vira
Issue with Understanding Phoenix Project Deployment
Hi friends,
I am very new to Phoenix and PostgreSQL database. I am trying to deploy a simple very basic web app on fly.io to try to understand the deployment process so that I can adapt to my existing projects but I am very lost and confused. Here’s what I did.
mix phx.new Testing --app testing123
cd Testing
mix ecto.create
And then I used fly launch and fly deploy command. I got the following errors.
** (RuntimeError) environment variable DATABASE_URL is missing.
For example: ecto://USER:PASS@HOST/DATABASE
What I don’t understand here is the DATABASE_URL. How do I construct one?
When I do brew services list, I have postgresql@15 running already. If I do, psql testing123_dev and do \conninfo, I got "You are connected to database “testing123_dev” as user “sawwerakyawkyaw” via socket in “/tmp” at port “5432”.
Does that mean my DATABASE_URL is ecto://sawwerakyawkyaw:PASS@localhost:5432/testing123_dev?
Also, for each Phoenix project that I create, am I going to need unique DATABASE_URL for each one?
I am very lost and confused. If you can answer my questions or you know any resources to learn more about understanding postgres databases and/ or how to properly deploy, I would really appreciate it.
Many thanks.
Trending in Questions
Other Trending Topics
Latest Phoenix Threads
Latest on Elixir Forum
Sponsor Spotlight
We build reliable cloud platforms for business-critical systems.
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #deployment
- #library
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #channels
- #elixirconf
- #exunit
- #discussion
- #code-sync
- #javascript
- #podcasts
- #onsite
- #dialyzer
- #docker
- #authentication
- #umbrella
- #full-time-contract
- #podcasts-by-brainlid
- #ecto-query
- #elixir-ls
- #phoenix_html
- #iex
- #blog-post
- #graphql
- #genstage
- #ai
- #elixirconf-us
- #websockets
- #supervisor
- #advent-of-code
- #distillery
- #processes
- #api
- #forms
- #metaprogramming
- #hex
- #performance
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Error tracking, logs, uptime, and Just Enough APM. Built for developers.
Bringing learning, work and compliance together since 1987.
Producing high quality Elixir screencasts since 2017.
Enabling companies to succeed by building software people love.
The team behind Membrane, Popcorn, LiveDebugger. Available for hire.
Courses that'll move you from confusion to "Aha, now I get it!"
First 2 of 2 Posts
garrison
See the docs for Ecto URLs.
You have it running on your personal machine. If you are deploying an app to a service (Flyio) then you probably want a database running on that service too. They have a few different options, so consult their docs. I think the easy one was their integration with supabase, but they are working on their own managed postgres too. I would avoid their old “HA Postgres” non-managed offering (if it still exists), given it sounds like you’re new to this.
That depends on if you want a unique database for each one. Most likely you would use a separate database for each project, but Postgres can host multiple databases on the same server (confusingly called a “cluster”).
If you host multiple databases on the same server, you will probably have a unique user/database/pass for each one but the same host/port.
vira
Hey! Thank you so much. You have enlightened me about the deployment process. I actually start reading the fly.io documentation and I start to understand a lot things. This is just the beginning. People like you make the learning process much more fun!