Docker builds on Travis (#343)

* attempt to build on travis using docker

* run tests in foreground

* add examples to travis tests

* test from current checkout

* attempt to fix docker version issues

* try build with xenial

* attempt docker upgrade

* avoid hang on configuration files

* matrix osx and linux w/ docker

* restore non-test docker builds

* fix typo

* tuning and cleanup

* add missing file

* comment cleanup

test/travis-ci/base_test.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+if [[ $TRAVIS_OS_NAME == 'linux' ]]; then
+  # Linux test uses Docker
+  docker run amplab/ray:test-base bash -c 'source setup-env.sh && cd test && python runtest.py && python array_test.py && python microbenchmarks.py'
+else
+  # Mac OS X test
+  source setup-env.sh
+  pushd test
+    runtest.py
+    python array_test.py
+    python microbenchmarks.py
+  popd
+fi

test/travis-ci/hyperopt_example.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# Hyperparameter optimization test
+# Runs only on Docker under Linux
+if [[ $TRAVIS_OS_NAME == 'linux' ]]; then
+  docker run --shm-size=500m amplab/ray:test-examples bash -c 'source setup-env.sh && cd examples/hyperopt && python driver.py'
+fi

test/travis-ci/install.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+if [[ $TRAVIS_OS_NAME == 'linux' ]]; then
+  # Linux test uses Docker
+
+  # We need to update the Docker version provided by Travis CI
+  # in order to set shm size, a setting required by some of the
+  # tests.
+  sudo apt-get update
+  sudo apt-get -y install apt-transport-https ca-certificates
+  sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
+  echo deb https://apt.dockerproject.org/repo ubuntu-trusty main | sudo tee --append /etc/apt/sources.list.d/docker.list
+  sudo apt-get update
+  sudo apt-get -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" install docker-engine
+  docker version
+
+  # We tar the current checkout, then include it in the Docker image
+  tar --exclude './docker' -cv . > ./docker/test-base/ray.tar
+  docker build --no-cache -t amplab/ray:test-base docker/test-base
+  rm ./docker/test-base/ray.tar
+  docker build --no-cache -t amplab/ray:test-examples docker/test-examples
+  docker ps -a
+else
+  # Mac OS X test
+  ./install-dependencies.sh
+  ./setup.sh
+  ./build.sh
+fi

test/travis-ci/lbfgs_example.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# L-BFGS Test
+# Runs only on Docker under Linux
+if [[ $TRAVIS_OS_NAME == 'linux' ]]; then
+  docker run --shm-size=500m amplab/ray:test-examples bash -c 'source setup-env.sh && cd examples/lbfgs && python driver.py'
+fi