bash file in docker isn't executing

Question

I want my bash file to run whenever I the run the docker image, so firstly I created the Dockerfile inside a new directory say demo and in that directory demo I created a new directory home and in that directory I’ve my bash file - testfile.sh. Here is my docker file -

FROM ubuntu
MAINTAINER Aman Kh
COPY . /home
CMD /home/testfile.sh

On building it with command - sudo docker build -t amankh99/hello . the following output was received -

Sending build context to Docker daemon 3.584kB
Step 1/4 : FROM ubuntu
—> 0458a4468cbc
Step 2/4 : MAINTAINER Aman Kh
—> Using cache
—> 98fbe31ed233
Step 3/4 : COPY . /home
—> Using cache
—> 7e52ff3439e2
Step 4/4 : CMD /home/testfile.sh
—> Using cache
—> 1d2660df6387
Successfully built 1d2660df6387
Successfully tagged amankh99/hello:latest

But when I run it with command

sudo docker run --name test -it amankh99/hello

it says

bin/sh: 1: /home/testfile.sh: not found

After having build successfully why it is unable to found the file. I want to convert this container in image and want to push on docker hub, so that when I can run this with simple run command as we run the hello-world(sudo docker run hello-world) , I get my bash file executed, so what changes in dockerfile can I do to acheive this.

@aerokite: If the mode was not executable, it would give: /bin/sh: 1: /home/testfile.sh: Permission denied — marcolz
– marcolz, Commented Feb 7, 2018 at 16:47
Looks like the testfile.sh is not in the same directory as your Dockerfile. Try: sudo docker run -it amankh99/hello /bin/bash -c "ls -l /home". — marcolz
– marcolz, Commented Feb 7, 2018 at 16:48

Shahriar · Accepted Answer · 2018-02-07 17:23:10Z

2

OP's Description

I created the Dockerfile inside a new directory say demo and in that directory demo I created a new directory home and in that directory I’ve my bash file - testfile.sh.

So according to your description

demo/
+--- Dockerfile
+--- home/
     +--- testfile.sh

You need to COPY home directory into /home

FROM ubuntu
COPY home /home
CMD /home/testfile.sh

If you do this COPY . /home, your home/testfile.sh will be copy into /home/home/testfile.sh

If you want copy only your testfile.sh, then do this

COPY home/testfile.sh /home/

edited Feb 7, 2018 at 17:23

answered Feb 7, 2018 at 16:54

Shahriar

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4 Comments

Shahriar Over a year ago

Read carefully, he has a home directory, then in that directory, he has the script. @marcolz

marcolz Over a year ago

Right, this is the most likely problem. @aerokite

itsmrbeltre Over a year ago

Thanks for the credit. @aerokite which i did not get for pointing out this.

Shahriar Over a year ago

@abeltre1, I didn't get you

marcolz · Accepted Answer · 2018-02-07 17:09:33Z

1

It either can find the file and it just does not know what to do with it because the interpreter of your script ( #!.... on the first line of your script) is not present in your docker image, or it cannot find the file because it was not copied.

You can verify this by passing /bin/bash as final argument to your docker run command, and run ls -l /home/testfile.sh and/or /home/testfile.sh on the prompt.

edited Feb 7, 2018 at 17:09

answered Feb 7, 2018 at 16:52

marcolz

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