我正在尝试使用AWS::CloudFormation::Stack
资源类型将CloudFormation模板嵌套到另一个模板中。嵌套模板的参数类型为List<AWS::EC2::Subnet::Id>
。
单独地,嵌套模板运行得很好。但是,当嵌入AWS控制台时,遇到不受支持的属性ELBSubnetList 。
将参数的类型更改为String / CommaSeparated列表似乎是一种解决方法,如同here所述,但在通过AWS控制台以交互方式创建模板时,我将失去花哨的UI。
您是否知道如何将子网ID列表作为参数传递?
这是嵌入式模板:
{
"AWSTemplateFormatVersion" : "2010-09-09",
"Parameters" : {
"ELBSubnetList" : {
"Type" : "List<AWS::EC2::Subnet::Id>",
"Description" : "Subnet List for Elastic Loadbalancer"
},
"ELBSecurityGroupList": {
"Type": "List<AWS::EC2::SecurityGroup::Id>",
"Description": "Security Group List for Elastic Loadbalancer"
}
},
"Resources" : {
"ELB" : {
"Type" : "AWS::ElasticLoadBalancing::LoadBalancer",
"Properties" : {
"Subnets": { "Ref": "ELBSubnetList" },
"CrossZone" : "true",
"SecurityGroups": { "Ref": "ELBSecurityGroupList" },
"LBCookieStickinessPolicy" : [ {
"PolicyName" : "CookieBasedPolicy",
"CookieExpirationPeriod" : "30"
}],
"Listeners" : [ {
"LoadBalancerPort" : "80",
"InstancePort" : "80",
"Protocol" : "HTTP",
"PolicyNames" : [ "CookieBasedPolicy" ]
} ],
"HealthCheck" : {
"Target" : "HTTP:80/wordpress/wp-admin/install.php",
"HealthyThreshold" : "2",
"UnhealthyThreshold" : "5",
"Interval" : "10",
"Timeout" : "5"
}
}
}
}
}
嵌入的模板:
{
"AWSTemplateFormatVersion" : "2010-09-09",
"Parameters": {
"ChildTemplate": {
"Type": "String",
"Default": "https://s3.eu-central-1.amazonaws.com/cf-templates-xxxxxxxxxxx-eu-central-1/sample_child.template"
},
"ELBSubnetList" : {
"Type" : "List<AWS::EC2::Subnet::Id>",
"Description" : "Subnet List for Elastic Loadbalancer"
},
"ELBSecurityGroupList": {
"Type": "List<AWS::EC2::SecurityGroup::Id>",
"Description": "Security Group List for Elastic Loadbalancer"
}
},
"Resources": {
"Child": {
"Type": "AWS::CloudFormation::Stack",
"Properties": {
"TemplateURL": { "Ref": "ChildTemplate" },
"Parameters": {
"ELBSubnetList": { "Ref": "ELBSubnetList" },
"ELBSecurityGroupList": { "Ref": "ELBSecurityGroupList" }
}
}
}
}
}
答案 0 :(得分:4)
在YAML中你需要&#34;分裂&#34;使用Select选择子网。例如,有两个子网:
!Join [",", [!Select [0, !Ref Subnets], !Select [1, !Ref Subnets]]]
答案 1 :(得分:2)
列表可以转换为字符串,反之亦然。所以工作调用是
{
"AWSTemplateFormatVersion" : "2010-09-09",
"Parameters": {
"ChildTemplate": {
"Type": "String",
"Default": "https://s3.eu-central-1.amazonaws.com/cf-templates-xxxxxxxxxxx-eu-central-1/sample_child.template"
},
"ELBSubnetList" : {
"Type" : "List<AWS::EC2::Subnet::Id>",
"Description" : "Subnet List for Elastic Loadbalancer"
},
"ELBSecurityGroupList": {
"Type": "List<AWS::EC2::SecurityGroup::Id>",
"Description": "Security Group List for Elastic Loadbalancer"
}
},
"Resources": {
"Child": {
"Type": "AWS::CloudFormation::Stack",
"Properties": {
"TemplateURL": { "Ref": "ChildTemplate" },
"Parameters": {
"ELBSubnetList": {"Fn::Join": [",", { "Ref": "ELBSubnetList" }]},
"ELBSecurityGroupList": {"Fn::Join": [",", { "Ref": "ELBSecurityGroupList" }]}
}
}
}
}
}
答案 2 :(得分:2)
使用以下摘录成功地在YAML中构建:
Parameters:
pSubnetIDs:
Description: The array of Subnet IDs for the Subnet group
Type: List<AWS::EC2::Subnet::Id>
Resources:
rDBSubnetGroup:
Type: "AWS::RDS::DBSubnetGroup"
Properties:
DBSubnetGroupDescription: The subnet group for the RDS instance
SubnetIds: !Ref pSubnetIDs
我尝试了很多!Join和!Ref的变体,但均未成功。事实证明,这只是列表的简单提示!
答案 3 :(得分:2)
要将SubnetId列表转换为字符串列表,请同时使用JOIN和SPLIT的组合。
TLDR;
在YAML中,添加
!Split [',', !Join [',', !Ref SubnetIds]]
完整答案分为2部分。
这里SubnetIds
是类型Subnet.Id
的列表。 JOIN
将所有ID合并为
一弦。例如,以JOIN
作为分隔符的子网ID ,
的列表如下:
[abc, def, hij]
=> "abc,def,hij"
。
现在,让我们获取第1部分的输出,以及分隔符SPLIT
上的,
。
"abc,def,hij"
=> ["abc", "def", "hij"]
这是我创建计划任务的用例的一个例子:
AWSTemplateFormatVersion: '2010-09-09'
Parameters
SubnetIds:
Type: List<AWS::EC2::Subnet::Id>
Description: Select at least two subnets in your selected VPC.
ScheduleTask:
Type: AWS::Events::Rule
Properties:
Description: !Sub 'Trigger Sitemap Generation according to the specified schedule'
ScheduleExpression: !Ref CronExpression
State: ENABLED
Targets:
- Id: 'targetId'
Arn: !GetAtt ECSCluster.Arn
RoleArn: !GetAtt ECSEventsRole.Arn
EcsParameters:
TaskDefinitionArn: !Ref TaskDefinition
TaskCount: 1
LaunchType: 'FARGATE'
PlatformVersion: 'LATEST'
NetworkConfiguration:
AwsVpcConfiguration:
AssignPublicIp: ENABLED
SecurityGroups:
- !Ref SecurityGroup
Subnets: !Split [',', !Join [',', !Ref SubnetIds]]