typhoon.aws

##
##   Copyright 2015 Zalando SE
##
##   Licensed under the Apache License, Version 2.0 (the "License");
##   you may not use this file except in compliance with the License.
##   You may obtain a copy of the License at
##
##       http://www.apache.org/licenses/LICENSE-2.0
##
##   Unless required by applicable law or agreed to in writing, software
##   distributed under the License is distributed on an "AS IS" BASIS,
##   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
##   See the License for the specific language governing permissions and
##   limitations under the License.
##
## @doc
##   aws cloud formation template (spot fleet)
AWSTemplateFormatVersion: "2010-09-09"
Description: | 
  Typhoon cluster. 

Parameters:
  ##
  ## define ami config (default 2016.03)
  ## see https://aws.amazon.com/amazon-linux-ami/ 
  AMI:
    Description: ec2 ami 
    Type: String
    Default: ami-f9dd458a

  ##
  ## define instance type
  EC2: 
    Description: ec2 instance type
    Type: String
    Default : t2.micro
    AllowedValues : 
      - t2.micro
      - m3.medium
      - m3.large

  ##
  ##
  CAPACITY:
    Description: cluster compute capacity (number of nodes) 
    Type: Number
    Default: 1

  ##
  ## name of ssh key associated with instances
  SSH:
    Description: ssh key
    Type: String

  ##
  ## environment prefix (e.g. dev, stage, live, etc)
  ENV:
    Description: environment
    Type: String
    Default: dev

  ##
  ## typhoon version
  VSN:
    Description: typhoon version
    Type: String
    Default: "0.7.2"

  ##
  ## typhoon version
  SUBNET:
    Description: vpc subnet
    Type: String


Resources:

  ##
  ##
  AutoScale:
    Type: AWS::AutoScaling::AutoScalingGroup
    Properties:
      LaunchConfigurationName:
        Ref: Cluster
      MinSize:
        Ref: CAPACITY
      MaxSize:
        Ref: CAPACITY
      VPCZoneIdentifier: 
        - Ref: SUBNET

  ##
  ## typhoon cluster is defined using spot fleet resource
  Cluster:
    Type: "AWS::AutoScaling::LaunchConfiguration"
    Properties:
      ImageId:
        Ref: AMI
      KeyName:
        Ref: SSH
      InstanceType:
        Ref: EC2
      SecurityGroups:
        - 
          Fn::GetAtt:
            - ClusterSg
            - GroupId
      IamInstanceProfile:
        Fn::GetAtt:
          - ClusterProfile
          - Arn
      UserData:
        Fn::Base64:
          Fn::Join:
            - 
              ""
            -
              - "#!/bin/sh -xe\n"
              - "yum update -y aws-cfn-bootstrap\n"
              - "/opt/aws/bin/cfn-init -v "
              - " --region "
              - Ref: AWS::Region
              - " --stack  "
              - Ref: AWS::StackName
              - " --resource Cluster "
              - " --configsets Bootstrap"

    Metadata:
      ##
      ## node bootstrap process
      ## http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-init.html
      AWS::CloudFormation::Init:
        configSets:
          Bootstrap:
            - Typhoon

          ##
          ## Typhoon node configuration 
          Typhoon:
            files:
              ## config file, installs Typhoon application 
              /config.sh:
                content:
                  Fn::Join:
                    -
                      ""
                    -
                      - "#!/bin/sh -xe\n"
                      - "curl -L -o /typhoon.bundle https://github.com/zalando/typhoon/releases/download/"
                      - Ref: VSN
                      - "/typhoon-"
                      - Ref: VSN
                      - ".x86_64.Linux.bundle"
                      - "\n"
                      - "bash /typhoon.bundle"
                      - "\n"
                      - "/etc/init.d/typhoon start"
                      - "\n"

            commands:
              01-init:
                command: "sh /config.sh"

  ##
  ##
  ClusterSg:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: Typhoon cluster network security
      SecurityGroupIngress:
        -
          IpProtocol: tcp 
          FromPort: 22
          ToPort: 22
          CidrIp: 0.0.0.0/0
        -
          IpProtocol: tcp 
          FromPort: 8080
          ToPort: 8080
          CidrIp: 0.0.0.0/0
        -
          IpProtocol: tcp
          FromPort: 4369
          ToPort: 4369
          CidrIp: 0.0.0.0/0
        -
          IpProtocol: tcp
          FromPort: 32100
          ToPort: 32199
          CidrIp: 0.0.0.0/0

  ##
  ##
  ClusterRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          -
            Effect: Allow
            Principal:
              Service: ec2.amazonaws.com
            Action: sts:AssumeRole
      Path: /
      Policies:
        -
          PolicyName: ClusterPolicy
          PolicyDocument:
            Version: "2012-10-17"
            Statement:
              -
                Effect: Allow
                Action: ec2:*
                Resource: "*"
              -  
                Effect: Allow
                Action: elasticloadbalancing:*
                Resource: "*"

  ##
  ##
  ClusterProfile:
    Type: AWS::IAM::InstanceProfile
    Properties:
      Path: "/"
      Roles:
        -
          Ref: ClusterRole