Running a node.js script in Docker

Question

I have a node.js script that when it's executed it just run a process to copy two tables from one database to another one. If I run it in my local it works as it should, so there is no coding issue. My problem is, I want to put that node.js program inside a docker image and execute that image (and the node.js script) when I needed. I created the image but when I run it just say that was executed x amount of time ago, but it doesn't do what the script does.

Can anyone explain me what I can do to accomplish this?

Steps are:

I need to pass an optional parameter to npm like: npm start Initial.
I need to be able to do the same inside the container:.

I have a file.sh that do something like this:

#!/bin/bash
if [ $1 = "Initial" ]; then
    : npm start $1
else
    : npm start
fi

But again, when I run the docker with something like this :

docker run [image-name] Initial

It doesn't give me any error but is not executing my node.js script. My Dockerfile is something like this:

...
WORKDIR /usr/src/app

RUN npm install

COPY ./ ./

RUN ["chmod", "+x", "/usr/src/app/file.sh"]

ENTRYPOINT ["/usr/src/app/file.sh"]

Does your image build? Where did you get that syntax for the RUN command? docs.docker.com/engine/reference/run — SiKing
– SiKing, Commented Jun 30, 2020 at 21:00

Adiii · Accepted Answer · 2020-07-01 01:16:17Z

1

You did not share the base image, but one issue might be that the base image is base on alpine so #!/bin/bash this will not work, plus you need variable expansion with proper to avoid error on empty.

#!/bin/sh
if [ "${1}" = "Initial" ]; then
    npm start "${1}"
else
    npm start
fi

Here is the working example that you can try

git clone https://github.com/Adiii717/docker-npm-argument.git
cd docker-npm-argument;
docker-compose build
docker-compose up

or to pass argument

docker-compose run docker-npm-argument argument1 arguments

To check same with docker run command

docker run --rm docker-npm-argument "Initial"

output

Args passed to docker run command are [ initial ]
starting application

> [email protected] start /app
> node app.js "initial"

Node process arguments [ '/usr/local/bin/node', '/app/app.js', 'initial' ]

edited Jul 1, 2020 at 1:16

answered Jul 1, 2020 at 1:07

Adiii

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