Title

# O Hai

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## Introduction

For those who don't know me, I am:

* [Recently married to Norma](http://redlinernotes.com/images/married.jpg)
  * I like when she makes fun of me.

* [Really into dogs, esp mine](http://redlinernotes.com/images/puppers.jpg)
  * I like when I make fun of them, which is always.

* [Really into synths](https://www.instagram.com/p/B-7Of3tBapk/)
  * I like when they go "boop"

* [Really into melee](https://gfycat.com/exaltedniftyamericanrobin-melee)
  * I like when I hit them harder than they hit me

* Currently a Senior Engineer at [Calendly][calendly]

* Former Instructor @ [FIS ATL](http://redlinernotes.com/images/graduation_day.jpg) and [TIY ATL](https://www.instagram.com/p/BljO_N4ApN5/)
  * I like talking to people about code and why computers are ridiculous

[calendly]: https://calendly.com/

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## The Deployment Lecture

### Incoming Hot Take

I don't like the idea of a deployment lecture.

What's the transferable skill? Mostly implementation details.

Use a different language or framework and you're likely to encounter entirely different errors.

But it's still important to get your apps up.

#### Outline

* Intro
* Hot Take / Outline  <-- you are here
* System Architecture: A Transferable Lesson
* Why is this hard?
* Wildly try to deploy something live and maybe finish
* Q & A / AMA / Let's talk about computers

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## System Architecture

Let's compare and contrast our local environment to a production environment.

What are some reasons companies might separate the apps in production?

* Biggest motivator is probably performance. Scale pieces independently.

* Frontend changes shouldn't require rebooting rails / full CI run, etc.

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## Why is this hard?

It's not dissimilar the first time you tried to do group work with git.

Why was that hard?

You could previous model the code as being in a _single_ state, but now it's in _multiple_ states depending on whose clone it is!

Now we revisit that in a new light: the code is running on your machine in one state _under one environment_ and running on a production machine _under another environment_.

The assumption that your local view is the authoritative one is no longer accurate.

You will be tempted to debug issues assuming that something is wrong in the code. We've been building this habit in you and it is a good one!

**It will never help you debug an environment difference.**

(Aside: Emcien horror story.)

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## Deployment Steps

0. You installed [Heroku CLI](https://devcenter.heroku.com/articles/heroku-cli) right?

1. Update backend to use postgres if not using it already.

2. `heroku create $APPNAME && git push heroku master`

3. `heroku run rails db:migrate`

4. `heroku run rails db:seed`

5. Update frontend to parameterize API_ROOT based on NODE_ENV.

6. `heroku create $APPNAME --buildpack mars/create-react-app && git push heroku master`

* Wait, why do I need some special buildpack option? 🤔

7. Don't forget to [enable CORS][enable-cors]!

8. 🎉🎉🎉 - Profit

[enable-cors]: https://medium.com/@admatbandara/setting-up-cors-to-my-rails-api-a6184e461a0f

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## Your Life in Production

* `heroku logs --tail` - your best friend

* `heroku run rails c` - the console is also still helpful

* `heroku run bash` - and you thought you couldn't get to terminal

* `debugger` and `byebug` - not even once
  * Consider adding a [pre-commit hook](https://fuzzyblog.io/blog/rails/2019/09/17/tiny-rails-tip-don-t-let-byebug-into-production.html)

### Some other gotchas

* File uploads on Heroku need to go to S3 or a cloud storage service
  * Why? Because every heroku deploy creates a brand new server and _throws away the old one_
* API tokens must be specified with `heroku env`!
  * Why? Because they shouldn't be committed to your code for security reasons.
  * How to run Rails app? Investigate [foreman][foreman] or do `MY_SECRET=foo rails s`
* I get errors deploying about my ruby/bundler version.
  * This is a mess. Talk to friends or instructors. Suggestion: Switch your repo to whatever is supported.

[foreman]: https://thoughtbot.com/blog/foreman-as-process-manager

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## Q & A

### Let's talk about computers.

## <3 ✨<3