I'm currently building a Docker container for my AWS Lambda function that's designed to process files from S3 buckets. However, I'm running into an issue where the function works beautifully when I run it locally, but after deployment, it fails because it claims that a certain library isn't installed. I'm quite new to Docker and AWS, so I'm a bit lost here. The specific error mentions that the R package "Lift" isn't installed, even though I confirmed that it's present in the local Docker image. What possible steps can I take to resolve this? Any insights would be greatly appreciated!
4 Answers
If your Lambda function is in NodeJS, keep in mind that the Node environment only uploads your code files by default. This means your 'node_modules' folder could be excluded unless explicitly included in the deployment package. Ensure you are adding it if that’s the case!
Consider whether using AWS Lambda is the right choice for your application. Depending on the values you are processing, it might be more efficient and cost-effective to use an EC2 instance instead. This way, you can handle larger files without the constraints of Lambda's execution environment.
It sounds like you're missing the installation of the 'Lift' package in your Dockerfile. Make sure you have it listed in the commands that build your Docker image. If you're using 'R' to install the package, it should look something like:
```Dockerfile
RUN R -e 'install.packages("Lift")'
```
Check if you are correctly pushing the built image to ECR after making these changes. Sometimes a simple missing line in the Dockerfile can cause issues like this.
Are you deploying using the SAM CLI? If so, ensure that your Docker image is specified correctly in your SAM template. The SAM CLI should automatically handle pushing the changes to ECR. If there's an issue with your deployment setup, it might look like the package isn't being included even if it's installed locally.
Yes, I'm using SAM CLI as part of the deployment. I'll double-check my SAM template for any mistakes.
Got it, I had 'Lift' in my local setup but forgot to include it in the Dockerfile when building. Thanks for the tip!