Best practice for release configurations in EKS


We are using juju on EKS. Is there a best practice way to configure release configurations with e.g. node-affinity and/or container environment variables?

I am aware that one possible way is to configure node affinity with the “constraints” flag and set Tags. However this is not supported in EKS. The tags only work with machines created with juju and we cannot create machines on eks with juju, from my understanding.