dockerfile-sftp

This is a simple alpine container that runs an OpenSSH single-account sftp-only server.

Example of docker build

The build requires 3 build arguments:

• USER: the username of the sftp account
• PASSWORD_HASH: the password's hash of the sftp account
• UID: the UID of the sftp's user

For security reason, the salt used to hash the password should be different for each build.

In the following example, the sftp docker image creates an account with the same username (and uid) as the user who runs the command with the password '1234sftp`.

docker build \
	--build-arg UID=$(id -u) \
	--build-arg USER=$(whoami) \
	--build-arg PASSWORD_HASH=$(openssl passwd -1 -salt $RANDOM 1234sftp)
	-t sftp https://github.com:/manoj23/dockerfile-sftp.git

Example of docker run

docker run --rm -ti -v $PWD/sftp/:/sftp/ sftp

Example of docker-compose.yml

Put in a folder:

• docker-compose.yml as below

version: '3'
services:
  sftp:
    build:
    context: https://github.com:/manoj23/dockerfile-sftp.git
    args:
      UID: 500
      USER: batman
      PASSWORD_HASH: "$$1$$21502$$9pCmk.3M64LxpmzD2ihVo/"
    volumes:
      - /path/to/sftp:/sftp

The dollar signes in the PASSWORD_HASH should be escaped with a dollar. docker-compose does not handle inline bash as value.