Simple scale script

Adds a script that can be used with the the local kind cluster to test
the impact of changes to whereabouts from a scale perspective

Signed-off-by: Benjamin Pickard <bpickard@redhat.com>

script/scale-test.sh

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+#!/bin/bash
+set -eo pipefail
+
+#An easy way to run this is to create a kind cluster using ./hack/e2e-setup-kind-cluster
+
+HERE="$(dirname "$(readlink --canonicalize ${BASH_SOURCE[0]})")"
+ROOT="$(readlink --canonicalize "$HERE/..")"
+WHEREABOUTSNAD="$ROOT/yamls/whereaboutsScaleNAD.yaml"
+SCALEDEPLOYMENT="$ROOT/yamls/scaleTestDeployment.yaml"
+
+#create the whereabouts nad
+oc apply -f "$WHEREABOUTSNAD"
+#start a timer to record how long the pods take to spin up
+start=$SECONDS
+#create the deployment (change the replicas feild in the scale-deployment yaml if you want to test a different number of pods)
+oc apply -f "$SCALEDEPLOYMENT"
+kubectl rollout status deploy/scale-deployment
+#wait for all pods to be deployed
+
+#Log the amount of time it took the pods to create
+createTime=$(( SECONDS - start ))
+echo Pod creation duration:"$createTime"
+
+#delete the deployment and track pod deletion timing
+oc delete deploy/scale-deployment
+

yamls/scaleTestDeployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: scale-deployment
+  labels:
+    app: scale-deployment
+spec:
+  replicas: 10 #use this to modify the number of pods spun up by the scale-test script 
+  selector:
+    matchLabels:
+      app: scale-pod
+  template:
+    metadata:
+      annotations:
+        k8s.v1.cni.cncf.io/networks: whereabouts-scale
+      labels:
+        app: scale-pod
+    spec:
+      containers:
+      - name: scale
+        image: nicolaka/netshoot
+        command:
+          - sleep
+          - "3600"
+        imagePullPolicy: IfNotPresent

yamls/whereaboutsScaleNAD.yaml

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+apiVersion: "k8s.cni.cncf.io/v1"
+kind: NetworkAttachmentDefinition
+metadata:
+  name: whereabouts-scale
+spec:
+  config: '{
+      "cniVersion": "0.3.0",
+      "name": "whereabouts-scale",
+      "type": "macvlan",
+      "master": "eth0",
+      "mode": "bridge",
+      "ipam": {
+        "type": "whereabouts",
+        "range": "192.168.2.225/24"
+      }
+    }'