Alan Edwardes

Cloud Software & Game Development
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Posts in 2022

  • Live GivEnergy PV Inverter Data in Home Assistant on 10th of Apr
  • Useful ffmpeg Recipes on 31st of Jan
  • Force Refresh Rocket.Chat Snap SSL Certificate via Caddy on 29th of Jan

Posts in 2021

  • Pushing to Public AWS Container Registry with GitHub Actions on 23rd of May
  • Graphing Sensor Data from a Raspberry Pi with Grafana on 22nd of May
  • Create Meshes from Height Maps using Blender on 16th of May
  • Recording Camera Animations for UE4 with a Phone on 15th of May
  • The Art of Mirror's Edge on 11th of Apr
  • Serving Static Websites Using Lambda@Edge on 20th of Mar
  • Thread Safe Random in C♯ on 16th of Mar
  • Spotting Fake Indie Game Key Requests on 11th of Mar
  • Jenkins Library for Unreal Engine 4 on 13th of Feb
  • Three Approaches to Readable Materials in First Person Games on 7th of Feb
  • Cheap Synthetic Monitoring with AWS Lambda on 24th of Jan

Posts in 2020

  • Generating Mipmaps for Render Targets in UE4 on 24th of Dec
  • Routing DNS over HTTPS Using Raspberry Pi on 6th of Oct
  • Tips for Building Games with Unreal Engine 4 on 3rd of Oct
  • Serving Localised Assets from S3 Using Lambda@Edge on 17th of May

Posts in 2019

  • Automating macOS Notarization for UE4 on 23rd of Nov

Posts in 2018

  • ISO Country Code to Unicode Flag in C♯ and JavaScript on 22nd of Jul
  • Serverless Git LFS for Game Development on 6th of Jan
  • Adding Custom Map Checks in UE4 on 3rd of Jan

Posts in 2017

  • Building and Deploying a React App Using AWS Lambda on 24th of Dec
  • Git HTTP Username and Password in Environment Variables on 22nd of Dec
  • Capturing and Uploading Screenshots in UE4 on 20th of Dec
  • Using Capsule Shadows on Large Objects in UE4 on 8th of Dec

Word "tls-alpn-01"

Viewing subset of posts matching the word "tls-alpn-01".

Force Refresh Rocket.Chat Snap SSL Certificate via Caddy

Posted January 29th, 2022 in cloud-software

I use Rocket.Chat installed via Snap on a Ubuntu VPS instance. The instance automatically manages its own SSL certificate via Caddy, using Let's Encrypt as the certificate issuer.

It has been working well for a few years, however today I opened up the web interface and was greeted by this error:

SEC_ERROR_REVOKED_CERTIFICATE

Fortunately I remembered the following email from Let's Encrypt, which I had completely ignored at the time:

Please immediately renew your TLS certificate(s) that were issued from Let's Encrypt using the TLS-ALPN-01 validation method and the following ACME registration (account) ID(s):

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© 2022 Alan Edwardes