[make] verify benchmark works with curl

Makefile

@@ -151,7 +151,7 @@ benchmark: export WRK_REPORT ?= $(IMAGE_TAG).csv
 benchmark: export DURATION ?= 300
 benchmark:
 	- $(DOCKER_COMPOSE) up --force-recreate -d apicast
-	@sleep 5
+	$(DOCKER_COMPOSE) run curl
 	## warmup round for $(DURATION)/10 seconds
 	DURATION=$$(( $(DURATION) / 10 )) $(DOCKER_COMPOSE) run wrk
 	## run the real benchmark for $(DURATION) seconds

docker-compose.benchmark.yml

@@ -17,3 +17,16 @@ services:
      - ${CIRCLE_WORKING_DIRECTORY:-.}/script/wrk-report.lua:/tmp/wrk/report.lua
      - ${CIRCLE_WORKING_DIRECTORY:-.}/tmp/benchmark:/tmp/wrk/
     command: "--script /tmp/wrk/report.lua --threads ${THREADS:-10} --connections ${CONNECTIONS:-100} --duration ${DURATION:-60} -H 'Host: localhost' http://apicast:8080/echo?user_key=foo"
+
+  curl:
+    image: byrnedo/alpine-curl
+    links:
+      - apicast
+    depends_on:
+      - apicast
+    command: |
+      --retry ${RETRIES:-4}
+      --retry-connrefused
+      --fail
+      -H 'Host: localhost'
+      http://apicast:8080/echo?user_key=foo