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Scott Spence

How I got back online after AWS East went down

2 min read
Hey! Thanks for stopping by! Looks like this post was updated 11 months ago. Just bear in mind it was originally posted 11 months ago. If there's anything in here which doesn't make sense, please get in touch.

Ok, on 2023-06-13 there was an AWS outage and everyone that used AWS East was affected. I use Vercel for hosting and they use AWS for their edge rendering lambdas (in AWSEast) so I was affected.

I have some analytics I bring in from Fathom Analytics (which was also suffering from the outage) and what alerted me to the issue in the first place.

This also brought to my attention that I needed to add in better error handling for my analytics endpoints for if this happens again in the future.

Recovering From the AWS Outage

Nothing was building, I took the outage advice and switched the function region from iad1 to cle1 but that didn’t work for me, the builds finished but the site returned a 500 error.

Switching Off Edge Rendering

What I did was switch off edge rendering. It’s a nice to have for me and not a deal breaker and it was what was causing the builds to either fail or not finish.

In my endpoints I commented out the edge runtime config:

// export const config: ServerlessConfig = {
//   runtime: 'nodejs18.x',
// }

Then in my svelte.config.js file I commented out the edge runtime config:

kit: {
  // adapter: adapter({ runtime: 'edge' }),
  adapter: adapter(),

Using SvelteKit Auto Adapter

So, after that I thought it best not to use the Vercel SvelteKit adapter either. I installed and switched to the SvelteKit auto adapter:

pnpm i -D @sveltejs/adapter-auto

Then I switched out the adapter out at the top of my svelte.config.js file imports:

-import adapter from '@sveltejs/adapter-vercel'
+import adapter from '@sveltejs/adapter-auto'

This change allowed my website to function properly until the AWS outage was resolved. After the resolution, I switched back to the edge runtime.

Sort of begs the question, do I really need edge rendering? I’m not sure, I’ll see how it goes for now and I know how to switch it off if I need to.

Anyway, leaving this here for future reference.


Some useful bits I found:


Finding your way out of an AWS outage can (excuse the pun) put you on edge, but with the right steps, I managed to minimize downtime and keep my website running.

If you have any questions or need further clarification, feel free to get in touch.

There's a reactions leaderboard you can check out too.

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