Samba + Greyhole in Docker

See helpers/samba-greyhole.service to learn how to run this Docker container.
This file can also be used to run this Docker container using systemd.
helpers/monit-samba-greyhole.conf can be used to monitor, and restart as needed, the systemd service. Just symlink it in the /etc/monit/conf.d/ or equivalent folder.

You will need /etc/samba and /var/lib/samba folders from a previously working Samba install, as well as an already configured greyhole.conf.

Make sure you mount (-v [host_path]:[container_path]) all the required folders referred to in your smb.conf (path = ... for all shares), and in your greyhole.conf (storage_pool_drive = ...)

You will need to edit your greyhole.conf to point to your host's IP address, instead of localhost, for db_host.
(I am myself using the mariadb/server:10.4 Docker image.)

If you'd like to be able to view/grep the Greyhole log files, make sure you put them in a folder that is mounted from your host.
Ref: greyhole_log_file & greyhole_error_log_file in your greyhole.conf)

Symlink helpers/greyhole.sh as /usr/local/bin/greyhole on your host, to be able to execute any greyhole ... command on you host (greyhole --fsck ..., greyhole --stats, greyhole --logs, etc.)

helpers/restart-greyhole.sh and helpers/restart-samba.sh can be used to restart the Greyhole and Samba daemons, within a running container, without having to restart the container itself.

Installation

Here's the script I am using to install & run this Docker container on a Debian Stretch host.

TARGET_PATH="/home/gb/samba-greyhole"
systemctl stop smbd nmbd
systemctl disable smbd nmbd
git clone https://github.com/gboudreau/samba-greyhole-docker.git "$TARGET_PATH"
# Change WorkingDirectory in helpers/samba-greyhole.service; also change the folders & files mounted using -v
mkdir -p /usr/share/greyhole/
ln -s "$TARGET_PATH/helpers/greyhole.sh" /usr/local/bin/greyhole
ln -s "$TARGET_PATH/helpers/greyhole-cp.sh" /usr/local/bin/cpgh
ln -s "$TARGET_PATH/helpers/samba-greyhole.service" /etc/systemd/system/samba-greyhole.service
systemctl enable samba-greyhole

Add Greyhole's cron jobs in your favorite crontab file (/etc/cron.d/greyhole, crontab -e, etc.):

#                Daily (conditional) fsck
0 3 * * Mon-Sat  /usr/local/bin/greyhole --fsck --if-conf-changed --email-report --dont-walk-metadata-store > /dev/null
#                Weekly (forced) fsck
0 3 * * Sun      rm -f /usr/share/greyhole/gh-disk-usage.log ; /usr/local/bin/greyhole --fsck --email-report --dont-walk-metadata-store --disk-usage-report > /dev/null
* * * * *        /usr/local/bin/greyhole --process-spool --keepalive > /dev/null