webdav: add config

roles/webdav/files/webdav.data.backup.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+data_dir='/mnt/data1/webdav/data'
+snapshot_dir="${data_dir}.snapshot"
+
+# Read-only snapshot for atomic backup
+btrfs subvolume snapshot -r "$data_dir" "$snapshot_dir" || exit $?
+
+/usr/local/bin/restic backup "$snapshot_dir"
+
+# Always remove snapshot subvolume, even if restic fails
+btrfs subvolume delete "$snapshot_dir"

roles/webdav/files/webdav.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=WebDAV
+After=network.target network-online.target
+Requires=network-online.target
+
+[Service]
+Type=exec
+User=webdav
+Group=webdav
+ExecStart=/usr/local/bin/webdav --config /etc/webdav/config.toml
+
+Restart=always
+
+[Install]
+WantedBy=multi-user.target