(ssm): StringListParameter generate wrong CF template and does not work unlike StringParameter #14364
Description
Using StringListParameter produced a piece of CF template code that does not work. The code follows a different pattern compare to the working StringParameter. If use a workaround to make it follow the same pattern then it works.
Reproduction Steps
const securityGroupId = ssm.StringParameter.fromStringParameterName(this, 'EksClusterSecurityGroupId', 'EksClusterSecurityGroupId').stringValue
const subnetIds = ssm.StringListParameter.fromStringListParameterName(this, 'EksVpcSubnetIdsList', 'EksVpcSubnetIdsList').stringListValue
const subnetGroup = new ec.CfnSubnetGroup(this, 'RedisSubnetGroup', {
subnetIds: subnetIds,
description: 'SubnetGrop for GraphQL Redis'
});
const redis = new ec.CfnReplicationGroup(this, 'graphql-redis', {
engine: 'redis',
replicationGroupDescription: 'Redis replication group for GraphQL',
securityGroupIds: [securityGroupId],
cacheSubnetGroupName: subnetGroup.ref,
})The part of generated CF template relevant:
The StringParameter works
...
Parameters:
EksClusterSecurityGroupIdParameter:
Type: AWS::SSM::Parameter::Value<String>
Default: EksClusterSecurityGroupId
...
SecurityGroupIds:
- Ref: EksClusterSecurityGroupIdParameter
...
The StringListParameter part did not work:
SubnetIds:
Fn::Split:
- ","
- "{{resolve:ssm:EksVpcSubnetIdsList}}"
What did you expect to happen?
Expect to have the same behavior for String and StringList parameters. Expect the CF template looks like this:
Parameters:
EksClusterSecurityGroupIdParameter:
Type: AWS::SSM::Parameter::Value<String>
Default: EksClusterSecurityGroupId
EksVpcSubnetIdsListParameter:
Type: AWS::SSM::Parameter::Value<List<String>>
Default: EksVpcSubnetIdsList
...
SecurityGroupIds:
- Ref: EksClusterSecurityGroupIdParameter
...
SubnetIds:
Ref: EksVpcSubnetIdsListParameter
What actually happened?
Error when run cdk deploy:
4:07:02 PM | UPDATE_FAILED | AWS::ElastiCache::SubnetGroup | RedisSubnetGroup
Some input subnets in :[subnet-0a98619236902dd41,subnet-03dc3c44f20a5b2fd,subnet-0f777749ecdf46d39,subnet-07b25009783baa9c9] are invalid. (Service: AmazonElastiCache; Status Code: 400; Error Code: InvalidParameterValue; Request ID: f8765da2-a0a1-4b4e-b7f6-a4afe8b09780; Proxy: null)
Environment
- CDK CLI Version : 1.100.0
- Framework Version: 1.100.0
- Node.js Version:
- OS :
- Language (Version):
Other
There is a workaround to manually create a Parameter
const eksVpcSubnetIdsListParameter = new cdk.CfnParameter(this, 'subnetIds', {
type: 'AWS::SSM::Parameter::Value<List<String>>',
default: 'EksVpcSubnetIdsList',
})
const subnetGroup = new ec.CfnSubnetGroup(this, 'RedisSubnetGroup', {
subnetIds: eksVpcSubnetIdsListParameter.valueAsList,
description: 'SubnetGrop for GraphQL Redis'
});This is 🐛 Bug Report