deploy.sh

#!/usr/bin/env bash
set -eo pipefail

# more bash-friendly output for jq
JQ="jq --raw-output --exit-status"

ENV=$1
TAG=$2
AWS_REGION=$(eval "echo \$${ENV}_AWS_REGION")
AWS_ECS_CLUSTER=$(eval "echo \$${ENV}_AWS_ECS_CLUSTER")
ACCOUNT_ID=$(eval "echo \$${ENV}_AWS_ACCOUNT_ID")

AWS_ECS_SERVICE=$(eval "echo \$${ENV}_AWS_ECS_SERVICE")
AWS_REPOSITORY=$(eval "echo \$${ENV}_AWS_REPOSITORY")
AWS_ECS_TASK_FAMILY=$(eval "echo \$${ENV}_AWS_ECS_TASK_FAMILY")

DD_SERVICE_NAME=$(eval "echo \$${ENV}_DD_SERVICE_NAME")
DD_TRACE_AGENT_HOSTNAME=$(eval "echo \$${ENV}_DD_TRACE_AGENT_HOSTNAME")

echo $AWS_ECS_SERVICE
configure_aws_cli() {
	AWS_ACCESS_KEY_ID=$(eval "echo \$${ENV}_AWS_ACCESS_KEY_ID")
	AWS_SECRET_ACCESS_KEY=$(eval "echo \$${ENV}_AWS_SECRET_ACCESS_KEY")
	aws --version
	aws configure set aws_access_key_id $AWS_ACCESS_KEY_ID
	aws configure set aws_secret_access_key $AWS_SECRET_ACCESS_KEY
	aws configure set default.region $AWS_REGION
	aws configure set default.output json
  echo "Configured AWS CLI."
}

deploy_cluster() {
    make_task_def
    register_definition
	if [[ $(aws ecs update-service --cluster $AWS_ECS_CLUSTER --service $AWS_ECS_SERVICE --task-definition $revision | $JQ '.service.taskDefinition') != $revision ]]; then
        echo "Error updating service."
        return 1
    fi

    echo "Deployed!"
    return 0
}

make_task_def(){
	task_template='[
	{
		"name": "%s",
		"image": "%s.dkr.ecr.%s.amazonaws.com/%s:%s",
		"essential": true,
		"memory": 1000,
		"cpu": 100,
		"environment": [
		{
			"name": "NODE_CONFIG_ENV",
			"value": "%s"
		},
		{
			"name": "DD_SERVICE_NAME",
			"value": "%s"
		},
		{
			"name": "DD_TRACE_AGENT_HOSTNAME",
			"value": "%s"
		}
		],
		"portMappings": [
		{
			"hostPort": 0,
			"containerPort": 3000,
			"protocol": "tcp"
		}
		],
		"logConfiguration": {
		"logDriver": "awslogs",
		"options": {
			"awslogs-group": "/aws/ecs/%s",
			"awslogs-region": "%s",
			"awslogs-stream-prefix": "%s"
		}
		}
	}
	]'

	if [ "$ENV" = "PROD" ]; then
			NODE_CONFIG_ENV=production
	elif [ "$ENV" = "PRODBETA" ]; then
			NODE_CONFIG_ENV=production
	elif [ "$ENV" = "DEV" ]; then
			NODE_CONFIG_ENV=development
	elif [ "$ENV" = "TEST" ]; then
			NODE_CONFIG_ENV=development
	fi

	task_def=$(printf "$task_template" $AWS_ECS_CLUSTER $ACCOUNT_ID $AWS_REGION $AWS_REPOSITORY $TAG $NODE_CONFIG_ENV $DD_SERVICE_NAME $DD_TRACE_AGENT_HOSTNAME $AWS_ECS_CLUSTER $AWS_REGION $AWS_ECS_CLUSTER)
	echo $task_def
}

push_ecr_image() {
  echo "Pushing Docker Image..."
	eval $(aws ecr get-login --region $AWS_REGION --no-include-email)
	docker push $ACCOUNT_ID.dkr.ecr.$AWS_REGION.amazonaws.com/$AWS_REPOSITORY:$TAG
  echo "Docker Image published."
}

register_definition() {
    if revision=$(aws ecs register-task-definition --container-definitions "$task_def" --family $AWS_ECS_TASK_FAMILY | $JQ '.taskDefinition.taskDefinitionArn'); then
        echo "Revision: $revision"
    else
        echo "Failed to register task definition"
        return 1
    fi
}

configure_aws_cli
push_ecr_image
deploy_cluster