cfn-create-stack.sh

#!/bin/bash

# --
# Usage:
#
# ./cfn-create-stack.sh
# --

# --
# Stop script if any command fails and run _cleanup() function
# --

set -e
trap _cleanup ERR

# --
# Functions
# --

function _cleanup {
  printf "[docker-cloud-startup] ERROR - STOPPING EARLY.\n"
}

function _error {
  printf "[docker-cloud-startup]   -> Error: $1.\n"
}

function _finished {
  printf "[docker-cloud-startup] SCRIPT COMPLETE.\n"
}

function _ok {
  printf "[docker-cloud-startup]   -> ok.\n"
}

function _output {
  printf "[docker-cloud-startup] $1\n"
}

function _result {
  printf "[docker-cloud-startup]   -> $1\n"
}

# --
# Set up defaults
# --

UUID=$(cat /proc/sys/kernel/random/uuid | cut -d '-' -f 1)
CLOUDFORMATION_STACK_NAME=${CLOUDFORMATION_STACK_PREFIX:-docker-cloud-byoh}-${UUID}
AMI_ID=${AMI_ID:-ami-2d39803a}
INSTANCE_TYPE=${INSTANCE_TYPE:-m3.medium}
DESIRED_CAPACITY=${DESIRED_CAPACITY:-1}
DEPLOYMENT_TIMEOUT=${DEPLOYMENT_TIMEOUT:-2m}
DOCKERCLOUD_NAMESPACE=${DOCKERCLOUD_NAMESPACE:-${DOCKER_USER}}

_output "Uploading startup script..."

# We are forced to outsource the major portion of user data to an external location due 
# to character length restrictions of parameter fields.
user_data_path="${S3_BUCKET}/docker-cloud-startup/${CLOUDFORMATION_STACK_NAME}/script.sh"
aws s3 cp --acl public-read script.sh "s3://$user_data_path"

_result "\"https://s3.amazonaws.com/$user_data_path\""

_ok


_output "Creating Cloudformation stack..."

aws --region ${AWS_REGION} cloudformation create-stack \
  --stack-name "${CLOUDFORMATION_STACK_NAME}" \
  --template-body file://cloud-formation-template.json \
  --capabilities CAPABILITY_IAM \
  --parameters ParameterKey=ImageId,ParameterValue=${AMI_ID} \
               ParameterKey=KeyPairName,ParameterValue=${KEYPAIR_NAME} \
               ParameterKey=IamInstanceProfile,ParameterValue=${IAM_ROLE} \
               ParameterKey=SecurityGroups,ParameterValue=\"${SECURITY_GROUPS}\" \
               ParameterKey=AvailabilityZones,ParameterValue=\"${AVAILABILITY_ZONES}\" \
               ParameterKey=VpcId,ParameterValue=\"${VPC_ID}\" \
               ParameterKey=Subnets,ParameterValue=\"${SUBNETS}\" \
               ParameterKey=InstanceType,ParameterValue=${INSTANCE_TYPE} \
               ParameterKey=DesiredCapacity,ParameterValue=${DESIRED_CAPACITY} \
               ParameterKey=DeployScriptLocation,ParameterValue="https://s3.amazonaws.com/$user_data_path" \
               ParameterKey=DockerCloudUser,ParameterValue=${DOCKER_USER} \
               ParameterKey=DockerCloudApiKey,ParameterValue=${API_KEY} \
               ParameterKey=DockerCloudNamespace,ParameterValue=${DOCKERCLOUD_NAMESPACE} \
               ParameterKey=DeploymentTimeout,ParameterValue=${DEPLOYMENT_TIMEOUT} \
               ParameterKey=RedeployStacks,ParameterValue=\"${REDEPLOY_STACKS}\" \
  --tags Key=Name,Value="${CLOUDFORMATION_STACK_NAME}" \
         Key='Node Cluster Name',Value="${CLOUDFORMATION_STACK_NAME}" \
         Key='Docker ID username',Value=${DOCKERCLOUD_NAMESPACE} \
         ${TAGS}

_ok

_finished