I’m trying to containerize so that I don’t have to mess around with different versions of Node (among other thing) for different projects. The title says it all, is it possible to run Serverless in a Docker container?
I created a Dockerfile:
FROM node:8-alpine
RUN apk update
RUN npm install -g serverless && \
npm install -g serverless-offline && \
npm install -g yarn
WORKDIR /usr/src/app
COPY package*.json ./
RUN yarn
COPY . .
EXPOSE 3000
CMD [ "sls", "offline" ]
Build it: docker build -t serverless/docker .
Run it: docker run -p 49160:3000 serverless/docker
Response: curl: (56) Recv failure: Connection reset by peer
Any help or links are greatly appreciated!
According to the serverless-offline documentation, you should use serverless offline start or sls offline start to run it.
Maybe using CMD [ "sls", "offline", "start" ] would help?
I probably should have elaborated a bit more. It runs fine inside the container and lists the routes etc.
Serverless: Starting Offline: local/us-east-1.
Serverless: Routes for test:
Serverless: GET /{name}
Serverless: Offline listening on http://localhost:3000
However trying to access it from my host machine at 0.0.0.0:49160 yields the ‘Connection reset by peer’ error.
In that case, maybe trying to change the host serverless-offline is listening on to 0.0.0.0 would help. You can do so by adding the snippet below to your serverless.yml.
custom:
serverless-offline:
host: 0.0.0.0
Thanks so much! That worked perfectly.
I’ve included a link to the example in case anybody else is curious.
https://gitlab.com/dupkey/serverless-examples/tree/master/docker-serverless-development-environment
Thanks @dupkey and @teddy-gustiaux this was useful.
In case anyone wants to set the host in the Dockerfile only you can do it like this
CMD [ "sls", "offline", "--host", "0.0.0.0" ]
I had some issues with my base image not being able to find the sls or serverless commands automatically and I ended up having to actually provide a path to the serverless bin file, I also created a Github Gist to hopefully give a little more help with this in the future to anyone needing a little bit more clarification.
Thanks to everyone on this thread for pointing me in the right direction with the host flag 
