fix: Ensure the healthcheck for a Target Group is legal #762
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A Target Group's healthcheck must have a timeout lower than the interval. Annoyingly, AWS CDK doesn't catch this and will happily synth a stack that violates this rule. This change checks that `timeout` is less than `interval` and throws otherwise to prevent synth from completing. See: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-elb-health-check.html#cfn-elb-healthcheck-timeout.
jacobwinch
approved these changes
Aug 26, 2021
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🎉 This PR is included in version 23.5.1 🎉 The release is available on: Your semantic-release bot 📦🚀 |
akash1810
added a commit
to guardian/cdk-playground
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Aug 26, 2021
This is to fix a healthcheck issue that's preventing the CFN stack from updating. See: guardian/cdk#762
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This has been fixed upstream now too in v1.121.0 - aws/aws-cdk#16107. Update: the change is only available when calling |
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What does this change?
A Target Group's healthcheck must have a timeout lower than the interval.
Annoyingly, AWS CDK doesn't catch this and will happily synth a stack that violates this rule. This change checks that
timeoutis less thanintervaland throws otherwise to prevent synth from completing.See: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-elb-health-check.html#cfn-elb-healthcheck-timeout.
This follows the changes made in #738.
Does this change require changes to existing projects or CDK CLI?
No.
Does this change require changes to the library documentation?
I don't think so.
How to test
See added test.
How can we measure success?
Illegal CloudFormation is caught early (at build time rather than runtime).
Have we considered potential risks?
n/a