Failing to connect to Chrome within Docker container on Lambda

Question

We are trying to launch and connect to an instance of Google Chrome within a custom Docker container Lambda runtime. It runs locally 100% fine using Runtime Interface Emulator.

We think it may be due to a difference in the Docker config when running it on Lambda compared to locally, preventing our runtime from accessing `localhost`. We've tried many different suggestions instead of `localhost` and also tweaked the network settings on the Docker image, but with no luck.

Code: https://bitbucket.org/rapidspike/workspace/snippets/KMMa9B

On line 37 `remoteInterface()` can also take a host as well as a port, but it defaults to `localhost`. We have tried `0.0.0.0`, `http://host.docker.internal` and a bunch of other suggestions including using Lambda's env variables to get the IP of container at runtime.

Has anyone had similar problems or know of anything we should look into?

Answer

When you use a container image to package your lambda, the container is used only for packaging. It still runs the lambda like it would if your lambda was packaged as a zip file.

Having said that, I am not sure if this is going to be helpful, but there is an example of a browser from a lambda here - https://acloudguru.com/blog/engineering/serverless-browser-automation-with-aws-lambda-and-puppeteer

Failing to connect to Chrome within Docker container on Lambda

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