What's this?

A tiny go program to check whether a kubernetes service has one or more available endpoints. Keeps looping between start time and heat death of universe until one or more ready addresses are found.

This was created because there's currently no good way of saying "don't stand this Pod until service X and Y is available". Now there is: run this as an init container.

Requirements

For local usage, the application requires a kubectl config file in $HOME/.kube/config (overridable using flag -kubeconfig)

To build, glide is required.

Build and usage

Docker:

docker build -t k8s-service-availability .
docker run -v ~/.kube:/.kube --rm k8s-service-availability

Locally

glide up -v
go build -o ./k8stest .
./k8stest -kubeconfig ~/.kube/nonstandardconfiglocation

Usage

Check for endpoint readiness for service servicename in namespace namespacename

./k8stest -namespace namespacename -service servicename

End notes

I have no idea what I'm doing.