From d69f8fdbacef8935eba1e693f7fe070013647d9c Mon Sep 17 00:00:00 2001
From: Jeffrey Serio <23226432+hyperreal64@users.noreply.github.com>
Date: Sun, 7 Jul 2024 10:17:47 -0500
Subject: [PATCH] Add rsync-backup & systemd units

---
 bin/rsync-backup                            | 29 +++++++++++++++++++++
 systemd/system/hyperreal.coffee-share.mount | 15 +++++++++++
 systemd/system/rsync-backup.service         | 14 ++++++++++
 systemd/system/rsync-backup.timer           |  9 +++++++
 4 files changed, 67 insertions(+)
 create mode 100644 bin/rsync-backup
 create mode 100644 systemd/system/hyperreal.coffee-share.mount
 create mode 100644 systemd/system/rsync-backup.service
 create mode 100644 systemd/system/rsync-backup.timer

diff --git a/bin/rsync-backup b/bin/rsync-backup
new file mode 100644
index 0000000..33deada
--- /dev/null
+++ b/bin/rsync-backup
@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+# A script to perform incremental backups with rsync
+# Source: https://linuxconfig.org/how-to-create-incremental-backups-using-rsync-on-linux
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+readonly BACKUP_DIR="/mnt/backup"
+readonly DATETIME
+DATETIME="$(date '+%Y-%m-%d_%H:%M:%S')"
+readonly BACKUP_PATH="${BACKUP_DIR}/${DATETIME}"
+readonly LATEST_LINK="${BACKUP_DIR}/latest"
+readonly TEMP_DIR
+TEMP_DIR=$(mktemp -d || echo "Failed to make temp dir"; exit 1)
+chmod 700 "${TEMP_DIR}"
+trap 'rm -rf "${TEMP_DIR}"; exit 0' 0 1 2 3 15
+
+mkdir -p "${BACKUP_DIR}"
+
+while read -r line; do
+    rsync -aAX "$line" "${TEMP_DIR}";
+done </etc/rsync-includes.txt
+
+rsync -av --delete "${TEMP_DIR}/" --link-dest "${LATEST_LINK}" --exclude=".cache" "${BACKUP_PATH}"
+
+rm -rf "${LATEST_LINK}"
+ln -s "${BACKUP_PATH}" "${LATEST_LINK}"
diff --git a/systemd/system/hyperreal.coffee-share.mount b/systemd/system/hyperreal.coffee-share.mount
new file mode 100644
index 0000000..30f819b
--- /dev/null
+++ b/systemd/system/hyperreal.coffee-share.mount
@@ -0,0 +1,15 @@
+[Unit]
+Description=hyperreal.coffee NFS share from TrueNAS (10.0.0.81)
+DefaultDependencies=no
+Conflicts=umount.target
+After=network-online.target remote-fs.target
+Before=umount.target
+
+[Mount]
+What=10.0.0.81:/mnt/coffeeNAS/hyperreal.coffee
+Where=/mnt/backup
+Type=nfs
+Options=defaults
+
+[Install]
+WantedBy=multi-user.target
diff --git a/systemd/system/rsync-backup.service b/systemd/system/rsync-backup.service
new file mode 100644
index 0000000..21f7454
--- /dev/null
+++ b/systemd/system/rsync-backup.service
@@ -0,0 +1,14 @@
+[Unit]
+Description=rsync-backup
+AssertFileIsExecutable=/usr/local/bin/rsync-backup
+Requires=hyperreal.coffee-share.mount
+After=hyperreal.coffee-share.mount
+
+[Service]
+Type=oneshot
+User=root
+Group=root
+ExecStart=/usr/local/bin/rsync-backup
+
+[Install]
+WantedBy=multi-user.target
diff --git a/systemd/system/rsync-backup.timer b/systemd/system/rsync-backup.timer
new file mode 100644
index 0000000..1c67349
--- /dev/null
+++ b/systemd/system/rsync-backup.timer
@@ -0,0 +1,9 @@
+[Unit]
+Description=rsync-backup
+
+[Timer]
+OnCalendar=weekly
+Persistent=true
+
+[Install]
+WantedBy=timers.target