Blazing Fast Microservices in Rust and Docker

Short overview of Rust and example of data generator application built with diesel, chrono, job_scheduler crates.

Transcript

1. Blazing Fast
   Microservices in Rust
   and Docker
   ALEXEY NOVAKOV, ULTRA TENDENDCY, MARCH 2020
   

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2. Rust
   - System programming
   language focused on
   safety and performance
   - Syntactically like C++
   - No explicit runtime
   - No Garbage Collector
   and no manual memory
   management like in C
   

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3. Applications
   of Rust today
   

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4. Web development, WebAssembly
   Command line utilities
   Games
   Operating Systems
   Networking
   Microcontroller programming
   Microservices (Cloud)
   Not for Big Data yet
   

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5. Build Tool and Crates
   ◦ Cargo.toml:
   [package]
   name = "data-gen"
   version = "0.1.0"
   [dependencies]
   rand = "0.7.3"
   chrono = "0.4"
   serde = "1.0"
   serde_derive = "1.0"
   job_scheduler = "*"
   

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6. What is great in Rust
   - Fast startup and small binary size
   - Generics and Traits
   - Explicit immutable vs. mutable aspect
   - Pattern Matching
   - Compiler Error Messages
   - Fast compilation if you come from JVM
   - No Null
   - No classes
   pub trait Formatter {
   fn fmt(&self) -> String;
   }
   

   impl Formatter for &str {
   fn fmt(&self) -> String {
   "[string: ".to_owned() + &self + "]"
   }
   }
   

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7. What is not so great in Rust
   - Dealing with "borrow checker" errors
   - No High-Order Types
   - Too verbose C++ like syntax, if you come from Scala or
   Haskell
   (semicolons, curly braces, lambdas )
   

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8. Use Case - Generate Random Data
   - Insert Data into Postgres database based on Cron expression
   - Run as Docker container
   

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9. Crates
   •diesel
   •serde_derive
   •job_scheduler
   •rand
   •chrono
   

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10. Results
    • Docker image Size: 7.79MB
    • Startup: 0m0,061s
    docker logs 35f048a38722
    [2020-03-24T11:03:13Z INFO data_gen] starting up
    [2020-03-24T11:03:13Z INFO data_gen] Data Generation Job scheduled with: 1/10 * * * * *
    [2020-03-24T11:03:21Z INFO data_gen] Generated records: 12
    [2020-03-24T11:03:31Z INFO data_gen] Generated records: 7
    

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11. Go to the Code
    https://github.com/novakov-alexey/data-gen
    

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12. Thank you! Questions?
    Alexey Novakov
    email:
    - alexey.novakov at ultratendency.com
    - novakov.alex at gmail.com
    Blog:
    https://medium.com/se-notes-by-alexey-novakov
    https://novakov-alexey.github.io/
    Code: https://github.com/novakov-alexey
    Twitter: @alexey_novakov
    

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