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[英]Passing parameters of type List<AWS::EC2::Subnet::Id> to nested CloudFormation template
[英]CloudFormation, passing a List<AWS::EC2::Subnet::Id> parameter as a comma separated string?
如何将List<AWS::EC2::Subnet::Id>
类型的参数作为逗号分隔的字符串传递?
我有以下模板:
{
"AWSTemplateFormatVersion": "2010-09-09",
"Parameters": {
"PrivateSubnets": {
"Description": "The private subnets in which Beanstalk EC2 instances will created",
"Type": "List<AWS::EC2::Subnet::Id>"
},
"PublicSubnets": {
"Description": "The public subnets in which the Beanstalk ELBs will be created",
"Type": "List<AWS::EC2::Subnet::Id>"
}
},
"Resources": {
"MyApp": {
"Type": "AWS::ElasticBeanstalk::Application",
"Properties": {
"ApplicationName": "MyApp",
"Description": "AWS Elastic Beanstalk Application"
}
},
"ConfigTemplate": {
"Type": "AWS::ElasticBeanstalk::ConfigurationTemplate",
"Properties": {
"ApplicationName": { "Ref": "MyApp" },
"Description": "Microsite Beanstalk config template",
"OptionSettings": [
{ "Namespace": "aws:ec2:vpc", "OptionName": "ELBSubnets", "Value": { "Ref": "PublicSubnets" } },
{ "Namespace": "aws:ec2:vpc", "OptionName": "Subnets", "Value": { "Ref": "PrivateSubnets"} }
],
"SolutionStackName": "64bit Amazon Linux 2016.03 v2.1.7 running PHP 5.6"
}
}
}
}
当我尝试创建堆栈时,出现以下错误:
CREATE_FAILED AWS::ElasticBeanstalk::ConfigurationTemplate ConfigTemplate 属性值的值必须是字符串类型
尝试使用Fn:Join
将私有和公共子网的内容写为逗号分隔的字符串,例如
{ "Namespace": "aws:ec2:vpc", "OptionName": "ELBSubnets", "Value": { "Fn:Join": [",", { "Ref": "PublicSubnets" }]} },
{ "Namespace": "aws:ec2:vpc", "OptionName": "Subnets", "Value": { "Fn:Join": [",", { "Ref": "PrivateSubnets"}]} },
导致
模板验证错误:模板错误:遇到不受支持的函数:Fn:Join 支持的函数有:[Fn::Base64、Fn::GetAtt、Fn::GetAZs、Fn::ImportValue、Fn::Join、Fn::FindInMap、Fn ::Select、Ref、Fn::Equals、Fn::If、Fn::Not、Condition、Fn::And、Fn::Or、Fn::Contains、Fn::EachMemberEquals、Fn::EachMemberIn、Fn: :ValueOf、Fn::ValueOfAll、Fn::RefAll、Fn::Sub]
根据http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/command-options-general.html#command-options-general-ec2vpc,您需要提供一个逗号分隔的列表。 所以使用Fn::Join
(注意两个冒号)
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