Setting environment variable in a docker container

Question

I am trying to set environment variables in a docker container but I get the following error

 starting container process caused "exec: \"-e\": executable file not found in $PATH": unknown

Here is how I set the variables

docker run image -e ENV_VAR= '{"a":{"b":"c"}}' -p 3000:3000

What am I missing?

BMitch · Accepted Answer · 2018-11-06 19:47:22Z

3

The docker command is order sensitive. Everything after the image name is the command you want to run inside the container. Place the image name after the flags to the run command:

docker run -e ENV_VAR='{"a":{"b":"c"}}' -p 3000:3000 image

answered Nov 6, 2018 at 19:47

BMitch

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3 Comments

user_mda Over a year ago

That gives me another error docker: invalid reference format.

BMitch Over a year ago

@user_mda your image name is wrong, or you have something else wrong in your command. Without a real example I cannot say which.

user_mda Over a year ago

Nevermind it works , I had an extra space in between the env variable.

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