WIP Prepare postgres for migration by replication

site-cookbooks/kosmos_postgresql/files/dump_database.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+set -euo pipefail
+
+DB_NAME="${1:?Usage: $0 <database_name>}"
+
+cd /tmp
+
+pg_dump -Fd -j 4 -d "$DB_NAME" -f "dump_${DB_NAME}"
+tar -cf - "dump_${DB_NAME}" | zstd -19 -T0 > "dump_${DB_NAME}.tar.zst"
+rm -rf "dump_${DB_NAME}"