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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

Viewing subset of posts matching the word "let's".

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):