Alpine SSH Client and Server

Minimal Alpine ssh client and server.

Quick Start

You can use the docker-compose file, to get up and running quickly.

$ export AUTHORIZED_KEY="ssh-rsa ..."
$ docker compose up -d server
$ docker compose run --rm client

If you do not have an SSH key, you can generate a passphrase-less one with:

$ ssh-keygen -t rsa -C "you@email.com" -f id_rsa -N ''

Usage

This usage pattern shows how to have both a server and a client as docker containers. If you need only one side of it, skip whatever is not relevant.

Network

First, create a network for the two containers to share:

$ docker network create -d bridge dockernet

Server

Create an environment variable with your public key, then start the server.

$ export AUTHORIZED_KEY="ssh-rsa ..."
$ docker run --rm -it -e AUTHORIZED_KEY \
  --network dockernet \
  --entrypoint /sshd-entrypoint \
  --name server \
  dannyben/sshd

Client

In another terminal, mount your private key and connect to the server:

$ docker run --rm -it \
  -v ~/.ssh/id_rsa:/root/.ssh/id_rsa:ro \
  --network dockernet \
  dannyben/sshd \
  ssh server

Additional Information

• dannyben/docker-sshd on GitHub
• dannyben/sshd on Docker Hub

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