deploy_jenkins.sh

#!/usr/bin/env bash
# Usage: ./deploy_jenkins 2.12 [beanstalk_env_name]
set -e

JENKINS_VERSION=$1
BEANSTALK_ENV=$2
JENKINS_WAR_URL="http://mirrors.jenkins-ci.org/war/$JENKINS_VERSION/jenkins.war"
BEANSTALK_APPLICATION="jenkins"
S3_BUCKET="elasticbeanstalk-jenkins-war-versions"
TMP="/tmp"
WAR_NAME="jenkins-$JENKINS_VERSION.war"
WAR_PATH="$TMP/$WAR_NAME"

echo -n "Checking if application version already exists..."
output=$(aws elasticbeanstalk describe-application-versions --application-name=$BEANSTALK_APPLICATION --version-label=$JENKINS_VERSION | grep PROCESSED || true)
if [[ "$output" == "" ]]; then
  echo 'false, creating...'
  echo "Downloading $JENKINS_WAR_URL => $WAR_PATH..."
  curl -sL "$JENKINS_WAR_URL" > $WAR_PATH

  echo -n "Ensuring S3 bucket exists... "
  aws s3 mb s3://$S3_BUCKET # a no-op if it already exists

  echo -n "Uploading war to S3... "
  aws s3 cp $WAR_PATH s3://$S3_BUCKET

  echo "Creating Elastic Beanstalk Application Version with this war..."
  aws elasticbeanstalk create-application-version --auto-create-application --application-name=$BEANSTALK_APPLICATION --version-label=$JENKINS_VERSION --source-bundle=S3Bucket=$S3_BUCKET,S3Key=$WAR_NAME --process
else
  echo 'true, skipping.'
fi

if [[ "$BEANSTALK_ENV" != "" ]]; then
    eb deploy "$BEANSTALK_ENV" --version "$JENKINS_VERSION"
fi

jenkins.tf

resource "aws_elastic_beanstalk_application" "jenkins" {
  name = "jenkins"
  description = "Jenkins CI"
}

resource "aws_elastic_beanstalk_environment" "jenkins-beanstalk" {
  name = "jenkins-beanstalk"
  application = "${aws_elastic_beanstalk_application.jenkins.name}"
  solution_stack_name = "64bit Amazon Linux 2016.03 v2.1.3 running Tomcat 8 Java 8"

  provisioner "local-exec" {
    command = "deploy_jenkins.sh 2.12 jenkins-beanstalk"
  }
}