docker-mysqldump-sshd/README.md

docker: openssh-server invoking mysqldump 💾 🐳

Create logical backups of mariadb and mysql databases via SSH.

Whenever a SSH client connects mysqldump will be executed.

Useful to fetch backups via rsnapshot. See rsnapshot.conf.example.

$ sudo docker run --rm --name mysqldump_ssh \
    -p 2200:2200 \
    -e SSH_CLIENT_PUBLIC_KEYS="$(cat ~/.ssh/id_*.pub)" \
    --tmpfs /home/dump/.ssh:mode=1777,size=16k \
    -e MYSQLDUMP_ARGS='--host=dbhost --user=dbuser --password=dbpass --all-databases' \
    --read-only --security-opt=no-new-privileges --cap-drop=ALL \
    docker.io/fphammerle/mysqldump-sshd
$ ssh -p 2200 -T dump@localhost
-- MariaDB dump 10.17  Distrib 10.4.10-MariaDB, for Linux (x86_64)
--
-- Host: database    Database: demo
-- ------------------------------------------------------
[…]

Git tags docker/* contain signed docker image digests: https://github.com/fphammerle/docker-mysqldump-sshd/tags

⚠️ MYSQLDUMP_ARGS=--password=... leaks the password to other users on the same machine, if /proc is mounted with hidepid=0 (default).

Docker Compose 🐙

1. git clone https://github.com/fphammerle/docker-mysqldump-sshd
2. cd docker-mysqldump-sshd
3. Adapt SSH_CLIENT_PUBLIC_KEYS and MYSQLDUMP_ARGS in docker-compose.yml.
4. docker-compose up --build