do apps deploy to multiple regions automatically?

joel · March 1, 2022, 3:14am

I’m building a Remix blog based on Kent C. Dodds’s and it’s going pretty well but when I get to Redis LRU cache it fails initially trying to connect to replicas in regions I haven’t intentionally set my app to function/deploy to:

github.com

joelhooks/joelhooks-remix-blog/blob/main/app/utils/redis.server.ts#L37-L44

      
        
            const PRIMARY_REGION = isMultiRegion
              ? getRequiredServerEnvVar('PRIMARY_REGION')
              : null
            const FLY_REGION = isMultiRegion ? getRequiredServerEnvVar('FLY_REGION') : null
            
            
if (FLY_REGION) {
              replica.host = `${FLY_REGION}.${replica.host}`
            }

The FLY_REGION appears to be “random” and if I add that region as a mounted volume it starts working after a minute.

This is a poorly explained problem and I’m out of my depth, but could use some help if possible

Alex_Piechowski · March 1, 2022, 3:51am

I’m guessing this has to do with fly’s backup regions.
I personally disabled them for similar reasons.

You can disable them with fly regions backup $PRIMARY_REGION

joel · March 1, 2022, 4:12am

hero! thanks so much

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do apps deploy to multiple regions automatically?

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