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Deploying AWS SNS and Lambda with Terraform: A Step-by-Step Guide (and Fixing Errors Along the Way)
- This article provides a step-by-step guide for deploying AWS SNS and Lambda using Terraform, while also detailing the issues encountered and how to fix them.
- The first step is initializing Terraform in your project directory using the 'terraform init' command.
- Next, the author ran 'terraform fmt' and 'terraform validate' to ensure consistent formatting and validate syntax correctness.
- After running 'terraform plan' and reviewing it, the author then executed 'terraform apply' to provision resources and deployed the infrastructure.
- The author encountered errors while creating an IAM role for Lambda and discovered that it was due to lacking the necessary permissions to create roles.
- The author added the necessary permissions, ran 'terraform apply' again, and the role was created successfully.
- Another error was encountered during the Lambda function deployment, which resulted in incorrect ZIP file creation. The author learned that it is important to verify package contents before deployment.
- The author created the ZIP file with the necessary contents and dependencies, ran 'terraform apply', and the Lambda function was deployed correctly.
- After the successful creation of Lambda and SNS, the author added subscriptions and tested them by verifying the expected notifications were received.
- Proper cleanup is crucial, which is why the author details a cleanup process for Terraform that removes all AWS resources in the correct order.
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