How to set node ENV process.env.mysql-host with docker run?
Can i somehow do like this? docker run --mysql-host:127.0.0.1 -p 80:80 -d myApp
I am using FROM node:onbuild as image.
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3 Answers
Node's process.env is an object containing the user environment. Docker's CLI allows you to set the environment variable for the container using the -e or --env options.
You can run
docker run --env mysql_host=127.0.0.1 -p 80:80 -d myApp
To pass the mysql_host into the container.
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I don't know much about node, but I think you just need to do:
docker run -e mysql-host=127.0.0.1 -p 80:80 -d myApp
Note that this will look for mysql-host in the same container, not on the host, if that's what you're expecting. I think what you really want to do is:
$ docker run -d --name db mysql
...
$ docker run -d --link db:mysql-host -p 80:80 -d myApp
Which will run the myApp container linked to the db container and resolvable as "mysql-host" inside the myApp container with no need for environment variables.
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you could also set node ENV process.env.mysql-host inside your dockerfile
FROM node:latest
WORKDIR /home/app
ADD . /home/app
ENV PORT 3000
ENV mysql-host 127.0.0.1
EXPOSE 3000
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