apache_single_instance_aws.yaml

# http://docs.openstack.org/developer/heat/template_guide/hot_spec.html#heat-template-version
heat_template_version: 2014-10-16


description: Install Apache on a single Debian instance using the AWS::EC2::Instance type.


parameters:

  key_name:
    type: string
    label: Key Name
    description: Name of an existing KeyPair to enable SSH access to the instances. 
    
  image_name:
    type: string
    label: Image ID
    description: Image to be used for compute instance
    default: Debian_8
    constraints:
      - allowed_values: [ Debian_7, Debian_8 ]
        description: Value must be one of Debian_6, Debian_7 or Debian_8

  instance_type:
    type: string
    description: The NeCTAR flavour the webserver is to run on
    default: m2.xsmall
    constraints:
      - allowed_values: [m2.xsmall, m2.small, m1.small]
        description:
          Must be a valid NeCTAR flavour, limited to the smaller ones available


resources:

  # Use this when we do not have Neutron networking.
  # http://docs.openstack.org/developer/heat/template_guide/cfn.html#AWS::EC2::SecurityGroup
  web_security_group:
    type: AWS::EC2::SecurityGroup
    properties:
      GroupDescription: Web server access rules.
      SecurityGroupIngress:
        - {IpProtocol: icmp, FromPort: '-1', ToPort: '-1', CidrIp : 0.0.0.0/0}
        - {IpProtocol: tcp, FromPort: '22', ToPort: '22', CidrIp: 0.0.0.0/0}
        - {IpProtocol: tcp, FromPort: '80', ToPort: '80', CidrIp: 0.0.0.0/0}
        - {IpProtocol: tcp, FromPort: '443', ToPort: '443', CidrIp: 0.0.0.0/0}
    
  apache_server:
    # http://docs.openstack.org/developer/heat/template_guide/cfn.html#AWS::EC2::Instance
    type: AWS::EC2::Instance
    # A deletion policy of Retain will leave this instance behind when this template is torn down.
    # deletion_policy: Retain
    metadata:
      AWS::CloudFormation::Init:
        config:
          packages:
            apt:
              apache2: []
          services:
            systemd:
              apache2: {enabled: 'true', ensureRunning: 'true'}
    properties:
      ImageId:
        Fn::Select:
          - { get_param: image_name }
          -
            Debian_7: 6917afc4-1732-4ca2-aa11-09a289a8494e
            Debian_8: daf6e64d-10d1-4038-a6f8-bf51c112a8cd
      InstanceType: { get_param: instance_type }
      KeyName: { get_param: key_name }
      SecurityGroups: [ get_resource: web_security_group ]
      # the following is written to /var/lib/cloud/data/cfn-userdata
      # note the call to cfn-init which causes the AWS::CloudFomration::Init to be actioned
      UserData:
        str_replace:
          template: |
            #!/bin/bash -v
            /usr/bin/cfn-init
            # now signal the install is finished
            /opt/aws/bin/cfn-signal -e 0 -r "Command line tools server setup complete" 'WaitHandle'
          params:
            WaitHandle: { get_resource: wait_handle }

  # http://docs.openstack.org/developer/heat/template_guide/cfn.html#AWS::CloudFormation::WaitConditionHandle
  wait_handle:
    type: 'AWS::CloudFormation::WaitConditionHandle'

  # http://docs.openstack.org/developer/heat/template_guide/cfn.html#AWS::CloudFormation::WaitCondition
  wait_condition:
    type: AWS::CloudFormation::WaitCondition
    depends_on: apache_server
    properties:
      Handle: { get_resource: wait_handle }
      Count: 1
      # we'll give it 10 minutes
      Timeout: 600
      
outputs:

    instance_ip:
        description: The IP address of the deployed instance
        value: { get_attr: [apache_server, PublicIp] }

    website_url:
        description: URL for Apache server
        value: 
            list_join: ['', ['http://', get_attr: [apache_server, PublicIp]]]