Is it possible to create an Output of a stack like that at all:
TargetGroupARN1Part:
Description: the final portion of the target group ARN
Value:
Fn::Select:
- 5
- Fn::Split:
- ":"
- !Ref WebTG
When I try it I get:
Template format error: Invalid outputs property : [Fn::Select]
merci A
This should be working, as it worked on my tests.
You could also try the short form, such as:
TargetGroupARN1Part:
Description: the final portion of the target group ARN
Value: !Select [5, !Split [':', !Ref WebTG]]
Related
Please help me with the I'm using to create two ALB with the exception if a value is put in one of the parameters then will create an alb that has the instances id but if I pass two instances id in the parameter ELB1InstanceIds then it gave me an error:
Properties validation failed for resource HTTPTG1 with message: #/Targets/0/Id: expected type: String, found: JSONArray
earlier I was using parameter `Type: 'ListAWS::EC2::Instance::Id' but when i don't select any instance in ELB2InstanceIds then I got an error that it required a selected value then only stack can be run.
so I have created with the type string and passed an instance id, it is working with one instance id but not working when I specify two instances id in one of the parameters.
Parameters:
ELB1InstanceIds:
Type: String
Default: i-12345678
ELB2InstanceIds:
Type: String
Default: i-12345678
Conditions:
IsELB1InstanceIdsNotEmpty: !Not [!Equals [!Ref ELB1InstanceIds, "i-12345678"]]
IsELB2InstanceIdsNotEmpty: !Not [!Equals [!Ref ELB2InstanceIds, "i-12345678"]]
Resources:
HTTPTG1:
Type: 'AWS::ElasticLoadBalancingV2::TargetGroup'
Properties:
Targets:
- Id: !If
- IsELB1InstanceIdsNotEmpty
- - !Split [",", !Ref ELB1InstanceIds]
- !Ref 'AWS::NoValue'
HTTPTG2:
Type: 'AWS::ElasticLoadBalancingV2::TargetGroup'
Properties:
Targets:
- Id: !If
- IsELB2InstanceIdsNotEmpty
- - !Split [",", !Ref ELB2InstanceIds]
- !Ref 'AWS::NoValue'
earlier I was using two parameters ELB1InstanceIds, and ELB2InstanceIds with Type: 'List<AWS::EC2::Instance::Id>' but when I don't select any instance in ELB2InstanceIds then I got an error that it required a selected value then only stack can be run.
I have to add taskdefintion entry based on condition. Below is the template i created.
Conditions
IsProdEnv: !Equals [ !Ref envtype, "prod" ]
TaskDefinition:
Type: AWS::ECS::TaskDefinition
Properties:
ContainerDefinitions:
EntryPoint:
- !If [IsProdEnv, !Split [",", ["python3", "hello.py"]], "./script.sh"]
I'm getting
Template error: every Fn::Split object requires two parameters, (1) a string delimiter and (2) a string to be split or a function that returns a string to be split.
You have two strings instead of one: "python3" and "hello.py". You need to have one string, e.g. "python3, hello.py". How this string looks, depends on your use-case.
I have the following in my serverless yml file :
lambdaQueueFirstInvokePermission:
Type: AWS::Lambda::Permission
Properties:
FunctionName: ServiceLambdaFunctionQualifiedArn
Action: ‘lambda:InvokeFunction’
Principal: sqs.amazonaws.com
and I have the following in the Outputs section :
Outputs:
ServiceLambdaFunctionQualifiedArn:
Value:
‘Fn::GetAtt’: [ lambdaQueueFirst, Arn ]
this comes back with a message:
Template error: instance of Fn::GetAtt references undefined resource lambdaQueueFirst
Am I missing something and if so, what? since it is very little in terms of help or examples…
Also, is there a better of getting the lambda arn into the permissions code? if so, what is it?
You can use the environment variables to construct the ARN value. In your case, you can define a variable in your provider section like below. You might need to modify a little bit according to your application.
service: serverless App2
provider:
name: aws
runtime: python3.6
region: ap-southeast-2
stage: dev
environment:
AWS_ACCOUNT: 1234567890 # use your own AWS ACCOUNT number here
# define the ARN of the function that you want to invoke
FUNCTION_ARN: "arn:aws:lambda:${self:provider.region}:${self:provider.environment.AWS_ACCOUNT}:function:${self:service}-${self:provider.stage}-lambdaQueueFirst"
Outputs:
ServiceLambdaFunctionQualifiedArn:
Value: "${self:provider.environment.FUNCTION_ARN}"
See this and serverless variables for aws for example.
you can do this:
resources:
Resources:
LoggingLambdaPermission:
Type: AWS::Lambda::Permission
Properties:
FunctionName: { "Fn::GetAtt": ["LoghandlerLambdaFunction", "Arn" ] }
Action: lambda:InvokeFunction
Principal: { "Fn::Join" : ["", ["logs.", { "Ref" : "AWS::Region"}, ".amazonaws.com" ] ] }
reference:
https://github.com/andymac4182/serverless_example
I am trying to create an AWS CloudFormation template using YAML. I add a UserPool resource as follows. The user pool name & id should be obtained via a parameter value i.e., if the value of parameter paramUserPoolName is 'Sample', then:
UserPoolName = Sample
UserPool Resource Name = SampleUserPool i.e., concatenated value of 'paramUserPoolName + UserPool'
Parameters:
paramUserPoolName:
Type: String
Resources:
<I need 'paramUserPoolName + UserPool' here >:
Type: 'AWS::Cognito::UserPool'
Properties: {
"UserPoolName": paramUserPoolName
}
How can I dynamically create a resource id in CloudFormation template?
PS:
The following worked:
Resources:
SampleUserPool:
Type: 'AWS::Cognito::UserPool'
Properties:
UserPoolName: !Sub ${paramUserPoolName}UserPool
Use !Sub for that. You can also use !Join, but !Sub is easier.
Parameters:
paramUserPoolName:
Type: String
Resources:
Type: 'AWS::Cognito::UserPool'
Properties:
UserPoolName: !Sub ${paramUserPoolName}UserPool
I am trying to create a LaunchTemplate, which references an IamInstanceProfile, in my Cloudformation stack. Here is the code- i have omitted the irrelevant parts:
...
Resources:
ServerLaunchTemplate:
Type: 'AWS::EC2::LaunchTemplate'
Properties:
LaunchTemplateData:
InstanceType: !Ref InstanceType
SecurityGroups:
- !Ref SecGroup
IamInstanceProfile: !Ref ServerProfile
UserData:
...
ServerProfile:
Type: 'AWS::IAM::InstanceProfile'
Properties:
Path: /
Roles:
- !Ref ServerRole
...
The ServerProfile gets created successfully. However when the stack creation process reaches the step of creating the ServerLaunchTemplate, it fails with the error:
Property validation failure: [Value of property {/LaunchTemplateData/IamInstanceProfile} does not match type {Object}]
If i omit the reference to the IamInstanceProfile, the LaunchTemplate get created successfully.
According to the documentation and some examples this should work... Based on the error i understand, that the InstanceType field of the LaunchTemplate needs to reference an object, but "!Ref InstanceType" returns the resource id.
How can i fix this? How could i retrieve the object, that is presumably required by the "/LaunchTemplateData/IamInstanceProfile" field?
Thank you
Easy to miss in the docs: IamInstanceProfile requires an IamInstanceProfile Cloudformation object with the Arn of the referenced IamInstanceProfile being a property of it.
See https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-launchtemplate-launchtemplatedata.html#cfn-ec2-launchtemplate-launchtemplatedata-iaminstanceprofile and https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-launchtemplate-iaminstanceprofile.html.
This should work:
PortalLaunchTemplate:
Type: 'AWS::EC2::LaunchTemplate'
Properties:
LaunchTemplateName: !Sub ${InstanceName}-launch-template
LaunchTemplateData:
ImageId: !Ref AmiId
...
IamInstanceProfile:
Arn: !GetAtt InstanceProfile.Arn
What worked for me was:
"IamInstanceProfile":{ "Arn":
{
"Fn::Sub":"arn:aws:iam::${AWS::AccountId}:instanceprofile/${name_of_Instance_profile}"
}
Presumably because it requires the "Arn" value as a string.