Error while configuring Application loadbalancer in ECS using cloudformation - amazon-web-services

Question

I am creating ECS cluster, service and task using cloudformation but it gives an error: Embedded stack arn:aws:cloudformation:us-east-2:0212657325299:stack/Root-Cluster-153O1DKDIKGLV/f1123c5c-d1f9-11ea-1216-2a3e4111fce2 was not successfully created: The following resource(s) failed to create: [Myservice, LoadBalancerListener]. I have created a root stack which runs the vpc stack and Cluster stack. This error occurs when running the Cluster stack. I think the error is in the Load balancer and role in Myservice but I am unable to figure the solution. Any help would be appreciated.
---
AWSTemplateFormatVersion: 2010-09-09
Parameters:
SubnetA:
Type: String
SubnetB:
Type: String
VpcID:
Type: String
Resources:
Albsg:
Type: AWS::EC2::SecurityGroup
Properties:
GroupName: alb-sg
VpcId: !Ref 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
Alb:
Type: AWS::ElasticLoadBalancingV2::LoadBalancer
Properties:
IpAddressType: ipv4
Name: Alb
Scheme: internet-facing
SecurityGroups:
- !Ref Albsg
Subnets:
- Ref: "SubnetA"
- Ref: "SubnetB"
Type: application
DefaultTargetGroup:
Type: AWS::ElasticLoadBalancingV2::TargetGroup
Properties:
Name: alb-tg
VpcId: !Ref VpcID
Port: 80
Protocol: HTTP
LoadBalancerListener:
Type: AWS::ElasticLoadBalancingV2::Listener
Properties:
LoadBalancerArn: !Ref Alb
Port: 80
Protocol: HTTP
DefaultActions:
- Type: forward
TargetGroupArn: !Ref DefaultTargetGroup
MyCluster:
Type: AWS::ECS::Cluster
Properties:
ClusterName: Flask-redis
Myservice:
Type: AWS::ECS::Service
Properties:
Cluster: !Ref MyCluster
DeploymentController:
Type: ECS
DesiredCount: 2
LaunchType: EC2
LoadBalancers:
- !Ref Alb
# Role: String
SchedulingStrategy: REPLICA
ServiceName: Python-service
TaskDefinition: !Ref Task
Task:
Type: AWS::ECS::TaskDefinition
Properties:
Family: redis-python
ContainerDefinitions:
- Essential: true
Image: redis:latest
Name: redis
Cpu: .5 vCPU
# ExecutionRoleArn: !Ref Role
Memory: 0.5 GB
NetworkMode: bridge
RequiresCompatibilities:
- EC2---
AWSTemplateFormatVersion: 2010-09-09
Parameters:
SubnetA:
Type: String
SubnetB:
Type: String
VpcID:
Type: String
Resources:
Albsg:
Type: AWS::EC2::SecurityGroup
Properties:
GroupName: alb-sg
VpcId: !Ref 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
Alb:
Type: AWS::ElasticLoadBalancingV2::LoadBalancer
Properties:
IpAddressType: ipv4
Name: Alb
Scheme: internet-facing
SecurityGroups:
- !Ref Albsg
Subnets:
- Ref: "SubnetA"
- Ref: "SubnetB"
Type: application
DefaultTargetGroup:
Type: AWS::ElasticLoadBalancingV2::TargetGroup
Properties:
Name: alb-tg
VpcId: !Ref VpcID
Port: 80
Protocol: HTTP
LoadBalancerListener:
Type: AWS::ElasticLoadBalancingV2::Listener
Properties:
LoadBalancerArn: !Ref Alb
Port: 80
Protocol: HTTP
DefaultActions:
- Type: forward
TargetGroupArn: !Ref DefaultTargetGroup
MyCluster:
Type: AWS::ECS::Cluster
Properties:
ClusterName: Flask-redis
Myservice:
Type: AWS::ECS::Service
Properties:
Cluster: !Ref MyCluster
DeploymentController:
Type: ECS
DesiredCount: 2
LaunchType: EC2
LoadBalancers:
- !Ref Alb
# Role: String
SchedulingStrategy: REPLICA
ServiceName: Python-service
TaskDefinition: !Ref Task
Task:
Type: AWS::ECS::TaskDefinition
Properties:
Family: redis-python
ContainerDefinitions:
- Essential: true
Image: redis:latest
Name: redis
Cpu: .5 vCPU
# ExecutionRoleArn: !Ref Role
Memory: 0.5 GB
NetworkMode: bridge
RequiresCompatibilities:
- EC2

Answer 1

The AWS::ECS::Service LoadBalancer is an object. There were also other issues:
Missing DependsOn
Missing port on container
I used the template in us-east-1 using default VPC. The template will still not work as there are no container instances. But at least your original issue should be addressed.
---
AWSTemplateFormatVersion: 2010-09-09
Parameters:
SubnetA:
Default: subnet-00afd36c5eb1d367b
Type: String
SubnetB:
Default: subnet-0573cd428fe807ebc
Type: String
VpcID:
Default: vpc-040d4c42ee5a159fc
Type: String
Resources:
Albsg:
Type: AWS::EC2::SecurityGroup
Properties:
GroupName: alb-sg
VpcId: !Ref 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
Alb:
Type: AWS::ElasticLoadBalancingV2::LoadBalancer
Properties:
IpAddressType: ipv4
Name: Alb
Scheme: internet-facing
SecurityGroups:
- !Ref Albsg
Subnets:
- Ref: "SubnetA"
- Ref: "SubnetB"
Type: application
DefaultTargetGroup:
Type: AWS::ElasticLoadBalancingV2::TargetGroup
Properties:
Name: alb-tg
VpcId: !Ref VpcID
Port: 5000
Protocol: HTTP
LoadBalancerListener:
Type: AWS::ElasticLoadBalancingV2::Listener
Properties:
LoadBalancerArn: !Ref Alb
Port: 80
Protocol: HTTP
DefaultActions:
- Type: forward
TargetGroupArn: !Ref DefaultTargetGroup
MyCluster:
Type: AWS::ECS::Cluster
Properties:
ClusterName: Flask-redis
Myservice:
Type: AWS::ECS::Service
DependsOn: LoadBalancerListener
Properties:
Cluster: !Ref MyCluster
DeploymentController:
Type: ECS
DesiredCount: 2
LaunchType: EC2
LoadBalancers:
- ContainerName: redis
ContainerPort: 5000
TargetGroupArn: !Ref DefaultTargetGroup
# Role: String
SchedulingStrategy: REPLICA
ServiceName: Python-service
TaskDefinition: !Ref Task
Task:
Type: AWS::ECS::TaskDefinition
Properties:
Family: redis-python
ContainerDefinitions:
- Essential: true
Image: redis:latest
Name: redis
PortMappings:
- ContainerPort: 5000
#HostPort: Integer
#Protocol: tcp
Cpu: .5 vCPU
# ExecutionRoleArn: !Ref Role
Memory: 0.5 GB
NetworkMode: bridge
RequiresCompatibilities:
- EC2