Unable to run lambda in docker image - node.js

Question

I currently have an AWS Lambda that I've been working on that I would like to build and run from a docker image. I'm using the aws-lambda-node:16 image as my base image. But I can't seem to get the docker image to properly pick up the handler from my javascript file to run the lambda.
I have tested the lambda's execution outside the docker image with lambda-local and the lambda runs fine in my local environment. It just seems that something is up with the docker container.
My Dockerfile:
FROM amazon/aws-lambda-nodejs:16
COPY dist/blacklist-ips/app.js ${LAMBDA_TASK_ROOT}
COPY package.json pnpm-lock.yaml ${LAMBDA_TASK_ROOT}/
RUN npm i -g pnpm && pnpm install --production
CMD [ "app.handle" ]
My Webpack config:
import { resolve } from 'path';
import { default as webpack } from 'webpack';
import TerserPlugin from 'terser-webpack-plugin';
const config = (env: any, argv: any): webpack.Configuration => {
return {
mode: env.production ? 'production' : 'development',
entry: {
'blacklist-ips': resolve(__dirname, 'src', 'blacklist-ips', 'blacklist-ips.ts')
},
output: {
path: resolve(__dirname, 'dist'),
filename: '[name]/app.js',
libraryTarget: 'commonjs2'
},
devtool: false,
target: 'node',
externals: [
'#aws-sdk/client-cloudwatch-logs',
'#aws-sdk/client-wafv2',
'luxon',
'tslib'
],
resolve: {
extensions: [ '.ts', '.js', '.json' ]
},
module: {
rules: [
{
test: /.ts$/,
loader: 'ts-loader'
}
]
},
optimization: {
minimize: env.production,
minimizer: [
new TerserPlugin({
parallel: true,
terserOptions: {
mangle: false
}
})
]
}
}
}
export default config;
My handler function is being properly exported in the webpack bundle:
const handler = async () => {
...lambda logic
};
exports.handler = handler;
I'm stumped as to why it's not working correctly with the Docker container...

Answer 1

Your CMD is app.handle while your function name is handler. You should change the CMD to be app.handler.