Ansible vs Rust — Automation vs Systems Programming

Introduction

Ansible is a YAML-based IT automation tool. Rust is a systems programming language. They solve entirely different problems, but the comparison comes up because both are used in infrastructure tooling — Ansible automates infrastructure, while Rust is increasingly used to build the tools that manage infrastructure (like sudo-rs, ripgrep, and cloud-native CLIs).

Quick Comparison

When to Use Each

Use Ansible when:

• Configuring servers (packages, files, services, users)
• Orchestrating multi-host deployments
• Managing cloud resources (AWS, Azure, GCP)
• Running ad-hoc commands across a fleet
• You need non-programmers to contribute

Use Rust when:

• Building high-performance CLI tools
• Writing system daemons or services
• Creating custom Ansible modules (as binaries)
• Replacing fragile shell scripts with type-safe binaries
• Memory safety matters (security-critical tools)

Rust Tools in the Ansible Ecosystem

Several Rust-built tools are commonly managed by Ansible:

---
- name: Deploy Rust-built infrastructure tools
  hosts: all
  become: true
  tasks:
    - name: Install ripgrep (Rust-based grep)
      ansible.builtin.package:
        name: ripgrep
        state: present

    - name: Install fd (Rust-based find)
      ansible.builtin.package:
        name: fd-find
        state: present

    - name: Install bat (Rust-based cat)
      ansible.builtin.package:
        name: bat
        state: present

    - name: Install starship prompt
      ansible.builtin.shell:
        cmd: curl -sS https://starship.rs/install.sh | sh -s -- -y
      args:
        creates: /usr/local/bin/starship

Custom Ansible Module in Rust

You can write Ansible modules as Rust binaries that read JSON from stdin and write JSON to stdout:

// src/main.rs — Custom Ansible module in Rust
use serde::{Deserialize, Serialize};
use std::io::{self, Read};

#[derive(Deserialize)]
struct ModuleArgs {
    name: String,
    state: Option<String>,
}

#[derive(Serialize)]
struct ModuleResult {
    changed: bool,
    msg: String,
}

fn main() {
    let mut input = String::new();
    io::stdin().read_to_string(&mut input).unwrap();
    let args: ModuleArgs = serde_json::from_str(&input).unwrap();

    let state = args.state.unwrap_or_else(|| "present".to_string());
    let result = ModuleResult {
        changed: true,
        msg: format!("{} is {}", args.name, state),
    };

    println!("{}", serde_json::to_string(&result).unwrap());
}

# Compile and place in module path
cargo build --release
cp target/release/my_module ~/.ansible/plugins/modules/

sudo-rs: Rust Replacing C in Infrastructure

Ubuntu 26.04 ships sudo-rs — a Rust rewrite of sudo. Ansible manages it:

- name: Ensure sudo-rs is the default
  ansible.builtin.package:
    name: sudo-rs
    state: present

Related Articles

• Ansible vs Terraform
• Ansible Custom Module Development
• Ansible vs Chef
• Ansible Ubuntu 26.04 sudo-rs

Conclusion

Ansible and Rust aren't competitors. Ansible orchestrates infrastructure with YAML. Rust builds the high-performance tools that Ansible deploys. The modern infrastructure stack increasingly uses both: Ansible for automation, Rust for the binaries it manages.