jswny
New mix releases environment variables at runtime
Hi all! I haven’t worked with Elixir since v1.7. I was just checking out the new mix release functionality and I was thinking about how I used to work with environment variables before.
Is there a way with the new mix release process to read environment variables at runtime? Or do they still have to be populated when compiling the release? For example, I want to compile a release tarball, then send it to my remote server, then run it with a specific port specified at runtime with an environment variable.
Thanks!
Marked As Solved
hauleth
According to this part of the docs the config/releases.exs will be evaluated on each start of the release, which mean you can use System.fetch_env/1 there and it will work as expected.
Also Liked
LostKobrakai
config/releases.exs is evaluated on startup of the release.
akoutmos
If you are looking for a tutorial style application that leverages Mix releases, I put something together on my blog using Docker: Multi-stage Docker Builds and Elixir 1.9 Releases-Alex Koutmos | Engineering Blog
Step 2 is where I go over using a release.ex file. Hopefully that helps guide you in the right direction.
Popular in Questions
Other popular topics
Latest on Elixir Forum
Sponsor Spotlight
Build Elixir applications with speed and confidence.
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
- #websockets
- #supervisor
- #advent-of-code
- #elixirconf-us
- #distillery
- #processes
- #forms
- #api
- #metaprogramming
- #security
- #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.
Real-time error tracking, performance insights, and observability for devs.
Practical resources that improve the lives of professional developers.
Develop your skills with books, videos, and courses.
Producing high quality Elixir screencasts since 2017.
Courses that'll move you from confusion to "Aha, now I get it!"