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config-rs
⚙️ Layered configuration system for Rust applications (with strong support for 12-factor applications).
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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.
I've been using Config most of the time. I also use once_cell to make it a static variable.
You could use SOPS and commit them (encrypted) to source control, then later decrypt them into environment variables when invoking the process which reads them.
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