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您可以在环境基础设施即代码 (IaC) 文件中定义和引用参数。有关参数、参数类型、 AWS Proton 参数命名空间以及如何在 IaC 文件中使用参数的详细说明，请参阅AWS Proton 参数。
定义环境参数
您可以为环境 IaC 文件定义输入和输出参数。
读取环境 IaC 文件中的参数值
您可以在环境 IaC 文件中读取与环境相关的参数。您可以引用 AWS Proton 参数命名空间中的参数名称以读取参数值。
-
输入参数 - 引用
environment.inputs.以读取环境输入值。input-name -
资源参数-通过引用名称来读取 AWS Proton 资源参数，
environment.name例如。
注意
无法在环境 IaC 文件中使用其他资源的输出参数。
包含参数的示例环境和服务 IaC 文件
以下示例说明了环境 IaC 文件中的参数定义和引用。然后，该示例说明了如何在服务 IaC 文件中引用环境 IaC 文件中定义的环境输出参数。
例 环境 CloudFormation IaC 文件
在该示例中，请注意以下事项：
-
environment.inputs.命名空间引用环境输入参数。 -
Amazon EC2 Systems Manager (SSM) 参数
StoreInputValue串联环境输入。 -
MyEnvParameterValue输出公开与输出参数相同的输入参数串联。三个额外的输出参数也单独公开输入参数。 -
6 个额外的输出参数公开环境预置的资源。
Resources:
StoreInputValue:
Type: AWS::SSM::Parameter
Properties:
Type: String
Value: "{{ environment.inputs.my_sample_input }} {{ environment.inputs.my_other_sample_input}} {{ environment.inputs.another_optional_input }}"
# input parameter references
# These output values are available to service infrastructure as code files as outputs, when given the
# the 'environment.outputs' namespace, for example, service_instance.environment.outputs.ClusterName.
Outputs:
MyEnvParameterValue: # output definition
Value: !GetAtt StoreInputValue.Value
MySampleInputValue: # output definition
Value: "{{ environment.inputs.my_sample_input }}" # input parameter reference
MyOtherSampleInputValue: # output definition
Value: "{{ environment.inputs.my_other_sample_input }}" # input parameter reference
AnotherOptionalInputValue: # output definition
Value: "{{ environment.inputs.another_optional_input }}" # input parameter reference
ClusterName: # output definition
Description: The name of the ECS cluster
Value: !Ref 'ECSCluster' # provisioned resource
ECSTaskExecutionRole: # output definition
Description: The ARN of the ECS role
Value: !GetAtt 'ECSTaskExecutionRole.Arn' # provisioned resource
VpcId: # output definition
Description: The ID of the VPC that this stack is deployed in
Value: !Ref 'VPC' # provisioned resource
PublicSubnetOne: # output definition
Description: Public subnet one
Value: !Ref 'PublicSubnetOne' # provisioned resource
PublicSubnetTwo: # output definition
Description: Public subnet two
Value: !Ref 'PublicSubnetTwo' # provisioned resource
ContainerSecurityGroup: # output definition
Description: A security group used to allow Fargate containers to receive traffic
Value: !Ref 'ContainerSecurityGroup' # provisioned resource例 服务 CloudFormation IaC 文件
environment.outputs. 命名空间引用环境 IaC 文件的环境输出。例如，名称 environment.outputs.ClusterName 读取 ClusterName 环境输出参数的值。
AWSTemplateFormatVersion: '2010-09-09'
Description: Deploy a service on AWS Fargate, hosted in a public subnet, and accessible via a public load balancer.
Mappings:
TaskSize:
x-small:
cpu: 256
memory: 512
small:
cpu: 512
memory: 1024
medium:
cpu: 1024
memory: 2048
large:
cpu: 2048
memory: 4096
x-large:
cpu: 4096
memory: 8192
Resources:
# A log group for storing the stdout logs from this service's containers
LogGroup:
Type: AWS::Logs::LogGroup
Properties:
LogGroupName: '{{service_instance.name}}' # resource parameter
# The task definition. This is a simple metadata description of what
# container to run, and what resource requirements it has.
TaskDefinition:
Type: AWS::ECS::TaskDefinition
Properties:
Family: '{{service_instance.name}}' # resource parameter
Cpu: !FindInMap [TaskSize, {{service_instance.inputs.task_size}}, cpu] # input parameter
Memory: !FindInMap [TaskSize, {{service_instance.inputs.task_size}}, memory]
NetworkMode: awsvpc
RequiresCompatibilities:
- FARGATE
ExecutionRoleArn: '{{environment.outputs.ECSTaskExecutionRole}}' # output reference to an environment infrastructure code file
TaskRoleArn: !Ref "AWS::NoValue"
ContainerDefinitions:
- Name: '{{service_instance.name}}' # resource parameter
Cpu: !FindInMap [TaskSize, {{service_instance.inputs.task_size}}, cpu]
Memory: !FindInMap [TaskSize, {{service_instance.inputs.task_size}}, memory]
Image: '{{service_instance.inputs.image}}'
PortMappings:
- ContainerPort: '{{service_instance.inputs.port}}' # input parameter
LogConfiguration:
LogDriver: 'awslogs'
Options:
awslogs-group: '{{service_instance.name}}' # resource parameter
awslogs-region: !Ref 'AWS::Region'
awslogs-stream-prefix: '{{service_instance.name}}' # resource parameter
# The service_instance. The service is a resource which allows you to run multiple
# copies of a type of task, and gather up their logs and metrics, as well
# as monitor the number of running tasks and replace any that have crashed
Service:
Type: AWS::ECS::Service
DependsOn: LoadBalancerRule
Properties:
ServiceName: '{{service_instance.name}}' # resource parameter
Cluster: '{{environment.outputs.ClusterName}}' # output reference to an environment infrastructure as code file
LaunchType: FARGATE
DeploymentConfiguration:
MaximumPercent: 200
MinimumHealthyPercent: 75
DesiredCount: '{{service_instance.inputs.desired_count}}'# input parameter
NetworkConfiguration:
AwsvpcConfiguration:
AssignPublicIp: ENABLED
SecurityGroups:
- '{{environment.outputs.ContainerSecurityGroup}}' # output reference to an environment infrastructure as code file
Subnets:
- '{{environment.outputs.PublicSubnetOne}}' # output reference to an environment infrastructure as code file
- '{{environment.outputs.PublicSubnetTwo}}' # output reference to an environment infrastructure as code file
TaskDefinition: !Ref 'TaskDefinition'
LoadBalancers:
- ContainerName: '{{service_instance.name}}' # resource parameter
ContainerPort: '{{service_instance.inputs.port}}' # input parameter
TargetGroupArn: !Ref 'TargetGroup'
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