Add terraform scripts to build nginx image (#4484)

build/build-nginx-image.sh

@@ -0,0 +1,58 @@
+#!/bin/bash
+
+# Copyright 2019 The Kubernetes Authors.
+#
+# 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.
+
+if [ -n "$DEBUG" ]; then
+	set -x
+fi
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+declare -a mandatory
+mandatory=(
+  AWS_ACCESS_KEY
+  AWS_SECRET_KEY
+)
+
+missing=false
+for var in "${mandatory[@]}"; do
+  if [[ -z "${!var:-}" ]]; then
+    echo "Environment variable $var must be set"
+    missing=true
+  fi
+done
+
+if [ "$missing" = true ]; then
+  exit 1
+fi
+
+DIR=$(cd $(dirname "${BASH_SOURCE}") && pwd -P)
+
+# build local terraform image to build nginx
+docker build -t build-nginx-terraform $DIR/images/nginx
+
+# build nginx and publish docker images to quay.io.
+# this can take up to two hours.
+docker run --rm -it \
+  --volume $DIR/images/nginx:/tf \
+  -w /tf \
+  --env AWS_ACCESS_KEY=${AWS_ACCESS_KEY} \
+  --env AWS_SECRET_KEY=${AWS_SECRET_KEY} \
+  --env AWS_SECRET_KEY=${AWS_SECRET_KEY} \
+  --env QUAY_USERNAME=${QUAY_USERNAME} \
+  --env QUAY_PASSWORD="${QUAY_PASSWORD}" \
+  build-nginx-terraform