sergibarroso / docker-openssh-server

Minimal docker image for a secure openssh server

docker-openssh-server

Description

This is a simple Docker container for an OpenSSH server.

The container is based on Debian slim Docker image.

Here are some specifics of this container:

• This image only allows key based authentication.
• The system user name is sshuser.
• sshuser is able to sudo any command as any user.

❗ Don't use this in production
Although is applies some best practices, this image is not intended to be used in production use it at your own risk.

Usage

Add authorized keys

The image uses the SSHUSER_AUTH_KEYS environment variable to set the authorized public keys. Keys can be one after the other with a comma separation e.g.:

SSHUSER_AUTH_KEYS="ssh-rsa ABCD[...]xwz90= test1@localhost, ssh-rsa EFGH[...]lmn12= test2@localhost, ssh-rsa ABCD[...]456= test3@localhost"

or just with one key:

SSHUSER_AUTH_KEYS="ssh-rsa ABCD[...]xwz90= test1@localhost"

Run Docker container

To run the Docker container you will need to:

• Expose the SSH port
• Set the SSHUSER_AUTH_KEYS environment variable

Here is an example command:

docker run -p 52222:22 -e SSHUSER_AUTH_KEYS="ssh-rsa ABCD[...]xwz90= test1@localhost" hiroru/docker-openssh-server