t/cfn_yaml/AutoScalingRollingUpdates.yaml

AWSTemplateFormatVersion: '2010-09-09'
Metadata: 
  License: Apache-2.0
Description: 'AWS CloudFormation Sample Template ELBGuidedAutoScalingRollingUpdates:
  This example creates an auto scaling group behind a load balancer with a simple
  health check. The Auto Scaling launch configuration includes an update policy that
  will keep 2 instances running while doing an autoscaling rolling update. The update
  will roll forward only when the ELB health check detects an updated instance in-service.
  **WARNING** This template creates one or more Amazon EC2  instances and an Elastic
  Load Balancer. You will be billed for the AWS resources used if you create a stack
  from this template.'
Parameters:
  InstanceType:
    Description: WebServer EC2 instance type
    Type: String
    Default: t2.small
    AllowedValues: [t1.micro, t2.nano, t2.micro, t2.small, t2.medium, t2.large, m1.small,
      m1.medium, m1.large, m1.xlarge, m2.xlarge, m2.2xlarge, m2.4xlarge, m3.medium,
      m3.large, m3.xlarge, m3.2xlarge, m4.large, m4.xlarge, m4.2xlarge, m4.4xlarge,
      m4.10xlarge, c1.medium, c1.xlarge, c3.large, c3.xlarge, c3.2xlarge, c3.4xlarge,
      c3.8xlarge, c4.large, c4.xlarge, c4.2xlarge, c4.4xlarge, c4.8xlarge, g2.2xlarge,
      g2.8xlarge, r3.large, r3.xlarge, r3.2xlarge, r3.4xlarge, r3.8xlarge, i2.xlarge,
      i2.2xlarge, i2.4xlarge, i2.8xlarge, d2.xlarge, d2.2xlarge, d2.4xlarge, d2.8xlarge,
      hi1.4xlarge, hs1.8xlarge, cr1.8xlarge, cc2.8xlarge, cg1.4xlarge]
    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
    ConstraintDescription: must be the name of an existing EC2 KeyPair.
  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.
Mappings:
  AWSInstanceType2Arch:
    t1.micro:
      Arch: PV64
    t2.nano:
      Arch: HVM64
    t2.micro:
      Arch: HVM64
    t2.small:
      Arch: HVM64
    t2.medium:
      Arch: HVM64
    t2.large:
      Arch: HVM64
    m1.small:
      Arch: PV64
    m1.medium:
      Arch: PV64
    m1.large:
      Arch: PV64
    m1.xlarge:
      Arch: PV64
    m2.xlarge:
      Arch: PV64
    m2.2xlarge:
      Arch: PV64
    m2.4xlarge:
      Arch: PV64
    m3.medium:
      Arch: HVM64
    m3.large:
      Arch: HVM64
    m3.xlarge:
      Arch: HVM64
    m3.2xlarge:
      Arch: HVM64
    m4.large:
      Arch: HVM64
    m4.xlarge:
      Arch: HVM64
    m4.2xlarge:
      Arch: HVM64
    m4.4xlarge:
      Arch: HVM64
    m4.10xlarge:
      Arch: HVM64
    c1.medium:
      Arch: PV64
    c1.xlarge:
      Arch: PV64
    c3.large:
      Arch: HVM64
    c3.xlarge:
      Arch: HVM64
    c3.2xlarge:
      Arch: HVM64
    c3.4xlarge:
      Arch: HVM64
    c3.8xlarge:
      Arch: HVM64
    c4.large:
      Arch: HVM64
    c4.xlarge:
      Arch: HVM64
    c4.2xlarge:
      Arch: HVM64
    c4.4xlarge:
      Arch: HVM64
    c4.8xlarge:
      Arch: HVM64
    g2.2xlarge:
      Arch: HVMG2
    g2.8xlarge:
      Arch: HVMG2
    r3.large:
      Arch: HVM64
    r3.xlarge:
      Arch: HVM64
    r3.2xlarge:
      Arch: HVM64
    r3.4xlarge:
      Arch: HVM64
    r3.8xlarge:
      Arch: HVM64
    i2.xlarge:
      Arch: HVM64
    i2.2xlarge:
      Arch: HVM64
    i2.4xlarge:
      Arch: HVM64
    i2.8xlarge:
      Arch: HVM64
    d2.xlarge:
      Arch: HVM64
    d2.2xlarge:
      Arch: HVM64
    d2.4xlarge:
      Arch: HVM64
    d2.8xlarge:
      Arch: HVM64
    hi1.4xlarge:
      Arch: HVM64
    hs1.8xlarge:
      Arch: HVM64
    cr1.8xlarge:
      Arch: HVM64
    cc2.8xlarge:
      Arch: HVM64
  AWSInstanceType2NATArch:
    t1.micro:
      Arch: NATPV64
    t2.nano:
      Arch: NATHVM64
    t2.micro:
      Arch: NATHVM64
    t2.small:
      Arch: NATHVM64
    t2.medium:
      Arch: NATHVM64
    t2.large:
      Arch: NATHVM64
    m1.small:
      Arch: NATPV64
    m1.medium:
      Arch: NATPV64
    m1.large:
      Arch: NATPV64
    m1.xlarge:
      Arch: NATPV64
    m2.xlarge:
      Arch: NATPV64
    m2.2xlarge:
      Arch: NATPV64
    m2.4xlarge:
      Arch: NATPV64
    m3.medium:
      Arch: NATHVM64
    m3.large:
      Arch: NATHVM64
    m3.xlarge:
      Arch: NATHVM64
    m3.2xlarge:
      Arch: NATHVM64
    m4.large:
      Arch: NATHVM64
    m4.xlarge:
      Arch: NATHVM64
    m4.2xlarge:
      Arch: NATHVM64
    m4.4xlarge:
      Arch: NATHVM64
    m4.10xlarge:
      Arch: NATHVM64
    c1.medium:
      Arch: NATPV64
    c1.xlarge:
      Arch: NATPV64
    c3.large:
      Arch: NATHVM64
    c3.xlarge:
      Arch: NATHVM64
    c3.2xlarge:
      Arch: NATHVM64
    c3.4xlarge:
      Arch: NATHVM64
    c3.8xlarge:
      Arch: NATHVM64
    c4.large:
      Arch: NATHVM64
    c4.xlarge:
      Arch: NATHVM64
    c4.2xlarge:
      Arch: NATHVM64
    c4.4xlarge:
      Arch: NATHVM64
    c4.8xlarge:
      Arch: NATHVM64
    g2.2xlarge:
      Arch: NATHVMG2
    g2.8xlarge:
      Arch: NATHVMG2
    r3.large:
      Arch: NATHVM64
    r3.xlarge:
      Arch: NATHVM64
    r3.2xlarge:
      Arch: NATHVM64
    r3.4xlarge:
      Arch: NATHVM64
    r3.8xlarge:
      Arch: NATHVM64
    i2.xlarge:
      Arch: NATHVM64
    i2.2xlarge:
      Arch: NATHVM64
    i2.4xlarge:
      Arch: NATHVM64
    i2.8xlarge:
      Arch: NATHVM64
    d2.xlarge:
      Arch: NATHVM64
    d2.2xlarge:
      Arch: NATHVM64
    d2.4xlarge:
      Arch: NATHVM64
    d2.8xlarge:
      Arch: NATHVM64
    hi1.4xlarge:
      Arch: NATHVM64
    hs1.8xlarge:
      Arch: NATHVM64
    cr1.8xlarge:
      Arch: NATHVM64
    cc2.8xlarge:
      Arch: NATHVM64
  AWSRegionArch2AMI:
    us-east-1:
      PV64: ami-2a69aa47
      HVM64: ami-6869aa05
      HVMG2: ami-a41a3fb3
    us-west-2:
      PV64: ami-7f77b31f
      HVM64: ami-7172b611
      HVMG2: ami-caf253aa
    us-west-1:
      PV64: ami-a2490dc2
      HVM64: ami-31490d51
      HVMG2: ami-00347e60
    eu-west-1:
      PV64: ami-4cdd453f
      HVM64: ami-f9dd458a
      HVMG2: ami-e2f7bd91
    eu-west-2:
      PV64: NOT_SUPPORTED
      HVM64: ami-886369ec
      HVMG2: NOT_SUPPORTED
    eu-central-1:
      PV64: ami-6527cf0a
      HVM64: ami-ea26ce85
      HVMG2: ami-d2ff04bd
    ap-northeast-1:
      PV64: ami-3e42b65f
      HVM64: ami-374db956
      HVMG2: ami-4c78d52d
    ap-northeast-2:
      PV64: NOT_SUPPORTED
      HVM64: ami-2b408b45
      HVMG2: NOT_SUPPORTED
    ap-southeast-1:
      PV64: ami-df9e4cbc
      HVM64: ami-a59b49c6
      HVMG2: ami-f3f95990
    ap-southeast-2:
      PV64: ami-63351d00
      HVM64: ami-dc361ebf
      HVMG2: ami-3a122e59
    ap-south-1:
      PV64: NOT_SUPPORTED
      HVM64: ami-ffbdd790
      HVMG2: ami-21a7d34e
    us-east-2:
      PV64: NOT_SUPPORTED
      HVM64: ami-f6035893
      HVMG2: NOT_SUPPORTED
    ca-central-1:
      PV64: NOT_SUPPORTED
      HVM64: ami-730ebd17
      HVMG2: NOT_SUPPORTED
    sa-east-1:
      PV64: ami-1ad34676
      HVM64: ami-6dd04501
      HVMG2: NOT_SUPPORTED
    cn-north-1:
      PV64: ami-77559f1a
      HVM64: ami-8e6aa0e3
      HVMG2: NOT_SUPPORTED
Resources:
  WebServerGroup:
    Type: AWS::AutoScaling::AutoScalingGroup
    CreationPolicy:
      ResourceSignal:
        Timeout: PT15M
        Count: '2'
    UpdatePolicy:
      AutoScalingRollingUpdate:
        MaxBatchSize: '1'
        MinInstancesInService: '1'
        PauseTime: PT15M
        WaitOnResourceSignals: 'true'
    Properties:
      AvailabilityZones: !GetAZs ''
      LaunchConfigurationName: !Ref 'LaunchConfig'
      MinSize: '2'
      MaxSize: '4'
      LoadBalancerNames: [!Ref 'ElasticLoadBalancer']
  LaunchConfig:
    Type: AWS::AutoScaling::LaunchConfiguration
    Metadata:
      AWS::CloudFormation::Init:
        configSets:
          full_install: [install_cfn, install_app, verify_instance_health]
        install_cfn:
          files:
            /etc/cfn/cfn-hup.conf:
              content: !Sub |
                [main]
                stack=${AWS::StackId}
                region=${AWS::Region}
              mode: '000400'
              owner: root
              group: root
            /etc/cfn/hooks.d/cfn-auto-reloader.conf:
              content: !Sub |
                [cfn-auto-reloader-hook]
                triggers=post.update
                path=Resources.LaunchConfig.Metadata.AWS::CloudFormation::Init
                action=/opt/aws/bin/cfn-init -v --stack ${AWS::StackName} --resource LaunchConfig --configsets full_install --region ${AWS::Region}
                runas=root
          services:
            sysvinit:
              cfn-hup:
                enabled: 'true'
                ensureRunning: 'true'
                files: [/etc/cfn/cfn-hup.conf, /etc/cfn/hooks.d/cfn-auto-reloader.conf]
        install_app:
          packages:
            yum:
              httpd: []
          files:
            /var/www/html/index.html:
              content: !Join
                - ''
                - - '<h1>Congratulations, you have successfully launched the AWS CloudFormation sample.</h1>'
                  - '<p>Version: 1.0</p>'
              mode: '000644'
              owner: root
              group: root
          services:
            sysvinit:
              httpd:
                enabled: 'true'
                ensureRunning: 'true'
        verify_instance_health:
          commands:
            ELBHealthCheck:
              command: !Sub
                'until [ "$state" == "\"InService\"" ]; do state=$(aws --region ${AWS::Region} elb describe-instance-health
                 --load-balancer-name ${ElasticLoadBalancer}
                 --instances $(curl -s http://169.254.169.254/latest/meta-data/instance-id)
                 --query InstanceStates[0].State); sleep 10; done'
    Properties:
      KeyName: !Ref 'KeyName'
      ImageId: !FindInMap [AWSRegionArch2AMI, !Ref 'AWS::Region', !FindInMap [AWSInstanceType2Arch,
          !Ref 'InstanceType', Arch]]
      InstanceType: !Ref 'InstanceType'
      SecurityGroups: [!Ref 'InstanceSecurityGroup']
      IamInstanceProfile: !Ref 'WebServerInstanceProfile'
      UserData:
        Fn::Base64: !Sub |
          #!/bin/bash -xe
          yum install -y aws-cfn-bootstrap
          /opt/aws/bin/cfn-init -v --stack ${AWS::StackId} --resource LaunchConfig --configsets full_install --region ${AWS::Region}
          /opt/aws/bin/cfn-signal -e $? --stack ${AWS::StackId} --resource WebServerGroup --region ${AWS::Region}
  ElasticLoadBalancer:
    Type: AWS::ElasticLoadBalancing::LoadBalancer
    Properties:
      AvailabilityZones: !GetAZs ''
      CrossZone: 'true'
      Listeners:
      - LoadBalancerPort: '80'
        InstancePort: '80'
        Protocol: HTTP
      HealthCheck:
        Target: HTTP:80/
        HealthyThreshold: '3'
        UnhealthyThreshold: '5'
        Interval: '30'
        Timeout: '5'
  InstanceSecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: Enable SSH access and HTTP access on the configured port
      SecurityGroupIngress:
      - IpProtocol: tcp
        FromPort: '22'
        ToPort: '22'
        CidrIp: !Ref 'SSHLocation'
      - IpProtocol: tcp
        FromPort: '80'
        ToPort: '80'
        CidrIp: 0.0.0.0/0
  WebServerInstanceProfile:
    Type: AWS::IAM::InstanceProfile
    Properties:
      Path: /
      Roles: [!Ref 'DescribeHealthRole']
  DescribeHealthRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Statement:
        - Effect: Allow
          Principal:
            Service: [ec2.amazonaws.com]
          Action: ['sts:AssumeRole']
      Path: /
      Policies:
      - PolicyName: describe-instance-health-policy
        PolicyDocument:
          Statement:
          - Effect: Allow
            Action: ['elasticloadbalancing:DescribeInstanceHealth']
            Resource: '*'
Outputs:
  URL:
    Description: URL of the website
    Value: !Join ['', ['http://', !GetAtt [ElasticLoadBalancer, DNSName]]]
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