From d4cee37c5a6440bfbfaa0e60251152e411be2073 Mon Sep 17 00:00:00 2001 From: SeanOMik Date: Mon, 16 Jan 2023 19:23:04 -0500 Subject: [PATCH] Initial commit --- .dockerignore | 2 + .gitignore | 2 + Cargo.lock | 1896 +++++++++++++++++++++++++++++++++++++++++++++++++ Cargo.toml | 15 + Dockerfile | 42 ++ LICENSE | 21 + README.md | 16 + shell.nix | 13 + src/main.rs | 429 +++++++++++ 9 files changed, 2436 insertions(+) create mode 100644 .dockerignore create mode 100644 .gitignore create mode 100644 Cargo.lock create mode 100644 Cargo.toml create mode 100644 Dockerfile create mode 100644 LICENSE create mode 100644 README.md create mode 100644 shell.nix create mode 100644 src/main.rs diff --git a/.dockerignore b/.dockerignore new file mode 100644 index 0000000..ccb5166 --- /dev/null +++ b/.dockerignore @@ -0,0 +1,2 @@ +/target +.vscode \ No newline at end of file diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..ccb5166 --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ 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"5.0.2+zstd.1.5.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "1d2a5585e04f9eea4b2a3d1eca508c4dee9592a89ef6f450c11719da0726f4db" +dependencies = [ + "libc", + "zstd-sys", +] + +[[package]] +name = "zstd-sys" +version = "2.0.5+zstd.1.5.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "edc50ffce891ad571e9f9afe5039c4837bede781ac4bb13052ed7ae695518596" +dependencies = [ + "cc", + "libc", + "pkg-config", +] diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..c9fb2cb --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,15 @@ +[package] +name = "zfs_promexporter" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +actix-web = "4" +prometheus = "0.13.3" +libzetta = "0.3.1" +log = "0.4" +fern = "0.6.1" +chrono = "0.4.23" +clap = { version = "4.0.23", features = [ "derive" ] } diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..c8bbede --- /dev/null +++ b/Dockerfile @@ -0,0 +1,42 @@ +FROM rust:alpine3.14 as builder + +# update packages +RUN apk update +RUN apk add zfs-dev build-base pkgconfig + +# Install rust toolchains +RUN rustup toolchain install stable +RUN rustup default stable + +# Build dependencies only. Separate these for caches +RUN cargo install cargo-build-deps + +# Copy application now +WORKDIR /app +COPY ./ /app + +RUN cargo build-deps --release + +# Build the release executable. +RUN cargo build --release + +# Runner stage. +FROM alpine + +# update packages +RUN apk update +RUN apk add zfs + +ARG UNAME=zfs_promexporter +ARG UID=1000 +ARG GID=1000 + +# Add user and copy the executable from the build stage. +RUN adduser --disabled-password --gecos "" $UNAME -s -G $GID -u $UID +COPY --from=builder --chown=$UID:$GID /app/target/release/zfs_promexporter /app/zfs_promexporter + +USER $UNAME + +WORKDIR /app + +ENTRYPOINT [ "/app/zfs_promexporter" ] \ No newline at end of file diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..3308230 --- /dev/null +++ b/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2022 SeanOMik + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. \ No newline at end of file diff --git a/README.md b/README.md new file mode 100644 index 0000000..8fb3b3a --- /dev/null +++ b/README.md @@ -0,0 +1,16 @@ +# ZFS Prometheus Metrics Exporter +ZFS metrics exporter for Prometheus! + +## Usage +``` +ZFS metrics exporter for Prometheus! + +Usage: zfs_promexporter [OPTIONS] + +Options: + -b, --bind-address The address to bind and listen from [default: 0.0.0.0] + -p, --port The port to listen on [default: 8080] + --log-level The lowest log level (off, error, warn, info, debug, or trace) [default: info] + -h, --help Print help + -V, --version Print version +``` \ No newline at end of file diff --git a/shell.nix b/shell.nix new file mode 100644 index 0000000..fe0368d --- /dev/null +++ b/shell.nix @@ -0,0 +1,13 @@ +{ pkgs ? import {} }: + +pkgs.mkShell { + # nativeBuildInputs is usually what you want -- tools you need to run + nativeBuildInputs = with pkgs; [ + gdb + lldb + pkg-config + zfs + git + rustup + ]; +} \ No newline at end of file diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..12725e3 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,429 @@ +use actix_web::{get, App, HttpServer, Responder}; +use actix_web::middleware::Logger; + +use libzetta::zpool::{ZpoolOpen3, ZpoolEngine, Vdev, Health, vdev::ErrorStatistics, Reason}; + +use prometheus::{Encoder, IntCounter, Registry}; + +use clap::Parser; + +use std::{collections::HashMap, string::FromUtf8Error, process::Command}; + +use log::{error, debug}; + +fn encode_metrics(reg: &Registry) -> Result { + let mut buffer: Vec = Vec::new(); + let encoder = prometheus::TextEncoder::new(); + encoder.encode(®.gather(), &mut buffer) + .unwrap(); // TODO + + String::from_utf8(buffer.clone()) +} + +fn register_intcounter(reg: &Registry, name: &str, help: &str, val: u64) -> prometheus::Result<()> { + let counter = IntCounter::new(name, help)?; + counter.inc_by(val); + reg.register(Box::new(counter))?; + + Ok(()) +} + +fn register_health(labels: HashMap, health: Health) -> prometheus::Result> { + let mut labels = labels; + labels.insert(String::from("field_type"), String::from("enum")); + + labels.insert(String::from("state"), String::from("online")); + let online_reg = Registry::new_custom(Some("zfs".to_string()), Some(labels.clone()))?; + let online_val = match health { + Health::Online => 1, + _ => 0, + }; + register_intcounter(&online_reg, "health", "The health of the device. This is an enum.", online_val)?; + + labels.insert(String::from("state"), String::from("degraded")); + let degraded_reg = Registry::new_custom(Some("zfs".to_string()), Some(labels.clone()))?; + let degraded_val = match health { + Health::Degraded => 1, + _ => 0, + }; + register_intcounter(°raded_reg, "health", "The health of the device. This is an enum.", degraded_val)?; + + labels.insert(String::from("state"), String::from("faulted")); + let faulted_reg = Registry::new_custom(Some("zfs".to_string()), Some(labels.clone()))?; + let faulted_val = match health { + Health::Faulted => 1, + _ => 0, + }; + register_intcounter(&faulted_reg, "health", "The health of the device. This is an enum.", faulted_val)?; + + labels.insert(String::from("state"), String::from("offline")); + let offline_reg = Registry::new_custom(Some("zfs".to_string()), Some(labels.clone()))?; + let offline_val = match health { + Health::Offline => 1, + _ => 0, + }; + register_intcounter(&offline_reg, "health", "The health of the device. This is an enum.", offline_val)?; + + labels.insert(String::from("state"), String::from("available")); + let available_reg = Registry::new_custom(Some("zfs".to_string()), Some(labels.clone()))?; + let available_val = match health { + Health::Available => 1, + _ => 0, + }; + register_intcounter(&available_reg, "health", "The health of the device. This is an enum.", available_val)?; + + labels.insert(String::from("state"), String::from("unavailable")); + let unavailable_reg = Registry::new_custom(Some("zfs".to_string()), Some(labels.clone()))?; + let unavailable_val = match health { + Health::Unavailable => 1, + _ => 0, + }; + register_intcounter(&unavailable_reg, "health", "The health of the device. This is an enum.", unavailable_val)?; + + labels.insert(String::from("state"), String::from("removed")); + let removed_reg = Registry::new_custom(Some("zfs".to_string()), Some(labels.clone()))?; + let removed_val = match health { + Health::Removed => 1, + _ => 0, + }; + register_intcounter(&removed_reg, "health", "The health of the device. This is an enum.", removed_val)?; + + Ok(vec![online_reg, degraded_reg, faulted_reg, offline_reg, available_reg, unavailable_reg, removed_reg]) +} + +fn register_error_stats(reg: &Registry, error_stats: ErrorStatistics) -> prometheus::Result<()> { + register_intcounter(reg, "read_errors", "The amount of I/O errors that occurred during reading", error_stats.read)?; + register_intcounter(reg, "write_errors", "The amount of I/O errors that occurred during writing", error_stats.write)?; + register_intcounter(reg, "checksum_errors", "The amount of checksum errors, meaning the device returned corrupted data from a read request", error_stats.checksum)?; + + Ok(()) +} + +fn register_vdev_stats(vdev: &Vdev, vdev_device: &Device, vdev_name: String, start_labels: HashMap) -> prometheus::Result { + let mut labels = start_labels.clone(); + labels.insert(String::from("device_type"), String::from("vdev")); + labels.remove("vdev"); // Remove vdev since its not needed because of "source_name" + labels.insert(String::from("device_name"), vdev_name.clone()); + + let vdev_reg = Registry::new_custom(Some("zfs".to_string()), Some(labels))?; + vdev_device.io_stats.collect_metrics(&vdev_reg)?; + register_error_stats(&vdev_reg, vdev.error_statistics().clone())?; + + register_intcounter(&vdev_reg, "drive_count", "Total count of drives in this pool or vdev", vdev.disks().len() as u64)?; + + Ok(vdev_reg) +} + +#[get("/metrics")] +async fn metrics_endpoint() -> impl Responder { + let zpool = ZpoolOpen3::default(); + let all_pools = zpool.all().unwrap(); // TODO: Dont unwrap + + let mut registries = Vec::new(); + + for pool in all_pools.iter() { + // Print some stuff that can be used for later features. + // My pool is in a healthy state currently, so I can't actually work on these + // to see what they output. + { + let logs = pool.logs(); + if logs.len() != 0 { + debug!("Found pool logs!: {:?}", logs); + } + + if let Some(errors) = pool.errors() { + debug!("Found pool errors!: {}", errors); + } + + // Currently reason is only a wrapper around String. + if let Some(Reason::Other(reason)) = pool.reason() { + debug!("Found pool 'reason': {}", reason); + } + } + + let mut labels = HashMap::new(); + labels.insert(String::from("device_type"), String::from("pool")); + labels.insert(String::from("pool"), pool.name().clone()); + labels.insert(String::from("device_name"), pool.name().clone()); + + // Create a registry for general pool metrics + let pool_reg = Registry::new_custom(Some("zfs".to_string()), Some(labels.clone())).unwrap(); + + register_intcounter(&pool_reg, "vdev_count", "Count of vdevs in this pool", pool.vdevs().len() as u64).unwrap(); + register_intcounter(&pool_reg, "spare_count", "The amount of spare drives", pool.spares().len() as u64).unwrap(); + + // Calculate the total drive count and register it as a metric. + let total_drive_count = IntCounter::new("drive_count", "Total count of drives in this pool or vdev").unwrap(); + for vdev in pool.vdevs().iter() { + total_drive_count.inc_by(vdev.disks().len() as u64); + } + pool_reg.register(Box::new(total_drive_count)).unwrap(); + + // Register pool health + registries.extend(register_health(labels.clone(), pool.health().clone()).unwrap()); + register_error_stats(&pool_reg, pool.error_statistics().clone()).unwrap(); + + // Run the zpool iostat command to get io stat information of all the pool, its vdevs and disks. + let mut cmd = Command::new("zpool"); + cmd.args(["iostat", "-Hpvy", pool.name().as_str(), "1", "1"]); + let output = cmd.output(); + let output = output.expect(&format!("Failure to execute `zpool iostat`")); + + // Check if the `zpool iostat` command executed successfully. + if !output.status.success() { + error!("Failed to execute `zpool iostat`!"); + error!("Full command: `{:?} {}`", cmd.get_program(), cmd.get_args() + .into_iter() + .map(|arg| arg.to_str().unwrap().to_string()) + .collect::>() + .join(" ")); + + error!("stdout:\n{:?}", output.stdout); + error!("stderr:\n{:?}", output.stderr); + error!("exit code: {}", output.status); + panic!("Failure to execute zpool iostat!"); + } + let output = String::from_utf8(output.stdout) + .expect(&format!("Failure to convert output of `zpool iostat` to utf8.")); + + let devices = Device::parse_from_stdout(output); + + // Get the pool from the devices and collect the io stats + if let Some(pool_dev) = devices.iter().find(|dev| dev.name == pool.name().clone()) { + pool_dev.io_stats.collect_metrics(&pool_reg).unwrap(); + + // Get the raw size of the pool. + let output = String::from_utf8( + Command::new("zpool") + .args(["list", pool.name().as_str(), "-Hp"]) + .output() + .expect(&format!("Failure to execute `zpool iostat {} -v 1 2`", pool.name())) + .stdout).expect(&format!("Failure to convert output of `zpool iostat {} -v 1 2` to utf8.", pool.name())); + + // Extract the size from the output + let cols: Vec<&str> = output.split("\t").collect(); + if cols.len() == 11 { + let size: u64 = cols[1].parse().unwrap(); + register_intcounter(&pool_reg, "raw_size", "The raw size of this device (this is not the usable space)", size).unwrap(); + } + } + + // Push pool metrics + registries.push(pool_reg); + + // The output of the zpool commands has vdevs listed before the disks in the vdev. + let mut last_vdev: Option<&Device> = None; + let mut last_vdev_data: Option<&Vdev> = None; + for device in devices.iter() { + // Skip any pools or vdevs + if device.name == pool.name().clone() { + // Skip pool + } else if device.is_pool_or_vdev() { + // Register the metrics of the last vdev before overwriting it. + if let Some(vdev) = last_vdev_data { + let reg = register_vdev_stats(vdev, device, device.name.clone(), labels.clone()).unwrap(); + + registries.push(reg); + } + + last_vdev = Some(device); // Store this device as the last vdev + last_vdev_data = None; + } else { // Register metrics for this disk + let mut labels = labels.clone(); + labels.insert(String::from("device_name"), device.name.clone()); + labels.insert(String::from("device_type"), String::from("disk")); + + // If vdev is set, add the vdev label for this disk. + if let Some(vdev) = last_vdev { + labels.insert(String::from("vdev"), vdev.name.clone()); + } + + // Create the device metric registry and collect io stats metrics + let device_reg = Registry::new_custom(Some("zfs".to_string()), Some(labels.clone())).unwrap(); + device.io_stats.collect_metrics(&device_reg).unwrap(); + + // Find the disk, and its vdev in the pool. After its found, register the disk's health and error stats. + for pool_vdev in pool.vdevs().iter() { + if let Some(pool_disk) = pool_vdev.disks().iter().find(|disk| String::from(disk.path().as_os_str().to_str().unwrap_or("")).contains(&device.name)) { + registries.extend(register_health(labels, pool_disk.health().clone()).unwrap()); + register_error_stats(&device_reg, pool_disk.error_statistics().clone()).unwrap(); + + last_vdev_data = Some(pool_vdev); + break; + } + } + + registries.push(device_reg); + } + } + + // Push the last vdev to the registry list + if let (Some(device), Some(vdev)) = (last_vdev, last_vdev_data) { + registries.push(register_vdev_stats(vdev, device, device.name.clone(), labels.clone()).unwrap()); + } + } + + // Construct the response string from all registeries. + let mut resp = String::new(); + for reg in registries.iter() { + resp.push_str(&encode_metrics(®).unwrap()); + resp.push_str("\n"); + } + + return resp; +} + +#[derive(Debug, PartialEq, Eq)] +struct IoStats { + capacity: Option, + available: Option, + + read_op: u64, + write_op: u64, + + read_band: u64, + write_band: u64, +} + +impl IoStats { + fn new(capacity: Option, available: Option, read_op: u64, write_op: u64, read_band: u64, write_band: u64) -> Self { + Self { + capacity, + available, + read_op, + write_op, + read_band, + write_band, + } + } + + fn collect_metrics(&self, reg: &Registry) -> prometheus::Result<()> { + if let (Some(capacity), Some(available)) = (self.capacity, self.available) { + register_intcounter(®, "capacity", "The capacity of the device in bytes", capacity)?; + register_intcounter(®, "available", "The available bytes in the device", available)?; + } + + register_intcounter(®, "read_operations", "The read operations for this device per second", self.read_op)?; + register_intcounter(®, "write_operations", "The write operations for this device per second", self.write_op)?; + register_intcounter(®, "read_bandwidth", "The read bandwidth for this device in bytes per second", self.read_band)?; + register_intcounter(®, "write_bandwidth", "The write bandwidth for this device in bytes per second", self.write_band)?; + + Ok(()) + } +} + +#[derive(Debug, PartialEq, Eq)] +struct Device { + name: String, + io_stats: IoStats, +} + +impl Device { + fn new(name: String, io_stats: IoStats) -> Self { + Self { + name, + io_stats + } + } + + fn is_pool_or_vdev(&self) -> bool { + self.io_stats.available.is_some() && self.io_stats.capacity.is_some() + } + + fn parse_from_stdout(stdout: String) -> Vec { + let mut input = stdout.as_str(); + + // Remove tailing \n + if input.ends_with("\n") { + input = &input[..input.len()]; + } + + let mut stats: Vec> = input.split("\n").collect::>().iter().map(|s| s.split("\t").collect::>()).collect(); + + // remove all rows that are not of length 7 or have empty columns. + stats.retain(|l| l.len() == 7 && l.iter().all(|&s| !s.is_empty())); + + let mut parsed = Vec::new(); + for row in stats.iter() { + let name = row[0]; + let alloc = row[1].parse().unwrap(); + let free = row[2].parse().unwrap(); + let read_op = row[3].parse().unwrap(); + let write_op = row[4].parse().unwrap(); + let read_band = row[5].parse().unwrap(); + let write_band = row[6].parse().unwrap(); + + // This is done since these fields can be Some(0), but alloc would never be unless + // its the device. free can be 0 if the pool is filled. + let (alloc, free) = if alloc == 0 { + (None, None) + } else { + (Some(alloc), Some(free)) + }; + + parsed.push(Device::new(String::from(name), + IoStats::new(alloc, free, read_op, write_op, read_band, write_band))); + } + + return parsed; + } +} + +/// ZFS metrics exporter for Prometheus! +#[derive(Parser, Debug)] +#[command(author, version, about, long_about = None)] +struct Args { + /// The address to bind and listen from. + #[arg(short, long, default_value_t = String::from("0.0.0.0"))] + bind_address: String, + + /// The port to listen on. + #[arg(short, long, default_value_t = 8080)] + port: u16, + + /// The lowest log level (off, error, warn, info, debug, or trace). + #[arg(long, default_value_t = String::from("info"))] + log_level: String, +} + +#[actix_web::main] +async fn main() -> std::io::Result<()> { + let args = Args::parse(); + + // Convert log level string to an enum + let log_level = args.log_level.to_lowercase(); + let log_level = match log_level.as_str() { + "off" => log::LevelFilter::Off, + "error" => log::LevelFilter::Error, + "warn" => log::LevelFilter::Warn, + "info" => log::LevelFilter::Info, + "debug" => log::LevelFilter::Debug, + "trace" => log::LevelFilter::Trace, + _ => panic!("Unknown log level! {}, expected off, error, warn, info, debug, or trace!", log_level), + }; + + // Create logger + fern::Dispatch::new() + .format(|out, message, record| { + out.finish(format_args!( + "{}[{}][{}] {}", + chrono::Local::now().format("[%Y-%m-%d][%H:%M:%S]"), + record.target(), + record.level(), + message + )) + }) + .level(log_level) + .chain(std::io::stdout()) + //.chain(fern::log_file("output.log")?) + .apply().expect("Failure to initialize fern logger!"); + + HttpServer::new(|| { + App::new() + .wrap(Logger::default()) + .service(metrics_endpoint) + }) + .bind((args.bind_address, args.port))? + .run() + .await +} \ No newline at end of file