diff --git a/synthtool/gcp/templates/node_library/.kokoro/common.cfg b/synthtool/gcp/templates/node_library/.kokoro/common.cfg
index 5f0d486e6..5072f652e 100644
--- a/synthtool/gcp/templates/node_library/.kokoro/common.cfg
+++ b/synthtool/gcp/templates/node_library/.kokoro/common.cfg
@@ -11,7 +11,7 @@ action {
 gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
 
 # Use the trampoline script to run in docker.
-build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline.sh"
+build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline_v2.sh"
 
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
diff --git a/synthtool/gcp/templates/node_library/.kokoro/continuous/node10/common.cfg b/synthtool/gcp/templates/node_library/.kokoro/continuous/node10/common.cfg
index f4913bd3f..b4040a16e 100644
--- a/synthtool/gcp/templates/node_library/.kokoro/continuous/node10/common.cfg
+++ b/synthtool/gcp/templates/node_library/.kokoro/continuous/node10/common.cfg
@@ -21,7 +21,7 @@ before_action {
 gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
 
 # Use the trampoline script to run in docker.
-build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline.sh"
+build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline_v2.sh"
 
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
diff --git a/synthtool/gcp/templates/node_library/.kokoro/continuous/node12/common.cfg b/synthtool/gcp/templates/node_library/.kokoro/continuous/node12/common.cfg
index 01c4845e1..0df7d844b 100644
--- a/synthtool/gcp/templates/node_library/.kokoro/continuous/node12/common.cfg
+++ b/synthtool/gcp/templates/node_library/.kokoro/continuous/node12/common.cfg
@@ -11,7 +11,7 @@ action {
 gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
 
 # Use the trampoline script to run in docker.
-build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline.sh"
+build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline_v2.sh"
 
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
diff --git a/synthtool/gcp/templates/node_library/.kokoro/docs.sh b/synthtool/gcp/templates/node_library/.kokoro/docs.sh
index 952403fae..85901242b 100755
--- a/synthtool/gcp/templates/node_library/.kokoro/docs.sh
+++ b/synthtool/gcp/templates/node_library/.kokoro/docs.sh
@@ -16,7 +16,7 @@
 
 set -eo pipefail
 
-export NPM_CONFIG_PREFIX=/home/node/.npm-global
+export NPM_CONFIG_PREFIX=${HOME}/.npm-global
 
 cd $(dirname $0)/..
 
diff --git a/synthtool/gcp/templates/node_library/.kokoro/lint.sh b/synthtool/gcp/templates/node_library/.kokoro/lint.sh
index b03cb0439..aef4866e4 100755
--- a/synthtool/gcp/templates/node_library/.kokoro/lint.sh
+++ b/synthtool/gcp/templates/node_library/.kokoro/lint.sh
@@ -16,7 +16,7 @@
 
 set -eo pipefail
 
-export NPM_CONFIG_PREFIX=/home/node/.npm-global
+export NPM_CONFIG_PREFIX=${HOME}/.npm-global
 
 cd $(dirname $0)/..
 
diff --git a/synthtool/gcp/templates/node_library/.kokoro/populate-secrets.sh b/synthtool/gcp/templates/node_library/.kokoro/populate-secrets.sh
index 6f9d22885..deb2b199e 100755
--- a/synthtool/gcp/templates/node_library/.kokoro/populate-secrets.sh
+++ b/synthtool/gcp/templates/node_library/.kokoro/populate-secrets.sh
@@ -13,31 +13,64 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# This file is called in the early stage of `trampoline_v2.sh` to
+# populate secrets needed for the CI builds.
+
 set -eo pipefail
 
 function now { date +"%Y-%m-%d %H:%M:%S" | tr -d '\n' ;}
 function msg { println "$*" >&2 ;}
 function println { printf '%s\n' "$(now) $*" ;}
 
+# Populates requested secrets set in SECRET_MANAGER_KEYS
+
+# In Kokoro CI builds, we use the service account attached to the
+# Kokoro VM. This means we need to setup auth on other CI systems.
+# For local run, we just use the gcloud command for retrieving the
+# secrets.
+
+if [[ "${RUNNING_IN_CI:-}" == "true" ]]; then
+    GCLOUD_COMMANDS=(
+	"docker"
+	"run"
+	"--entrypoint=gcloud"
+	"--volume=${KOKORO_GFILE_DIR}:${KOKORO_GFILE_DIR}"
+	"gcr.io/google.com/cloudsdktool/cloud-sdk"
+    )
+    if [[ "${TRAMPOLINE_CI:-}" == "kokoro" ]]; then
+	SECRET_LOCATION="${KOKORO_GFILE_DIR}/secret_manager"
+    else
+	echo "Authentication for this CI system is not implemented yet."
+	exit 2
+	# TODO: Determine appropriate SECRET_LOCATION and the GCLOUD_COMMANDS.
+    fi
+else
+    # For local run, use /dev/shm or temporary directory for
+    # KOKORO_GFILE_DIR.
+    if [[ -d "/dev/shm" ]]; then
+	export KOKORO_GFILE_DIR=/dev/shm
+    else
+	export KOKORO_GFILE_DIR=$(mktemp -d -t ci-XXXXXXXX)
+    fi
+    SECRET_LOCATION="${KOKORO_GFILE_DIR}/secret_manager"
+    GCLOUD_COMMANDS=("gcloud")
+fi
 
-# Populates requested secrets set in SECRET_MANAGER_KEYS from service account:
-# kokoro-trampoline@cloud-devrel-kokoro-resources.iam.gserviceaccount.com
-SECRET_LOCATION="${KOKORO_GFILE_DIR}/secret_manager"
 msg "Creating folder on disk for secrets: ${SECRET_LOCATION}"
 mkdir -p ${SECRET_LOCATION}
+
 for key in $(echo ${SECRET_MANAGER_KEYS} | sed "s/,/ /g")
 do
-  msg "Retrieving secret ${key}"
-  docker run --entrypoint=gcloud \
-    --volume=${KOKORO_GFILE_DIR}:${KOKORO_GFILE_DIR} \
-    gcr.io/google.com/cloudsdktool/cloud-sdk \
-    secrets versions access latest \
-    --project cloud-devrel-kokoro-resources \
-    --secret $key > \
-    "$SECRET_LOCATION/$key"
-  if [[ $? == 0 ]]; then
-    msg "Secret written to ${SECRET_LOCATION}/${key}"
-  else
-    msg "Error retrieving secret ${key}"
-  fi
+    msg "Retrieving secret ${key}"
+    "${GCLOUD_COMMANDS[@]}" \
+	secrets versions access latest \
+	--project cloud-devrel-kokoro-resources \
+	--secret $key > \
+	"$SECRET_LOCATION/$key"
+    if [[ $? == 0 ]]; then
+	msg "Secret written to ${SECRET_LOCATION}/${key}"
+    else
+	msg "Error retrieving secret ${key}"
+	exit 2
+    fi
 done
diff --git a/synthtool/gcp/templates/node_library/.kokoro/presubmit/node10/common.cfg b/synthtool/gcp/templates/node_library/.kokoro/presubmit/node10/common.cfg
index f4913bd3f..b4040a16e 100644
--- a/synthtool/gcp/templates/node_library/.kokoro/presubmit/node10/common.cfg
+++ b/synthtool/gcp/templates/node_library/.kokoro/presubmit/node10/common.cfg
@@ -21,7 +21,7 @@ before_action {
 gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
 
 # Use the trampoline script to run in docker.
-build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline.sh"
+build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline_v2.sh"
 
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
diff --git a/synthtool/gcp/templates/node_library/.kokoro/presubmit/node12/common.cfg b/synthtool/gcp/templates/node_library/.kokoro/presubmit/node12/common.cfg
index 01c4845e1..0df7d844b 100644
--- a/synthtool/gcp/templates/node_library/.kokoro/presubmit/node12/common.cfg
+++ b/synthtool/gcp/templates/node_library/.kokoro/presubmit/node12/common.cfg
@@ -11,7 +11,7 @@ action {
 gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
 
 # Use the trampoline script to run in docker.
-build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline.sh"
+build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline_v2.sh"
 
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
diff --git a/synthtool/gcp/templates/node_library/.kokoro/publish.sh b/synthtool/gcp/templates/node_library/.kokoro/publish.sh
index f056d8617..4db6bf1c7 100755
--- a/synthtool/gcp/templates/node_library/.kokoro/publish.sh
+++ b/synthtool/gcp/templates/node_library/.kokoro/publish.sh
@@ -16,7 +16,7 @@
 
 set -eo pipefail
 
-export NPM_CONFIG_PREFIX=/home/node/.npm-global
+export NPM_CONFIG_PREFIX=${HOME}/.npm-global
 
 # Start the releasetool reporter
 python3 -m pip install gcp-releasetool
diff --git a/synthtool/gcp/templates/node_library/.kokoro/release/docs-devsite.cfg b/synthtool/gcp/templates/node_library/.kokoro/release/docs-devsite.cfg
index a3898e306..dff2abe1f 100644
--- a/synthtool/gcp/templates/node_library/.kokoro/release/docs-devsite.cfg
+++ b/synthtool/gcp/templates/node_library/.kokoro/release/docs-devsite.cfg
@@ -18,7 +18,7 @@ env_vars: {
 gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
 
 # Use the trampoline script to run in docker.
-build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline.sh"
+build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline_v2.sh"
 
 env_vars: {
     key: "TRAMPOLINE_BUILD_FILE"
diff --git a/synthtool/gcp/templates/node_library/.kokoro/release/docs-devsite.sh b/synthtool/gcp/templates/node_library/.kokoro/release/docs-devsite.sh
index 458fe4f90..0d11b7ae9 100755
--- a/synthtool/gcp/templates/node_library/.kokoro/release/docs-devsite.sh
+++ b/synthtool/gcp/templates/node_library/.kokoro/release/docs-devsite.sh
@@ -20,8 +20,8 @@ set -eo pipefail
 if [[ -z "$CREDENTIALS" ]]; then
   # if CREDENTIALS are explicitly set, assume we're testing locally
   # and don't set NPM_CONFIG_PREFIX.
-  export NPM_CONFIG_PREFIX=/home/node/.npm-global
-  export PATH="$PATH:/home/node/.npm-global/bin"
+  export NPM_CONFIG_PREFIX=${HOME}/.npm-global
+  export PATH="$PATH:${NPM_CONFIG_PREFIX}/bin"
   cd $(dirname $0)/../..
 fi
 
diff --git a/synthtool/gcp/templates/node_library/.kokoro/release/docs.cfg b/synthtool/gcp/templates/node_library/.kokoro/release/docs.cfg
index d04749f59..4c2a59419 100644
--- a/synthtool/gcp/templates/node_library/.kokoro/release/docs.cfg
+++ b/synthtool/gcp/templates/node_library/.kokoro/release/docs.cfg
@@ -18,7 +18,7 @@ env_vars: {
 gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
 
 # Use the trampoline script to run in docker.
-build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline.sh"
+build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline_v2.sh"
 
 env_vars: {
     key: "TRAMPOLINE_BUILD_FILE"
diff --git a/synthtool/gcp/templates/node_library/.kokoro/release/docs.sh b/synthtool/gcp/templates/node_library/.kokoro/release/docs.sh
index 4d3a08685..4c866c860 100755
--- a/synthtool/gcp/templates/node_library/.kokoro/release/docs.sh
+++ b/synthtool/gcp/templates/node_library/.kokoro/release/docs.sh
@@ -20,8 +20,8 @@ set -eo pipefail
 if [[ -z "$CREDENTIALS" ]]; then
   # if CREDENTIALS are explicitly set, assume we're testing locally
   # and don't set NPM_CONFIG_PREFIX.
-  export NPM_CONFIG_PREFIX=/home/node/.npm-global
-  export PATH="$PATH:/home/node/.npm-global/bin"
+  export NPM_CONFIG_PREFIX=${HOME}/.npm-global
+  export PATH="$PATH:${NPM_CONFIG_PREFIX}/bin"
   cd $(dirname $0)/../..
 fi
 npm install
diff --git a/synthtool/gcp/templates/node_library/.kokoro/release/publish.cfg b/synthtool/gcp/templates/node_library/.kokoro/release/publish.cfg
index 8f8dd6492..f0529d753 100644
--- a/synthtool/gcp/templates/node_library/.kokoro/release/publish.cfg
+++ b/synthtool/gcp/templates/node_library/.kokoro/release/publish.cfg
@@ -27,7 +27,7 @@ before_action {
   }
 }
 
-# Fetch magictoken to use with Magic Github Proxy 
+# Fetch magictoken to use with Magic Github Proxy
 before_action {
   fetch_keystore {
     keystore_resource {
@@ -37,7 +37,7 @@ before_action {
   }
 }
 
-# Fetch api key to use with Magic Github Proxy 
+# Fetch api key to use with Magic Github Proxy
 before_action {
   fetch_keystore {
     keystore_resource {
@@ -56,7 +56,7 @@ env_vars: {
 gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
 
 # Use the trampoline script to run in docker.
-build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline.sh"
+build_file: "{{ metadata['repository_name'] }}/.kokoro/trampoline_v2.sh"
 
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
diff --git a/synthtool/gcp/templates/node_library/.kokoro/samples-test.sh b/synthtool/gcp/templates/node_library/.kokoro/samples-test.sh
index f54f08191..b66ab1a01 100755
--- a/synthtool/gcp/templates/node_library/.kokoro/samples-test.sh
+++ b/synthtool/gcp/templates/node_library/.kokoro/samples-test.sh
@@ -16,7 +16,7 @@
 
 set -eo pipefail
 
-export NPM_CONFIG_PREFIX=/home/node/.npm-global
+export NPM_CONFIG_PREFIX=${HOME}/.npm-global
 
 # Setup service account credentials.
 export GOOGLE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/service-account.json
diff --git a/synthtool/gcp/templates/node_library/.kokoro/system-test.sh b/synthtool/gcp/templates/node_library/.kokoro/system-test.sh
index 123bbb4d1..879a9f080 100755
--- a/synthtool/gcp/templates/node_library/.kokoro/system-test.sh
+++ b/synthtool/gcp/templates/node_library/.kokoro/system-test.sh
@@ -16,7 +16,7 @@
 
 set -eo pipefail
 
-export NPM_CONFIG_PREFIX=/home/node/.npm-global
+export NPM_CONFIG_PREFIX=${HOME}/.npm-global
 
 # Setup service account credentials.
 export GOOGLE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/service-account.json
diff --git a/synthtool/gcp/templates/node_library/.kokoro/test.sh b/synthtool/gcp/templates/node_library/.kokoro/test.sh
index 47be59b98..5be385fef 100755
--- a/synthtool/gcp/templates/node_library/.kokoro/test.sh
+++ b/synthtool/gcp/templates/node_library/.kokoro/test.sh
@@ -16,7 +16,7 @@
 
 set -eo pipefail
 
-export NPM_CONFIG_PREFIX=/home/node/.npm-global
+export NPM_CONFIG_PREFIX=${HOME}/.npm-global
 
 cd $(dirname $0)/..
 
diff --git a/synthtool/gcp/templates/node_library/.kokoro/trampoline.sh b/synthtool/gcp/templates/node_library/.kokoro/trampoline.sh
index a4241db23..f693a1ce7 100755
--- a/synthtool/gcp/templates/node_library/.kokoro/trampoline.sh
+++ b/synthtool/gcp/templates/node_library/.kokoro/trampoline.sh
@@ -13,6 +13,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# This file is not used any more, but we keep this file for making it
+# easy to roll back.
+# TODO: Remove this file from the template.
+
 set -eo pipefail
 
 # Always run the cleanup script, regardless of the success of bouncing into
diff --git a/synthtool/gcp/templates/node_library/.kokoro/trampoline_v2.sh b/synthtool/gcp/templates/node_library/.kokoro/trampoline_v2.sh
new file mode 100755
index 000000000..5ae75f977
--- /dev/null
+++ b/synthtool/gcp/templates/node_library/.kokoro/trampoline_v2.sh
@@ -0,0 +1,488 @@
+#!/usr/bin/env bash
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# trampoline_v2.sh
+#
+# If you want to make a change to this file, consider doing so at:
+# https://github.com/googlecloudplatform/docker-ci-helper
+#
+# This script is for running CI builds. For Kokoro builds, we
+# set this script to `build_file` field in the Kokoro configuration.
+
+# This script does 3 things.
+#
+# 1. Prepare the Docker image for the test
+# 2. Run the Docker with appropriate flags to run the test
+# 3. Upload the newly built Docker image
+#
+# in a way that is somewhat compatible with trampoline_v1.
+#
+# These environment variables are required:
+# TRAMPOLINE_IMAGE: The docker image to use.
+# TRAMPOLINE_DOCKERFILE: The location of the Dockerfile.
+#
+# You can optionally change these environment variables:
+# TRAMPOLINE_IMAGE_UPLOAD:
+#     (true|false): Whether to upload the Docker image after the
+#                   successful builds.
+# TRAMPOLINE_BUILD_FILE: The script to run in the docker container.
+# TRAMPOLINE_WORKSPACE: The workspace path in the docker container.
+#                       Defaults to /workspace.
+# Potentially there are some repo specific envvars in .trampolinerc in
+# the project root.
+#
+# Here is an example for running this script.
+#   TRAMPOLINE_IMAGE=gcr.io/cloud-devrel-kokoro-resources/node:10-user \
+#     TRAMPOLINE_BUILD_FILE=.kokoro/system-test.sh \
+#     .kokoro/trampoline_v2.sh
+
+set -euo pipefail
+
+TRAMPOLINE_VERSION="2.0.7"
+
+if command -v tput >/dev/null && [[ -n "${TERM:-}" ]]; then
+  readonly IO_COLOR_RED="$(tput setaf 1)"
+  readonly IO_COLOR_GREEN="$(tput setaf 2)"
+  readonly IO_COLOR_YELLOW="$(tput setaf 3)"
+  readonly IO_COLOR_RESET="$(tput sgr0)"
+else
+  readonly IO_COLOR_RED=""
+  readonly IO_COLOR_GREEN=""
+  readonly IO_COLOR_YELLOW=""
+  readonly IO_COLOR_RESET=""
+fi
+
+function function_exists {
+    [ $(LC_ALL=C type -t $1)"" == "function" ]
+}
+
+# Logs a message using the given color. The first argument must be one
+# of the IO_COLOR_* variables defined above, such as
+# "${IO_COLOR_YELLOW}". The remaining arguments will be logged in the
+# given color. The log message will also have an RFC-3339 timestamp
+# prepended (in UTC). You can disable the color output by setting
+# TERM=vt100.
+function log_impl() {
+    local color="$1"
+    shift
+    local timestamp="$(date -u "+%Y-%m-%dT%H:%M:%SZ")"
+    echo "================================================================"
+    echo "${color}${timestamp}:" "$@" "${IO_COLOR_RESET}"
+    echo "================================================================"
+}
+
+# Logs the given message with normal coloring and a timestamp.
+function log() {
+  log_impl "${IO_COLOR_RESET}" "$@"
+}
+
+# Logs the given message in green with a timestamp.
+function log_green() {
+  log_impl "${IO_COLOR_GREEN}" "$@"
+}
+
+# Logs the given message in yellow with a timestamp.
+function log_yellow() {
+  log_impl "${IO_COLOR_YELLOW}" "$@"
+}
+
+# Logs the given message in red with a timestamp.
+function log_red() {
+  log_impl "${IO_COLOR_RED}" "$@"
+}
+
+readonly tmpdir=$(mktemp -d -t ci-XXXXXXXX)
+readonly tmphome="${tmpdir}/h"
+mkdir -p "${tmphome}"
+
+function cleanup() {
+    rm -rf "${tmpdir}"
+}
+trap cleanup EXIT
+
+RUNNING_IN_CI="${RUNNING_IN_CI:-false}"
+
+# The workspace in the container, defaults to /workspace.
+TRAMPOLINE_WORKSPACE="${TRAMPOLINE_WORKSPACE:-/workspace}"
+
+pass_down_envvars=(
+    # TRAMPOLINE_V2 variables.
+    # Tells scripts whether they are running as part of CI or not.
+    "RUNNING_IN_CI"
+    # Indicates which CI system we're in.
+    "TRAMPOLINE_CI"
+    # Indicates the version of the script.
+    "TRAMPOLINE_VERSION"
+)
+
+log_yellow "Building with Trampoline ${TRAMPOLINE_VERSION}"
+
+# Detect which CI systems we're in. If we're in any of the CI systems
+# we support, `RUNNING_IN_CI` will be true and `TRAMPOLINE_CI` will be
+# the name of the CI system. Both envvars will be passing down to the
+# container for telling which CI system we're in.
+if [[ -n "${KOKORO_BUILD_ID:-}" ]]; then
+    # descriptive env var for indicating it's on CI.
+    RUNNING_IN_CI="true"
+    TRAMPOLINE_CI="kokoro"
+    if [[ "${TRAMPOLINE_USE_LEGACY_SERVICE_ACCOUNT:-}" == "true" ]]; then
+	if [[ ! -f "${KOKORO_GFILE_DIR}/kokoro-trampoline.service-account.json" ]]; then
+	    log_red "${KOKORO_GFILE_DIR}/kokoro-trampoline.service-account.json does not exist. Did you forget to mount cloud-devrel-kokoro-resources/trampoline? Aborting."
+	    exit 1
+	fi
+	# This service account will be activated later.
+	TRAMPOLINE_SERVICE_ACCOUNT="${KOKORO_GFILE_DIR}/kokoro-trampoline.service-account.json"
+    else
+	if [[ "${TRAMPOLINE_VERBOSE:-}" == "true" ]]; then
+	    gcloud auth list
+	fi
+	log_yellow "Configuring Container Registry access"
+	gcloud auth configure-docker --quiet
+    fi
+    pass_down_envvars+=(
+	# KOKORO dynamic variables.
+	"KOKORO_BUILD_NUMBER"
+	"KOKORO_BUILD_ID"
+	"KOKORO_JOB_NAME"
+	"KOKORO_GIT_COMMIT"
+	"KOKORO_GITHUB_COMMIT"
+	"KOKORO_GITHUB_PULL_REQUEST_NUMBER"
+	"KOKORO_GITHUB_PULL_REQUEST_COMMIT"
+	# For Build Cop Bot
+	"KOKORO_GITHUB_COMMIT_URL"
+	"KOKORO_GITHUB_PULL_REQUEST_URL"
+    )
+elif [[ "${TRAVIS:-}" == "true" ]]; then
+    RUNNING_IN_CI="true"
+    TRAMPOLINE_CI="travis"
+    pass_down_envvars+=(
+	"TRAVIS_BRANCH"
+	"TRAVIS_BUILD_ID"
+	"TRAVIS_BUILD_NUMBER"
+	"TRAVIS_BUILD_WEB_URL"
+	"TRAVIS_COMMIT"
+	"TRAVIS_COMMIT_MESSAGE"
+	"TRAVIS_COMMIT_RANGE"
+	"TRAVIS_JOB_NAME"
+	"TRAVIS_JOB_NUMBER"
+	"TRAVIS_JOB_WEB_URL"
+	"TRAVIS_PULL_REQUEST"
+	"TRAVIS_PULL_REQUEST_BRANCH"
+	"TRAVIS_PULL_REQUEST_SHA"
+	"TRAVIS_PULL_REQUEST_SLUG"
+	"TRAVIS_REPO_SLUG"
+	"TRAVIS_SECURE_ENV_VARS"
+	"TRAVIS_TAG"
+    )
+elif [[ -n "${GITHUB_RUN_ID:-}" ]]; then
+    RUNNING_IN_CI="true"
+    TRAMPOLINE_CI="github-workflow"
+    pass_down_envvars+=(
+	"GITHUB_WORKFLOW"
+	"GITHUB_RUN_ID"
+	"GITHUB_RUN_NUMBER"
+	"GITHUB_ACTION"
+	"GITHUB_ACTIONS"
+	"GITHUB_ACTOR"
+	"GITHUB_REPOSITORY"
+	"GITHUB_EVENT_NAME"
+	"GITHUB_EVENT_PATH"
+	"GITHUB_SHA"
+	"GITHUB_REF"
+	"GITHUB_HEAD_REF"
+	"GITHUB_BASE_REF"
+    )
+elif [[ "${CIRCLECI:-}" == "true" ]]; then
+    RUNNING_IN_CI="true"
+    TRAMPOLINE_CI="circleci"
+    pass_down_envvars+=(
+	"CIRCLE_BRANCH"
+	"CIRCLE_BUILD_NUM"
+	"CIRCLE_BUILD_URL"
+	"CIRCLE_COMPARE_URL"
+	"CIRCLE_JOB"
+	"CIRCLE_NODE_INDEX"
+	"CIRCLE_NODE_TOTAL"
+	"CIRCLE_PREVIOUS_BUILD_NUM"
+	"CIRCLE_PROJECT_REPONAME"
+	"CIRCLE_PROJECT_USERNAME"
+	"CIRCLE_REPOSITORY_URL"
+	"CIRCLE_SHA1"
+	"CIRCLE_STAGE"
+	"CIRCLE_USERNAME"
+	"CIRCLE_WORKFLOW_ID"
+	"CIRCLE_WORKFLOW_JOB_ID"
+	"CIRCLE_WORKFLOW_UPSTREAM_JOB_IDS"
+	"CIRCLE_WORKFLOW_WORKSPACE_ID"
+    )
+fi
+
+# Configure the service account for pulling the docker image.
+function repo_root() {
+    local dir="$1"
+    while [[ ! -d "${dir}/.git" ]]; do
+	dir="$(dirname "$dir")"
+    done
+    echo "${dir}"
+}
+
+# Detect the project root. In CI builds, we assume the script is in
+# the git tree and traverse from there, otherwise, traverse from `pwd`
+# to find `.git` directory.
+if [[ "${RUNNING_IN_CI:-}" == "true" ]]; then
+    PROGRAM_PATH="$(realpath "$0")"
+    PROGRAM_DIR="$(dirname "${PROGRAM_PATH}")"
+    PROJECT_ROOT="$(repo_root "${PROGRAM_DIR}")"
+else
+    PROJECT_ROOT="$(repo_root $(pwd))"
+fi
+
+log_yellow "Changing to the project root: ${PROJECT_ROOT}."
+cd "${PROJECT_ROOT}"
+
+# To support relative path for `TRAMPOLINE_SERVICE_ACCOUNT`, we need
+# to use this environment variable in `PROJECT_ROOT`.
+if [[ -n "${TRAMPOLINE_SERVICE_ACCOUNT:-}" ]]; then
+
+    mkdir -p "${tmpdir}/gcloud"
+    gcloud_config_dir="${tmpdir}/gcloud"
+
+    log_yellow "Using isolated gcloud config: ${gcloud_config_dir}."
+    export CLOUDSDK_CONFIG="${gcloud_config_dir}"
+
+    log_yellow "Using ${TRAMPOLINE_SERVICE_ACCOUNT} for authentication."
+    gcloud auth activate-service-account \
+	   --key-file "${TRAMPOLINE_SERVICE_ACCOUNT}"
+    log_yellow "Configuring Container Registry access"
+    gcloud auth configure-docker --quiet
+fi
+
+required_envvars=(
+    # The basic trampoline configurations.
+    "TRAMPOLINE_IMAGE"
+    "TRAMPOLINE_BUILD_FILE"
+)
+
+if [[ -f "${PROJECT_ROOT}/.trampolinerc" ]]; then
+    source "${PROJECT_ROOT}/.trampolinerc"
+fi
+
+log_yellow "Checking environment variables."
+for e in "${required_envvars[@]}"
+do
+    if [[ -z "${!e:-}" ]]; then
+	log "Missing ${e} env var. Aborting."
+	exit 1
+    fi
+done
+
+# We want to support legacy style TRAMPOLINE_BUILD_FILE used with V1
+# script: e.g. "github/repo-name/.kokoro/run_tests.sh"
+TRAMPOLINE_BUILD_FILE="${TRAMPOLINE_BUILD_FILE#github/*/}"
+log_yellow "Using TRAMPOLINE_BUILD_FILE: ${TRAMPOLINE_BUILD_FILE}"
+
+# ignore error on docker operations and test execution
+set +e
+
+log_yellow "Preparing Docker image."
+# We only download the docker image in CI builds.
+if [[ "${RUNNING_IN_CI:-}" == "true" ]]; then
+    # Download the docker image specified by `TRAMPOLINE_IMAGE`
+
+    # We may want to add --max-concurrent-downloads flag.
+
+    log_yellow "Start pulling the Docker image: ${TRAMPOLINE_IMAGE}."
+    if docker pull "${TRAMPOLINE_IMAGE}"; then
+	log_green "Finished pulling the Docker image: ${TRAMPOLINE_IMAGE}."
+	has_image="true"
+    else
+	log_red "Failed pulling the Docker image: ${TRAMPOLINE_IMAGE}."
+	has_image="false"
+    fi
+else
+    # For local run, check if we have the image.
+    if docker images "${TRAMPOLINE_IMAGE}" | grep "${TRAMPOLINE_IMAGE%:*}"; then
+	has_image="true"
+    else
+	has_image="false"
+    fi
+fi
+
+
+# The default user for a Docker container has uid 0 (root). To avoid
+# creating root-owned files in the build directory we tell docker to
+# use the current user ID.
+user_uid="$(id -u)"
+user_gid="$(id -g)"
+user_name="$(id -un)"
+
+# To allow docker in docker, we add the user to the docker group in
+# the host os.
+docker_gid=$(cut -d: -f3 < <(getent group docker))
+
+update_cache="false"
+if [[ "${TRAMPOLINE_DOCKERFILE:-none}" != "none" ]]; then
+    # Build the Docker image from the source.
+    context_dir=$(dirname "${TRAMPOLINE_DOCKERFILE}")
+    docker_build_flags=(
+	"-f" "${TRAMPOLINE_DOCKERFILE}"
+	"-t" "${TRAMPOLINE_IMAGE}"
+	"--build-arg" "UID=${user_uid}"
+	"--build-arg" "USERNAME=${user_name}"
+    )
+    if [[ "${has_image}" == "true" ]]; then
+	docker_build_flags+=("--cache-from" "${TRAMPOLINE_IMAGE}")
+    fi
+
+    log_yellow "Start building the docker image."
+    if [[ "${TRAMPOLINE_VERBOSE:-false}" == "true" ]]; then
+	echo "docker build" "${docker_build_flags[@]}" "${context_dir}"
+    fi
+
+    # ON CI systems, we want to suppress docker build logs, only
+    # output the logs when it fails.
+    if [[ "${RUNNING_IN_CI:-}" == "true" ]]; then
+	if docker build "${docker_build_flags[@]}" "${context_dir}" \
+		  > "${tmpdir}/docker_build.log" 2>&1; then
+	    if [[ "${TRAMPOLINE_VERBOSE:-}" == "true" ]]; then
+		cat "${tmpdir}/docker_build.log"
+	    fi
+
+	    log_green "Finished building the docker image."
+	    update_cache="true"
+	else
+	    log_red "Failed to build the Docker image, aborting."
+	    log_yellow "Dumping the build logs:"
+	    cat "${tmpdir}/docker_build.log"
+	    exit 1
+	fi
+    else
+	if docker build "${docker_build_flags[@]}" "${context_dir}"; then
+	    log_green "Finished building the docker image."
+	    update_cache="true"
+	else
+	    log_red "Failed to build the Docker image, aborting."
+	    exit 1
+	fi
+    fi
+else
+    if [[ "${has_image}" != "true" ]]; then
+	log_red "We do not have ${TRAMPOLINE_IMAGE} locally, aborting."
+	exit 1
+    fi
+fi
+
+# We use an array for the flags so they are easier to document.
+docker_flags=(
+    # Remove the container after it exists.
+    "--rm"
+
+    # Use the host network.
+    "--network=host"
+
+    # Run in priviledged mode. We are not using docker for sandboxing or
+    # isolation, just for packaging our dev tools.
+    "--privileged"
+
+    # Run the docker script with the user id. Because the docker image gets to
+    # write in ${PWD} you typically want this to be your user id.
+    # To allow docker in docker, we need to use docker gid on the host.
+    "--user" "${user_uid}:${docker_gid}"
+
+    # Pass down the USER.
+    "--env" "USER=${user_name}"
+
+    # Mount the project directory inside the Docker container.
+    "--volume" "${PROJECT_ROOT}:${TRAMPOLINE_WORKSPACE}"
+    "--workdir" "${TRAMPOLINE_WORKSPACE}"
+    "--env" "PROJECT_ROOT=${TRAMPOLINE_WORKSPACE}"
+
+    # Mount the temporary home directory.
+    "--volume" "${tmphome}:/h"
+    "--env" "HOME=/h"
+
+    # Allow docker in docker.
+    "--volume" "/var/run/docker.sock:/var/run/docker.sock"
+
+    # Mount the /tmp so that docker in docker can mount the files
+    # there correctly.
+    "--volume" "/tmp:/tmp"
+    # Pass down the KOKORO_GFILE_DIR and KOKORO_KEYSTORE_DIR
+    # TODO(tmatsuo): This part is not portable.
+    "--env" "TRAMPOLINE_SECRET_DIR=/secrets"
+    "--volume" "${KOKORO_GFILE_DIR:-/dev/shm}:/secrets/gfile"
+    "--env" "KOKORO_GFILE_DIR=/secrets/gfile"
+    "--volume" "${KOKORO_KEYSTORE_DIR:-/dev/shm}:/secrets/keystore"
+    "--env" "KOKORO_KEYSTORE_DIR=/secrets/keystore"
+)
+
+# Add an option for nicer output if the build gets a tty.
+if [[ -t 0 ]]; then
+    docker_flags+=("-it")
+fi
+
+# Passing down env vars
+for e in "${pass_down_envvars[@]}"
+do
+    if [[ -n "${!e:-}" ]]; then
+	docker_flags+=("--env" "${e}=${!e}")
+    fi
+done
+
+# If arguments are given, all arguments will become the commands run
+# in the container, otherwise run TRAMPOLINE_BUILD_FILE.
+if [[ $# -ge 1 ]]; then
+    log_yellow "Running the given commands '" "${@:1}" "' in the container."
+    readonly commands=("${@:1}")
+    if [[ "${TRAMPOLINE_VERBOSE:-}" == "true" ]]; then
+	echo docker run "${docker_flags[@]}" "${TRAMPOLINE_IMAGE}" "${commands[@]}"
+    fi
+    docker run "${docker_flags[@]}" "${TRAMPOLINE_IMAGE}" "${commands[@]}"
+else
+    log_yellow "Running the tests in a Docker container."
+    docker_flags+=("--entrypoint=${TRAMPOLINE_BUILD_FILE}")
+    if [[ "${TRAMPOLINE_VERBOSE:-}" == "true" ]]; then
+	echo docker run "${docker_flags[@]}" "${TRAMPOLINE_IMAGE}"
+    fi
+    docker run "${docker_flags[@]}" "${TRAMPOLINE_IMAGE}"
+fi
+
+
+test_retval=$?
+
+if [[ ${test_retval} -eq 0 ]]; then
+    log_green "Build finished with ${test_retval}"
+else
+    log_red "Build finished with ${test_retval}"
+fi
+
+# Only upload it when the test passes.
+if [[ "${update_cache}" == "true" ]] && \
+       [[ $test_retval == 0 ]] && \
+       [[ "${TRAMPOLINE_IMAGE_UPLOAD:-false}" == "true" ]]; then
+    log_yellow "Uploading the Docker image."
+    if docker push "${TRAMPOLINE_IMAGE}"; then
+	log_green "Finished uploading the Docker image."
+    else
+	log_red "Failed uploading the Docker image."
+    fi
+    # Call trampoline_after_upload_hook if it's defined.
+    if function_exists trampoline_after_upload_hook; then
+	trampoline_after_upload_hook
+    fi
+
+fi
+
+exit "${test_retval}"
diff --git a/synthtool/gcp/templates/node_library/.trampolinerc b/synthtool/gcp/templates/node_library/.trampolinerc
new file mode 100644
index 000000000..164613b9e
--- /dev/null
+++ b/synthtool/gcp/templates/node_library/.trampolinerc
@@ -0,0 +1,51 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Template for .trampolinerc
+
+# Add required env vars here.
+required_envvars+=(
+)
+
+# Add env vars which are passed down into the container here.
+pass_down_envvars+=(
+    "AUTORELEASE_PR"
+)
+
+# Prevent unintentional override on the default image.
+if [[ "${TRAMPOLINE_IMAGE_UPLOAD:-false}" == "true" ]] && \
+   [[ -z "${TRAMPOLINE_IMAGE:-}" ]]; then
+   echo "Please set TRAMPOLINE_IMAGE if you want to upload the Docker image."
+   exit 1
+fi
+
+# Define the default value if it makes sense.
+if [[ -z "${TRAMPOLINE_IMAGE_UPLOAD:-}" ]]; then
+    TRAMPOLINE_IMAGE_UPLOAD=""
+fi
+
+if [[ -z "${TRAMPOLINE_IMAGE:-}" ]]; then
+    TRAMPOLINE_IMAGE=""
+fi
+
+if [[ -z "${TRAMPOLINE_DOCKERFILE:-}" ]]; then
+    TRAMPOLINE_DOCKERFILE=""
+fi
+
+if [[ -z "${TRAMPOLINE_BUILD_FILE:-}" ]]; then
+    TRAMPOLINE_BUILD_FILE=""
+fi
+
+# Secret Manager secrets.
+source ${PROJECT_ROOT}/.kokoro/populate-secrets.sh