ssh-添加到Docker容器中

Question

I've mounted the ~/.ssh directory into my development docker container from the host machine and trying to add the deployment key to the ssh agent in the entrypoint like this:

#!/bin/bash
set -e

#add the deployment key
if [[ ! -z ${DEPLOYMENT_SSH_KEY} ]] ; then
    echo "Adding deployment ssh key ${DEPLOYMENT_SSH_KEY} to ssh agent"
    eval $(ssh-agent -s) && ssh-add /.ssh/${DEPLOYMENT_SSH_KEY}
else
    echo "Deployment ssh key is not defined"
fi

echo "STARTING PHP FPM, CMD $@"

docker-php-entrypoint "$@"

The key gets normally added according to the logs:

Agent pid 8

Adding deployment ssh key id_rsa to ssh agent

Identity added: /.ssh/id_rsa (rsa w/o comment)

However, it actually ends up with no keys added to the agent and I can't clone my repos from inside the container. The command ssh-add -l executed in the container says

Could not open a connection to your authentication agent.

Why's that? I heard of the SSH agent forwarding as an alternative but I'm wondering why the method I've tried doesn't work?

Answer 1

Since ssh-add error message says "could not connect" it either can't find SSH_AUTH_SOCK environment variable or can't access socket path contained in that variable. Since ssh-agent use /tmp for the socket by default, guess your /tmp mountpoint is broken in some way.