Investigate Fly.io App & Postgres Deployment

[nelsonic]

https://fly.io/docs/reference/postgres

[nelsonic]

Logging into the Fly Forum https://community.fly.io using GitHub OAuth requires "Act on your behalf" permissions ...

This feels like a violation of the principal of least privilege. 🤷‍♂️
I know it's "just" a Discourse instance, but I don't remember granting this for the Elixir Forum ... 💭

Reading: https://github.community/t/why-does-this-forum-need-permission-to-act-on-my-behalf/120453

[nelsonic]

After reading the entire thread, which was quite repetitive, the conclusion is that when people setup a Discourse Forum instance as a GitHub App instead of just using GitHub OAuth, the scopes have a terrible wording. Apparently it only gets access to Email Address.

It's the same case for: https://github.community

I would definitely prefer it if they updated their wording, this is terrible UX. 🤦
But I'm going to go ahead and use the Fly forum. 👍

[nelsonic]

https://www.crunchbase.com/organization/fly-io

[nelsonic]

As far as I'm concerned this is the deal-maker for me considering using Fly.io for Phoenix projects: 😍
https://twitter.com/chris_mccord/status/1428821074553315332

[nelsonic]

Continue: https://fly.io/docs/hands-on/start/

[nelsonic]

https://fly.io/docs/getting-started/elixir/

[nelsonic]

https://hexdocs.pm/phoenix/fly.html

[nelsonic]

https://fly.io/docs/about/pricing
The first thing on the pricing page is the "Free Tier": https://fly.io/docs/about/pricing/#free-tier

Looks we will be able to run the Hits App off "Free Tier" (except for the persistent storage ...)
One VM for the App and two for Postgres (with backup).

The VMs are reasonably priced: https://fly.io/docs/about/pricing/#virtual-machines

Persistent Volumes: https://fly.io/docs/about/pricing/#persistent-volumes $0.15/GB per month

200GB x $0.15 = $30/month

By contrast AWS Elastic Block Store (EBS) appears cheaper on the surface: https://aws.amazon.com/ebs/pricing/

The same 200GB on AWS EBS would cost $34.25/month ...

https://fly.io/docs/about/pricing/#postgresql-clusters

https://fly.io/docs/about/pricing/#outbound-data-transfer

Not suuuper happy about paying for outbound data transfers. Especially not $0.02/gb ... 💭 💸
We'll have to see if egress bandwidth becomes an issue. ⏳
back-of-the-envelope calculation:
1kb (per hit), 1000 projects, 1000 hits/month = 1Gb
If Fly.io gives us 160Gb of "free tier" bandwidth per month, then we can have 160M hits per month "free".
We will monitor this and if it gets out-of-hand we'll have to revise it. 👍

[nelsonic]

Hits app deployed to Fly.io: dwyl/hits#128

[nelsonic]

Investigation complete. App deployed. ✅
Next: dwyl/hits#130

[nelsonic]

The "usage" is a little concerning: https://fly.io/organizations/personal/usage

like why do they charge for accessing data in the DB 🤷‍♂️
surely it's on the same subnet and doesn't count as "outbound" ...? 💭

[nelsonic]

We're 1/3 through the month of November and we've used 12.6 GB of outbound data transfer:

This is good considering the "Free Tier" is 160 GB #72 (comment) and it was my only "concern" with using Fly.io. 💭

[nelsonic]

Continuous Deployment: dwyl/hits#133