veimis

veimis

Programming Elixir 1.6 - Distillery-The Elixir Release Manager chapter commands for Elixir 1.9/Distillery 2.1

I hope this will prove useful for other readers of the book.

I was working through chapter 20 OTP: Applications and run to issues with the example for creating a release using Distillery.

The command mix release --env=prod failed with an error like

** (Mix) Could not invoke task “release”: 1 error found!
–env : Unknown option

Since Elixir 1.9 brings releases directly into Elixir, the mix release -command previously used with distillery now overlaps with the Elixir release command.
Distillery version 2.1 works with Elixir 1.9 and updates the distillery release command to mix distillery.release.

I made the following changes to be able to locally follow the distillery release example in the book.

Elixir and OTP versions used:

$ elixir --version
Erlang/OTP 23 [erts-11.0.2] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [hipe]

Elixir 1.10.4 (compiled with Erlang/OTP 22)

I don’t have relevant pages as my kindle only shows “locations”, but I have included the section topics.

Section “Your First Release”

1 Change dependency to distillery 2.1 in mix.exs
:x: {:distillery, “~> 1.5”, runtime: false}
:white_check_mark: {:distillery, “~> 2.1”, runtime: false}

2 Use the updated command for initializing the release
:x: mix release.init
:white_check_mark: mix distillery.init

3 Create the first release (0.0.1)
:x: mix release --env=prod
:white_check_mark: MIX_ENV=prod mix distillery.release --env=prod

This first failed for me (after following the book example) with

Release failed: could not load /path/config/config.exs

I got around it by adding a minimal config.exs file
mkdir config && echo “import Config” > config/config.exs

Side note:
In the book the deploy commands are run with ssh.
I tried, instead, to run the deploy commands directly from the _build -directory and found out that consecutive releases don’t work properly that way.

“I only just noticed that the original issue confirms that this issue was occurring because of running from _build.”
Successive hot upgrade releases produce error · Issue #160 · bitwalker/distillery · GitHub

This might be documented on the distillery documentation, but I haven’t made it there yet.

Section “A Second Release”

4 Create the first upgrade release (0.2.0)
:x: mix release --env=prod --upgrade
:white_check_mark: MIX_ENV=prod mix distillery.release --env=prod --upgrade

5 Upgrade running code
This might be because I didn’t use ssh, but instead just copied the archives to separate directory,
but the command deploy/bin/sequence upgrade 0.2.0 failed with

Node user@host is not running!

To successfully run the upgrade I changed the following:
Update node name, -name argument, in rel/vm.args with the right node name. You can check the node name in the iex console with Node.self command.
Not sure if relevant, but I updated the set cookie option (environment :prod) in rel/config.exs with the value in ~/.erlang.cookie

Section “Migrating Server State”
6. Create the second release
:x: mix release --env=prod --upgrade
:white_check_mark: MIX_ENV=prod mix distillery.release --env=prod --upgrade

That did it for me :relaxed:

Where Next?

Popular Pragmatic Bookshelf topics Top

iPaul
page 37 ANTLRInputStream input = new ANTLRInputStream(is); as of ANTLR 4 .8 should be: CharStream stream = CharStreams.fromStream(i...
New
jeffmcompsci
Title: Design and Build Great Web APIs - typo “https://company-atk.herokuapp.com/2258ie4t68jv” (page 19, third bullet in URL list) Typo:...
New
yulkin
your book suggests to use Image.toByteData() to convert image to bytes, however I get the following error: "the getter ‘toByteData’ isn’t...
New
mikecargal
Title: Hands-On Rust (Chapter 11: prefab) Just played a couple of amulet-less games. With a bit of debugging, I believe that your can_p...
New
New
leonW
I ran this command after installing the sample application: $ cards add do something --owner Brian And got a file not found error: Fil...
New
digitalbias
Title: Build a Weather Station with Elixir and Nerves: Problem connecting to Postgres with Grafana on (page 64) If you follow the defau...
New
mert
AWDWR 7, page 152, page 153: Hello everyone, I’m a little bit lost on the hotwire part. I didn’t fully understand it. On page 152 @rub...
New
New
dachristenson
I just bought this book to learn about Android development, and I’m already running into a major issue in Ch. 1, p. 20: “Update activity...
New

Other popular topics Top

New
Exadra37
Please tell us what is your preferred monitor setup for programming(not gaming) and why you have chosen it. Does your monitor have eye p...
New
AstonJ
You might be thinking we should just ask who’s not using VSCode :joy: however there are some new additions in the space that might give V...
New
AstonJ
Thanks to @foxtrottwist’s and @Tomas’s posts in this thread: Poll: Which code editor do you use? I bought Onivim! :nerd_face: https://on...
New
Exadra37
I am asking for any distro that only has the bare-bones to be able to get a shell in the server and then just install the packages as we ...
New
PragmaticBookshelf
Build highly interactive applications without ever leaving Elixir, the way the experts do. Let LiveView take care of performance, scalabi...
New
AstonJ
Seems like a lot of people caught it - just wondered whether any of you did? As far as I know I didn’t, but it wouldn’t surprise me if I...
New
PragmaticBookshelf
Create efficient, elegant software tests in pytest, Python's most powerful testing framework. Brian Okken @brianokken Edited by Kat...
New
PragmaticBookshelf
Author Spotlight Jamis Buck @jamis This month, we have the pleasure of spotlighting author Jamis Buck, who has written Mazes for Prog...
New
PragmaticBookshelf
Author Spotlight: Sophie DeBenedetto @SophieDeBenedetto The days of the traditional request-response web application are long gone, b...
New

Sub Categories: