M19: harden performance and recovery

deploy/unraid/backup-postgres.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+set -eu
+
+cd "$(dirname "$0")/../.."
+project="${COMPOSE_PROJECT_NAME:-mobilityops}"
+destination="${1:-backups/postgres}"
+timestamp="$(date -u +%Y%m%dT%H%M%SZ)"
+backup_file="${destination}/mobilityops-${timestamp}.dump"
+temporary_file="${backup_file}.partial"
+compose_files="-f compose.yaml -f compose.unraid.yaml"
+
+mkdir -p "$destination"
+trap 'rm -f "$temporary_file"' EXIT INT TERM
+
+docker compose -p "$project" $compose_files exec -T db sh -eu -c \
+  'pg_dump --format=custom --no-owner --no-acl -U "$POSTGRES_USER" "$POSTGRES_DB"' \
+  > "$temporary_file"
+
+docker compose -p "$project" $compose_files exec -T db pg_restore --list \
+  < "$temporary_file" > /dev/null
+mv "$temporary_file" "$backup_file"
+trap - EXIT INT TERM
+printf '%s\n' "$backup_file"