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samples-simple-http-server.yml
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AWSTemplateFormatVersion: '2010-09-09'
Description: ASG of Apache HTTP Server with ALB and CloudWatch Agent
Metadata:
cfn-lint:
config:
ignore_checks:
- W2509
AWS::CloudFormation::Interface:
ParameterGroups:
- Label:
default: System Classification
Parameters:
- pOrg
- pSystem
- pApp
- Label:
default: System Environment
Parameters:
- pEnvPurpose
- Label:
default: Network
Parameters:
- pVpcId
- pAlbSubnetId1
- pAlbSubnetId2
- pWebSubnetId1
- pWebSubnetId2
- Label:
default: Load Balancer
Parameters:
- pAlbScheme
- pAlbIngressCidr
- pAlbIngressPrefixListId
- Label:
default: Auto Scaling
Parameters:
- pServerCount
- pAmiId
- pInstanceType
- Label:
default: Permissions Boundary
Parameters:
- pPermissionsBoundaryArn
ParameterLabels:
pEnvPurpose:
default: Environment Purpose
pOrg:
default: Organization Identifier
pSystem:
default: System Identifier
pApp:
default: Application Identifier
pVpcId:
default: VPC ID
pAlbSubnetId1:
default: ALB Subnet ID 1
pAlbSubnetId2:
default: ALB Subnet ID 2
pWebSubnetId1:
default: Web Server Subnet ID 1
pWebSubnetId2:
default: Web Server Subnet ID 2
pAlbScheme:
default: Application Load Balancer (ALB) Scheme
pAlbIngressCidr:
default: Application Load Balancer (ALB) Allowed Ingress CIDR IP Range
pAlbIngressPrefixListId:
default: Application Load Balancer (ALB) Allowed Prefix List ID
pServerCount:
default: Number of EC2 Instances
pInstanceType:
default: EC2 Instance Type
pAmiId:
default: EC2 AMI ID
pPermissionsBoundaryArn:
default: IAM Permissions Boundary ARN (optional)
Parameters:
pOrg:
Type: String
Description: Used to qualify resource names
Default: example
pSystem:
Type: String
Description: Used to qualify resource names
Default: samples
pApp:
Type: String
Description: Used to qualify resource names
Default: http
pEnvPurpose:
Type: String
Description: Used to qualify resource names. 10 characters max.
AllowedPattern: '^[a-zA-Z0-9-_]{1,10}$'
pVpcId:
Description: ID of existing VPC
Type: AWS::EC2::VPC::Id
pAlbSubnetId1:
Description: ID of 1 of 2 subnets in which ALB is to be deployed
Type: AWS::EC2::Subnet::Id
pAlbSubnetId2:
Description: ID of 2 of 2 subnets in which ALB is to be deployed
Type: AWS::EC2::Subnet::Id
pWebSubnetId1:
Description: ID or 1 or 2 subnets in which web server is to be deployed
Type: AWS::EC2::Subnet::Id
pWebSubnetId2:
Description: ID or 3 or 2 subnets in which web server is to be deployed
Type: AWS::EC2::Subnet::Id
pAlbScheme:
Description: ALB Scheme
Type: String
Default: internet-facing
AllowedValues:
- internal
- internet-facing
pAlbIngressCidr:
Description: IP address range that can be used to access the ALB
Type: String
Default: ''
pAlbIngressPrefixListId:
Description: ID of the prefix list representing the service that can be used to access the ALB
Type: String
Default: ''
pServerCount:
Description: Number of Amazon EC2 instances to launch for the web server
Type: Number
Default: 1
pAmiId:
Type: 'AWS::SSM::Parameter::Value<AWS::EC2::Image::Id>'
Default: '/aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-x86_64-ebs'
pInstanceType:
Description: WebServer EC2 instance type
Type: String
Default: t3a.micro
AllowedValues:
- t3a.micro
- t3a.small
- t3a.medium
ConstraintDescription: must be a valid EC2 instance type.
pPermissionsBoundaryArn:
Description: IAM Permissions Boundary ARN (optional)
Type: String
Default: ''
Rules:
SubnetsInVPC:
Assertions:
- Assert:
'Fn::EachMemberIn':
- 'Fn::ValueOfAll':
- 'AWS::EC2::Subnet::Id'
- VpcId
- 'Fn::RefAll': 'AWS::EC2::VPC::Id'
AssertDescription: All subnets must in the VPC
Conditions:
cAlbIngressUseCidr: !Not [!Equals [ !Ref 'pAlbIngressCidr', '' ] ]
cAlbIngressUsePrefixListId: !Not [!Equals [ !Ref 'pAlbIngressPrefixListId', '' ] ]
cUsePermissionsBoundary: !Not [!Equals [ !Ref 'pPermissionsBoundaryArn', '' ] ]
Resources:
rAlb:
Type: AWS::ElasticLoadBalancingV2::LoadBalancer
Properties:
Name: !Sub '${pSystem}-${pApp}-${pEnvPurpose}'
Scheme: !Ref pAlbScheme
SecurityGroups:
- !Ref rAlbSecurityGroup
Subnets:
- !Ref pAlbSubnetId1
- !Ref pAlbSubnetId2
rAlbSecurityGroup:
Type: AWS::EC2::SecurityGroup
Properties:
GroupName: !Sub '${pSystem}-${pApp}-alb-${pEnvPurpose}'
GroupDescription: HTTP Access from any location
VpcId: !Ref pVpcId
SecurityGroupIngress:
- IpProtocol: tcp
FromPort: 80
ToPort: 80
CidrIp: !If [ cAlbIngressUseCidr, !Ref pAlbIngressCidr, '0.0.0.0/0' ]
SourcePrefixListId: !If [ cAlbIngressUsePrefixListId, !Ref pAlbIngressPrefixListId, !Ref 'AWS::NoValue' ]
SecurityGroupEgress:
- IpProtocol: tcp
FromPort: 80
ToPort: 80
CidrIp: 0.0.0.0/0
rHttpListener:
Type: AWS::ElasticLoadBalancingV2::Listener
Properties:
LoadBalancerArn: !Ref rAlb
Port: 80
Protocol: HTTP
DefaultActions:
- Type: forward
TargetGroupArn: !Ref rTargetGroup
rTargetGroup:
Type: AWS::ElasticLoadBalancingV2::TargetGroup
Properties:
Name: !Sub '${pSystem}-${pApp}-${pEnvPurpose}'
VpcId: !Ref pVpcId
HealthCheckIntervalSeconds: 15
HealthCheckTimeoutSeconds: 10
HealthCheckPath: /
HealthCheckProtocol: HTTP
Port: 80
Protocol: HTTP
Matcher:
HttpCode: 200-299
rAsg:
Type: AWS::AutoScaling::AutoScalingGroup
Properties:
AutoScalingGroupName: !Sub '${pSystem}-${pApp}-${pEnvPurpose}'
MinSize: '1'
MaxSize: '4'
DesiredCapacity: !Ref pServerCount
VPCZoneIdentifier:
- !Ref pWebSubnetId1
- !Ref pWebSubnetId2
TargetGroupARNs:
- !Ref rTargetGroup
LaunchConfigurationName: !Ref rLaunchConfig
Tags:
- Key: Name
Value: !Sub '${pSystem}-${pApp}-${pEnvPurpose}'
PropagateAtLaunch: true
CreationPolicy:
ResourceSignal:
Count: !Ref pServerCount
Timeout: PT10M
rInstanceSecurityGroup:
Type: AWS::EC2::SecurityGroup
Properties:
GroupName: !Sub '${pSystem}-${pApp}-ec2-${pEnvPurpose}'
VpcId: !Ref pVpcId
GroupDescription: Allow access via HTTP
SecurityGroupIngress:
- IpProtocol: tcp
FromPort: 80
ToPort: 80
SourceSecurityGroupId: !Ref rAlbSecurityGroup
rLaunchConfig:
Type: AWS::AutoScaling::LaunchConfiguration
Properties:
LaunchConfigurationName: !Sub '${pSystem}-${pApp}-${pEnvPurpose}'
InstanceType: !Ref pInstanceType
ImageId: !Ref pAmiId
IamInstanceProfile: !Ref rInstanceProfile
SecurityGroups:
- !Ref rInstanceSecurityGroup
AssociatePublicIpAddress: false
UserData:
Fn::Base64: !Sub |
#!/bin/bash -xe
yum install -y amazon-cloudwatch-agent
/opt/aws/bin/cfn-init \
--verbose \
--stack ${AWS::StackName} \
--resource rLaunchConfig \
--configsets all \
--region ${AWS::Region}
/opt/aws/bin/cfn-signal \
--exit-code $? \
--stack ${AWS::StackName} \
--resource rAsg \
--region ${AWS::Region}
Metadata:
AWS::CloudFormation::Init:
configSets:
all:
- 00-config-cfn-hup
- 01-config-cloudwatch-agent
- 02-restart-cloudwatch-agent
- 03-config-workload
update-environment:
- 01-config-cloudwatch-agent
- 02-restart-cloudwatch-agent
00-config-cfn-hup:
files:
/etc/cfn/cfn-hup.conf:
content: !Sub |
[main]
stack=${AWS::StackId}
region=${AWS::Region}
interval=1
mode: '000400'
owner: root
group: root
/etc/cfn/hooks.d/amazon-cloudwatch-agent-auto-reloader.conf:
content: !Sub |
[cfn-auto-reloader-hook]
triggers=post.update
path=Resources.EC2Instance.Metadata.AWS::CloudFormation::Init.02_config-amazon-cloudwatch-agent
action=/opt/aws/bin/cfn-init -v --stack ${AWS::StackId} --resource EC2Instance --region ${AWS::Region} --configsets update-environment
runas=root
mode: '000400'
owner: root
group: root
/lib/systemd/system/cfn-hup.service:
content: |
[Unit]
Description=cfn-hup daemon
[Service]
Type=simple
ExecStart=/opt/aws/bin/cfn-hup
Restart=always
[Install]
WantedBy=multi-user.target
commands:
01-enable-cfn-hup:
command: systemctl enable cfn-hup.service
02-start-cfn-hup:
command: systemctl start cfn-hup.service
01-config-cloudwatch-agent:
files:
/opt/aws/amazon-cloudwatch-agent/etc/amazon-cloudwatch-agent.json:
content: !Sub |
{
"metrics": {
"metrics_collected": {
"cpu": {
"resources": [
"*"
],
"measurement": [
"usage_idle",
"usage_nice",
"usage_guest"
],
"totalcpu": false,
"metrics_collection_interval": 10
},
"mem": {
"measurement": [
"total",
"used",
"used_percent"
]
},
"swap": {
"measurement": [
"free",
"used",
"used_percent"
]
},
"netstat": {
"measurement": [
"tcp_established",
"tcp_syn_sent",
"tcp_close"
],
"metrics_collection_interval": 60
},
"disk": {
"measurement": [
"total",
"free",
"used",
"used_percent"
],
"resources": [
"*"
],
"drop_device": true
},
"processes": {
"measurement": [
"running",
"sleeping",
"dead"
]
}
},
"append_dimensions": {
"ImageId": "${!aws:ImageId}",
"InstanceId": "${!aws:InstanceId}",
"InstanceType": "${!aws:InstanceType}",
"AutoScalingGroupName": "${!aws:AutoScalingGroupName}"
},
"aggregation_dimensions" : [["AutoScalingGroupName"], ["InstanceId", "InstanceType"],[]]
},
"logs": {
"logs_collected": {
"files": {
"collect_list": [
{
"file_path": "/opt/aws/amazon-cloudwatch-agent/logs/amazon-cloudwatch-agent.log",
"log_group_name": "amazon-cloudwatch-agent.log",
"log_stream_name": "amazon-cloudwatch-agent.log",
"timezone": "UTC"
},
{
"file_path": "/var/log/cloud-init.log",
"log_group_name": "${rCloudWatchLogsAgentGroup}",
"log_stream_name": "{instance_id}/cloud-init.log",
"timezone": "UTC"
},
{
"file_path": "/var/log/cloud-init-output.log",
"log_group_name": "${rCloudWatchLogsAgentGroup}",
"log_stream_name": "{instance_id}/cloud-init-output.log",
"timezone": "UTC"
},
{
"file_path": "/var/log/cfn-init.log",
"log_group_name": "${rCloudWatchLogsAgentGroup}",
"log_stream_name": "{instance_id}/cfn-init.log",
"timezone": "UTC"
},
{
"file_path": "/var/log/cfn-wire.log",
"log_group_name": "${rCloudWatchLogsAgentGroup}",
"log_stream_name": "{instance_id}/cfn-wire.log",
"timezone": "UTC"
},
{
"file_path": "/var/log/httpd/access_log",
"log_group_name": "${rCloudWatchLogsAgentGroup}",
"log_stream_name": "{instance_id}/apache_access_log",
"timezone": "UTC"
},
{
"file_path": "/var/log/httpd/error_log",
"log_group_name": "${rCloudWatchLogsAgentGroup}",
"log_stream_name": "{instance_id}/apache_error_log",
"timezone": "UTC"
}
]
}
},
"log_stream_name": "${rCloudWatchLogsAgentGroup}",
"force_flush_interval" : 15
}
}
mode: '000444'
owner: root
group: root
02-restart-cloudwatch-agent:
commands:
01-stop-service:
command: /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -a stop
02-start-service:
command: /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -a fetch-config -m ec2 -c file:/opt/aws/amazon-cloudwatch-agent/etc/amazon-cloudwatch-agent.json -s
03-config-workload:
packages:
yum:
httpd: []
files:
/var/www/html/index.html:
content: |
<h1>Congratulations, you have successfully launched the AWS CloudFormation sample.</h1>
mode: '000644'
owner: root
group: root
commands:
01-modify-index-html:
command: 'echo "<p>Served from $(wget -q -O - http://169.254.169.254/latest/meta-data/instance-id)" >> /var/www/html/index.html'
02-enable-httpd:
command: 'systemctl enable httpd.service'
03-start-httpd:
command: 'systemctl start httpd'
rRole:
Type: AWS::IAM::Role
Properties:
RoleName: !Sub '${pOrg}-${pSystem}-${pApp}-${pEnvPurpose}-svc-cloud-watch-ssm'
Path: !Sub '/${pOrg}/${pSystem}/${pApp}/'
AssumeRolePolicyDocument:
Version: 2012-10-17
Statement:
-
Effect: Allow
Principal:
Service: ec2.amazonaws.com
Action: sts:AssumeRole
ManagedPolicyArns:
- arn:aws:iam::aws:policy/AmazonSSMManagedInstanceCore
- arn:aws:iam::aws:policy/CloudWatchAgentServerPolicy
PermissionsBoundary: !If [ cUsePermissionsBoundary, !Ref pPermissionsBoundaryArn, !Ref 'AWS::NoValue' ]
rCloudWatchLogsAgentGroup:
Type: AWS::Logs::LogGroup
Properties:
LogGroupName: !Sub '/${pSystem}/${pApp}/ec2/${pEnvPurpose}'
RetentionInDays: 30
rInstanceProfile:
Type: AWS::IAM::InstanceProfile
Properties:
InstanceProfileName: !Sub '${pSystem}-${pApp}-${pEnvPurpose}'
Path: !Sub '/${pOrg}/${pSystem}/${pApp}/'
Roles:
- !Ref rRole
Outputs:
oUrl:
Value: !GetAtt rAlb.DNSName
Description: Newly created application URL