Alpine-based sshd server

This Docker image consists of a lightweight OpenSSH server running on Alpine Linux 3.6.

Usage

Host keys are generated on startup - use a volume to preserve them or create a new image based off this one that bakes them in.

Root access is disabled. Users can be created via environment variables as follows:

USER_xxx=yyy creates a user called xxx and adds the public key(s) yyy to their authorized_keys file.

USER_xxx=https://zzz creates a user called xxx and retrieves their public key(s) via the URL https://zzz. This allows for keys to be pulled from locations like Github and GitLab.

Example

$ docker run --rm USER_foo=https://github.com/foo.keys -p 8022:22 bravissimolabs/alpine-sshd
Creating user foo...
Server listening on 0.0.0.0 port 22.
Server listening on :: port 22.

$ ssh foo@localhost -p 8022

With a volume:

$ docker run --rm USER_foo=https://github.com/foo.keys -v /host/path:/etc/ssh
bravissimolabs/alpine-sshd

# SSH host keys written to /host/path

Changelog

2017-07-07 Initial version.