Kubernetes: Run a container once on demand from another container?

Question

Kubernetes

Good afternoon!
I am designing a video processing system, tell me, let's say I have a Pod in which api-container works, it processes all incoming requests from clients via HTTPs, for some requests you need to run a separate container (in a separate Node / Pod designed for this), which will transcode the video for quite a long time. Can you tell me how you can run such a container once? Or even several to parallelize tasks?
Sincerely.

Answer 1

You can do Horizontal Pod Autoscaling ( https://kubernetes.io/docs/tasks/run-application/h... based on custom metric - number of videos for processing.

Answer 2

Through Jobs in K8s API. The link specs in YAML and kubectl, but for the application you need to knock directly, so you need to:

1. make a service account with the rights to create/read/track them
   
2. add this account to api-container spec
   
3. send JSON specs of these jobs to kubernetes address