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estani
Asked: 2014-05-21 00:53:51 +0800 CST

Why doesn't docker find a file I've added?

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So I've added a file using ADD in the docker file

...
ADD flvcheck /usr/local/bin/flvcheck

It build right and the file is there:

$ docker run --rm=true -ti image ls -l /usr/local/bin/flvcheck
-rwxrwxr-x 1 root root 1659908 May 20 07:56 /usr/local/bin/flvcheck

But When I try to run it I get:

$ docker run --rm=true -ti image /usr/local/bin/flvcheck
2014/05/20 08:43:25 no such file or directory

I did even install strace and use -D=true, but the problem is just that the file is being not found:

execve("/usr/local/bin/flvcheck", ["flvcheck"], [/* 8 vars */]) = -1 ENOENT (No such file or directory)

What is happening here? I can't find the issue (The file works ok in the host system and I can see it's contents within the docker

docker

1 Answers

  1. I've found out that this was because of the architecture. The Container was running a x86_64 image (default debian:squeeze) and the file is in i386.

    The red herring was because the file not found, did not referred to the file itself, but the file loader... now that's a useful error message...

    To sort this out just install the i386 libraries. For the ubuntu base image adding this to the dockerfile will solve your problem:

     RUN apt-get install -y ia32-libs

    For others (even newer ubuntu images), this might get trickier.

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