Arrebol deployed in a K8s cluster accessing a K8s API server

[wesleymonte]

The Arrebol has the K8s worker type, which uses the Kubernetes API Server to submit jobs. For this, we created a proxy server, using kubectl proxy command, which proxies the Kubernetes API to localhost interface and after that we can put the proxy address in the arrebol configuration file.

Given this context, when we deploy the arrebol in a K8s cluster, we also need to make it have access to a proxy service in the localhost. For this, it is necessary to run a k8s proxy in a sidecar container in the arrebol pod, so that other processes in any container of the pod can access it. This solution is described in the K8s doc.