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plyr-redis#

self-hosted Redis on Fly.io for docket background tasks.

deployment#

# first time: create app and volume
fly apps create plyr-redis
fly volumes create redis_data --region iad --size 1 -a plyr-redis

# deploy
fly deploy -a plyr-redis

connecting from other fly apps#

Redis is accessible via Fly's private network:

redis://plyr-redis.internal:6379

Update DOCKET_URL secret on backend apps:

fly secrets set DOCKET_URL=redis://plyr-redis.internal:6379 -a relay-api
fly secrets set DOCKET_URL=redis://plyr-redis.internal:6379 -a relay-api-staging

configuration#

  • persistence: AOF (append-only file) enabled for durability
  • memory: 200MB max with LRU eviction
  • storage: 1GB volume mounted at /data

cost#

~$1.94/month (256MB shared-cpu VM) + $0.15/month (1GB volume) = ~$2.09/month

vs. Upstash pay-as-you-go which was costing ~$75/month at 37M commands.