test docker image before pushing

Makefile

@@ -76,6 +76,10 @@ docker:
 	@echo ">> building docker image"
 	@docker build -t "$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)" .
 
+test-docker:
+	@echo ">> testing docker image"
+	./test_image.sh "$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)" 9100
+
 $(GOPATH)/bin/promu promu:
 	@GOOS= GOARCH= $(GO) get -u github.com/prometheus/promu
 

circle.yml

@@ -33,6 +33,7 @@ dependencies:
 test:
   override:
     - docker run --rm -t -v "$(pwd):/app" "${DOCKER_TEST_IMAGE_NAME}" -i "${REPO_PATH}" -T
+    - make test-docker 
 
 deployment:
   hub_branch:

test_image.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+set -exo pipefail
+
+docker_image=$1
+port=$2
+
+wait_start() {
+    for in in {1..10}; do
+    if  /usr/bin/curl -s -m 5 -f "http://localhost:${port}/metrics" > /dev/null ; then exit 0 ;
+    else
+      sleep 1
+    fi
+    done
+
+  exit 1
+
+}
+
+docker_start() {
+    docker run -d -p "${port}":"${port}" "${docker_image}"
+}
+
+if [[ "$#" -ne 2 ]] ; then
+    echo "Usage: $0 quay.io/prometheus/node-exporter:v0.13.0 9100" >&2
+    exit 1
+fi
+
+docker_start
+wait_start