Volume mounting SSH keys not working

[HeathNaylor]

I am attempting to pass in my local SSH private key. To do so I am volume mounting ~/.ssh/id_rsa into /root/.ssh/id_rsa. This is the command I am using:

docker run -v `pwd`:/app -v ~/.ssh:/root/.ssh composer install

When it gets down to my private repository as described by the composer.lock file, I get the following error (private information substituted with filler text):

Installing myorg/mypackage (1.0.0): Downloading (failed)    Failed to download myorg/mypackage from dist: The "https://api.gi
thub.com/repos/myorg/mypackage/zipball/<random_hash>" file could not be downloaded (HTTP/1.1 404 Not Found)

Now trying to download from source
  - Installing myorg/mypackage (1.0.0): Cloning <random_hash>

  [RuntimeException]

  Failed to execute git clone --no-checkout 'git@github.com:myorg/mypackage.git' '/app/vendor/myorg/mypackage' && cd '/app/vendor/
myorg/mypackage' && git remote add composer 'git@github.com:myorg/mypackage.git' && git fetch composer

[alcohol]

did you try running that command manually inside the container by launching a shell instead of composer to see what error git returns?

[alcohol]

one of the frequent causes for this kind of error is when the ssh key is owned by a user that the git process cannot recognize (you need to mount /etc/passwd and /etc/group into the container as well - read-only recommended).

[HeathNaylor]

I will work on getting directly into the container and seeing permissions today.