Fly.io

Abstract

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• Serverless Container Cloud Provier, come with free hosting!
• You can record down the app infra configuration with fly.toml, see Fly Launch configuration (fly.toml) · Fly Docs for more details

Fly.io CLi Cheatsheet

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Fly CLi Setup

brew install flyctl
 
fly auth login

App Management

fly apps list
 
fly ssh console -a <APP_NAME>
 
fly image update -a <APP_NAME> # Updates the app's image to the latest available version.
fly image update -a umami-self-host --image <IMAGE_ENDPOINT> # Full flexibility in the image we want to use

App Secrets Management

fly secrets list -a <APP_NAME>
 
fly secrets set <KEY>=<Value> -a <APP_NAME>

App Networking Management

fly ips list
 
fly certs add <CUSTOM_DOMAIN_ENDPOINT>
fly certs show <CUSTOM_DOMAIN_ENDPOINT>
fly certs delete <CUSTOM_DOMAIN_ENDPOINT>

• Fly.io App Port Forwarding

Postgres Management

fly postgres list
 
fly postgres connect -a <APP_NAME>

Fly.io SSL

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• I am using a custom Domain Name with my fly.io app. For some reason, the X.509 Certificate didn’t get auto-renew. This leads to the inaccessibility to the fly.io app. I suspect it is because by the Cloudflare DNS Proxy which causes the custom domain verification to fail. I had to stop the proxy, run fly certs delete <custom_domain_name> and fly certs create <custom_domain_name> to get a valid X.509 certificate again

Yes, I was right!

The only way for domain name verification to work with the Cloudflare DNS proxy on is to add a CNAME record to the domain zone file.