This is the yaml file that can be used with the elastic profile for the k8s plugin. This downloads kubectl and helm and makes it available for gocd agent to deploy to a cluster.

agent.yaml

apiVersion: v1
kind: Pod
metadata:
  name: gocd-agent
  labels:
    app: web
spec:
  volumes:
    - name: kubectl-and-helm
      emptyDir: {}
  initContainers:
    - name: download-kubectl-and-helm
      image: "alpine:latest"
      imagePullPolicy: "IfNotPresent"
      volumeMounts:
        - name: kubectl-and-helm
          mountPath: /download
      workingDir: /download
      command: ["/bin/sh"]
      args:
        - "-c"
        - 'apk add curl && curl -LO https://gist.githubusercontent.com/varshavaradarajan/ec3c2192937f8ff024d64df5ec85501b/raw/28c5c080464e3535da70a260117ae5f36a85bac3/download_kubectl_and_helm.sh && chmod +x download_kubectl_and_helm.sh && sh download_kubectl_and_helm.sh'
  containers:
    - name: gocd-agent-container
      image: gocd/gocd-agent-docker-dind:v19.3.0
      volumeMounts:
        - name: kubectl-and-helm
          mountPath: /usr/local/bin/helm
          subPath: helm
        - name: kubectl-and-helm
          mountPath: /usr/local/bin/tiller
          subPath: tiller
        - name: kubectl-and-helm
          mountPath: /usr/local/bin/kubectl
          subPath: kubectl
      securityContext:
        privileged: true