Automating renewal of Let's Encrypt certificates with Home Assistant OS

I had an alert from my monitoring tool that the Let’s Encrypt TLS certificate for my Home Assistant OS installation had expired. The answer lay in the documentation for the Let’s Encrypt app: Certificates are not renewed automatically by the plugin. The app has to be started again to renew certificates. If the app is started again, it checks if the certificates are due for renewal. This is usually the case 30 days before the certificates’ due date. If the certificates are not due for renewal, the app terminates without changes. If the certificates are due for renewal, new certificates will be created. There are multiple ways how the app can be started to check/renew the certificates. One way to automate the certificate renewal is to configure a Home Assistant automation to restart this app every night via the Supervisor app restart action. My automation looks like this: alias: Restart Let's Encrypt each night description: '' triggers: - trigger: time at: '22:00:00' weekday: - mon -…

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