Add backup module for pleroma

roles/pleroma/tasks/main.yml

@@ -148,5 +148,9 @@
             name: pleroma.service
             state: started
             enabled: yes
-        # TODO: BACKUPS BACKUPS BACKUPS
+        - name: Template out backup module
+          template:
+            src: "backup.sh"
+            dest: "/opt/backups/modules/{{ pleroma_url }}.sh"
+            mode: "0600"
   become: yes

roles/pleroma/templates/backup.sh

@@ -0,0 +1,56 @@
+#! /bin/bash
+#
+# pleroma.sh
+# Backup script for Pleroma. Meant to be sourced by our main backup script
+# Copyright (C) 2020 Vintage Salt <rehashedsalt@cock.li>
+#
+# Distributed under terms of the MIT license.
+#
+
+set -e
+
+export OUTDIR="$BACKUPSDIR/{{ pleroma_url }}"
+retention=5 # 5-day retention period
+
+# Sanity checks
+if [ -z "$BACKUPSDIR" ]; then
+	log "BACKUPSDIR was undefined. Run the main backup script instead of this one."
+	return 1
+fi
+if ! [ -d "$OUTDIR" ]; then
+	if ! mkdir "$OUTDIR"; then
+		log "Unable to find or create output directory: $OUTDIR"
+		return 2
+	fi
+fi
+# Enforce permissions on our output directory since the git user will need them
+chown root.pleroma "$OUTDIR"
+chmod 770 "$OUTDIR"
+
+# Purge oldest backup if we need to
+currentbackupcount="$(ls -1 "$OUTDIR" | wc -l)"
+# Multiplying by two here because our backups are two-parters
+if (( currentbackupcount >= retention * 2 )); then
+	lastbackup="$(find "$OUTDIR" -name \*.tar.gz 2>/dev/null | sort | head -n 1)"
+	lastbackup="${lastbackup%-*.gz}"
+	if [ -f "$file" ]; then
+		log "Removing old backups for: $lastbackup"
+		for file in "$lastbackup"*; do
+			log "Removing old backup part: $file"
+			rm "$file"
+		done
+	fi
+fi
+# WE MAKE BACKUP NOW SERGEI
+date="$(date -Iseconds)"
+log "Stopping Pleroma"
+systemctl stop pleroma
+log "Creating DB backup"
+sudo -Hu postgres pg_dump -d pleroma --format=custom | gzip > "$OUTDIR/{{ pleroma_url }}-$date-db.pgdump.gz"
+log "Enabling Pleroma"
+systemctl start pleroma
+log "Creating uploads backup"
+tar czhf "$OUTDIR/{{ pleroma_url }}-$date-uploads.tar.gz" "/var/lib/pleroma/uploads"
+# Note that we don't tar up static, here
+# I personally manage that as a repo, so its state is easily restorable from Gitea
+