Extending a service-per-pod to multiple ports in metacontroller (kubernetes)

Question

I have created a service-per-pod for statefulset, and it's working for a single port (80/tcp). However, I need to use it for multiple ports (e.g., 80/tcp, 30000/udp, etc.).

How can I extend this to multiple ports in service-per-pod Metacontroller?

sync-service-per-pod.jsonnet - image

Answer 1

The service-per-pod sample actually shows you how to do this in manifest/sync-service-per-pod.jsonnet.

The service-per-pod-ports annotation allows you to specify a comma-delimited set of ports which will be exposed by the generated Service:

service-per-pod-ports: "80:80,8080:8080"

Then in sync-service-per-pod.jsonnet:

Get the ports

local ports = statefulset.metadata.annotations["service-per-pod-ports"]

And then loop through them creating multiple ports in the Service spec:

   ports: [
      {
        local parts = std.split(portnums, ":"),
        name: "port-" + std.parseInt(parts[0]),
        port: std.parseInt(parts[0]),
        targetPort: std.parseInt(parts[1]),
      }
      for portnums in std.split(ports, ",")
    ]

Note the for portnums in std.split(ports, ",") iterates over the ports set above.

Looks like you are trying to do something a bit more dynamic, so you could so something like:

for index in std.range(1,N) 

where N is is the maximum value of index.