Make kubectl run in proxy mode

execution/infrastructure/random-scheduler/Dockerfile

-FROM ubuntu:bionic
+FROM alpine:3.12
 
-RUN apt-get update
-RUN apt-get dist-upgrade
+RUN apk update
 
-RUN apt-get install -y curl jq
+RUN apk add curl jq bash
 
 RUN curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl
 

execution/infrastructure/random-scheduler/schedule.sh

 #!/bin/bash
 
-KUBE_API_SERVER=($(kubectl cluster-info | grep 'Kubernetes master' | awk '/http/ {print $NF}' | awk -F : '{print $1$2}' | awk '{ gsub(/\/\//, "://"); print }'))
-echo "K8's API server: $KUBE_API_SERVER"
+# use kubectl in proxy mode in order to allow curl requesting the k8's api server
+kubectl proxy --port 8080 &
+
 echo "Target Namespace: $TARGET_NAMESPACE"
 while true;
 do
@@ -10,7 +11,7 @@ do
         NODES=($(kubectl get nodes -o json | jq '.items[].metadata.name' | tr -d '"'))
         NUMNODES=${#NODES[@]}
         CHOSEN=${NODES[$[$RANDOM % $NUMNODES]]}
-        curl --insecure --header "Content-Type:application/json" --request POST --data '{"apiVersion":"v1", "kind": "Binding", "metadata": {"name": "'$PODNAME'"}, "target": {"apiVersion": "v1", "kind": "Node", "name": "'$CHOSEN'"}}' https://10.96.0.1/api/v1/namespaces/$TARGET_NAMESPACE/pods/$PODNAME/binding/
+        curl --header "Content-Type:application/json" --request POST --data '{"apiVersion":"v1", "kind": "Binding", "metadata": {"name": "'$PODNAME'"}, "target": {"apiVersion": "v1", "kind": "Node", "name": "'$CHOSEN'"}}' localhost:8080/api/v1/namespaces/$TARGET_NAMESPACE/pods/$PODNAME/binding/
         echo "Assigned $PODNAME to $CHOSEN"
     done
     sleep 1

execution/infrastructure/random-scheduler/test.yaml

-apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
-kind: Deployment
-metadata:
-  name: nginx-deployment
-spec:
-  selector:
-    matchLabels:
-      app: nginx
-  replicas: 2 # tells deployment to run 2 pods matching the template
-  template:
-    metadata:
-      labels:
-        app: nginx
-    spec:
-      schedulerName: random-scheduler
-      containers:
-      - name: nginx
-        image: nginx:1.14.2
-        ports:
-        - containerPort: 80
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