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final.yaml
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final.yaml
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AWSTemplateFormatVersion: 2010-09-09
Description: |
This YAML is resolving AWS Auto Remediation Project
Parameters:
KeyName:
Type: AWS::EC2::KeyPair::KeyName
Default: KeyPair
IAMRole:
Type: String
Default: arn:aws:iam::621627302500:role/LambdaAutoScaling
Resources:
# ------------------------------------------
# ----------- VPC CONFIGURATIONS -----------
# ------------------------------------------
# Create a VPC
ProjVPC:
Type: AWS::EC2::VPC
Properties:
CidrBlock: 10.0.0.0/16
EnableDnsHostnames: true
EnableDnsSupport: true
Tags:
- Key: 'Name'
Value: 'Proj-VPC'
# Create an Internet Gateway
ProjIGW:
Type: AWS::EC2::InternetGateway
Properties:
Tags:
- Key: 'Name'
Value: 'Proj-InternetGW'
# Attach Internet Gateway to VPC
AttachGateway:
Type: 'AWS::EC2::VPCGatewayAttachment'
Properties:
VpcId: !Ref ProjVPC
InternetGatewayId: !Ref ProjIGW
# Create a Public Subnet under us-east-1a
Public1a:
Type: AWS::EC2::Subnet
Properties:
AvailabilityZone: us-east-1a
CidrBlock: 10.0.1.0/24
VpcId: !Ref ProjVPC
MapPublicIpOnLaunch: true
Tags:
- Key: 'Name'
Value: 'Public1a'
# Create a Public Subnet under us-east-1b
Public1b:
Type: AWS::EC2::Subnet
Properties:
AvailabilityZone: us-east-1b
CidrBlock: 10.0.2.0/24
VpcId: !Ref ProjVPC
MapPublicIpOnLaunch: true
Tags:
- Key: 'Name'
Value: 'Public1b'
# Create a Public Route table
PublicRT:
Type: AWS::EC2::RouteTable
Properties:
VpcId: !Ref ProjVPC
Tags:
- Key: 'Name'
Value: 'PublicRT'
# New Route for Public subnets to access Internet Gateway
IGWRoute:
Type: 'AWS::EC2::Route'
DependsOn: AttachGateway
Properties:
RouteTableId: !Ref PublicRT
DestinationCidrBlock: '0.0.0.0/0'
GatewayId: !Ref ProjIGW
# Associate Public Subnet under Public Route Table
PublicRTASS1:
Type: AWS::EC2::SubnetRouteTableAssociation
Properties:
RouteTableId: !Ref PublicRT
SubnetId: !Ref Public1a
# ------------------------------------------
# ------ SECURITY GROUP CONFIGURATIONS -----
# ------------------------------------------
# Create Security Group for Auto Scaling Group
EC2SecGrp:
Type: AWS::EC2::SecurityGroup
Properties:
GroupDescription: 22 - 80 - 443 Ports
GroupName: EC2SecGrp
SecurityGroupIngress:
- 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
VpcId: !Ref ProjVPC
Tags:
- Key: 'Name'
Value: 'EC2SecGrp'
# ------------------------------------------
# ----- LAUNCH TEMPLATE CONFIGURATIONS -----
# ------------------------------------------
# Create LaunchTemplate for PROD. AutoScaling
LTPROD:
Type: AWS::EC2::LaunchTemplate
Properties:
LaunchTemplateData:
ImageId: ami-0cff7528ff583bf9a
InstanceType: t2.micro
KeyName: !Ref KeyName
SecurityGroupIds:
- !Ref EC2SecGrp
TagSpecifications:
- ResourceType: instance
Tags:
- Key: Name
Value: 'PROD'
LaunchTemplateName: LTPROD
VersionDescription: 'v1'
# Create LaunchTemplate for DEV. AutoScaling
LTDEV:
Type: AWS::EC2::LaunchTemplate
Properties:
LaunchTemplateData:
ImageId: ami-0cff7528ff583bf9a
InstanceType: t2.micro
KeyName: !Ref KeyName
SecurityGroupIds:
- !Ref EC2SecGrp
TagSpecifications:
- ResourceType: instance
Tags:
- Key: Name
Value: 'DEV'
LaunchTemplateName: LTDEV
VersionDescription: 'v1'
# ------------------------------------------
# ------- AUTO SCALING CONFIGURATIONS ------
# ------------------------------------------
# Create AutoScaling Group
AutoScalingPROD:
Type: AWS::AutoScaling::AutoScalingGroup
Properties:
DesiredCapacity: "2"
HealthCheckGracePeriod: 90
HealthCheckType: EC2
LaunchTemplate:
LaunchTemplateId: !Ref LTPROD
Version: !GetAtt LTPROD.LatestVersionNumber
MaxSize: "3"
MinSize: "2"
VPCZoneIdentifier: [!Ref Public1a]
MetricsCollection:
- Granularity: "1Minute"
Tags:
- Key: 'Name'
Value: 'AutoScalingPROD'
PropagateAtLaunch: true
# Create AutoScaling Group
AutoScalingDEV:
Type: AWS::AutoScaling::AutoScalingGroup
Properties:
DesiredCapacity: "2"
HealthCheckGracePeriod: 90
HealthCheckType: EC2
LaunchTemplate:
LaunchTemplateId: !Ref LTDEV
Version: !GetAtt LTDEV.LatestVersionNumber
MaxSize: "3"
MinSize: "2"
VPCZoneIdentifier: [!Ref Public1a]
MetricsCollection:
- Granularity: "1Minute"
Tags:
- Key: 'Name'
Value: 'AutoScalingDEV'
PropagateAtLaunch: true
# ------------------------------------------
# -------- SNS&ALARM CONFIGURATIONS --------
# ------------------------------------------
# Create SNS Topic for Email Notification
SNSTopic:
Type: AWS::SNS::Topic
Properties:
DisplayName: AutoScalingSNS
FifoTopic: false
Subscription:
- Protocol: email
Endpoint: [email protected]
Tags:
- Key: Name
Value: AutoScalingSNS
# Create Alarm for PROD AutoScaling DesiredCapacity
DesiredCapacityforPROD:
Type: AWS::CloudWatch::Alarm
Properties:
AlarmDescription: "DesiredCapacity Change Alarm for PROD"
Namespace: AWS/AutoScaling
MetricName: GroupDesiredCapacity
Dimensions:
- Name: AutoScalingGroupName
Value: !Ref AutoScalingPROD
Period: 60
EvaluationPeriods: 1
Threshold: 1
ComparisonOperator: LessThanOrEqualToThreshold
Statistic: Maximum
AlarmActions:
- !Ref SNSTopic
AlarmName: "DesiredCapacityforPROD"
# Create Alarm for DEV AutoScaling DesiredCapacity
DesiredCapacityforDEV:
Type: AWS::CloudWatch::Alarm
Properties:
AlarmDescription: "DesiredCapacity Change Alarm for DEV"
Namespace: AWS/AutoScaling
MetricName: GroupDesiredCapacity
Dimensions:
- Name: AutoScalingGroupName
Value: !Ref AutoScalingDEV
Period: 60
EvaluationPeriods: 1
Threshold: 1
ComparisonOperator: LessThanOrEqualToThreshold
Statistic: Maximum
AlarmActions:
- !Ref SNSTopic
AlarmName: "DesiredCapacityforDEV"
# ------------------------------------------
# --------- LAMBDA CONFIGURATIONS ----------
# ------------------------------------------
# Create Lambda Function
LabmdaAutoScaling:
Type: AWS::Lambda::Function
Properties:
Handler: index.lambda_handler
Role: !Ref IAMRole
Code:
ZipFile: |
import boto3
def update_auto_scaling_group_desired_capacity(auto_scaling_group_name, desired_capacity):
autoscaling_client = boto3.client('autoscaling')
response = autoscaling_client.update_auto_scaling_group(
AutoScalingGroupName=auto_scaling_group_name,
DesiredCapacity=desired_capacity
)
print("Desired capacity updated successfully for Auto Scaling group:", auto_scaling_group_name)
def lambda_handler(event, context):
autoscaling_client = boto3.client('autoscaling')
try:
# Retrieve information about all Auto Scaling groups
response = autoscaling_client.describe_auto_scaling_groups()
auto_scaling_group_names = [group['AutoScalingGroupName'] for group in response['AutoScalingGroups']]
# Update desired capacity for each Auto Scaling group
for auto_scaling_group_name in auto_scaling_group_names:
update_auto_scaling_group_desired_capacity(auto_scaling_group_name, 2)
return {
'statusCode': 200,
'body': 'Desired capacity updated successfully for all Auto Scaling groups'
}
except Exception as e:
return {
'statusCode': 500,
'body': f'Error: {str(e)}'
}
Runtime: python3.12
# Add SNS as a TRIGGER to LAmbda Function
SNSTopicPermission:
Type: AWS::Lambda::Permission
Properties:
Action: lambda:InvokeFunction
FunctionName: !GetAtt LabmdaAutoScaling.Arn
Principal: sns.amazonaws.com
SourceArn: !Ref SNSTopic
# Lambda Function Subscription to the SNS
LambdaSNSSubscription:
Type: AWS::SNS::Subscription
Properties:
Protocol: 'lambda'
Endpoint: !GetAtt LabmdaAutoScaling.Arn
TopicArn: !Ref SNSTopic