davequick / docker-sshd

Dockerize your OpenSSH-server upon a lightweight alpine-image

Make your OpenSSH fly on Alpine

Overview

Use this Dockerfile / -image to start a sshd-server upon a lightweight Alpine container.

Features

• Always installs the latest OpenSSH-Version available for Alpine
• Password of "root"-user can be changed when starting the container using --env
• You can choose between ssh-keypair- and password auth

Extending this image

This image is designed to be as slim and vanilla as possible.
If you need additional Tools like git or bash-shell, I definetly recommend to build your own image on top of alpine-sshd:

FROM  hermsi/alpine-sshd:latest

RUN   apk add --no-cache --upgrade \
            git \
            bash

Basic Usage

Authentication by password

$ docker run --rm \
--publish=1337:22 \
--env ROOT_PASSWORD=MyRootPW123 \
hermsi/alpine-sshd

After the container is up you are able to ssh in it as root with the in --env provided password for "root"-user.

$ ssh [e-mail] -p 1337

Authentication by ssh-keypair

$ docker run --rm \
--publish=1337:22 \
--env KEYPAIR_LOGIN=true \
--volume /path/to/authorized_keys:/root/.ssh/authorized_keys \
hermsi/alpine-sshd

After the container is up you are able to ssh in it as root with a private-key which matches the provided public-key in authorized_keys for "root"-user.

$ ssh [e-mail] -p 1337 -i /path/to/private_key

Use with docker-compose

I built this image in order to use it along with a nginx and fpm-php container for transferring files via sftp. If you are interested in a Dockerfile which fulfills this need: this way