Merge branch 'master' into base_log

65 files changed, 431 insertions, 223 deletions

diff --git a/tools/distrib/build_ruby_environment_macos.sh b/tools/distrib/build_ruby_environment_macos.sh
new file mode 100644
index 0000000000..ff3a388eaf
--- /dev/null
+++ b/tools/distrib/build_ruby_environment_macos.sh
@@ -0,0 +1,61 @@
+#!/bin/bash
+# Copyright 2015-2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set -ex
+
+rm -rf ~/.rake-compiler
+
+CROSS_RUBY=`mktemp tmpfile.XXXXXXXX`
+
+curl https://raw.githubusercontent.com/rake-compiler/rake-compiler/v0.9.5/tasks/bin/cross-ruby.rake > $CROSS_RUBY
+
+patch $CROSS_RUBY << EOF
+--- cross-ruby.rake	2016-02-05 16:26:53.000000000 -0800
++++ cross-ruby.rake.patched	2016-02-05 16:27:33.000000000 -0800
+@@ -133,7 +133,8 @@
+     "--host=#{MINGW_HOST}",
+     "--target=#{MINGW_TARGET}",
+     "--build=#{RUBY_BUILD}",
+-    '--enable-shared',
++    '--enable-static',
++    '--disable-shared',
+     '--disable-install-doc',
+     '--without-tk',
+     '--without-tcl'
+EOF
+
+MAKE="make -j8"
+
+for v in 2.3.0 2.2.2 2.1.5 2.0.0-p645 ; do
+  rake -f $CROSS_RUBY cross-ruby VERSION=$v HOST=x86_64-darwin11
+done
+
+sed 's/x86_64-darwin-11/universal-darwin/' ~/.rake-compiler/config.yml > $CROSS_RUBY
+mv $CROSS_RUBY ~/.rake-compiler/config.yml
diff --git a/tools/dockerfile/distribtest/csharp_centos7_x64/Dockerfile b/tools/dockerfile/distribtest/csharp_centos7_x64/Dockerfile
index 17e9698904..03b5b364f8 100644
--- a/tools/dockerfile/distribtest/csharp_centos7_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/csharp_centos7_x64/Dockerfile
@@ -33,6 +33,5 @@ RUN rpm --import "http://keyserver.ubuntu.com/pks/lookup?op=get&search=0x3FA7E03
 RUN yum-config-manager --add-repo http://download.mono-project.com/repo/centos/
 
 RUN yum install -y mono
-RUN yum install -y git
 RUN yum install -y unzip
 RUN yum install -y nuget
diff --git a/tools/dockerfile/distribtest/csharp_jessie_x64/Dockerfile b/tools/dockerfile/distribtest/csharp_jessie_x64/Dockerfile
index 840ecf0fc2..1cadba3b7b 100644
--- a/tools/dockerfile/distribtest/csharp_jessie_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/csharp_jessie_x64/Dockerfile
@@ -40,4 +40,4 @@ RUN apt-get update && apt-get install -y \
     ca-certificates-mono \
     nuget
 
-RUN apt-get update && apt-get install -y git unzip
+RUN apt-get update && apt-get install -y unzip
diff --git a/tools/dockerfile/distribtest/csharp_jessie_x86/Dockerfile b/tools/dockerfile/distribtest/csharp_jessie_x86/Dockerfile
index 3a50da4936..be962828c2 100644
--- a/tools/dockerfile/distribtest/csharp_jessie_x86/Dockerfile
+++ b/tools/dockerfile/distribtest/csharp_jessie_x86/Dockerfile
@@ -40,4 +40,4 @@ RUN apt-get update && apt-get install -y \
     ca-certificates-mono \
     nuget
 
-RUN apt-get update && apt-get install -y git unzip
+RUN apt-get update && apt-get install -y unzip
diff --git a/tools/dockerfile/distribtest/csharp_ubuntu1404_x64/Dockerfile b/tools/dockerfile/distribtest/csharp_ubuntu1404_x64/Dockerfile
index 901c981acb..3d04d032b5 100644
--- a/tools/dockerfile/distribtest/csharp_ubuntu1404_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/csharp_ubuntu1404_x64/Dockerfile
@@ -37,4 +37,4 @@ RUN apt-get update && apt-get install -y \
     ca-certificates-mono \
     nuget
 
-RUN apt-get update && apt-get install -y git unzip
+RUN apt-get update && apt-get install -y unzip
diff --git a/tools/dockerfile/distribtest/csharp_ubuntu1504_x64/Dockerfile b/tools/dockerfile/distribtest/csharp_ubuntu1504_x64/Dockerfile
index 1b8d454681..5eec570491 100644
--- a/tools/dockerfile/distribtest/csharp_ubuntu1504_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/csharp_ubuntu1504_x64/Dockerfile
@@ -37,4 +37,4 @@ RUN apt-get update && apt-get install -y \
     ca-certificates-mono \
     nuget
 
-RUN apt-get update && apt-get install -y git unzip
+RUN apt-get update && apt-get install -y unzip
diff --git a/tools/dockerfile/distribtest/csharp_ubuntu1510_x64/Dockerfile b/tools/dockerfile/distribtest/csharp_ubuntu1510_x64/Dockerfile
index a6c26a4b9e..a6d60fb4b9 100644
--- a/tools/dockerfile/distribtest/csharp_ubuntu1510_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/csharp_ubuntu1510_x64/Dockerfile
@@ -37,4 +37,4 @@ RUN apt-get update && apt-get install -y \
     ca-certificates-mono \
     nuget
 
-RUN apt-get update && apt-get install -y git unzip
+RUN apt-get update && apt-get install -y unzip
diff --git a/tools/dockerfile/distribtest/csharp_ubuntu1604_x64/Dockerfile b/tools/dockerfile/distribtest/csharp_ubuntu1604_x64/Dockerfile
index c6a8634937..61472704d7 100644
--- a/tools/dockerfile/distribtest/csharp_ubuntu1604_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/csharp_ubuntu1604_x64/Dockerfile
@@ -34,4 +34,4 @@ RUN apt-get update && apt-get install -y \
     ca-certificates-mono \
     nuget
 
-RUN apt-get update && apt-get install -y git unzip
+RUN apt-get update && apt-get install -y unzip
diff --git a/tools/dockerfile/distribtest/csharp_wheezy_x64/Dockerfile b/tools/dockerfile/distribtest/csharp_wheezy_x64/Dockerfile
index dd865e8bbc..9039c3c509 100644
--- a/tools/dockerfile/distribtest/csharp_wheezy_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/csharp_wheezy_x64/Dockerfile
@@ -29,4 +29,4 @@
 
 FROM mono:4.2.2.30
 
-RUN apt-get update && apt-get install -y git unzip
+RUN apt-get update && apt-get install -y unzip
diff --git a/tools/dockerfile/distribtest/node_centos7_x64/Dockerfile b/tools/dockerfile/distribtest/node_centos7_x64/Dockerfile
index 9c1f5ee729..f6e1664086 100644
--- a/tools/dockerfile/distribtest/node_centos7_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/node_centos7_x64/Dockerfile
@@ -29,7 +29,6 @@
 
 FROM centos:7
 
-RUN yum install -y git
 RUN yum install -y curl
 
 # Install nvm
diff --git a/tools/dockerfile/distribtest/node_jessie_x64/Dockerfile b/tools/dockerfile/distribtest/node_jessie_x64/Dockerfile
index 69a071500e..4ca5e86563 100644
--- a/tools/dockerfile/distribtest/node_jessie_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/node_jessie_x64/Dockerfile
@@ -29,7 +29,7 @@
 
 FROM debian:jessie
 
-RUN apt-get update && apt-get install -y curl git
+RUN apt-get update && apt-get install -y curl
 
 # Install nvm
 RUN touch .profile
diff --git a/tools/dockerfile/distribtest/node_jessie_x86/Dockerfile b/tools/dockerfile/distribtest/node_jessie_x86/Dockerfile
index 173c70360d..8b97d8bb5a 100644
--- a/tools/dockerfile/distribtest/node_jessie_x86/Dockerfile
+++ b/tools/dockerfile/distribtest/node_jessie_x86/Dockerfile
@@ -29,8 +29,8 @@
 
 FROM 32bit/debian:jessie
 
-RUN apt-get update && apt-get install -y curl git
+RUN apt-get update && apt-get install -y curl
 
 # Install nvm
 RUN touch .profile
-RUN curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.30.2/install.sh | bash
\ No newline at end of file
+RUN curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.30.2/install.sh | bash
diff --git a/tools/dockerfile/distribtest/node_ubuntu1204_x64/Dockerfile b/tools/dockerfile/distribtest/node_ubuntu1204_x64/Dockerfile
index c53a4aa305..0134dc964e 100644
--- a/tools/dockerfile/distribtest/node_ubuntu1204_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/node_ubuntu1204_x64/Dockerfile
@@ -29,7 +29,7 @@
 
 FROM ubuntu:12.04
 
-RUN apt-get update && apt-get install -y curl git
+RUN apt-get update && apt-get install -y curl
 
 # Install nvm
 RUN touch .profile
diff --git a/tools/dockerfile/distribtest/node_ubuntu1404_x64/Dockerfile b/tools/dockerfile/distribtest/node_ubuntu1404_x64/Dockerfile
index 8fe6ae1f33..0fae447946 100644
--- a/tools/dockerfile/distribtest/node_ubuntu1404_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/node_ubuntu1404_x64/Dockerfile
@@ -29,7 +29,7 @@
 
 FROM ubuntu:14.04
 
-RUN apt-get update && apt-get install -y curl git
+RUN apt-get update && apt-get install -y curl
 
 # Install nvm
 RUN touch .profile
diff --git a/tools/dockerfile/distribtest/node_ubuntu1504_x64/Dockerfile b/tools/dockerfile/distribtest/node_ubuntu1504_x64/Dockerfile
index 013c2a0c72..55da46c3be 100644
--- a/tools/dockerfile/distribtest/node_ubuntu1504_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/node_ubuntu1504_x64/Dockerfile
@@ -29,7 +29,7 @@
 
 FROM ubuntu:15.04
 
-RUN apt-get update && apt-get install -y curl git
+RUN apt-get update && apt-get install -y curl
 
 # Install nvm
 RUN touch .profile
diff --git a/tools/dockerfile/distribtest/node_ubuntu1510_x64/Dockerfile b/tools/dockerfile/distribtest/node_ubuntu1510_x64/Dockerfile
index 43b3ae2738..c050cab7d3 100644
--- a/tools/dockerfile/distribtest/node_ubuntu1510_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/node_ubuntu1510_x64/Dockerfile
@@ -29,7 +29,7 @@
 
 FROM ubuntu:15.10
 
-RUN apt-get update && apt-get install -y curl git
+RUN apt-get update && apt-get install -y curl
 
 # Install nvm
 RUN touch .profile
diff --git a/tools/dockerfile/distribtest/node_ubuntu1604_x64/Dockerfile b/tools/dockerfile/distribtest/node_ubuntu1604_x64/Dockerfile
index 3eae75475c..ab9e8a32e3 100644
--- a/tools/dockerfile/distribtest/node_ubuntu1604_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/node_ubuntu1604_x64/Dockerfile
@@ -29,7 +29,7 @@
 
 FROM ubuntu:16.04
 
-RUN apt-get update && apt-get install -y curl git
+RUN apt-get update && apt-get install -y curl
 
 # Install nvm
 RUN touch .profile
diff --git a/tools/dockerfile/distribtest/python_arch_x64/Dockerfile b/tools/dockerfile/distribtest/python_arch_x64/Dockerfile
index 4d10e240c6..c4f2431080 100644
--- a/tools/dockerfile/distribtest/python_arch_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_arch_x64/Dockerfile
@@ -30,7 +30,7 @@
 FROM base/archlinux
 
 RUN pacman --noconfirm -Syy
-RUN pacman --noconfirm -S git
-RUN pacman --noconfirm -S python
-RUN pacman --noconfirm -S python-pip
+RUN pacman --noconfirm -S openssl
+RUN pacman --noconfirm -S python2
+RUN pacman --noconfirm -S python2-pip
 
diff --git a/tools/dockerfile/distribtest/python_centos6_x64/Dockerfile b/tools/dockerfile/distribtest/python_centos6_x64/Dockerfile
index 683686c6db..99306bb403 100644
--- a/tools/dockerfile/distribtest/python_centos6_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_centos6_x64/Dockerfile
@@ -29,9 +29,10 @@
 
 FROM centos:6
 
-RUN yum install -y git
 RUN yum install -y python
 
 RUN rpm -ivh http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
 RUN yum install -y python-pip
 
+RUN pip install --upgrade pip
+
diff --git a/tools/dockerfile/distribtest/python_centos7_x64/Dockerfile b/tools/dockerfile/distribtest/python_centos7_x64/Dockerfile
index 6b70f65f10..114957b573 100644
--- a/tools/dockerfile/distribtest/python_centos7_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_centos7_x64/Dockerfile
@@ -29,7 +29,6 @@
 
 FROM centos:7
 
-RUN yum install -y git
 RUN yum install -y python
 RUN yum install -y epel-release
 RUN yum install -y python-pip
diff --git a/tools/dockerfile/distribtest/python_fedora20_x64/Dockerfile b/tools/dockerfile/distribtest/python_fedora20_x64/Dockerfile
index 1c91594363..d58036410f 100644
--- a/tools/dockerfile/distribtest/python_fedora20_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_fedora20_x64/Dockerfile
@@ -29,9 +29,4 @@
 
 FROM fedora:20
 
-RUN yum clean all
-RUN yum update -y
-RUN yum install -y git
-RUN yum install -y python
-RUN yum install -y python-pip
-
+RUN yum clean all && yum update -y && yum install -y python python-pip
diff --git a/tools/dockerfile/distribtest/python_fedora21_x64/Dockerfile b/tools/dockerfile/distribtest/python_fedora21_x64/Dockerfile
index e35de109ea..b44fcff7e3 100644
--- a/tools/dockerfile/distribtest/python_fedora21_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_fedora21_x64/Dockerfile
@@ -29,9 +29,4 @@
 
 FROM fedora:21
 
-RUN yum clean all
-RUN yum update -y
-RUN yum install -y git
-RUN yum install -y python
-RUN yum install -y python-pip
-
+RUN yum clean all && yum update -y && yum install -y python python-pip
diff --git a/tools/dockerfile/distribtest/python_fedora22_x64/Dockerfile b/tools/dockerfile/distribtest/python_fedora22_x64/Dockerfile
index 69c3b541d3..c6415946c3 100644
--- a/tools/dockerfile/distribtest/python_fedora22_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_fedora22_x64/Dockerfile
@@ -29,9 +29,4 @@
 
 FROM fedora:22
 
-RUN yum clean all
-RUN yum update -y
-RUN yum install -y git
-RUN yum install -y python
-RUN yum install -y python-pip
-
+RUN yum clean all && yum update -y && yum install -y python python-pip
diff --git a/tools/dockerfile/distribtest/python_fedora23_x64/Dockerfile b/tools/dockerfile/distribtest/python_fedora23_x64/Dockerfile
index 74639a3118..6c834d2bc2 100644
--- a/tools/dockerfile/distribtest/python_fedora23_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_fedora23_x64/Dockerfile
@@ -29,9 +29,4 @@
 
 FROM fedora:23
 
-RUN yum clean all
-RUN yum update -y
-RUN yum install -y git
-RUN yum install -y python
-RUN yum install -y python-pip
-
+RUN yum clean all && yum update -y && yum install -y python python-pip
diff --git a/tools/dockerfile/distribtest/python_jessie_x64/Dockerfile b/tools/dockerfile/distribtest/python_jessie_x64/Dockerfile
index 3d511e267a..5778d604c8 100644
--- a/tools/dockerfile/distribtest/python_jessie_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_jessie_x64/Dockerfile
@@ -29,6 +29,4 @@
 
 FROM debian:jessie
 
-RUN apt-get update
-RUN apt-get install -y git python python-pip
-
+RUN apt-get update && apt-get install -y python python-pip
diff --git a/tools/dockerfile/distribtest/python_jessie_x86/Dockerfile b/tools/dockerfile/distribtest/python_jessie_x86/Dockerfile
index 035d56b655..e9cf99142b 100644
--- a/tools/dockerfile/distribtest/python_jessie_x86/Dockerfile
+++ b/tools/dockerfile/distribtest/python_jessie_x86/Dockerfile
@@ -29,6 +29,9 @@
 
 FROM 32bit/debian:jessie
 
-RUN apt-get update
-RUN apt-get install -y git python python-pip
+RUN apt-get update && apt-get install -y python python-pip
 
+# docker is running on a 64-bit machine, so we need to
+# override "uname -m" to report i686 instead of x86_64, otherwise
+# python will choose a wrong binary package to install.
+ENTRYPOINT ["linux32"]
diff --git a/tools/dockerfile/distribtest/python_opensuse_x64/Dockerfile b/tools/dockerfile/distribtest/python_opensuse_x64/Dockerfile
index 032beb97e5..417d9e0293 100644
--- a/tools/dockerfile/distribtest/python_opensuse_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_opensuse_x64/Dockerfile
@@ -29,7 +29,5 @@
 
 FROM opensuse:42.1
 
-RUN zypper --non-interactive install git
 RUN zypper --non-interactive install python
 RUN zypper --non-interactive install python-pip
-
diff --git a/tools/dockerfile/distribtest/python_ubuntu1204_x64/Dockerfile b/tools/dockerfile/distribtest/python_ubuntu1204_x64/Dockerfile
index 9dbf90f511..a48ce0eeef 100644
--- a/tools/dockerfile/distribtest/python_ubuntu1204_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_ubuntu1204_x64/Dockerfile
@@ -29,8 +29,4 @@
 
 FROM ubuntu:12.04
 
-RUN apt-get update -y
-RUN apt-get install -y git
-RUN apt-get install -y python
-RUN apt-get install -y python-pip
-
+RUN apt-get update -y && apt-get install -y python python-pip
diff --git a/tools/dockerfile/distribtest/python_ubuntu1404_x64/Dockerfile b/tools/dockerfile/distribtest/python_ubuntu1404_x64/Dockerfile
index 3b366a9bb4..18dbfd4657 100644
--- a/tools/dockerfile/distribtest/python_ubuntu1404_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_ubuntu1404_x64/Dockerfile
@@ -29,8 +29,4 @@
 
 FROM ubuntu:14.04
 
-RUN apt-get update -y
-RUN apt-get install -y git
-RUN apt-get install -y python
-RUN apt-get install -y python-pip
-
+RUN apt-get update -y && apt-get install -y python python-pip
diff --git a/tools/dockerfile/distribtest/python_ubuntu1504_x64/Dockerfile b/tools/dockerfile/distribtest/python_ubuntu1504_x64/Dockerfile
index de90b5b7e2..444a54d14b 100644
--- a/tools/dockerfile/distribtest/python_ubuntu1504_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_ubuntu1504_x64/Dockerfile
@@ -29,8 +29,4 @@
 
 FROM ubuntu:15.04
 
-RUN apt-get update -y
-RUN apt-get install -y git
-RUN apt-get install -y python
-RUN apt-get install -y python-pip
-
+RUN apt-get update -y && apt-get install -y python python-pip
diff --git a/tools/dockerfile/distribtest/python_ubuntu1510_x64/Dockerfile b/tools/dockerfile/distribtest/python_ubuntu1510_x64/Dockerfile
index d10e04aacc..245ffb9413 100644
--- a/tools/dockerfile/distribtest/python_ubuntu1510_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_ubuntu1510_x64/Dockerfile
@@ -29,8 +29,4 @@
 
 FROM ubuntu:15.10
 
-RUN apt-get update -y
-RUN apt-get install -y git
-RUN apt-get install -y python
-RUN apt-get install -y python-pip
-
+RUN apt-get update -y && apt-get install -y python python-pip
diff --git a/tools/dockerfile/distribtest/python_ubuntu1604_x64/Dockerfile b/tools/dockerfile/distribtest/python_ubuntu1604_x64/Dockerfile
index bc56285a3d..a1ac3051ba 100644
--- a/tools/dockerfile/distribtest/python_ubuntu1604_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_ubuntu1604_x64/Dockerfile
@@ -29,8 +29,4 @@
 
 FROM ubuntu:16.04
 
-RUN apt-get update -y
-RUN apt-get install -y git
-RUN apt-get install -y python
-RUN apt-get install -y python-pip
-
+RUN apt-get update -y && apt-get install -y python python-pip
diff --git a/tools/dockerfile/distribtest/python_wheezy_x64/Dockerfile b/tools/dockerfile/distribtest/python_wheezy_x64/Dockerfile
index 895dd96747..46353b92d6 100644
--- a/tools/dockerfile/distribtest/python_wheezy_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/python_wheezy_x64/Dockerfile
@@ -29,6 +29,4 @@
 
 FROM debian:wheezy
 
-RUN apt-get update
-RUN apt-get install -y git python python-pip
-
+RUN apt-get update -y && apt-get install -y python python-pip
diff --git a/tools/dockerfile/distribtest/ruby_centos6_x64/Dockerfile b/tools/dockerfile/distribtest/ruby_centos6_x64/Dockerfile
index 28a5c4ad71..fd2cf63a59 100644
--- a/tools/dockerfile/distribtest/ruby_centos6_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_centos6_x64/Dockerfile
@@ -29,6 +29,4 @@
 
 FROM centos:6
 
-RUN yum install -y git
 RUN yum install -y ruby
-
diff --git a/tools/dockerfile/distribtest/ruby_centos7_x64/Dockerfile b/tools/dockerfile/distribtest/ruby_centos7_x64/Dockerfile
index bdc100ee1c..5bb9bd6fa6 100644
--- a/tools/dockerfile/distribtest/ruby_centos7_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_centos7_x64/Dockerfile
@@ -29,6 +29,4 @@
 
 FROM centos:7
 
-RUN yum install -y git
 RUN yum install -y ruby
-
diff --git a/tools/dockerfile/distribtest/ruby_fedora20_x64/Dockerfile b/tools/dockerfile/distribtest/ruby_fedora20_x64/Dockerfile
index 50ff0b038b..9f23be986f 100644
--- a/tools/dockerfile/distribtest/ruby_fedora20_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_fedora20_x64/Dockerfile
@@ -29,8 +29,4 @@
 
 FROM fedora:20
 
-RUN yum clean all
-RUN yum update -y
-RUN yum install -y git
-RUN yum install -y ruby
-
+RUN yum clean all && yum update -y && yum install -y ruby
diff --git a/tools/dockerfile/distribtest/ruby_fedora21_x64/Dockerfile b/tools/dockerfile/distribtest/ruby_fedora21_x64/Dockerfile
index 219ecc8b53..57106a4894 100644
--- a/tools/dockerfile/distribtest/ruby_fedora21_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_fedora21_x64/Dockerfile
@@ -29,8 +29,4 @@
 
 FROM fedora:21
 
-RUN yum clean all
-RUN yum update -y
-RUN yum install -y git
-RUN yum install -y ruby
-
+RUN yum clean all && yum update -y && yum install -y ruby
diff --git a/tools/dockerfile/distribtest/ruby_fedora22_x64/Dockerfile b/tools/dockerfile/distribtest/ruby_fedora22_x64/Dockerfile
index 49d4c7d7f8..d770177381 100644
--- a/tools/dockerfile/distribtest/ruby_fedora22_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_fedora22_x64/Dockerfile
@@ -29,8 +29,4 @@
 
 FROM fedora:22
 
-RUN yum clean all
-RUN yum update -y
-RUN yum install -y git
-RUN yum install -y ruby
-
+RUN yum clean all && yum update -y && yum install -y ruby
diff --git a/tools/dockerfile/distribtest/ruby_fedora23_x64/Dockerfile b/tools/dockerfile/distribtest/ruby_fedora23_x64/Dockerfile
index 3c5363fb63..2c9b78ed08 100644
--- a/tools/dockerfile/distribtest/ruby_fedora23_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_fedora23_x64/Dockerfile
@@ -29,8 +29,4 @@
 
 FROM fedora:23
 
-RUN yum clean all
-RUN yum update -y
-RUN yum install -y git
-RUN yum install -y ruby
-
+RUN yum clean all && yum update -y && yum install -y ruby
diff --git a/tools/dockerfile/distribtest/ruby_jessie_x64/Dockerfile b/tools/dockerfile/distribtest/ruby_jessie_x64/Dockerfile
index 6a3d7edba0..4784bd73b4 100644
--- a/tools/dockerfile/distribtest/ruby_jessie_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_jessie_x64/Dockerfile
@@ -29,7 +29,4 @@
 
 FROM debian:jessie
 
-RUN apt-get update
-RUN apt-get install -y git
-RUN apt-get install -y ruby-full
-
+RUN apt-get update && apt-get install -y ruby-full
diff --git a/tools/dockerfile/distribtest/ruby_jessie_x86/Dockerfile b/tools/dockerfile/distribtest/ruby_jessie_x86/Dockerfile
index ca3b731f56..4f649cbc03 100644
--- a/tools/dockerfile/distribtest/ruby_jessie_x86/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_jessie_x86/Dockerfile
@@ -29,7 +29,4 @@
 
 FROM 32bit/debian:jessie
 
-RUN apt-get update
-RUN apt-get install -y git
-RUN apt-get install -y ruby-full
-
+RUN apt-get update && apt-get install -y ruby-full
diff --git a/tools/dockerfile/distribtest/ruby_opensuse_x64/Dockerfile b/tools/dockerfile/distribtest/ruby_opensuse_x64/Dockerfile
index a9423042ea..a249950998 100644
--- a/tools/dockerfile/distribtest/ruby_opensuse_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_opensuse_x64/Dockerfile
@@ -29,6 +29,4 @@
 
 FROM opensuse:42.1
 
-RUN zypper --non-interactive install git
 RUN zypper --non-interactive install ruby
-
diff --git a/tools/dockerfile/distribtest/ruby_ubuntu1204_x64/Dockerfile b/tools/dockerfile/distribtest/ruby_ubuntu1204_x64/Dockerfile
index 66f17100cf..95b7702afb 100644
--- a/tools/dockerfile/distribtest/ruby_ubuntu1204_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_ubuntu1204_x64/Dockerfile
@@ -29,7 +29,4 @@
 
 FROM ubuntu:12.04
 
-RUN apt-get update -y
-RUN apt-get install -y git
-RUN apt-get install -y ruby-full
-
+RUN apt-get update -y && apt-get install -y ruby-full
diff --git a/tools/dockerfile/distribtest/ruby_ubuntu1404_x64/Dockerfile b/tools/dockerfile/distribtest/ruby_ubuntu1404_x64/Dockerfile
index dc533a5fca..66ba01d37e 100644
--- a/tools/dockerfile/distribtest/ruby_ubuntu1404_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_ubuntu1404_x64/Dockerfile
@@ -29,7 +29,4 @@
 
 FROM ubuntu:14.04
 
-RUN apt-get update -y
-RUN apt-get install -y git
-RUN apt-get install -y ruby-full
-
+RUN apt-get update -y && apt-get install -y ruby-full
diff --git a/tools/dockerfile/distribtest/ruby_ubuntu1504_x64/Dockerfile b/tools/dockerfile/distribtest/ruby_ubuntu1504_x64/Dockerfile
index 7e4f203041..81e7ca1d3c 100644
--- a/tools/dockerfile/distribtest/ruby_ubuntu1504_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_ubuntu1504_x64/Dockerfile
@@ -29,7 +29,4 @@
 
 FROM ubuntu:15.04
 
-RUN apt-get update -y
-RUN apt-get install -y git
-RUN apt-get install -y ruby-full
-
+RUN apt-get update -y && apt-get install -y ruby-full
diff --git a/tools/dockerfile/distribtest/ruby_ubuntu1510_x64/Dockerfile b/tools/dockerfile/distribtest/ruby_ubuntu1510_x64/Dockerfile
index 43ef63ec8c..37b897f0f5 100644
--- a/tools/dockerfile/distribtest/ruby_ubuntu1510_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_ubuntu1510_x64/Dockerfile
@@ -29,7 +29,4 @@
 
 FROM ubuntu:15.10
 
-RUN apt-get update -y
-RUN apt-get install -y git
-RUN apt-get install -y ruby-full
-
+RUN apt-get update -y && apt-get install -y ruby-full
diff --git a/tools/dockerfile/distribtest/ruby_ubuntu1604_x64/Dockerfile b/tools/dockerfile/distribtest/ruby_ubuntu1604_x64/Dockerfile
index 3b63976d3c..5c54b8f754 100644
--- a/tools/dockerfile/distribtest/ruby_ubuntu1604_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_ubuntu1604_x64/Dockerfile
@@ -29,7 +29,4 @@
 
 FROM ubuntu:16.04
 
-RUN apt-get update -y
-RUN apt-get install -y git
-RUN apt-get install -y ruby-full
-
+RUN apt-get update -y && apt-get install -y ruby-full
diff --git a/tools/dockerfile/distribtest/ruby_wheezy_x64/Dockerfile b/tools/dockerfile/distribtest/ruby_wheezy_x64/Dockerfile
index 1ff083d43c..2e6593c230 100644
--- a/tools/dockerfile/distribtest/ruby_wheezy_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/ruby_wheezy_x64/Dockerfile
@@ -29,7 +29,4 @@
 
 FROM debian:wheezy
 
-RUN apt-get update
-RUN apt-get install -y git
-RUN apt-get install -y ruby-full
-
+RUN apt-get update && apt-get install -y ruby-full
diff --git a/tools/jenkins/build_and_run_docker.sh b/tools/jenkins/build_and_run_docker.sh
index b77cd0aebb..92dbbc6f38 100755
--- a/tools/jenkins/build_and_run_docker.sh
+++ b/tools/jenkins/build_and_run_docker.sh
@@ -37,9 +37,6 @@ cd $(dirname $0)/../..
 git_root=$(pwd)
 cd -
 
-# Create a local branch so the child Docker script won't complain
-git branch -f jenkins-docker
-
 # Inputs
 # DOCKERFILE_DIR - Directory in which Dockerfile file is located.
 # DOCKER_RUN_SCRIPT - Script to run under docker (relative to grpc repo root)
diff --git a/tools/jenkins/build_artifacts.sh b/tools/jenkins/build_artifacts.sh
index 9af553ae48..c0acbdfb27 100755
--- a/tools/jenkins/build_artifacts.sh
+++ b/tools/jenkins/build_artifacts.sh
@@ -39,4 +39,8 @@ set -ex -o igncr || set -ex
 curr_platform="$platform"
 unset platform  # variable named 'platform' breaks the windows build
 
-python tools/run_tests/task_runner.py -f artifact $language $curr_platform $architecture
+if [ "$curr_platform" == "linux" ] && [ "$language" == "ruby" ] ; then
+  ./tools/run_tests/build_artifact_ruby.sh
+else
+  python tools/run_tests/task_runner.py -f artifact $language $curr_platform $architecture
+fi
diff --git a/tools/jenkins/docker_run.sh b/tools/jenkins/docker_run.sh
index 49553aae2f..519dc5cade 100755
--- a/tools/jenkins/docker_run.sh
+++ b/tools/jenkins/docker_run.sh
@@ -31,18 +31,24 @@
 # This script is invoked by build_docker_* inside a docker
 # container. You should never need to call this script on your own.
 
-set -e
+set -ex
 
-mkdir -p /var/local/git
-git clone --recursive "$EXTERNAL_GIT_ROOT" /var/local/git/grpc
+if [ "$RELATIVE_COPY_PATH" == "" ]
+then
+  mkdir -p /var/local/git
+  git clone --recursive "$EXTERNAL_GIT_ROOT" /var/local/git/grpc
+else
+  mkdir -p "/var/local/git/grpc/$RELATIVE_COPY_PATH"
+  cp -r "$EXTERNAL_GIT_ROOT/$RELATIVE_COPY_PATH"/* "/var/local/git/grpc/$RELATIVE_COPY_PATH"
+fi
 
 if [ -x "$(command -v rvm)" ]
 then
   rvm use ruby-2.1
 fi
 
-cd /var/local/git/grpc
-
 nvm use 4 || true
 
+cd /var/local/git/grpc
+
 $RUN_COMMAND
diff --git a/tools/jenkins/docker_run_tests.sh b/tools/jenkins/docker_run_tests.sh
index 26e5585d2d..12874386a3 100755
--- a/tools/jenkins/docker_run_tests.sh
+++ b/tools/jenkins/docker_run_tests.sh
@@ -43,8 +43,6 @@ chown `whoami` $XDG_CACHE_HOME
 mkdir -p /var/local/git
 git clone --recursive /var/local/jenkins/grpc /var/local/git/grpc
 
-nvm use 0.12 || true
-
 if [ -x "$(command -v rvm)" ]
 then
   rvm use ruby-2.1
diff --git a/tools/run_tests/build_artifact_python.sh b/tools/run_tests/build_artifact_python.sh
index 48cf390f69..835fad83e1 100755
--- a/tools/run_tests/build_artifact_python.sh
+++ b/tools/run_tests/build_artifact_python.sh
@@ -39,11 +39,13 @@ then
   pip install -rrequirements.txt
 fi
 
-GRPC_PYTHON_BUILD_WITH_CYTHON=1 ${SETARCH_CMD} python setup.py \
-    bdist_wheel \
-    sdist \
+GRPC_PYTHON_USE_CUSTOM_BDIST=0  \
+GRPC_PYTHON_BUILD_WITH_CYTHON=1 \
+${SETARCH_CMD} python setup.py  \
+    bdist_wheel                 \
+    sdist                       \
     bdist_egg_grpc_custom
 
 mkdir -p artifacts
 
-cp -r dist/* artifacts
\ No newline at end of file
+cp -r dist/* artifacts
diff --git a/tools/run_tests/build_artifact_ruby.sh b/tools/run_tests/build_artifact_ruby.sh
index 482d128be3..2d97b4068b 100755
--- a/tools/run_tests/build_artifact_ruby.sh
+++ b/tools/run_tests/build_artifact_ruby.sh
@@ -27,16 +27,40 @@
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
 set -ex
 
+SYSTEM=`uname | cut -f 1 -d_`
+
 cd $(dirname $0)/../..
+set +ex
+[[ -s /etc/profile.d/rvm.sh ]] && . /etc/profile.d/rvm.sh
+[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm"
+set -ex
+
+if [ "$SYSTEM" == "MSYS" ] ; then
+  SYSTEM=MINGW32
+fi
+if [ "$SYSTEM" == "MINGW64" ] ; then
+  SYSTEM=MINGW32
+fi
 
-${SETARCH_CMD} bundle install
+if [ "$SYSTEM" == "MINGW32" ] ; then
+  echo "Need Linux to build the Windows ruby gem."
+  exit 1
+fi
 
-${SETARCH_CMD} rake native gem
+set +ex
+rvm use default
+gem install bundler --update
+bundle install
+set -ex
+
+rake gem:native
+
+if [ "$SYSTEM" == "Darwin" ] ; then
+  rm `ls pkg/*.gem | grep -v darwin`
+fi
 
 mkdir -p artifacts
 
 cp pkg/*.gem artifacts
-
diff --git a/tools/run_tests/build_node.sh b/tools/run_tests/build_node.sh
index 8f2ab4413a..9c4af07185 100755
--- a/tools/run_tests/build_node.sh
+++ b/tools/run_tests/build_node.sh
@@ -29,8 +29,12 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+NODE_VERSION=$1
+source ~/.nvm/nvm.sh
 set -ex
 
+nvm use $NODE_VERSION
+
 CONFIG=${CONFIG:-opt}
 
 # change to grpc repo root
diff --git a/tools/run_tests/build_package_python.sh b/tools/run_tests/build_package_python.sh
new file mode 100755
index 0000000000..2511a6ae46
--- /dev/null
+++ b/tools/run_tests/build_package_python.sh
@@ -0,0 +1,43 @@
+#!/bin/bash
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set -ex
+
+cd $(dirname $0)/../..
+
+mkdir -p artifacts/
+
+# All the python packages have been built in the artifact phase already
+# and we only collect them here to deliver them to the distribtest phase.
+cp -r $EXTERNAL_GIT_ROOT/architecture={x86,x64},language=python,platform={windows,linux,macos}/artifacts/* artifacts/ || true
+
+# TODO: all the artifact builder configurations generate a grpcio-VERSION.tar.gz
+# source distribution package, and only one of them will end up
+# in the artifacts/ directory. They should be all equivalent though.
diff --git a/tools/run_tests/build_package_ruby.sh b/tools/run_tests/build_package_ruby.sh
new file mode 100755
index 0000000000..1a5b94348d
--- /dev/null
+++ b/tools/run_tests/build_package_ruby.sh
@@ -0,0 +1,43 @@
+#!/bin/bash
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set -ex
+
+cd $(dirname $0)/../..
+
+mkdir -p artifacts/
+
+# All the ruby packages have been built in the artifact phase already
+# and we only collect them here to deliver them to the distribtest phase.
+cp -r $EXTERNAL_GIT_ROOT/architecture={x86,x64},language=ruby,platform={windows,linux,macos}/artifacts/* artifacts/ || true
+
+# TODO: all the artifact builder configurations generate a grpc-VERSION.gem
+# source distribution package, and only one of them will end up
+# in the artifacts/ directory. They should be all equivalent though.
diff --git a/tools/run_tests/distribtest_targets.py b/tools/run_tests/distribtest_targets.py
index e9a80d2cf4..fc7dd17145 100644
--- a/tools/run_tests/distribtest_targets.py
+++ b/tools/run_tests/distribtest_targets.py
@@ -38,6 +38,7 @@ def create_docker_jobspec(name, dockerfile_dir, shell_command, environ={},
   """Creates jobspec for a task running under docker."""
   environ = environ.copy()
   environ['RUN_COMMAND'] = shell_command
+  environ['RELATIVE_COPY_PATH'] = 'test/distrib'
 
   docker_args=[]
   for k,v in environ.iteritems():
@@ -54,28 +55,49 @@ def create_docker_jobspec(name, dockerfile_dir, shell_command, environ={},
   return jobspec
 
 
+def create_jobspec(name, cmdline, environ=None, shell=False,
+                   flake_retries=0, timeout_retries=0):
+  """Creates jobspec."""
+  jobspec = jobset.JobSpec(
+          cmdline=cmdline,
+          environ=environ,
+          shortname='distribtest.%s' % (name),
+          timeout_seconds=10*60,
+          flake_retries=flake_retries,
+          timeout_retries=timeout_retries,
+          shell=shell)
+  return jobspec
+
+
 class CSharpDistribTest(object):
   """Tests C# NuGet package"""
 
-  def __init__(self, platform, arch, docker_suffix):
-    self.name = 'csharp_nuget_%s_%s_%s' % (platform, arch, docker_suffix)
+  def __init__(self, platform, arch, docker_suffix=None):
+    self.name = 'csharp_nuget_%s_%s' % (platform, arch)
     self.platform = platform
     self.arch = arch
     self.docker_suffix = docker_suffix
-    self.labels = ['distribtest', 'csharp', platform, arch, docker_suffix]
+    self.labels = ['distribtest', 'csharp', platform, arch]
+    if docker_suffix:
+      self.name += '_%s' % docker_suffix
+      self.labels.append(docker_suffix)
 
   def pre_build_jobspecs(self):
     return []
 
   def build_jobspec(self):
-    if not self.platform == 'linux':
-      raise Exception("Not supported yet.")
-
-    return create_docker_jobspec(self.name,
+    if self.platform == 'linux':
+      return create_docker_jobspec(self.name,
           'tools/dockerfile/distribtest/csharp_%s_%s' % (
               self.docker_suffix,
               self.arch),
           'test/distrib/csharp/run_distrib_test.sh')
+    elif self.platform == 'macos':
+      return create_jobspec(self.name,
+          ['test/distrib/csharp/run_distrib_test.sh'],
+          environ={'EXTERNAL_GIT_ROOT': '../../..'})
+    else:
+      raise Exception("Not supported yet.")
 
   def __str__(self):
     return self.name
@@ -104,8 +126,7 @@ class NodeDistribTest(object):
                                  'tools/dockerfile/distribtest/node_%s_%s' % (
                                      self.docker_suffix,
                                      self.arch),
-                                 # bash -l needed to make nvm available
-                                 'bash -l test/distrib/node/run_distrib_test.sh %s' % (
+                                 'test/distrib/node/run_distrib_test.sh %s' % (
                                      self.node_version))
     def __str__(self):
       return self.name
@@ -175,6 +196,7 @@ def targets():
           CSharpDistribTest('linux', 'x64', 'ubuntu1504'),
           CSharpDistribTest('linux', 'x64', 'ubuntu1510'),
           CSharpDistribTest('linux', 'x64', 'ubuntu1604'),
+          CSharpDistribTest('macos', 'x86'),
           PythonDistribTest('linux', 'x64', 'wheezy'),
           PythonDistribTest('linux', 'x64', 'jessie'),
           PythonDistribTest('linux', 'x86', 'jessie'),
diff --git a/tools/run_tests/interop_html_report.template b/tools/run_tests/interop_html_report.template
index 114a508c31..46cce426b7 100644
--- a/tools/run_tests/interop_html_report.template
+++ b/tools/run_tests/interop_html_report.template
@@ -64,17 +64,8 @@
   % endif
 </%def>
 
-% if num_failures > 1:
-  <p><h2><font color="red">${num_failures} tests failed!</font></h2></p>
-% elif num_failures:
-  <p><h2><font color="red">${num_failures} test failed!</font></h2></p>
-% else:
-  <p><h2><font color="green">All tests passed!</font></h2></p>
-% endif
-
-% if cloud_to_prod:
+<%def name="display_cloud_to_prod_result(prod_server)">
   ## Each column header is the client language.
-  <h2>Cloud to Prod</h2>
   <table style="width:100%" border="1">
   <tr bgcolor="#00BFFF">
   <th>Client languages &#9658;<br/>Test Cases &#9660;</th>
@@ -87,15 +78,32 @@
     % for client_lang in client_langs:
       <% 
         if test_case in auth_test_cases:
-          shortname = 'cloud_to_prod_auth:%s:%s' % (client_lang, test_case)
+          shortname = 'cloud_to_prod_auth:%s:%s:%s' % (
+              prod_server, client_lang, test_case)
         else:
-          shortname = 'cloud_to_prod:%s:%s' % (client_lang, test_case)
+          shortname = 'cloud_to_prod:%s:%s:%s' % (
+              prod_server, client_lang, test_case)
       %>
       ${fill_one_test_result(shortname, resultset)}
     % endfor
     </tr> 
   % endfor
   </table>
+</%def>
+
+% if num_failures > 1:
+  <p><h2><font color="red">${num_failures} tests failed!</font></h2></p>
+% elif num_failures:
+  <p><h2><font color="red">${num_failures} test failed!</font></h2></p>
+% else:
+  <p><h2><font color="green">All tests passed!</font></h2></p>
+% endif
+
+% if cloud_to_prod:
+  % for prod_server in prod_servers:
+    <h2>Cloud to ${prod_server}</h2>
+    ${display_cloud_to_prod_result(prod_server)}
+  % endfor
 % endif
 
 % if http2_interop:
@@ -108,7 +116,9 @@
     <th>${server_lang}</th>
   % endfor
   % if cloud_to_prod:
-    <th>prod</th>
+    % for prod_server in prod_servers:
+      <th>${prod_server}</th>
+    % endfor
   % endif
   </tr>
   % for test_case in http2_cases:
@@ -122,8 +132,10 @@
       ${fill_one_http2_test_result(shortname, resultset)}
     % endfor
     % if cloud_to_prod:
-      <% shortname = 'cloud_to_prod:http2:%s' % test_case %>
-      ${fill_one_http2_test_result(shortname, resultset)}
+      % for prod_server in prod_servers:
+        <% shortname = 'cloud_to_prod:%s:http2:%s' % (prod_server, test_case) %>
+        ${fill_one_http2_test_result(shortname, resultset)}
+      % endfor
     % endif
     </tr>
   % endfor
diff --git a/tools/run_tests/package_targets.py b/tools/run_tests/package_targets.py
index 997bc57cc5..4ca8279f1b 100644
--- a/tools/run_tests/package_targets.py
+++ b/tools/run_tests/package_targets.py
@@ -68,11 +68,11 @@ def create_jobspec(name, cmdline, environ=None, cwd=None, shell=False,
   return jobspec
 
 
-class CSharpNugetTarget:
+class CSharpPackage:
   """Builds C# nuget packages."""
 
   def __init__(self):
-    self.name = 'csharp_nuget'
+    self.name = 'csharp_package'
     self.labels = ['package', 'csharp', 'windows']
 
   def pre_build_jobspecs(self):
@@ -87,11 +87,12 @@ class CSharpNugetTarget:
   def __str__(self):
     return self.name
 
-class NodeNpmBinaryTarget:
-  """Builds Node NPM package and collects binaries"""
+
+class NodePackage:
+  """Builds Node NPM package and collects precompiled binaries"""
 
   def __init__(self):
-    self.name = 'node_npm_binary'
+    self.name = 'node_package'
     self.labels = ['package', 'node', 'linux']
 
   def pre_build_jobspecs(self):
@@ -103,6 +104,44 @@ class NodeNpmBinaryTarget:
         'tools/dockerfile/grpc_artifact_linux_x64',
         'tools/run_tests/build_package_node.sh')
 
+
+class RubyPackage:
+  """Collects ruby gems created in the artifact phase"""
+
+  def __init__(self):
+    self.name = 'ruby_package'
+    self.labels = ['package', 'ruby', 'linux']
+
+  def pre_build_jobspecs(self):
+    return []
+
+  def build_jobspec(self):
+    return create_docker_jobspec(
+        self.name,
+        'tools/dockerfile/grpc_artifact_linux_x64',
+        'tools/run_tests/build_package_ruby.sh')
+
+
+class PythonPackage:
+  """Collects python eggs and wheels created in the artifact phase"""
+
+  def __init__(self):
+    self.name = 'python_package'
+    self.labels = ['package', 'python', 'linux']
+
+  def pre_build_jobspecs(self):
+    return []
+
+  def build_jobspec(self):
+    return create_docker_jobspec(
+        self.name,
+        'tools/dockerfile/grpc_artifact_linux_x64',
+        'tools/run_tests/build_package_python.sh')
+
+
 def targets():
   """Gets list of supported targets"""
-  return [CSharpNugetTarget(), NodeNpmBinaryTarget()]
+  return [CSharpPackage(),
+          NodePackage(),
+          RubyPackage(),
+          PythonPackage()]
diff --git a/tools/run_tests/pre_build_node.sh b/tools/run_tests/pre_build_node.sh
index 28ce354f27..11f46d60fc 100755
--- a/tools/run_tests/pre_build_node.sh
+++ b/tools/run_tests/pre_build_node.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -29,8 +29,12 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+NODE_VERSION=$1
+source ~/.nvm/nvm.sh
 set -ex
 
+nvm use $NODE_VERSION
+
 export GRPC_CONFIG=${CONFIG:-opt}
 
 # Expire cache after 1 week
diff --git a/tools/run_tests/report_utils.py b/tools/run_tests/report_utils.py
index 35f2069bee..0032a98523 100644
--- a/tools/run_tests/report_utils.py
+++ b/tools/run_tests/report_utils.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -77,7 +77,7 @@ def render_junit_xml_report(resultset, xml_report):
 
 def render_interop_html_report(
   client_langs, server_langs, test_cases, auth_test_cases, http2_cases, 
-  resultset, num_failures, cloud_to_prod, http2_interop):
+  resultset, num_failures, cloud_to_prod, prod_servers, http2_interop):
   """Generate HTML report for interop tests."""
   template_file = 'tools/run_tests/interop_html_report.template'
   try:
@@ -94,6 +94,7 @@ def render_interop_html_report(
   sorted_http2_cases = sorted(http2_cases)
   sorted_client_langs = sorted(client_langs)
   sorted_server_langs = sorted(server_langs)
+  sorted_prod_servers = sorted(prod_servers)
 
   args = {'client_langs': sorted_client_langs, 
           'server_langs': sorted_server_langs,
@@ -103,6 +104,7 @@ def render_interop_html_report(
           'resultset': resultset,
           'num_failures': num_failures,
           'cloud_to_prod': cloud_to_prod,
+          'prod_servers': sorted_prod_servers,
           'http2_interop': http2_interop}
 
   html_report_out_dir = 'reports' 
diff --git a/tools/run_tests/run_interop_tests.py b/tools/run_tests/run_interop_tests.py
index fbc3b3cdf6..4a670e0c9d 100755
--- a/tools/run_tests/run_interop_tests.py
+++ b/tools/run_tests/run_interop_tests.py
@@ -422,12 +422,13 @@ def _job_kill_handler(job):
     time.sleep(2)
 
 
-def cloud_to_prod_jobspec(language, test_case, docker_image=None, auth=False):
+def cloud_to_prod_jobspec(language, test_case, server_host_name, 
+                          server_host_detail, docker_image=None, auth=False):
   """Creates jobspec for cloud-to-prod interop test"""
   container_name = None
   cmdargs = [
-      '--server_host_override=grpc-test.sandbox.googleapis.com',
-      '--server_host=grpc-test.sandbox.googleapis.com',
+      '--server_host=%s' % server_host_detail[0],
+      '--server_host_override=%s' % server_host_detail[1],
       '--server_port=443',
       '--use_tls=true',
       '--test_case=%s' % test_case]
@@ -440,7 +441,8 @@ def cloud_to_prod_jobspec(language, test_case, docker_image=None, auth=False):
   cwd = language.client_cwd
 
   if docker_image:
-    container_name = dockerjob.random_name('interop_client_%s' % language.safename)
+    container_name = dockerjob.random_name('interop_client_%s' % 
+                                           language.safename)
     cmdline = docker_run_cmdline(cmdline,
                                  image=docker_image,
                                  cwd=cwd,
@@ -455,7 +457,8 @@ def cloud_to_prod_jobspec(language, test_case, docker_image=None, auth=False):
           cmdline=cmdline,
           cwd=cwd,
           environ=environ,
-          shortname='%s:%s:%s' % (suite_name, language, test_case),
+          shortname='%s:%s:%s:%s' % (suite_name, server_host_name, language, 
+                                     test_case),
           timeout_seconds=90,
           flake_retries=5 if args.allow_flakes else 0,
           timeout_retries=2 if args.allow_flakes else 0,
@@ -491,7 +494,7 @@ def cloud_to_cloud_jobspec(language, test_case, server_name, server_host,
           cwd=cwd,
           environ=environ,
           shortname='cloud_to_cloud:%s:%s_server:%s' % (language, server_name,
-                                                 test_case),
+                                                        test_case),
           timeout_seconds=90,
           flake_retries=5 if args.allow_flakes else 0,
           timeout_retries=2 if args.allow_flakes else 0,
@@ -572,6 +575,21 @@ def aggregate_http2_results(stdout):
     'percent': 1.0 * passed / (passed + failed)
   }
 
+# A dictionary of prod servers to test. 
+# Format: server_name: (server_host, server_host_override, errors_allowed)
+# TODO(adelez): implement logic for errors_allowed where if the indicated tests
+# fail, they don't impact the overall test result.
+prod_servers = {
+    'default': ('grpc-test.sandbox.googleapis.com', 
+                'grpc-test.sandbox.googleapis.com', False),
+    'gateway_v2': ('grpc-test2.sandbox.googleapis.com', 
+                   'grpc-test2.sandbox.googleapis.com', True),
+    'cloud_gateway': ('216.239.32.255', 'grpc-test.sandbox.googleapis.com', 
+                      False),
+    'cloud_gateway_v2': ('216.239.32.255', 'grpc-test2.sandbox.googleapis.com', 
+                         True)
+}
+
 argp = argparse.ArgumentParser(description='Run interop tests.')
 argp.add_argument('-l', '--language',
                   choices=['all'] + sorted(_LANGUAGES),
@@ -589,6 +607,12 @@ argp.add_argument('--cloud_to_prod_auth',
                   action='store_const',
                   const=True,
                   help='Run cloud_to_prod_auth tests.')
+argp.add_argument('--prod_servers',
+                  choices=prod_servers.keys(),
+                  default=['default'],
+                  nargs='+',
+                  help=('The servers to run cloud_to_prod and '
+                        'cloud_to_prod_auth tests against.'))
 argp.add_argument('-s', '--server',
                   choices=['all'] + sorted(_SERVERS),
                   action='append',
@@ -688,32 +712,37 @@ try:
     server_jobs[lang] = job
     server_addresses[lang] = ('localhost', job.mapped_port(_DEFAULT_SERVER_PORT))
 
-
   jobs = []
   if args.cloud_to_prod:
-    for language in languages:
-      for test_case in _TEST_CASES:
-        if not test_case in language.unimplemented_test_cases():
-          if not test_case in _SKIP_ADVANCED + _SKIP_COMPRESSION:
-            test_job = cloud_to_prod_jobspec(language, test_case,
-                                             docker_image=docker_images.get(str(language)))
-            jobs.append(test_job)
-
-    if args.http2_interop:
-      for test_case in _HTTP2_TEST_CASES:
-        test_job = cloud_to_prod_jobspec(http2Interop, test_case,
-                                         docker_image=docker_images.get(str(http2Interop)))
-        jobs.append(test_job)
-
+    for server_host_name in args.prod_servers:
+      for language in languages:
+        for test_case in _TEST_CASES:
+          if not test_case in language.unimplemented_test_cases():
+            if not test_case in _SKIP_ADVANCED + _SKIP_COMPRESSION:
+              test_job = cloud_to_prod_jobspec(
+                  language, test_case, server_host_name, 
+                  prod_servers[server_host_name],
+                  docker_image=docker_images.get(str(language)))
+              jobs.append(test_job)
+
+      if args.http2_interop:
+        for test_case in _HTTP2_TEST_CASES:
+          test_job = cloud_to_prod_jobspec(
+              http2Interop, test_case, server_host_name, 
+              prod_servers[server_host_name],
+              docker_image=docker_images.get(str(http2Interop)))
+          jobs.append(test_job)
 
   if args.cloud_to_prod_auth:
-    for language in languages:
-      for test_case in _AUTH_TEST_CASES:
-        if not test_case in language.unimplemented_test_cases():
-          test_job = cloud_to_prod_jobspec(language, test_case,
-                                           docker_image=docker_images.get(str(language)),
-                                           auth=True)
-          jobs.append(test_job)
+    for server_host_name in args.prod_servers:
+      for language in languages:
+        for test_case in _AUTH_TEST_CASES:
+          if not test_case in language.unimplemented_test_cases():
+            test_job = cloud_to_prod_jobspec(
+                language, test_case, server_host_name, 
+                prod_servers[server_host_name],
+                docker_image=docker_images.get(str(language)), auth=True)
+            jobs.append(test_job)
 
   for server in args.override_server:
     server_name = server[0]
@@ -773,7 +802,8 @@ try:
   report_utils.render_interop_html_report(
       set([str(l) for l in languages]), servers, _TEST_CASES, _AUTH_TEST_CASES,
       _HTTP2_TEST_CASES, resultset, num_failures,
-      args.cloud_to_prod_auth or args.cloud_to_prod, args.http2_interop)
+      args.cloud_to_prod_auth or args.cloud_to_prod, args.prod_servers, 
+      args.http2_interop)
 
 finally:
   # Check if servers are still running.
diff --git a/tools/run_tests/run_node.sh b/tools/run_tests/run_node.sh
index f93c9c30cb..40f61d77cc 100755
--- a/tools/run_tests/run_node.sh
+++ b/tools/run_tests/run_node.sh
@@ -28,8 +28,12 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+NODE_VERSION=$1
+source ~/.nvm/nvm.sh
 set -ex
 
+nvm use $NODE_VERSION
+
 CONFIG=${CONFIG:-opt}
 
 # change to grpc repo root
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 9e7b97c6a2..6dfdc705be 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -194,13 +194,17 @@ class CLanguage(object):
 
 class NodeLanguage(object):
 
+  def __init__(self):
+    self.node_version = '0.12'
+
   def test_specs(self, config, args):
-    return [config.job_spec(['tools/run_tests/run_node.sh'], None,
+    return [config.job_spec(['tools/run_tests/run_node.sh', self.node_version],
+                            None,
                             environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
 
   def pre_build_steps(self):
     # Default to 1 week cache expiration
-    return [['tools/run_tests/pre_build_node.sh']]
+    return [['tools/run_tests/pre_build_node.sh', self.node_version]]
 
   def make_targets(self, test_regex):
     return []
@@ -209,7 +213,7 @@ class NodeLanguage(object):
     return []
 
   def build_steps(self):
-    return [['tools/run_tests/build_node.sh']]
+    return [['tools/run_tests/build_node.sh', self.node_version]]
 
   def post_tests_steps(self):
     return []