> but I still don’t get the use case for docker and containers and kubernets and and orchestration
For docker there's a simple motivating case: some services are difficult to configure securely with minimal permissions, and having a standard docker image provided by people who know what they're doing would be a big net win for security on the internet. There are a lot of poorly configured and insecure http server's out there. Think about how many vulnerable http servers are running on routers.
I would argue that poorly configured docker images as far bigger issue than insecure http servers: https://www.infoq.com/news/2020/12/dockerhub-image-vulnerabi...
Security wasn’t the motivation imho, but being able to package your app with all it’s dependencies, including OS libs and deliver it extremely easy, sure was.
> I would argue that poorly configured docker images as far bigger issue than insecure http servers
I think the number of router vulnerabilities alone refutes this argument. Yes, security wasn't the original motivation, but it could be one good motivation.
For docker there's a simple motivating case: some services are difficult to configure securely with minimal permissions, and having a standard docker image provided by people who know what they're doing would be a big net win for security on the internet. There are a lot of poorly configured and insecure http server's out there. Think about how many vulnerable http servers are running on routers.