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{
"AWSTemplateFormatVersion": "2010-09-09",
"Description": "Server Stack",
"Parameters": {
"AppName": {
"Description": "App Name - use a-z only - preferably all lower-case for consistency. Something like 'blog' - it should match the app's appspec file",
"Type": "String",
"MinLength": "1"
},
"BucketPrefix": {
"Description": "A unique string - use something like 'yourname'. This is used to make sure that your S3 bucket name is unique",
"Type": "String",
"MinLength": "1"
},
"EnvironmentName": {
"Description": "The environment we are building",
"Type": "String",
"Default": "dev",
"AllowedValues": [
"dev",
"staging",
"production"
],
"MinLength": "1"
},
"SSHLocation": {
"Description": "The IP address range that can be used to SSH to the EC2 instances. Use 0.0.0.0/0 for everyone everywhere (insecure)",
"Type": "String",
"MinLength": "9",
"MaxLength": "18",
"Default": "0.0.0.0/0",
"AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
"ConstraintDescription": "must be a valid IP CIDR range of the form x.x.x.x/x."
},
"SSLCertificateIdArn": {
"Description": "SSL Certification ID uploaded from AWS CLI. See Arn item in output of 'aws iam list-server-certificates'. Something like arn:aws:iam::123123123:server-certificate/something_over_here",
"Type": "String",
"MinLength": "1"
},
"SSHKeyName": {
"Description": "Name of an existing EC2 KeyPair to enable SSH access to the instances",
"Type": "AWS::EC2::KeyPair::KeyName",
"ConstraintDescription": "must be the name of an existing EC2 KeyPair.",
"MinLength": "1"
},
"DBPassword": {
"NoEcho": "true",
"Description": "The Database Admin Account Password",
"Type": "String",
"MinLength": "8",
"MaxLength": "41",
"AllowedPattern": "[a-zA-Z0-9]*",
"ConstraintDescription": "must contain only alphanumeric characters."
},
"DBMultiAZ": {
"Default": "false",
"Description": "Create a Multi-AZ MySQL Amazon RDS database instance",
"Type": "String",
"AllowedValues": [
"true",
"false"
],
"ConstraintDescription": "must be either true or false."
},
"DBAllocatedStorage": {
"Default": "5",
"Description": "Allocated DB storage - choose higher for more IOPS",
"Type": "String",
"MinLength": "1"
},
"DBInstanceType": {
"Default": "db.m3.medium",
"Description": "DB Instance Type. ",
"Type": "String",
"MinLength": "1"
},
"DBStorageEncrypted": {
"Default": "true",
"AllowedValues": [
"true",
"false"
],
"Description": "DB Instance Encrypt DB Storage (see http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Overview.Encryption.html for supported instance sizes)",
"Type": "String",
"MinLength": "1"
},
"DBMaxConnections": {
"Type": "String",
"Description": "Max DB Connections. Set to 800 on db.m3.xlarge instance - much smaller on tiny instance (30).",
"Default": "100",
"MinLength": "1"
},
"DBName": {
"Type": "String",
"Description": "Database Name - something like 'blog_dev'. Must be all alphanumeric, start with a letter, and can only contain _ (not -)",
"MinLength": "1"
},
"DBStorageType": {
"Type": "String",
"Description": "Storage type - standard for traditional disk, gp2 for SSD",
"Default": "gp2",
"AllowedValues": [
"gp2",
"standard"
]
},
"SecretKeyBase": {
"NoEcho": "true",
"Description": "The Rails Secret Key Base value - use 'bundle exec rake secret' in a rails app",
"Type": "String",
"MinLength": "1",
"MaxLength": "128",
"AllowedPattern": "[-a-zA-Z0-9]*",
"ConstraintDescription": "must contain only alphanumeric characters."
},
"ServerAMIID": {
"Description": "The Ubuntu AMI to use as the server base - use latest hvm-ssd for eu-west-1 from http://cloud-images.ubuntu.com/trusty/current/",
"Type": "String",
"ConstraintDescription": "Must be a valid AMI ID",
"MinLength": "1"
},
"WebserverInstanceType": {
"Default": "m3.medium",
"Description": "Webserver Instance Type. Probably c4.xlarge for production",
"Type": "String",
"MinLength": "1"
},
"WebServerCountDesired": {
"Description": "Desired number of webservers",
"Type": "String",
"Default": "1",
"ConstraintDescription": "Autoscaling group - desired number of webservers"
},
"WebServerCountMin": {
"Description": "Minimum number of webservers",
"Type": "String",
"Default": "1",
"ConstraintDescription": "Autoscaling group - minimum number of webservers"
},
"WebServerCountMax": {
"Description": "Maximum number of webservers",
"Type": "String",
"Default": "1",
"ConstraintDescription": "Autoscaling group - maximum number of webservers"
},
"WebServerHealthCheckType": {
"Description": "Webserver Health Check Type",
"Type": "String",
"Default": "EC2",
"AllowedValues": [
"ELB",
"EC2"
]
}
},
"Resources": {
"VPC": {
"Metadata": {
"Comment1": "We don't use the default VPC - this makes it easier to ensure the state is exactly as we expect",
"Comment2": "Yes, we DO use overlapping IP addresses between the different environments.",
"Comment3": "Overlapping IPs ensure that they can't communicate via private IP address."
},
"Properties": {
"CidrBlock": "10.0.0.0/16",
"EnableDnsHostnames": "true",
"EnableDnsSupport": "true",
"InstanceTenancy": "default",
"Tags": [
{
"Key": "Name",
"Value": {
"Ref": "EnvironmentName"
}
}
]
},
"Type": "AWS::EC2::VPC"
},
"InternetGateway": {
"Metadata": {
"Comment1": "This, along with GW1 below are required for internet access, unless you want to run your own NAT instance.",
"Comment2": "Running a NAT instance means you have a single point of failure, unless you spend a lot of extra energy on it."
},
"Type": "AWS::EC2::InternetGateway"
},
"GW1": {
"Properties": {
"InternetGatewayId": {
"Ref": "InternetGateway"
},
"VpcId": {
"Ref": "VPC"
}
},
"Type": "AWS::EC2::VPCGatewayAttachment"
},
"MainRouteTable": {
"Metadata": {
"Comment1": "Create a custom routing table and add a default route to it.",
"Comment2": "We use our own routing table (not the VPC routing table), since we need references to it later on in this file"
},
"DependsOn": "GW1",
"Properties": {
"VpcId": {
"Ref": "VPC"
},
"Tags": [
{
"Key": "Name",
"Value": "MainRouteTable"
}
]
},
"Type": "AWS::EC2::RouteTable"
},
"DefaultRoute": {
"Metadata": {
"Comment1": "The default route for anything other than our internal IP range"
},
"DependsOn": "GW1",
"Properties": {
"DestinationCidrBlock": "0.0.0.0/0",
"GatewayId": {
"Ref": "InternetGateway"
},
"RouteTableId": {
"Ref": "MainRouteTable"
}
},
"Type": "AWS::EC2::Route"
},
"ServerSubnetWest1A": {
"Metadata": {
"Comment1": "We have two server subnets for redundancy",
"Comment2": "Using this subnet for a service later on will then place it in this Availability Zone"
},
"Properties": {
"AvailabilityZone": "eu-west-1a",
"CidrBlock": "10.0.1.0/24",
"Tags": [
{
"Key": "Name",
"Value": "Server Subnet West 1A"
}
],
"VpcId": {
"Ref": "VPC"
}
},
"Type": "AWS::EC2::Subnet"
},
"ServerSubnetWest1ARoute": {
"Metadata": {
"Comment1": "Add a route for this AZ into the main routing table"
},
"Properties": {
"RouteTableId": {
"Ref": "MainRouteTable"
},
"SubnetId": {
"Ref": "ServerSubnetWest1A"
}
},
"Type": "AWS::EC2::SubnetRouteTableAssociation"
},
"ServerSubnetWest1B": {
"Metadata": {
"Comment1": "Our second server subnet. See the comment on ServerSubnetWest1A for more details"
},
"Properties": {
"AvailabilityZone": "eu-west-1b",
"CidrBlock": "10.0.2.0/24",
"Tags": [
{
"Key": "Name",
"Value": "Server Subnet West 1B"
}
],
"VpcId": {
"Ref": "VPC"
}
},
"Type": "AWS::EC2::Subnet"
},
"ServerSubnetWest1BRoute": {
"Properties": {
"RouteTableId": {
"Ref": "MainRouteTable"
},
"SubnetId": {
"Ref": "ServerSubnetWest1B"
}
},
"Type": "AWS::EC2::SubnetRouteTableAssociation"
},
"DBSubnetWest1A": {
"Metadata": {
"Comment1": "Subnet where our database can live (it may live in multiple zones if multi-az was selected)"
},
"Properties": {
"AvailabilityZone": "eu-west-1a",
"CidrBlock": "10.0.10.0/24",
"Tags": [
{
"Key": "Name",
"Value": "DB Subnet West 1A"
}
],
"VpcId": {
"Ref": "VPC"
}
},
"Type": "AWS::EC2::Subnet"
},
"DBSubnetWest1ARoute": {
"Metadata": {
"Comment1": "Route for the DBSubnetWest1A subnet"
},
"Properties": {
"RouteTableId": {
"Ref": "MainRouteTable"
},
"SubnetId": {
"Ref": "DBSubnetWest1A"
}
},
"Type": "AWS::EC2::SubnetRouteTableAssociation"
},
"DBSubnetWest1B": {
"Metadata": {
"Comment1": "Second subnet where our database could live (See See comment on DBSubnetWest1A for more details)"
},
"Properties": {
"AvailabilityZone": "eu-west-1b",
"CidrBlock": "10.0.11.0/24",
"Tags": [
{
"Key": "Name",
"Value": "DB Subnet West 1B"
}
],
"VpcId": {
"Ref": "VPC"
}
},
"Type": "AWS::EC2::Subnet"
},
"DBSubnetWest1BRoute": {
"Metadata": {
"Comment1": "Route for the DBSubnetWest1B subnet"
},
"Properties": {
"RouteTableId": {
"Ref": "MainRouteTable"
},
"SubnetId": {
"Ref": "DBSubnetWest1B"
}
},
"Type": "AWS::EC2::SubnetRouteTableAssociation"
},
"DBSubnetGroup": {
"Metadata": {
"Comment1": "Subnet Group that combines the DB subnets. A DB is then placed in a subnet group"
},
"Properties": {
"DBSubnetGroupDescription": "DB Subnet",
"SubnetIds": [
{
"Ref": "DBSubnetWest1A"
},
{
"Ref": "DBSubnetWest1B"
}
]
},
"Type": "AWS::RDS::DBSubnetGroup"
},
"DBSecurityGroup": {
"Metadata": {
"Comment1": "Allow access to the DB from ServerSubnetWest1A and ServerSubnetWest1B",
"Comment2": "Using a SourceSecurityGroupId here instead is left as a FIXME for the reader"
},
"Properties": {
"GroupDescription": "RDS postgres access",
"SecurityGroupEgress": [
{
"CidrIp": "0.0.0.0/0",
"FromPort": "0",
"IpProtocol": "-1",
"ToPort": "0"
}
],
"SecurityGroupIngress": [
{
"CidrIp": "10.0.1.0/24",
"FromPort": "5432",
"IpProtocol": "tcp",
"ToPort": "5432"
},
{
"CidrIp": "10.0.2.0/24",
"FromPort": "5432",
"IpProtocol": "tcp",
"ToPort": "5432"
}
],
"VpcId": {
"Ref": "VPC"
}
},
"Type": "AWS::EC2::SecurityGroup"
},
"DBParameterGroup": {
"Metadata": {
"Comment1": "Given our threading model and the number of servers, we needed a way to increase the number of open connections on the DB server.",
"Comment2": "We thus create a Parameter Group that we can apply to the DB instance."
},
"Properties": {
"Description": {
"Fn::Join": [
"",
[
{
"Ref": "AppName"
},
"-",
{
"Ref": "EnvironmentName"
},
" DB Parameter Group"
]
]
},
"Family": "postgres9.4",
"Parameters": {
"max_connections": {
"Ref": "DBMaxConnections"
}
}
},
"Type": "AWS::RDS::DBParameterGroup"
},
"DBInstance": {
"Metadata": {
"Comment1": "The system database"
},
"Properties": {
"AllocatedStorage": {
"Ref": "DBAllocatedStorage"
},
"DBInstanceClass": {
"Ref": "DBInstanceType"
},
"DBName": { "Ref": "DBName" },
"DBParameterGroupName": {
"Ref": "DBParameterGroup"
},
"DBSubnetGroupName": {
"Ref": "DBSubnetGroup"
},
"StorageType": {
"Ref": "DBStorageType"
},
"Engine": "postgres",
"EngineVersion": "9.4.1",
"MasterUserPassword": {
"Ref": "DBPassword"
},
"MasterUsername": {
"Fn::Join": [
"",
[
{
"Ref": "DBName"
},
"_",
{
"Ref": "EnvironmentName"
},
"_user"
]
]
},
"MultiAZ": {
"Ref": "DBMultiAZ"
},
"VPCSecurityGroups": [
{
"Ref": "DBSecurityGroup"
}
],
"StorageEncrypted": {
"Ref": "DBStorageEncrypted"
}
},
"Type": "AWS::RDS::DBInstance"
},
"ELBSubnetWest1A": {
"Metadata": {
"Comment1": "Elastic Load Balancer network - we place the ELB on multiple separate networks in their own IP ranges"
},
"Properties": {
"AvailabilityZone": "eu-west-1a",
"CidrBlock": "10.0.30.0/24",
"Tags": [
{
"Key": "Name",
"Value": "ELB Subnet West 1A"
}
],
"VpcId": {
"Ref": "VPC"
}
},
"Type": "AWS::EC2::Subnet"
},
"ELBSubnetWest1ARoute": {
"Metadata": {
"Comment1": "Route to the first ELB subnet - ELBSubnetWest1B"
},
"Properties": {
"RouteTableId": {
"Ref": "MainRouteTable"
},
"SubnetId": {
"Ref": "ELBSubnetWest1A"
}
},
"Type": "AWS::EC2::SubnetRouteTableAssociation"
},
"ELBSubnetWest1B": {
"Metadata": {
"Comment1": "The second Elastic Load Balancer network"
},
"Properties": {
"AvailabilityZone": "eu-west-1b",
"CidrBlock": "10.0.31.0/24",
"Tags": [
{
"Key": "Name",
"Value": "ELB Subnet West 1B"
}
],
"VpcId": {
"Ref": "VPC"
}
},
"Type": "AWS::EC2::Subnet"
},
"ELBSubnetWest1BRoute": {
"Metadata": {
"Comment1": "Route to the second ELB subnet - ELBSubnetWest1B"
},
"Properties": {
"RouteTableId": {
"Ref": "MainRouteTable"
},
"SubnetId": {
"Ref": "ELBSubnetWest1B"
}
},
"Type": "AWS::EC2::SubnetRouteTableAssociation"
},
"ElasticLoadBalancer": {
"Metadata": {
"Comment1": "The Elastic Load Balancer"
},
"DependsOn": "GW1",
"Properties": {
"LoadBalancerName": {
"Fn::Join": [
"",
[
{
"Ref": "AppName"
},
"-",
{
"Ref": "EnvironmentName"
}
]
]
},
"CrossZone": "true",
"HealthCheck": {
"Target": "HTTP:80/ping",
"HealthyThreshold": "2",
"UnhealthyThreshold": "5",
"Interval": "10",
"Timeout": "5"
},
"ConnectionDrainingPolicy": {
"Enabled": "true",
"Timeout": "300"
},
"LBCookieStickinessPolicy": [
{
"PolicyName": "CookieBasedPolicy",
"CookieExpirationPeriod": "30"
}
],
"Listeners": [
{
"LoadBalancerPort": "80",
"InstancePort": "80",
"Protocol": "HTTP"
},
{
"LoadBalancerPort": "443",
"InstancePort": "80",
"Protocol": "HTTPS",
"SSLCertificateId": {
"Ref": "SSLCertificateIdArn"
}
}
],
"SecurityGroups": [
{
"Ref": "ELBSecurityGroup"
}
],
"Subnets": [
{
"Ref": "ELBSubnetWest1A"
},
{
"Ref": "ELBSubnetWest1B"
}
]
},
"Type": "AWS::ElasticLoadBalancing::LoadBalancer"
},
"ELBSecurityGroup": {
"Metadata": {
"Comment1": "Enable HTTP and HTTPS access to the load balancer"
},
"Type": "AWS::EC2::SecurityGroup",
"Properties": {
"GroupDescription": "Enable HTTP and HTTPS access to the load balancer from anywhere",
"SecurityGroupIngress": [
{
"IpProtocol": "tcp",
"FromPort": "80",
"ToPort": "80",
"CidrIp": "0.0.0.0/0"
},
{
"IpProtocol": "tcp",
"FromPort": "443",
"ToPort": "443",
"CidrIp": "0.0.0.0/0"
}
],
"VpcId": {
"Ref": "VPC"
}
}
},
"ServerSecurityGroup": {
"Metadata": {
"Comment1": "All access to the web servers must go through an ELB. Additionally, we terminate SSL at the ELB, so all traffic from ELB to Hosts",
"Comment2": "is on port 80, not 443."
},
"Type": "AWS::EC2::SecurityGroup",
"Properties": {
"GroupDescription": "Enable HTTP and HTTPS access locked down to the load balancer + SSH and web access from Gateway Security Group",
"SecurityGroupIngress": [
{
"IpProtocol": "tcp",
"FromPort": "80",
"ToPort": "80",
"SourceSecurityGroupId": {
"Ref": "ELBSecurityGroup"
}
},
{
"IpProtocol": "tcp",
"FromPort": "22",
"ToPort": "22",
"CidrIp": {
"Ref": "SSHLocation"
}
}
],
"VpcId": {
"Ref": "VPC"
}
}
},
"CodeDeployTrustRole": {
"Metadata": {
"Comment1": "Link EC2 and CodeDeploy, so that CodeDeploy can deploy to the EC2 instances",
"Comment2": "See http://docs.aws.amazon.com/codedeploy/latest/userguide/how-to-create-iam-instance-profile.html"
},
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Statement": [
{
"Sid": "1",
"Effect": "Allow",
"Principal": {
"Service": [
"codedeploy.eu-west-1.amazonaws.com"
]
},
"Action": "sts:AssumeRole"
}
]
},
"Path": "/"
}
},
"CodeDeployRolePolicies": {
"Metadata": {
"Comment1": "See http://docs.aws.amazon.com/codedeploy/latest/userguide/how-to-create-iam-instance-profile.html"
},
"Type": "AWS::IAM::Policy",
"Properties": {
"PolicyName": "CodeDeployPolicy",
"PolicyDocument": {
"Statement": [
{
"Effect": "Allow",
"Resource": [
"*"
],
"Action": [
"ec2:Describe*"
]
},
{
"Effect": "Allow",
"Resource": [
"*"
],
"Action": [
"autoscaling:CompleteLifecycleAction",
"autoscaling:DeleteLifecycleHook",
"autoscaling:DescribeLifecycleHooks",
"autoscaling:DescribeAutoScalingGroups",
"autoscaling:PutLifecycleHook",
"autoscaling:RecordLifecycleActionHeartbeat"
]
}
]
},
"Roles": [
{
"Ref": "CodeDeployTrustRole"
}
]
}
},
"InstanceRole": {
"Metadata": {
"Comment1": "EC2 instances need to be able to perform certain actions to perform autoscale and code-deploy actions",
"Comment2": "Instead of hard-coding security tokens anywhere, we allow the instances to take on specific roles dynamically.",
"Comment3": "See http://docs.aws.amazon.com/IAM/latest/UserGuide/roles-usingrole-ec2instance.html for general info"
},
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": [
"ec2.amazonaws.com"
]
},
"Action": [
"sts:AssumeRole"
]
}
]
},
"Path": "/"
}
},
"InstanceRolePolicies": {
"Metadata": {
"Comment1": "CodeDeploy needs to fetch items from the AWS codedeploy buckets to perform deployments",
"Comment2": "See http://docs.aws.amazon.com/codedeploy/latest/userguide/how-to-create-iam-instance-profile.html",
"Comment4": "CodeDeploy will take servers in and out of service as upgrades are applied",
"Comment5": "To do this, it needs permission to access these resources",
"Comment6": "See https://blogs.aws.amazon.com/application-management/post/Tx39X8HM93NXU47/Use-AWS-CodeDeploy-to-Deploy-to-Amazon-EC2-Instances-Behind-an-Elastic-Load-Bala",
"Comment7": "CodeDeploy will take servers in and out of service from the ELB while upgrades are running",
"Comment8": "ELB rules allow instances to retrieve ELB info, and remove and add themselves back into the ELB",
"Comment9": "See http://docs.aws.amazon.com/codedeploy/latest/userguide/elastic-load-balancing-integ.html",
"Comment10": "Let the systems access the S3 bucket where release files are stored",
"Comment11": "We also use CloudWatch's logging solution to centralise logs from autoscaled servers.",
"Comment12": "See http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/EC2NewInstanceCWL.html",
"Comment13": "FIXME - Do we need cloudformation:Describe and cloudformation:GetTemplate in the autoscaling group section too? FIXME"
},
"Type": "AWS::IAM::Policy",
"Properties": {
"PolicyName": "InstanceRole",
"PolicyDocument": {
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:Get*",
"s3:List*"
],
"Resource": "arn:aws:s3:::aws-codedeploy-eu-west-1/*"
},
{
"Effect": "Allow",
"Action": [
"autoscaling:Describe*",
"autoscaling:EnterStandby",
"autoscaling:ExitStandby",
"autoscaling:UpdateAutoScalingGroup"
],
"Resource": "*"
},
{
"Effect": "Allow",
"Action": [
"elasticloadbalancing:Describe*",
"elasticloadbalancing:DeregisterInstancesFromLoadBalancer",
"elasticloadbalancing:RegisterInstancesWithLoadBalancer"
],
"Resource": {
"Fn::Join": [
"",
[
"arn:aws:elasticloadbalancing:",
{
"Ref": "AWS::Region"
},
":",
{
"Ref": "AWS::AccountId"
},
":loadbalancer/",
{
"Ref": "AppName"
},
"-",
{
"Ref": "EnvironmentName"
}
]
]
}
},
{
"Effect": "Allow",
"Action": [
"s3:ListBucket"
],
"Resource": {
"Fn::Join": [
"",
[
"arn:aws:s3:::",
{
"Ref": "BucketPrefix"
},
"-",
{
"Ref": "AppName"
},
"-",
{
"Ref": "EnvironmentName"
},
"-releases"
]
]
}
},
{
"Effect": "Allow",
"Action": [
"s3:Get*"
],
"Resource": {
"Fn::Join": [
"",
[
"arn:aws:s3:::",
{
"Ref": "BucketPrefix"
},
"-",
{
"Ref": "AppName"
},
"-",
{
"Ref": "EnvironmentName"
},
"-releases/*"
]
]
}
},
{
"Effect": "Allow",
"Action": [
"logs:CreateLogGroup",
"logs:CreateLogStream",
"logs:PutLogEvents",
"logs:DescribeLogStreams"
],
"Resource": [
"arn:aws:logs:*:*:*"
]
}
]
},
"Roles": [
{
"Ref": "InstanceRole"
}
]
}
},
"WebServerInstanceRoleProfile": {
"Type": "AWS::IAM::InstanceProfile",
"Properties": {
"Path": "/",
"Roles": [
{
"Ref": "InstanceRole"
}
]
}
},
"WebServerLaunchConfig": {
"Metadata": {
"Comment1": "This is the core of the system - an AutoScaling Group event happens, it uses this config",
"Comment2": "to build the instances. Here's where we fetch the Ansible configuration from S3 and apply",
"Comment3": "it to the box that's being built.",
"Comment4": "The base drive is too small for reasonably sized logs. So we add some disk space on /dev/xvdf"
},
"Type": "AWS::AutoScaling::LaunchConfiguration",
"DependsOn": "GW1",
"Properties": {
"AssociatePublicIpAddress": "True",
"BlockDeviceMappings": [
{
"DeviceName": "/dev/xvdf",
"Ebs": {
"VolumeSize": 50,
"VolumeType": "gp2"
}
}
],
"ImageId": {
"Ref": "ServerAMIID"
},
"KeyName": {
"Ref": "SSHKeyName"
},
"SecurityGroups": [
{
"Ref": "ServerSecurityGroup"
}
],
"InstanceType": {
"Ref": "WebserverInstanceType"
},
"IamInstanceProfile": {
"Ref": "WebServerInstanceRoleProfile"
},
"UserData": {
"Fn::Base64": {
"Fn::Join": [
"\n",
[
"#!/bin/bash",
"",
"# If we receive an error, we want to fail completely - rather than continue in a way that might be",
"# insecure or unreliable",
"set -x",
"set -e",
"set -o pipefail",
"",
"################################################################################",
"# Settings - versions of packages etc required",
"################################################################################",
"",
"# Working directory - where we store all temporary files",
"CLOUD_INIT_DIR=/var/cloud-init",
"",
"# Ansible version",
"ANSIBLE_DEB_NAME=ansible_1.9.1-1ppa~trusty_all.deb",