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Fabian Peter Hammerle 78a4a5c20f upgrade openssh-server package from v9.7_p1-r{3→4} (security fixes)		4 mesiacov pred
.github	5177b2ff4e Bump docker/build-push-action from 6.1.0 to 6.2.0 (#73)	4 mesiacov pred
CHANGELOG.md	ea67bc0f8a sshd: terminate/timeout session if client does not respond to keep alive requests for 5 minutes	1 rok pred
Dockerfile	78a4a5c20f upgrade openssh-server package from v9.7_p1-r{3→4} (security fixes)	4 mesiacov pred
Makefile	a890c27fad release v0.1.0	3 rokov pred
README.md	c532b69d3e authorize keys in `SSH_CLIENT_PUBLIC_KEYS_ALL` to access all repositories	2 rokov pred
docker-compose.yml	c532b69d3e authorize keys in `SSH_CLIENT_PUBLIC_KEYS_ALL` to access all repositories	2 rokov pred
entrypoint.sh	c532b69d3e authorize keys in `SSH_CLIENT_PUBLIC_KEYS_ALL` to access all repositories	2 rokov pred
sshd_config	ea67bc0f8a sshd: terminate/timeout session if client does not respond to keep alive requests for 5 minutes	1 rok pred
tini-package-log.url	c8082e11d3 upgrade alpine base image from v3.17.3 to v3.18.0 including upgrade of borgbackup package from v1.2.4-r0 to v1.2.4-r4 & openssh-server package from v9.1_p1-r2 to v9.3_p1-r3	1 rok pred

docker: borgbackup-sshd 💾 🐳 🐙

Single-user OpenSSH server restricted to BorgBackup backend

$ sudo docker run --name borgbackup_sshd \
    -v ssh_host_keys:/etc/ssh/host_keys:rw \
    -v /somewhere:/repository:rw \
    --tmpfs /home/borg/.ssh:mode=1777,size=16k \
    --tmpfs /tmp:mode=1777,size=1M \
    -p 2200:2200 \
    -e SSH_CLIENT_PUBLIC_KEYS="$(cat ~/.ssh/id_*.pub)" \
    -e SSH_CLIENT_PUBLIC_KEYS_APPEND_ONLY="$(cat optional-append-only-keys.pub)" \
    --read-only --security-opt=no-new-privileges --cap-drop=ALL \
    docker.io/fphammerle/borgbackup-sshd

$ borg init --encryption=editme ssh://borg@127.0.0.1:2200//repository

$ borg create --stats ssh://borg@127.0.0.1:2200//repository::{hostname}-{utcnow} \
    ~/documents ~/photos ...

sudo docker may be replaced with podman.

Pre-built docker images are available at https://hub.docker.com/r/fphammerle/borgbackup-sshd/tags (mirror: https://quay.io/repository/fphammerle/borgbackup-sshd?tab=tags)

Annotation of signed git tags docker/* contains docker image digests: https://github.com/fphammerle/docker-borgbackup-sshd/tags

Detached signatures of images are available at https://github.com/fphammerle/container-image-sigstore (exluding automatically built latest tag).

Add Additional Repositories

$ sudo docker run --name borgbackup_sshd \
    -v repo_foo:/some/where/repo-foo \
    -e REPO_PATH_foo=/some/where/repo-foo \
    -e SSH_CLIENT_PUBLIC_KEYS_foo="$(cat keys-foo.pub)" \
    -e SSH_CLIENT_PUBLIC_KEYS_APPEND_ONLY_foo="$(cat keys-foo-append-only.pub)" \
    ...
    -v repo_bar:/some/where/else/bar \
    -e REPO_PATH_bar=/some/where/else/bar \
    -e SSH_CLIENT_PUBLIC_KEYS_bar="$(cat keys-bar.pub)" \
    -e SSH_CLIENT_PUBLIC_KEYS_APPEND_ONLY_bar="$(cat keys-bar-append-only.pub)" \
    ...

Currently, individual keys may be authorized either for a single repository or for all repositories via SSH_CLIENT_PUBLIC_KEYS_ALL:

$ sudo docker run --name borgbackup_sshd \
    -v repo_foo:/some/where/repo-foo \
    -e REPO_PATH_foo=/some/where/repo-foo \
    -v repo_bar:/some/where/else/bar \
    -e REPO_PATH_bar=/some/where/else/bar \
    ...
    -e SSH_CLIENT_PUBLIC_KEYS_ALL="$(cat ~/.ssh/id_*.pub)" \
    ...

Docker Compose 🐙

git clone https://github.com/fphammerle/docker-borgbackup-sshd
Add public keys to docker-compose.yml
docker-compose up --build

README.md

docker: borgbackup-sshd 💾 🐳 🐙

Add Additional Repositories

Docker Compose 🐙