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HeatTemplateFormatVersion: '2012-12-12'
Description: AWS CloudFormation Sample Template
Parameters:
KeyName: {Description: Name of an existing EC2 KeyPair
to enable SSH access to the instances, Type: String}
InstanceType:
Description: WebServer EC2 instance type
Type: String
Default: m1.small
AllowedValues: [m1.tiny, m1.small, m1.medium, m1.large, m1.xlarge]
ConstraintDescription: must be a valid EC2 instance type.
DBName: {Default: wordpress, Description: The
WordPress database name, Type: String, MinLength: '1',
MaxLength: '64', AllowedPattern: '[a-zA-Z][a-zA-Z0-9]*',
ConstraintDescription: must begin with a letter and contain only
alphanumeric characters.}
DBUsername: {Default: admin, NoEcho: 'true',
Description: The WordPress database admin account username, Type: String,
MinLength: '1', MaxLength: '16', AllowedPattern: '[a-zA-Z][a-zA-Z0-9]*',
ConstraintDescription: must begin with a letter and contain only
alphanumeric characters.}
DBPassword: {Default: admin, NoEcho: 'true',
Description: The WordPress database admin account password, Type: String,
MinLength: '1', MaxLength: '41', AllowedPattern: '[a-zA-Z0-9]*',
ConstraintDescription: must contain only alphanumeric characters.}
DBRootPassword: {Default: admin, NoEcho: 'true',
Description: Root password for MySQL, Type: String,
MinLength: '1', MaxLength: '41', AllowedPattern: '[a-zA-Z0-9]*',
ConstraintDescription: must contain only alphanumeric characters.}
LinuxDistribution:
Default: F17
Description: Distribution of choice
Type: String
AllowedValues: [F18, F17, U10, RHEL-6.1, RHEL-6.2, RHEL-6.3]
Mappings:
AWSInstanceType2Arch:
m1.tiny: {Arch: '32'}
m1.small: {Arch: '64'}
m1.medium: {Arch: '64'}
m1.large: {Arch: '64'}
m1.xlarge: {Arch: '64'}
DistroArch2AMI:
F18: {'32': F18-i386-cfntools, '64': F18-x86_64-cfntools}
F17: {'32': F17-i386-cfntools, '64': F17-x86_64-cfntools}
U10: {'32': U10-i386-cfntools, '64': U10-x86_64-cfntools}
RHEL-6.1: {'32': rhel61-i386-cfntools, '64': rhel61-x86_64-cfntools}
RHEL-6.2: {'32': rhel62-i386-cfntools, '64': rhel62-x86_64-cfntools}
RHEL-6.3: {'32': rhel63-i386-cfntools, '64': rhel63-x86_64-cfntools}
Resources:
CfnUser: {Type: 'AWS::IAM::User'}
WebServerKeys:
Type: AWS::IAM::AccessKey
Properties:
UserName: {Ref: CfnUser}
WebServerGroup:
Type: AWS::AutoScaling::AutoScalingGroup
Properties:
AvailabilityZones: {'Fn::GetAZs': ''}
LaunchConfigurationName: {Ref: LaunchConfig}
MinSize: '1'
MaxSize: '3'
LoadBalancerNames:
- {Ref: ElasticLoadBalancer}
WebServerScaleUpPolicy:
Type: AWS::AutoScaling::ScalingPolicy
Properties:
AdjustmentType: ChangeInCapacity
AutoScalingGroupName: {Ref: WebServerGroup}
Cooldown: '60'
ScalingAdjustment: '1'
WebServerScaleDownPolicy:
Type: AWS::AutoScaling::ScalingPolicy
Properties:
AdjustmentType: ChangeInCapacity
AutoScalingGroupName: {Ref: WebServerGroup}
Cooldown: '60'
ScalingAdjustment: '-1'
MEMAlarmHigh:
Type: AWS::CloudWatch::Alarm
Properties:
AlarmDescription: Scale-up if MEM > 50% for 1 minute
MetricName: MemoryUtilization
Namespace: system/linux
Statistic: Average
Period: '60'
EvaluationPeriods: '1'
Threshold: '50'
AlarmActions:
- {Ref: WebServerScaleUpPolicy}
Dimensions:
- Name: AutoScalingGroupName
Value: {Ref: WebServerGroup}
ComparisonOperator: GreaterThanThreshold
MEMAlarmLow:
Type: AWS::CloudWatch::Alarm
Properties:
AlarmDescription: Scale-down if MEM < 15% for 1 minute
MetricName: MemoryUtilization
Namespace: system/linux
Statistic: Average
Period: '60'
EvaluationPeriods: '1'
Threshold: '15'
AlarmActions:
- {Ref: WebServerScaleDownPolicy}
Dimensions:
- Name: AutoScalingGroupName
Value: {Ref: WebServerGroup}
ComparisonOperator: LessThanThreshold
ElasticLoadBalancer:
Type: AWS::ElasticLoadBalancing::LoadBalancer
Properties:
AvailabilityZones: {'Fn::GetAZs': ''}
Listeners:
- {LoadBalancerPort: '80', InstancePort: '80',
Protocol: HTTP}
HealthCheck: {Target: 'HTTP:80/', HealthyThreshold: '3',
UnhealthyThreshold: '5', Interval: '30', Timeout: '5'}
LaunchConfig:
Type: AWS::AutoScaling::LaunchConfiguration
Metadata:
AWS::CloudFormation::Init:
config:
files:
/etc/cfn/cfn-credentials:
content:
Fn::Join:
- ''
- - AWSAccessKeyId=
- {Ref: WebServerKeys}
- '
'
- AWSSecretKey=
- Fn::GetAtt: [WebServerKeys, SecretAccessKey]
- '
'
mode: '000400'
owner: root
group: root
/tmp/setup.mysql:
content:
Fn::Join:
- ''
- - 'CREATE DATABASE '
- {Ref: DBName}
- ';
'
- 'GRANT ALL PRIVILEGES ON '
- {Ref: DBName}
- .* TO '
- {Ref: DBUsername}
- '''@''localhost''
'
- IDENTIFIED BY '
- {Ref: DBPassword}
- ''';
'
- 'FLUSH PRIVILEGES;
'
- 'EXIT
'
mode: '000644'
owner: root
group: root
/tmp/stats-crontab.txt:
content:
Fn::Join:
- ''
- - 'MAIL=""
'
- '
'
- '* * * * * /opt/aws/bin/cfn-push-stats --watch '
- {Ref: MEMAlarmHigh}
- ' --mem-util
'
- '* * * * * /opt/aws/bin/cfn-push-stats --watch '
- {Ref: MEMAlarmLow}
- ' --mem-util
'
mode: '000600'
owner: root
group: root
packages:
yum:
python-psutil: []
cronie: []
mysql: []
mysql-server: []
httpd: []
wordpress: []
services:
systemd:
mysqld: {enabled: 'true', ensureRunning: 'true'}
httpd: {enabled: 'true', ensureRunning: 'true'}
crond: {enabled: 'true', ensureRunning: 'true'}
Properties:
ImageId:
Fn::FindInMap:
- DistroArch2AMI
- {Ref: LinuxDistribution}
- Fn::FindInMap:
- AWSInstanceType2Arch
- {Ref: InstanceType}
- Arch
InstanceType: {Ref: InstanceType}
KeyName: {Ref: KeyName}
UserData:
Fn::Base64:
Fn::Join:
- ''
- - '#!/bin/bash -v
'
- '/opt/aws/bin/cfn-init -s '
- {Ref: 'AWS::StackName'}
- ' -r LaunchConfig '
- ' --region '
- {Ref: 'AWS::Region'}
- '
'
- '# Setup MySQL root password and create a user
'
- mysqladmin -u root password '
- {Ref: DBRootPassword}
- '''
'
- mysql -u root --password='
- {Ref: DBRootPassword}
- ''' < /tmp/setup.mysql
'
- 'sed -i "/Deny from All/d" /etc/httpd/conf.d/wordpress.conf
'
- sed --in-place --e s/database_name_here/
- {Ref: DBName}
- / --e s/username_here/
- {Ref: DBUsername}
- / --e s/password_here/
- {Ref: DBPassword}
- '/ /usr/share/wordpress/wp-config.php
'
- 'systemctl restart httpd.service
'
- '# install crontab
'
- 'crontab /tmp/stats-crontab.txt
'
Outputs:
URL:
Description: The URL of the website
Value:
Fn::Join:
- ''
- - http://
- Fn::GetAtt: [ElasticLoadBalancer, DNSName]
- /wordpress
|
