🎉 Init

.gitignore

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+/target
+/.env

.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/node-monitoring.iml" filepath="$PROJECT_DIR$/.idea/node-monitoring.iml" />
+    </modules>
+  </component>
+</project>

.idea/node-monitoring.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="EMPTY_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

Cargo.toml

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+[package]
+name = "node-monitoring"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+rocket = "0.5.1"
+libc = "0.2"

Dockerfile

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+# Stage 1: Build
+FROM rust:1.91.1-slim AS builder
+
+# Create app directory
+WORKDIR /usr/src/app
+
+# Copy source code
+COPY . .
+
+# Build the actual app
+RUN cargo build --release
+
+# Stage 2: Runtime
+FROM debian:stable-slim
+
+# Copy the compiled binary from the builder stage
+COPY --from=builder /usr/src/app/target/release/node-monitoring /usr/local/bin/node-monitoring
+
+CMD ["/usr/local/bin/node-monitoring"]

src/main.rs

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+use std::{env, ffi::CString};
+use libc::{statvfs};
+use rocket::http::Status;
+
+#[macro_use] extern crate rocket;
+
+#[get("/")]
+fn index() -> Result<String, Status> {
+    let host_path = env::var("HOST_PATH").unwrap_or_else(|_| "/".to_string());
+    let path = CString::new(host_path.clone()).map_err(|_| Status::InternalServerError)?;
+    let mut stat: statvfs = unsafe { std::mem::zeroed() };
+
+    let result = unsafe { statvfs(path.as_ptr(), &mut stat) };
+    if result == 0 {
+        let block_size = stat.f_frsize as u64;
+        let total = stat.f_blocks as u64 * block_size;
+        let free = stat.f_bfree as u64 * block_size;
+        let used = total - free;
+        let percentage_used = ((used as f64 / total as f64) * 100.0) as u64;
+
+        return Ok(format!("path:{}\ntotal-space:{}\nused-space:{}\npercentage_used:{}", host_path,total, used, percentage_used))
+    }
+    Err(Status::InternalServerError)
+}
+
+#[launch]
+fn rocket() -> _ {
+
+    println!("____  __        __    __  ___          _ __           _          ");
+    println!("__/ |/ /__  ___/ /__ /  |/  /__  ___  (_) /____  ____(_)__  ___ _");
+    println!("_/    / _ \\/ _  / -_) /|_/ / _ \\/ _ \\/ / __/ _ \\/ __/ / _ \\/ _ `/");
+    println!("/_/|_/\\___/\\_,_/\\__/_/  /_/\\___/_//_/_/\\__/\\___/_/ /_/_//_/\\_, / ");
+    println!("                                                          /___/  ");
+    rocket::custom(rocket::Config { address: "0.0.0.0".parse().unwrap(), port: 8080, ..Default::default() }).mount("/", routes![index])
+}