---
title: "The October Fly Changelog: Preview Disks and DNS and Better Builtins"
description: "The October Fly changelog records platform and CLI updates, centered on preview persistent disks, configurable builtins, environment-variable configuration, and status monitoring. The new volumes commands let Fly applications create persistent disks whose data survives restarts, deployments, and suspension; the feature remains in preview. Applications can now set environment variables in fly.toml instead of using the secrets feature, while builtin settings expose controls such as Deno permissions and HTTPS auto-upgrading and logging for the static web server. flyctl 0.0.145 also adds Python/Procfile builtin support, a --watch status mode that polls every five seconds, a --rate option, default-org selection in init, and fixes for token checks and wildcard certificate domains."
---

# The October Fly Changelog: Preview Disks and DNS and Better Builtins

[Fly.io](https://yomu.fyi/company/fly-io) · Oct 27, 2020

**Type:** Announcement

## Summary

The October Fly changelog records platform and CLI updates, centered on preview persistent disks, configurable builtins, environment-variable configuration, and status monitoring. The new volumes commands let Fly applications create persistent disks whose data survives restarts, deployments, and suspension; the feature remains in preview. Applications can now set environment variables in fly.toml instead of using the secrets feature, while builtin settings expose controls such as Deno permissions and HTTPS auto-upgrading and logging for the static web server. flyctl 0.0.145 also adds Python/Procfile builtin support, a --watch status mode that polls every five seconds, a --rate option, default-org selection in init, and fixes for token checks and wildcard certificate domains.

## Context

The changelog presents significant changes to the Fly platform, tooling, and websites. It addresses persistent storage needs for applications, separates environment variables from the secrets feature, improves builtin configurability, and reduces the need to repeatedly check application status manually.

## Approach / What changed

The release adds preview volumes commands, an environment-variable section in fly.toml, configurable builtin settings, and status polling through --watch with an adjustable --rate. flyctl 0.0.145 also introduces a Python/Procfile builtin, updates existing builtins, changes init behavior, and includes fixes for token checks and wildcard certificate support.

## Takeaways

- Volumes provide persistent disks for Fly applications, with data surviving restarts, deployments, and suspension; the feature is explicitly marked as being in preview.
- Builtin settings add controls including permissions for the Deno builder and HTTPS auto-upgrading and logging options for the static website builtin.
- The new status --watch flag polls every five seconds by default, while --rate controls the refresh interval.

**Tags:** [Deployment](https://yomu.fyi/topic/deployment), [DNS](https://yomu.fyi/topic/dns), [Fly.io](https://yomu.fyi/topic/fly-io)

- Source: [Fly.io](https://fly.io/blog/the-october-fly-changelog-preview-disks-and-dns-and-better-builtins)
- Source URL: https://fly.io/blog/the-october-fly-changelog-preview-disks-and-dns-and-better-builtins
- Ingested by Yomu: 2026-09-03T01:24:32.754Z

[Read original post](https://fly.io/blog/the-october-fly-changelog-preview-disks-and-dns-and-better-builtins)