Add integration test infra

Currently libnetwork does not have any integration test infra
support to tests libnetwork code end2end purely as a black
box. This initial commit adds the infra support to enable
test cases for this.

Signed-off-by: Jana Radhakrishnan <mrjana@docker.com>

libnetwork/.gitignore

@@ -4,6 +4,7 @@
 *.so
 
 # Folders
+integration-tmp/
 _obj
 _test
 

libnetwork/Makefile

@@ -1,4 +1,4 @@
-.PHONY: all all-local build build-local check check-code check-format run-tests check-local install-deps coveralls circle-ci
+.PHONY: all all-local build build-local check check-code check-format run-tests check-local integration-tests install-deps coveralls circle-ci
 SHELL=/bin/bash
 build_image=libnetwork-build
 dockerargs = --privileged -v $(shell pwd):/go/src/github.com/docker/libnetwork -w /go/src/github.com/docker/libnetwork
@@ -7,8 +7,15 @@ docker = docker run --rm -it ${dockerargs} ${container_env} ${build_image}
 ciargs = -e "COVERALLS_TOKEN=$$COVERALLS_TOKEN" -e "INSIDECONTAINER=-incontainer=true"
 cidocker = docker run ${ciargs} ${dockerargs} golang:1.4
 
-all: ${build_image}.created
-	${docker} ./wrapmake.sh all-local
+all: ${build_image}.created build check integration-tests
+
+integration-tests:
+	@if [ ! -d ./integration-tmp ]; then \
+	    mkdir -p ./integration-tmp;	\
+	    git clone https://github.com/sstephenson/bats.git ./integration-tmp/bats; \
+	    ./integration-tmp/bats/install.sh ./integration-tmp; \
+	fi
+	@./integration-tmp/bin/bats ./test/integration/dnet
 
 all-local: check-local build-local
 
@@ -19,13 +26,16 @@ ${build_image}.created:
 	touch ${build_image}.created
 
 build: ${build_image}.created
-	${docker} ./wrapmake.sh build-local
+	@echo "Building code... "
+	@${docker} ./wrapmake.sh build-local
+	@echo "Done building code"
 
 build-local:
-	$(shell which godep) go build -tags libnetwork_discovery ./...
+	@$(shell which godep) go build -tags libnetwork_discovery ./...
+	@$(shell which godep) go build -o ./cmd/dnet/dnet ./cmd/dnet
 
 check: ${build_image}.created
-	${docker} ./wrapmake.sh check-local
+	@${docker} ./wrapmake.sh check-local
 
 check-code:
 	@echo "Checking code... "
@@ -76,4 +86,5 @@ coveralls:
 # The following target is a workaround for this
 
 circle-ci:
-	@${cidocker} make install-deps check-local coveralls
+	@${cidocker} make install-deps build-local check-local coveralls
+	make integration-tests

libnetwork/cmd/dnet/dnet.go

@@ -27,7 +27,7 @@ import (
 
 const (
 	// DefaultHTTPHost is used if only port is provided to -H flag e.g. docker -d -H tcp://:8080
-	DefaultHTTPHost = "127.0.0.1"
+	DefaultHTTPHost = "0.0.0.0"
 	// DefaultHTTPPort is the default http port used by dnet
 	DefaultHTTPPort = 2385
 	// DefaultUnixSocket exported

libnetwork/test/integration/dnet/helpers.bash

@@ -0,0 +1,54 @@
+function start_consul() {
+    docker run -d --name=pr_consul -p 8500:8500 -p 8300-8302:8300-8302/tcp -p 8300-8302:8300-8302/udp -h consul progrium/consul -server -bootstrap
+    sleep 2
+}
+
+function stop_consul() {
+    docker stop pr_consul
+    # You cannot destroy a container in Circle CI. So do not attempt destroy in circleci
+    if [ -z "$CIRCLECI" ]; then
+	docker rm pr_consul
+    fi
+}
+
+function start_dnet() {
+    name="dnet-$1"
+    hport=$((41000+${1}-1))
+
+    bridge_ip=$(docker inspect --format '{{.NetworkSettings.Gateway}}' pr_consul)
+    mkdir -p /tmp/dnet/${name}
+    tomlfile="/tmp/dnet/${name}/libnetwork.toml"
+    cat > ${tomlfile} <<EOF
+title = "LibNetwork Configuration file"
+
+[daemon]
+  debug = false
+  defaultnetwork = "${2}"
+  defaultdriver = "${3}"
+  labels = ["com.docker.network.driver.overlay.bind_interface=eth0"]
+[datastore]
+  embedded = false
+[datastore.client]
+  provider = "consul"
+  Address = "${bridge_ip}:8500"
+EOF
+    docker run -d --name=${name}  --privileged -p ${hport}:2385 -v $(pwd)/:/go/src/github.com/docker/libnetwork -v /tmp:/tmp -w /go/src/github.com/docker/libnetwork golang:1.4 ./cmd/dnet/dnet -dD -c ${tomlfile}
+    sleep 2
+}
+
+function stop_dnet() {
+    name="dnet-$1"
+    rm -rf /tmp/dnet/${name}
+    docker stop ${name}
+    # You cannot destroy a container in Circle CI. So do not attempt destroy in circleci
+    if [ -z "$CIRCLECI" ]; then
+	docker rm ${name} || true
+    fi
+
+}
+
+function dnet_cmd() {
+    hport=$((41000+${1}-1))
+    shift
+    ./cmd/dnet/dnet -H 127.0.0.1:${hport} $*
+}

libnetwork/test/integration/dnet/simple.bats

@@ -0,0 +1,34 @@
+#!/usr/bin/env bats
+
+load helpers
+
+export BATS_TEST_CNT=0
+
+function setup() {
+    if [ "${BATS_TEST_CNT}" -eq 0 ]; then
+	start_consul
+	start_dnet 1 multihost overlay
+	export BATS_TEST_CNT=$((${BATS_TEST_CNT}+1))
+    fi
+}
+
+function teardown() {
+    export BATS_TEST_CNT=$((${BATS_TEST_CNT}-1))
+    if [ "${BATS_TEST_CNT}" -eq 0 ]; then
+	stop_dnet 1
+	stop_consul
+    fi
+}
+
+
+@test "Test default network" {
+    echo $(docker ps)
+    run dnet_cmd 1 network ls
+    echo ${output}
+    echo ${lines[1]}
+    name=$(echo ${lines[1]} | cut -d" " -f2)
+    driver=$(echo ${lines[1]} | cut -d" " -f3)
+    echo ${name} ${driver}
+    [ "$name" = "multihost" ]
+    [ "$driver" = "overlay" ]
+}