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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Option #1 works fine. Have acme.sh setup as a docker container that is started once a month using a cron job (aka scheduled task). Everthing fully automatic, no need to do anything. Stuff is setup in a few minutes. Enough guides out there to follow.
Once you have set it up correctly no additional changes are required. I would suggest using https://ntfy.sh/ or https://pushover.net/ so that anytime it renews and updates or fails it will send push notification to your phone.
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