The November Fly Changelog

More example applications, enhancements to the Fly command line and more. This is what’s new on Fly in November 2020.

Example Applications

We’ve been focussing on getting more example applications for Fly into your hands. Each guide is complete with a walkthrough of how they were put together so you can see the power of Fly in action. Or you can hop straight to the Github repositories for each and use the files there to deploy immediately. There are guides for:

One thing this set of Guides do is make use of the - currently in preview - persistent Volumes support for Fly apps, aka writable disk space. They are used here for everything from database persistence and data storage, to preserving state in programming environments and queuing up messages. And more example applications are on the way.

Importable secrets

We’ve added an import command to fly secrets to let you import secrets in bulk into an app. Just create a “key=value” file of settings and pipe it into fly secrets import and they will be transferred to the app in one block. As an added bonus, you can create multiline secrets by surrounding that value in two pairs of three double quotes:

key="""This is an
example of a 
multiline value."""

Other changes

There’s a whole bunch of other enhancements and bug fixes in the Fly CLI. More options in the fly list apps command to help filter and sort through your applications. More JSON output to assist developers building automation. The Deno builtin now supports a Version setting which defaults to 1.5.4; as newer Deno release appear it makes it easier to either pin to an older version or track the latest developments. Read the full changelog below for more details.

This is the Fly Changelog where we list all significant changes to the Fly platform, tooling, and websites. You can also use the RSS feed of just changelog posts available on or consult our dedicated ChangeLog page with all the recent updates.

Over November

Fly Platform

  • Virtual machines: Upgraded to Firecracker v0.23.
  • Improved handling of the connections being shutdown during restarts.
  • Improved counting of connections/actions to prevent restarts causing tasks to prematurely end.
  • Fixes for slow downloads triggering timeouts.
  • Improved isolation of application’s context and connections.

Fly Web

30th November

flyctl: Version 0.0.151 released

  • Deno builtin now supports Version as a setting, the default is now 1.5.4.
  • Support --json for list orgs and builtins list.
  • Crash logs now show the previous 30 lines of log
  • list apps now shows humanized time (add -e/–exact for precise time)
  • list apps now sorted by name (use –sort created to sort by creation date)
  • Removed black text from titles (User contribution: thanks @fornwall).
  • Fixes for internal port handling in init.

16th November

flyctl: Version 0.0.150 released

  • Removed logs deduplicator (no longer needed).

12th November

flyctl: Version 0.0.149 released

  • Fixed fly dash [metrics] command.

flyctl: Version 0.0.148 released

  • Improved image resolution for deployment.

11th November

flyctl: Version 0.0.147 released

  • Added secrets import (from stdin) and multiline secrets import.
  • Fixed no change in secrets false error.

4th November

flyctl: Version 0.0.146 released

  • Added progress spinner to resume.
  • Show the initial region of a new app when running fly init.
  • improved error handling when API server is not available.