Spire or SPIFFE Runtime Environment is a set of APIs that enables establishing trust between software systems accross different environments. https://github.com/spiffe/spire
https://github.com/spiffe/spire-tutorials
https://thebottomturtle.io/Solving-the-bottom-turtle-SPIFFE-SPIRE-Book.pdf
https://github.com/greymatter-io/helm-charts/tree/release-2.3/spire