I am trying to create the nested stack but having trouble as I am new to this and still in learning process. I have created the vpc with 2 private and 2 public subnets. Then attached the internet-facing elb to 2 public subnets. I think I am not referencing it right. Vpc is created but while creating elb there is an error Output 'VpcID' not found in stack
I think there might be a problem in the syntax as I am changing my previous file to nested stack. I might not be referencing right in the Internet facing elb stack.
Root stack:
---
AWSTemplateFormatVersion: 2010-09-09
Parameters:
bucketname:
Type: String
Description: Path to the bucket
Default: wahaj-webserver
bucketpath:
Type: String
Description: Path to the bucket
Default: /nested-stack
Resources:
Vpcstack:
Type: AWS::CloudFormation::Stack
Properties:
TemplateURL: !Sub "https://${bucketname}.s3.us-east-2.amazonaws.com${bucketpath}/vpc1.yml"
elb:
DependsOn: Vpcstack
Type: AWS::CloudFormation::Stack
Properties:
TemplateURL: !Sub "https://${bucketname}.s3.us-east-2.amazonaws.com${bucketpath}/internetfacing-elb.yml"
Parameters:
SubnetA: !GetAtt Vpcstack.Outputs.SubnetA
SubnetB: !GetAtt Vpcstack.Outputs.SubnetB
VpcID: !GetAtt Vpcstack.Outputs.VpcID
Vpc stack:
---
AWSTemplateFormatVersion: 2010-09-09
Resources:
VPC:
Type: AWS::EC2::VPC
Properties:
CidrBlock: 11.0.0.0/16
EnableDnsSupport: true
EnableDnsHostnames: true
InstanceTenancy: default
InternetGateway:
Type: AWS::EC2::InternetGateway
VPCGatewayAttachment:
Type: AWS::EC2::VPCGatewayAttachment
Properties:
VpcId: !Ref VPC
InternetGatewayId: !Ref InternetGateway
SubnetA:
Type: AWS::EC2::Subnet
Properties:
AvailabilityZone: us-east-2a
VpcId: !Ref VPC
CidrBlock: 11.0.0.0/24
MapPublicIpOnLaunch: true
SubnetB:
Type: AWS::EC2::Subnet
Properties:
AvailabilityZone: us-east-2b
VpcId: !Ref VPC
CidrBlock: 11.0.1.0/24
MapPublicIpOnLaunch: true
SubnetC:
Type: AWS::EC2::Subnet
Properties:
AvailabilityZone: us-east-2a
VpcId: !Ref VPC
CidrBlock: 11.0.2.0/24
MapPublicIpOnLaunch: false
SubnetD:
Type: AWS::EC2::Subnet
Properties:
AvailabilityZone: us-east-2b
VpcId: !Ref VPC
CidrBlock: 11.0.3.0/24
MapPublicIpOnLaunch: false
RouteTable:
Type: AWS::EC2::RouteTable
Properties:
VpcId: !Ref VPC
RouteTable2:
Type: AWS::EC2::RouteTable
Properties:
VpcId: !Ref VPC
InternetRoute:
Type: AWS::EC2::Route
DependsOn: VPCGatewayAttachment
Properties:
DestinationCidrBlock: 0.0.0.0/0
GatewayId: !Ref InternetGateway
RouteTableId: !Ref RouteTable
SubnetARouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
Properties:
RouteTableId: !Ref RouteTable
SubnetId: !Ref SubnetA
SubnetBRouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
Properties:
RouteTableId: !Ref RouteTable
SubnetId: !Ref SubnetB
SubnetCRouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
Properties:
RouteTableId: !Ref RouteTable2
SubnetId: !Ref SubnetC
SubnetDRouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
Properties:
RouteTableId: !Ref RouteTable2
SubnetId: !Ref SubnetD
SecurityGroup:
Type: AWS::EC2::SecurityGroup
Properties:
GroupName: "Internet Group"
GroupDescription: "SSH traffic in, all traffic out."
VpcId: !Ref VPC
SecurityGroupIngress:
- IpProtocol: tcp
FromPort: "22"
ToPort: "22"
CidrIp: 0.0.0.0/0
SecurityGroupEgress:
- IpProtocol: -1
CidrIp: 0.0.0.0/0
NAT:
Type: AWS::EC2::NatGateway
Properties:
AllocationId:
Fn::GetAtt:
- EIP
- AllocationId
SubnetId:
Ref: SubnetA
Tags:
- Key: Name
Value: wahaj-nat
EIP:
DependsOn: VPCGatewayAttachment
Type: AWS::EC2::EIP
Properties:
Domain: VPC
Route:
Type: AWS::EC2::Route
Properties:
RouteTableId:
Ref: RouteTable2
DestinationCidrBlock: 0.0.0.0/0
NatGatewayId:
Ref: NAT
Outputs:
VpcID:
Description: VPC id
Value: !Ref VPC
Export:
Name: "VpcID"
SubnetA:
Description: public subnet
Value: !Ref SubnetA
Export:
Name: "SubnetA"
SubnetB:
Description: public subnet 2
Value: !Ref SubnetB
Export:
Name: "SubnetB"
SubnetC:
Description: priavte subnet
Value: !Ref SubnetC
Export:
Name: "SubnetC"
SubnetD:
Description: private subnet 2
Value: !Ref SubnetD
Export:
Name: "SubnetD"
Internet facing elb:
---
AWSTemplateFormatVersion: 2010-09-09
Resources:
wahajelb:
Type: AWS::EC2::SecurityGroup
Properties:
GroupName: wahaj-elb
VpcId:
Fn::ImportValue: "VpcID"
SecurityGroupIngress:
- IpProtocol: tcp
FromPort: 22
ToPort: 22
CidrIp: 0.0.0.0/0
Description: For traffic from Internet
- IpProtocol: tcp
FromPort: 80
ToPort: 80
CidrIp: 0.0.0.0/0
Description: For traffic from Internet
GroupDescription: Security Group for demo server
MyLoadBalancer:
Type: AWS::ElasticLoadBalancing::LoadBalancer
Properties:
Listeners:
- LoadBalancerPort: "80"
InstancePort: "80"
Protocol: HTTP
SecurityGroups:
- !Ref wahajelb
LoadBalancerName: wahajelb
Subnets:
- Fn::ImportValue: "SubnetA"
- Fn::ImportValue: "SubnetB"
HealthCheck:
Target: HTTP:80/SamplePage.php
HealthyThreshold: "3"
UnhealthyThreshold: "5"
Interval: "30"
Timeout: "5"
Outputs:
ec2:
Description: ec2
Value: !Ref MyLoadBalancer
Export:
Name: "MyLoadBalancer"
lgsg:
Description: lg-sg
Value: !GetAtt wahajelb.GroupId
Export:
Name: "lgsg"
Your Vpc stack has an out out of vpcID
not VpcID
.
This must be an exact string match for it to be successfully referenced in your Root stack
Update your Vpc stack to the below
---
AWSTemplateFormatVersion: 2010-09-09
Resources:
VPC:
Type: AWS::EC2::VPC
Properties:
CidrBlock: 11.0.0.0/16
EnableDnsSupport: true
EnableDnsHostnames: true
InstanceTenancy: default
InternetGateway:
Type: AWS::EC2::InternetGateway
VPCGatewayAttachment:
Type: AWS::EC2::VPCGatewayAttachment
Properties:
VpcId: !Ref VPC
InternetGatewayId: !Ref InternetGateway
SubnetA:
Type: AWS::EC2::Subnet
Properties:
AvailabilityZone: us-east-2a
VpcId: !Ref VPC
CidrBlock: 11.0.0.0/24
MapPublicIpOnLaunch: true
SubnetB:
Type: AWS::EC2::Subnet
Properties:
AvailabilityZone: us-east-2b
VpcId: !Ref VPC
CidrBlock: 11.0.1.0/24
MapPublicIpOnLaunch: true
SubnetC:
Type: AWS::EC2::Subnet
Properties:
AvailabilityZone: us-east-2a
VpcId: !Ref VPC
CidrBlock: 11.0.2.0/24
MapPublicIpOnLaunch: false
SubnetD:
Type: AWS::EC2::Subnet
Properties:
AvailabilityZone: us-east-2b
VpcId: !Ref VPC
CidrBlock: 11.0.3.0/24
MapPublicIpOnLaunch: false
RouteTable:
Type: AWS::EC2::RouteTable
Properties:
VpcId: !Ref VPC
RouteTable2:
Type: AWS::EC2::RouteTable
Properties:
VpcId: !Ref VPC
InternetRoute:
Type: AWS::EC2::Route
DependsOn: VPCGatewayAttachment
Properties:
DestinationCidrBlock: 0.0.0.0/0
GatewayId: !Ref InternetGateway
RouteTableId: !Ref RouteTable
SubnetARouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
Properties:
RouteTableId: !Ref RouteTable
SubnetId: !Ref SubnetA
SubnetBRouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
Properties:
RouteTableId: !Ref RouteTable
SubnetId: !Ref SubnetB
SubnetCRouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
Properties:
RouteTableId: !Ref RouteTable2
SubnetId: !Ref SubnetC
SubnetDRouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
Properties:
RouteTableId: !Ref RouteTable2
SubnetId: !Ref SubnetD
SecurityGroup:
Type: AWS::EC2::SecurityGroup
Properties:
GroupName: "Internet Group"
GroupDescription: "SSH traffic in, all traffic out."
VpcId: !Ref VPC
SecurityGroupIngress:
- IpProtocol: tcp
FromPort: "22"
ToPort: "22"
CidrIp: 0.0.0.0/0
SecurityGroupEgress:
- IpProtocol: -1
CidrIp: 0.0.0.0/0
NAT:
Type: AWS::EC2::NatGateway
Properties:
AllocationId:
Fn::GetAtt:
- EIP
- AllocationId
SubnetId:
Ref: SubnetA
Tags:
- Key: Name
Value: wahaj-nat
EIP:
DependsOn: VPCGatewayAttachment
Type: AWS::EC2::EIP
Properties:
Domain: VPC
Route:
Type: AWS::EC2::Route
Properties:
RouteTableId:
Ref: RouteTable2
DestinationCidrBlock: 0.0.0.0/0
NatGatewayId:
Ref: NAT
Outputs:
VpcID:
Description: VPC id
Value: !Ref VPC
Export:
Name:
Fn::Sub: "${AWS::StackName}-VpcID"
SubnetA:
Description: public subnet
Value: !Ref SubnetA
Export:
Name:
Fn::Sub: "${AWS::StackName}-SubnetA"
SubnetB:
Description: public subnet 2
Value: !Ref SubnetB
Export:
Name:
Fn::Sub: "${AWS::StackName}-SubnetB"
SubnetC:
Description: priavte subnet
Value: !Ref SubnetC
Export:
Name:
Fn::Sub: "${AWS::StackName}-SubnetC"
SubnetD:
Description: private subnet 2
Value: !Ref SubnetD
Export:
Name:
Fn::Sub: "${AWS::StackName}-SubnetD"