using daemonize

.gitignore

@@ -4,4 +4,3 @@ Cargo.lock
 **/*.rs.bk
 *.pdb
 /target
-nohup.out

Cargo.toml

@@ -6,5 +6,6 @@ edition = "2021"
 [dependencies]
 tokio = { version = "1.35.1", features = ["full"]}
 kagiyama = "0.3.0"
-mtemp = { git = "https://git.midefos.com/midefos/mtemp.git", branch = "main" }
 anyhow = "1.0.79"
+daemonize = "0.5.0"
+mtemp = "0.1.21"

src/main.rs

@@ -1,15 +1,34 @@
-use anyhow::Result;
+use anyhow::{anyhow, Context, Result};
+use daemonize::Daemonize;
 use kagiyama::prometheus::metrics::gauge::Gauge;
 use kagiyama::{AlwaysReady, Watcher};
 use mtemp::Mtemp;
 use std::env;
+use std::fs::File;
 use std::sync::atomic::AtomicU64;
-use tokio::spawn;
 use tokio::time::sleep;
 use tokio::time::Duration;
 
+fn main() -> Result<()> {
+    let name = "mtemp-monitor";
+    let stdout = File::create(format!("/tmp/{}.log", name)).context("Error creating log file")?;
+    let daemonize = Daemonize::new()
+        .pid_file(format!("/tmp/{}.pid", name))
+        .stdout(stdout)
+        .chown_pid_file(true)
+        .working_directory("/");
+
+    match daemonize.start() {
+        Ok(_) => {
+            println!("daemon started");
+            tokio_main()
+        }
+        Err(err) => Err(anyhow!("{:?}", err)),
+    }
+}
+
 #[tokio::main]
-async fn main() -> Result<()> {
+async fn tokio_main() -> Result<()> {
     let interval_secs: u64 = env::var("MTEMP_INTERVAL")
         .unwrap_or_else(|_| "1".to_string())
         .parse()?;
@@ -19,9 +38,6 @@ async fn main() -> Result<()> {
     let mut watcher = Watcher::<AlwaysReady>::default();
     watcher.start_server(addr.parse()?).await;
 
-    // CPU
-    {
-        spawn(async move {
     let interval = Duration::from_secs(interval_secs);
 
     let cpu_gauge = Gauge::<f64, AtomicU64>::default();
@@ -54,6 +70,9 @@ async fn main() -> Result<()> {
         );
     }
 
+    println!("interval set every {} seconds", interval_secs);
+    println!("listening on {}", addr);
+
     loop {
         sleep(interval).await;
         if let Some(cpu) = Mtemp::cpu() {
@@ -66,12 +85,4 @@ async fn main() -> Result<()> {
             disk_gauge.set(disk);
         }
     }
-        });
-    }
-
-    println!("interval set every {} seconds", interval_secs);
-    println!("listening on {}", addr);
-    tokio::signal::ctrl_c().await.unwrap();
-
-    Ok(())
 }

start.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
 
-nohup cargo r -r &
+cargo run --release 
 sleep 1
 echo "Monitor started"