploads/2020/12/HPE-cncf-webinar-spiffe-spire-december.pdf

Usage on the other side (Kafka)
https://www.uber.com/en-DE/blog/securing-kafka-infrastructure-at-uber/