Fix CloudFormation Error: 'The provided target group has target type instance, which is incompatible with the awsvpc network mode specified in the task definition'

Recently I needed to create a Network Load Balancer through CF and while creating the target group I stumbled upon this error: The provided target group has target type instance, which is incompatible with the awsvpc network mode specified in the task definition. Let’s see how I resolved the error.

Prerequisites

• AWS Account
• CloudFormation Access

Solution

The issue points to you that either in your target group you have set TargetType: instance or you don’t have defined TargetType at all.

1. If you have set TargetType: instance you need to change it to TargetType: ip.
2. If you don’t have defined TargetType attribute you need to add TargetType: ip as well.

Here I’m going to paste an example of mine that resolves the issue:

  NlbTargetGroup:
    Type: AWS::ElasticLoadBalancingV2::TargetGroup
    Properties:
      Name: !Sub "${Env}-${Service}-nlb-tg"
      Port: !Ref NLBPort
      Protocol: TCP
      TargetType: ip
      ...

Conclusion

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