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health draft

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This commit is contained in:
Nikos Papadakis 2024-01-25 17:16:27 +02:00
parent 221b4348d8
commit 4c951a5bfe
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GPG key ID: 78871F9905ADFF02
4 changed files with 213 additions and 83 deletions
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44
Cargo.lock generated
View file

@ -487,6 +487,15 @@ dependencies = [
"signatory",
]
[[package]]
name = "ntapi"
version = "0.4.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e8a3895c6391c39d7fe7ebc444a87eb2991b2a0bc718fdabd071eec617fc68e4"
dependencies = [
"winapi",
]
[[package]]
name = "nu-ansi-term"
version = "0.46.0"
@ -656,7 +665,9 @@ version = "0.1.0"
dependencies = [
"anyhow",
"async-nats",
"serde",
"serde_json",
"sysinfo",
"tokio",
"tokio-stream",
"tracing",
@ -1032,6 +1043,20 @@ dependencies = [
"unicode-ident",
]
[[package]]
name = "sysinfo"
version = "0.30.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1fb4f3438c8f6389c864e61221cbc97e9bca98b4daf39a5beb7bea660f528bb2"
dependencies = [
"cfg-if",
"core-foundation-sys",
"libc",
"ntapi",
"once_cell",
"windows",
]
[[package]]
name = "thiserror"
version = "1.0.56"
@ -1309,6 +1334,25 @@ version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
[[package]]
name = "windows"
version = "0.52.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e48a53791691ab099e5e2ad123536d0fff50652600abaf43bbf952894110d0be"
dependencies = [
"windows-core",
"windows-targets 0.52.0",
]
[[package]]
name = "windows-core"
version = "0.52.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "33ab640c8d7e35bf8ba19b884ba838ceb4fba93a4e8c65a9059d08afcfc683d9"
dependencies = [
"windows-targets 0.52.0",
]
[[package]]
name = "windows-sys"
version = "0.48.0"

2
agent/Cargo.toml
View file

@ -6,7 +6,9 @@ edition = "2021"
[dependencies]
anyhow = "1.0.79"
async-nats = "0.33.0"
serde = { version = "1.0.195", features = ["derive"] }
serde_json = "1.0.111"
sysinfo = { version = "0.30.5", default-features = false }
tokio = { version = "1.35.1", features = ["full"] }
tokio-stream = { version = "0.1.14", default-features = false }
tracing = "0.1.40"

131
agent/src/health.rs Normal file
View file

@ -0,0 +1,131 @@
//! System health information and checking
use std::sync::Arc;
use serde::Serialize;
use tokio::sync::watch;
const MEMORY_USAGE_CRITICAL_THRESHOLD: f64 = 90.0;
const CPU_USAGE_CRITICAL_THRESHOLD: f32 = 90.0;
const DISK_USAGE_CRITICAL_THRESHOLD: f32 = 90.0;
pub struct System {
sys: sysinfo::System,
disks: sysinfo::Disks,
}
impl System {
pub fn new() -> Self {
Self {
sys: sysinfo::System::new(),
disks: sysinfo::Disks::new(),
}
}
pub fn refresh_resources(&mut self) {
use sysinfo::{CpuRefreshKind, MemoryRefreshKind};
self.sys.refresh_specifics(
sysinfo::RefreshKind::new()
.with_memory(MemoryRefreshKind::new().with_ram().with_swap())
.with_cpu(CpuRefreshKind::new().with_cpu_usage()),
);
self.disks.refresh_list();
}
pub fn system(&self) -> &sysinfo::System {
&self.sys
}
pub fn disks(&self) -> &sysinfo::Disks {
&self.disks
}
}
#[derive(Debug, Default, PartialEq, Serialize)]
pub enum Status {
#[default]
Normal,
MemoryWarning,
MemoryCritical,
CpuWarning,
CpuCritical,
DiskWarning,
DiskCritical,
}
#[derive(Debug, Serialize)]
pub struct Health {
status: Vec<Status>,
}
#[derive(Clone)]
pub struct HealthMonitor(Arc<watch::Sender<Health>>);
impl HealthMonitor {
pub fn new() -> Self {
let (sender, _) = watch::channel(Health {
status: [Status::default()].into(),
});
Self(Arc::new(sender))
}
pub fn check_system(&self, system: &System) {
let s = system.system();
let memory_usage = if s.total_memory() > 0 {
s.used_memory() as f64 * 100.0 / s.total_memory() as f64
} else {
0.0
};
let cpu_usage = s.global_cpu_info().cpu_usage();
// for d in system.disks().list() {
// let avail = if d.total_space() > 0 {
// (d.available_space() * 100 / d.total_space()) as u8
// } else {
// 0 as u8
// };
// }
self.0.send_if_modified(|health| {
let cpu_changed = if cpu_usage > CPU_USAGE_CRITICAL_THRESHOLD {
health
.status
.iter()
.find(|&it| *it == Status::CpuCritical)
.and(None)
.unwrap_or_else(|| {
health.status.push(Status::CpuCritical);
true
})
} else {
false
};
let mem_changed = if memory_usage > MEMORY_USAGE_CRITICAL_THRESHOLD {
health
.status
.iter()
.find(|&it| *it == Status::MemoryCritical)
.and(None)
.unwrap_or_else(|| {
health.status.push(Status::MemoryCritical);
true
})
} else {
false
};
dbg!(cpu_changed || mem_changed);
cpu_changed || mem_changed
});
}
pub fn monitor(&self) -> watch::Receiver<Health> {
self.0.subscribe()
}
}

119
agent/src/main.rs
View file

@ -1,7 +1,10 @@
use async_nats as nats;
use nats::{Client, ConnectOptions};
use std::time::Duration;
use async_nats::{Client, ConnectOptions};
use tracing::Level;
mod health;
#[tokio::main]
async fn main() -> anyhow::Result<()> {
let subscriber = tracing_subscriber::fmt()
@ -20,88 +23,38 @@ async fn main() -> anyhow::Result<()> {
.map_err(|err| err)?;
tracing::info!("connected to nats server");
wait_for_commands(client).await;
init_health_subsystem(client);
// wait_for_commands(client).await;
tokio::signal::ctrl_c().await?;
Ok(())
}
async fn wait_for_commands(_client: Client) {
// let mut sub = client
// .subscribe("agents.v1.demo_agent.cmd.*")
// .await
// .unwrap();
//
// let mut command_queue = CommandQueue::default();
//
// while let Some(msg) = sub.next().await {
// let suffix = msg.subject.trim_start_matches("agents.v1.demo_agent.cmd.");
//
// match suffix {
// "end" => {
// let key = std::str::from_utf8(&msg.payload).unwrap();
// command_queue.end_command(key);
// }
// key => {
// if let Some(mut receiver) = command_queue.add_command(key) {
// tokio::spawn(async move {
// while let Ok(()) = receiver.changed().await {
// let queue = receiver.borrow();
// while let Some(cmd) = queue.lock().unwrap().pop_back() {
// handle_command(cmd);
// }
// }
// });
// }
// }
// }
// }
fn init_health_subsystem(client: Client) {
let system = health::System::new();
let health_monitor = health::HealthMonitor::new();
let health_monitor_clone = health_monitor.clone();
std::thread::spawn(move || loop {
const REFRESH_INTERVAL: Duration = Duration::from_secs(1);
health_monitor.check_system(&system);
std::thread::sleep(REFRESH_INTERVAL);
});
tokio::spawn(async move {
let mut recv = health_monitor_clone.monitor();
while let Ok(()) = recv.changed().await {
let payload = serde_json::to_string(&*recv.borrow()).unwrap();
tracing::info!(%payload, "sending health event");
client
.publish("agents.v1.demo_agent.health", payload.into())
.await
.unwrap();
}
});
}
//
// fn handle_command(cmd: Command) {
// println!("{cmd:?}");
// }
//
// #[derive(Default)]
// struct CommandQueue(HashMap<String, watch::Sender<Mutex<VecDeque<Command>>>>);
//
// impl CommandQueue {
// pub fn add_command(&mut self, key: &str) -> Option<watch::Receiver<Mutex<VecDeque<Command>>>> {
// match self.0.get_mut(key) {
// Some(sender) => {
// sender.send_modify(|q| q.lock().unwrap().push_back(Command::Foo));
// None
// }
// None => {
// let (sender, receiver) = watch::channel(Mutex::new(VecDeque::new()));
// sender.send_modify(|q| q.lock().unwrap().push_back(Command::Foo));
// Some(receiver)
// }
// }
// }
//
// pub fn end_command(&mut self, key: &str) {
// self.0.remove(key);
// }
// }
//
// mod cmd {
// // use std::borrow::Cow;
//
// #[derive(Debug, Clone)]
// pub enum Command {
// Foo,
// }
//
// #[derive(Debug)]
// pub struct UnknownCommand<'a>(&'a str);
//
// impl<'a> TryFrom<&'a str> for Command {
// type Error = UnknownCommand<'a>;
//
// fn try_from(cmd: &'a str) -> Result<Self, Self::Error> {
// match cmd {
// "foo" => Ok(Command::Foo),
// _ => Err(UnknownCommand(cmd)),
// }
// }
// }
// }