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app-stack.json
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app-stack.json
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{
"AWSTemplateFormatVersion": "2010-09-09",
"Description": "AWS CloudFormation template that creates launch templates, Auto Scaling groups, and application load balancers.",
"Parameters": {
"ALBCertificateArn": {
"Description": "ARN of ACM TLS certificate",
"Type": "String",
"Default": "arn:aws:acm:us-east-1:158826777352:certificate/0efe7d19-57a5-450f-a8e9-0992add78a55",
"ConstraintDescription": "must be a valid ARN"
},
"WebTierInstanceType": {
"Description": "Webserver EC2 instance type",
"Type": "String",
"Default": "t3.micro",
"AllowedValues": [
"t2.micro",
"t3.micro"
],
"ConstraintDescription": "must be a valid EC2 instance type."
},
"AppTierInstanceType": {
"Description": "App server EC2 instance type",
"Type": "String",
"Default": "t3.micro",
"AllowedValues": [
"t2.micro",
"t3.micro"
],
"ConstraintDescription": "must be a valid EC2 instance type."
},
"KeyName": {
"Description": "Name of an existing EC2 KeyPair to enable SSH access to the instances",
"Type": "AWS::EC2::KeyPair::KeyName",
"Default": "ccnetkeypair",
"ConstraintDescription": "must be the name of an existing EC2 KeyPair."
},
"NetworkStackTemplateURL": {
"Description": "URL of CF template for the network stack",
"Type": "String",
"AllowedPattern": "https:\\/\\/?[-a-zA-Z0-9@:%._\\+~#=]{2,256}\\.[a-z]{2,6}\\b([-a-zA-Z0-9@:%_\\+.~#?&//=]*)",
"Default": "https://s3.amazonaws.com/benpiper.com-cftemplates/network-stack.json",
"ConstraintDescription": "must be a valid URL"
},
"SSHLocation": {
"Description": " The IP address range that can be used to SSH to the EC2 instances",
"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."
},
"WebserverCapacity": {
"Default": "2",
"Description": "The initial nuber of Webserver instances",
"Type": "Number",
"MinValue": "1",
"MaxValue": "6",
"ConstraintDescription": "must be between 1 and 6 EC2 instances."
},
"AppserverCapacity": {
"Default": "2",
"Description": "The initial nuber of Webserver instances",
"Type": "Number",
"MinValue": "1",
"MaxValue": "2",
"ConstraintDescription": "must be between 1 and 2 EC2 instances."
}
},
"Resources": {
"NetworkStack" : {
"Type" : "AWS::CloudFormation::Stack",
"Properties" : {
"TemplateURL" : {
"Ref": "NetworkStackTemplateURL"
}
}
},
"WebTierLoadBalancer": {
"Type": "AWS::ElasticLoadBalancingV2::LoadBalancer",
"Properties": {
"Name": { "Fn::Join": ["", [ "webtier-", { "Ref": "AWS::StackName" }]]},
"Subnets": [
{ "Fn::GetAtt" : [ "NetworkStack", "Outputs.PublicSubnetAID" ] },
{ "Fn::GetAtt" : [ "NetworkStack", "Outputs.PublicSubnetBID" ] }
],
"SecurityGroups": [ { "Ref" : "WebserverSecurityGroup" } ]
}
},
"WebTierALBListener": {
"Type": "AWS::ElasticLoadBalancingV2::Listener",
"Properties": {
"DefaultActions": [
{
"Type": "forward",
"TargetGroupArn": {
"Ref": "WebTierALBTargetGroup"
}
}
],
"LoadBalancerArn": {
"Ref": "WebTierLoadBalancer"
},
"Port": "443",
"Protocol": "HTTPS",
"Certificates": [{
"CertificateArn" : {
"Ref": "ALBCertificateArn"
}
}]
}
},
"WebTierALBTargetGroup": {
"Type": "AWS::ElasticLoadBalancingV2::TargetGroup",
"Properties": {
"VpcId": { "Fn::GetAtt" : [ "NetworkStack", "Outputs.VPCID" ] },
"HealthCheckIntervalSeconds": 10,
"HealthCheckTimeoutSeconds": 5,
"HealthyThresholdCount": 2,
"Port": 80,
"Protocol": "HTTP",
"UnhealthyThresholdCount": 5,
"TargetGroupAttributes": [
{
"Key": "deregistration_delay.timeout_seconds",
"Value": "20"
},
{
"Key": "stickiness.enabled",
"Value": "true"
},
{
"Key": "stickiness.type",
"Value": "lb_cookie"
},
{
"Key": "stickiness.lb_cookie.duration_seconds",
"Value": "30"
}
]
}
},
"WebserverGroup": {
"Type": "AWS::AutoScaling::AutoScalingGroup",
"Properties": {
"VPCZoneIdentifier": [
{ "Fn::GetAtt" : [ "NetworkStack", "Outputs.PublicSubnetAID" ] },
{ "Fn::GetAtt" : [ "NetworkStack", "Outputs.PublicSubnetBID" ] }
],
"LaunchTemplate": {
"LaunchTemplateId" : { "Ref": "WebserverLaunchTemplate" },
"Version" : "1"
},
"MinSize": "2",
"MaxSize": "4",
"DesiredCapacity": {
"Ref": "WebserverCapacity"
},
"TargetGroupARNs": [
{
"Ref": "WebTierALBTargetGroup"
}
],
"HealthCheckType": "ELB",
"HealthCheckGracePeriod":300
},
"CreationPolicy": {
"ResourceSignal": {
"Timeout": "PT10M",
"Count": {
"Ref": "WebserverCapacity"
}
}
},
"UpdatePolicy": {
"AutoScalingRollingUpdate": {
"MinInstancesInService": "1",
"MaxBatchSize": "1",
"PauseTime": "PT15M",
"WaitOnResourceSignals": "true"
}
}
},
"WebserverLaunchTemplate": {
"Type": "AWS::EC2::LaunchTemplate",
"Metadata": {
"Comment1": "Configure the web server launch template"
},
"Properties": {
"LaunchTemplateData": {
"ImageId": "ami-01d025118d8e760db",
"InstanceType": {
"Ref": "WebTierInstanceType"
},
"SecurityGroupIds": [
{
"Ref": "WebserverSecurityGroup"
}
],
"KeyName": {
"Ref": "KeyName"
},
"UserData": {
"Fn::Base64": {
"Fn::Join": [
"",
[
"#!/bin/bash\n",
"sudo yum -y install docker aws-cfn-bootstrap\n",
"sudo service docker start\n",
"sudo docker run -d -p 80:80 -e APPSERVER='http://", {"Fn::GetAtt": [
"AppTierLoadBalancer",
"DNSName"
]}, ":8080' benpiper/mtwa:web\n",
"/opt/aws/bin/cfn-signal -e 0 --stack ", { "Ref": "AWS::StackName" }," --resource WebserverGroup\n"
]
]
}
}
}
}
},
"WebTierAutoScalingPolicy": {
"Type":"AWS::AutoScaling::ScalingPolicy",
"Properties":{
"AutoScalingGroupName":{
"Ref":"WebserverGroup"
},
"PolicyType":"TargetTrackingScaling",
"TargetTrackingConfiguration":{
"PredefinedMetricSpecification":{
"PredefinedMetricType":"ASGAverageCPUUtilization"
},
"TargetValue": "75"
}
}
},
"WebserverSecurityGroup" : {
"Type" : "AWS::EC2::SecurityGroup",
"Properties" : {
"GroupDescription" : "Web server security group",
"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"
},
{
"IpProtocol": "tcp",
"FromPort": "22",
"ToPort": "22",
"CidrIp": {
"Ref": "SSHLocation"
}
}
],
"VpcId": {
"Fn::GetAtt" : [ "NetworkStack", "Outputs.VPCID" ] }
}
},
"AppTierLoadBalancer": {
"Type": "AWS::ElasticLoadBalancingV2::LoadBalancer",
"Properties": {
"Name": { "Fn::Join": ["", [ "apptier-", { "Ref": "AWS::StackName" }]]},
"Scheme": "internal",
"Subnets": [
{ "Fn::GetAtt" : [ "NetworkStack", "Outputs.PrivateSubnetAID" ] },
{ "Fn::GetAtt" : [ "NetworkStack", "Outputs.PrivateSubnetBID" ] }
],
"SecurityGroups": [ {"Ref" : "AppserverSecurityGroup" } ]
}
},
"AppTierALBListener": {
"Type": "AWS::ElasticLoadBalancingV2::Listener",
"Properties": {
"DefaultActions": [
{
"Type": "forward",
"TargetGroupArn": {
"Ref": "AppTierALBTargetGroup"
}
}
],
"LoadBalancerArn": {
"Ref": "AppTierLoadBalancer"
},
"Port": "8080",
"Protocol": "HTTP"
}
},
"AppTierALBTargetGroup": {
"Type": "AWS::ElasticLoadBalancingV2::TargetGroup",
"Properties": {
"VpcId": { "Fn::GetAtt" : [ "NetworkStack", "Outputs.VPCID" ] },
"HealthCheckIntervalSeconds": 10,
"HealthCheckTimeoutSeconds": 5,
"HealthyThresholdCount": 2,
"Port": 8080,
"Protocol": "HTTP",
"UnhealthyThresholdCount": 5,
"TargetGroupAttributes": [
{
"Key": "deregistration_delay.timeout_seconds",
"Value": "20"
},
{
"Key": "stickiness.enabled",
"Value": "true"
},
{
"Key": "stickiness.type",
"Value": "lb_cookie"
},
{
"Key": "stickiness.lb_cookie.duration_seconds",
"Value": "30"
}
]
}
},
"AppserverGroup": {
"Type": "AWS::AutoScaling::AutoScalingGroup",
"Properties": {
"VPCZoneIdentifier": [
{ "Fn::GetAtt" : [ "NetworkStack", "Outputs.PrivateSubnetAID" ] },
{ "Fn::GetAtt" : [ "NetworkStack", "Outputs.PrivateSubnetBID" ] }
],
"LaunchTemplate": {
"LaunchTemplateId" : { "Ref": "AppserverLaunchTemplate" },
"Version" : "1"
},
"MinSize": "1",
"MaxSize": "2",
"DesiredCapacity": {
"Ref": "AppserverCapacity"
},
"TargetGroupARNs": [
{
"Ref": "AppTierALBTargetGroup"
}
],
"HealthCheckType": "ELB",
"HealthCheckGracePeriod":300
},
"UpdatePolicy": {
"AutoScalingRollingUpdate": {
"MinInstancesInService": "1",
"MaxBatchSize": "1",
"PauseTime": "PT15M",
"WaitOnResourceSignals": "true"
}
}
},
"AppserverLaunchTemplate": {
"Type": "AWS::EC2::LaunchTemplate",
"Metadata": {
"Comment1": "Configure the app server launch template"
},
"Properties": {
"LaunchTemplateData": {
"ImageId": "ami-01d025118d8e760db",
"InstanceType": {
"Ref": "AppTierInstanceType"
},
"SecurityGroupIds": [
{
"Ref": "AppserverSecurityGroup"
}
],
"KeyName": {
"Ref": "KeyName"
},
"UserData": {
"Fn::Base64": {
"Fn::Join": [
"",
[
"#!/bin/bash\n",
"sudo yum -y install docker aws-cfn-bootstrap\n",
"sudo service docker start\n",
"sudo docker run -d -p 8080:8080 benpiper/mtwa:app\n",
"/opt/aws/bin/cfn-signal -e 0 --stack ", { "Ref": "AWS::StackName" }," --resource AppserverGroup\n"
]
]
}
}
}
}
},
"AppserverSecurityGroup" : {
"Type" : "AWS::EC2::SecurityGroup",
"Properties" : {
"GroupDescription" : "App server security group",
"VpcId": {
"Fn::GetAtt" : [ "NetworkStack", "Outputs.VPCID" ] }
}
},
"AppserverSecurityGroupIngress": {
"Type": "AWS::EC2::SecurityGroupIngress",
"Properties": {
"IpProtocol": "tcp",
"FromPort": "8080",
"ToPort": "8080",
"CidrIp": "0.0.0.0/0",
"GroupId": { "Fn::GetAtt": [ "AppserverSecurityGroup", "GroupId" ] }
}
}
},
"Outputs": {
"WebsiteURL": {
"Description": "URL for public ALB",
"Value": {
"Fn::Join": [
"",
[
"https://",
{
"Fn::GetAtt": [
"WebTierLoadBalancer",
"DNSName"
]
}
]
]
}
}
}
}