NS Env Config

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An env_logger-inspired one-stop configuration for name resolution based on abstract-ns.

Goals:

1. Make bootstrapping of small to medium size apps easier
2. Provide a standard way for configuring name resolution in rust ecosystem

Features:

1. Standard libc-based name resolution by default (using threads)
2. [TODO] Feature-gated other resolvers (async, consul,...)
3. If compiled in, resolvers are enabled by RUST_NS=resolver_name
4. Sane defaults for resolvers
5. Subscriptions are enabled by default (using polling if not available)
6. Some options configured from env (RUST_NS=resolver_name:option=value)
7. [TODO] Suffix-based resolution (RUST_NS=std,consul=consul-resolver)

Non-goals:

1. Covering every other way to resolve names
2. Covering all the settings of every resolvers

Usage

Standard Resolver

$ RUST_NS=std ./your-app

Since standard library resolver is not asynchronous we run resolver in a thread pool.

Parameters:

• poll_ivl -- polling interval for subscriptions in seconds, default 1
• threads -- number of threads for name resolution, default 4

Biggest declaration is something like this:

$ RUST_NS=std:poll_ivl=10:threads=16 ./your-app

License

Licensed under either of

• Apache License, Version 2.0, (./LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (./LICENSE-MIT or http://opensource.org/licenses/MIT) at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.