boskos: Deploying a new Boskos janitor for AWS

This patch deploys a new Boskos janitor as a service in the same cluster
running Prow. The new service is named `boskos-janitor-aws`.

Related to kubernetes-sigs/cluster-api-provider-aws#272 and
kubernetes-sigs/cluster-api-provider-aws#606.

/area boskos

Makefile

@@ -32,6 +32,9 @@ reaper:
 janitor:
 	go build -o janitor/janitor k8s.io/test-infra/boskos/janitor/
 
+janitor-aws:
+	$(MAKE) -C ../maintenance/aws-janitor/cmd/aws-janitor-boskos
+
 metrics:
 	go build -o metrics/metrics k8s.io/test-infra/boskos/metrics/
 
@@ -53,6 +56,12 @@ janitor-image:
 	docker push "$(HUB)/janitor:$(TAG)"
 	rm janitor/janitor
 
+janitor-aws-image: export DOCKER_OPTS=--no-cache
+janitor-aws-image: export IMAGE=$(HUB)/janitor-aws
+janitor-aws-image:
+	$(MAKE) -C ../maintenance/aws-janitor/cmd/aws-janitor-boskos image push
+	$(MAKE) -C ../maintenance/aws-janitor/cmd/aws-janitor-boskos clean
+
 metrics-image:
 	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o metrics/metrics k8s.io/test-infra/boskos/metrics/
 	docker build -t "$(HUB)/metrics:$(TAG)" metrics
@@ -81,4 +90,4 @@ update-config: get-cluster-credentials
 get-cluster-credentials:
 	gcloud container clusters get-credentials "$(CLUSTER)" --project="$(PROJECT)" --zone="$(ZONE)"
 
-.PHONY: boskos client reaper janitor metrics server-image reaper-image janitor-image metrics-image server-deployment reaper-deployment janitor-deployment metrics-deployment service update-config get-cluster-credentials
+.PHONY: boskos client reaper janitor janitor-aws metrics server-image reaper-image janitor-image janitor-aws-image metrics-image server-deployment reaper-deployment janitor-deployment metrics-deployment service update-config get-cluster-credentials

janitor/deployment.yaml

@@ -61,4 +61,24 @@ spec:
       - name: service
         secret:
           secretName: service-account
-
+---
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: boskos-janitor-aws
+  labels:
+    app: boskos-janitor-aws
+  namespace: test-pods
+spec:
+  replicas: 4  # 4 distributed janitor instances
+  template:
+    metadata:
+      labels:
+        app: boskos-janitor-aws
+    spec:
+      terminationGracePeriodSeconds: 300
+      containers:
+      - name: boskos-janitor-aws
+        image: gcr.io/k8s-testimages/janitor-aws:latest
+        args:
+        - --boskos-url=http://boskos.test-pods.svc.cluster.local.