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100d35b605c7e7d487382dd610c098f377405d33..f730ba65fd360b31d34ef97a21b8fb72f4d4dc80 100644 --- a/README.md +++ b/README.md @@ -1,37 +1,112 @@ # process-healer - -#### 介绍 +## 介绍 A high-performance daemon leveraging eBPF for reliable, low-overhead monitoring and automatic recovery of critical processes to ensure service continuity. -#### 软件架构 -软件架构说明 +## 软件架构 +Healer 是一个面向关键进程自愈场景的轻量守护进程，当前已实现的核心要点： + +1. 统一事件总线（broadcast）串联 “监控 → 恢复”。 +2. 可插拔监控插件（PID 文件 / 网络探测 / eBPF ）。 +3. 熔断与退避的恢复控制（ProcessHealer）。 +4. 守护进程模式运行，带信号管理（SIGHUP 热加载 / SIGTERM 优雅退出）与僵尸进程回收。 + + +``` ++------------------+ +main ------>+ daemonize parent |----> parent退出 / 子进程常驻 + +---------+--------+ + | + v + +-----------------------------+ + | Core Runtime (tokio runtime)| + +-----------------------------+ + init: load config -> init logger -> create event bus + | spawn monitors + | spawn healer subscriber + | enter signal loop (SIGHUP reload / SIGTERM shutdown) +``` + + +## 模块与职责概览 +核心模块按 “监控 → 恢复” 主链路与支撑层次划分（协调层尚未实现，后续加入）。 + +### 事件主链路 +- `monitor/*` (PID / Network / eBPF 退出事件)：采集进程或服务健康信号，发布事件（如 `ProcessDown`, `ProcessDisconnected`）到广播通道。 +- `subscriber/process_healer.rs`（ProcessHealer）：执行真正的重启 / 恢复动作；实现熔断控制（`retries` / `retry_window_secs` / `cooldown_secs`；状态 Closed → Open → HalfOpen），并输出日志。 + +### 配置与运行时 +- `config.rs` / `config_manager.rs`：加载、验证、热更新（SIGHUP）配置；定义监控与恢复策略结构体。 +- `core_logic.rs`：启动顺序（配置→日志→事件通道→监控→订阅者），托管 tokio runtime 主循环。 +- `service_manager.rs`：统一拉起 Healer 等长期任务（后续可扩展其他订阅者）。 +- `monitor_manager.rs`：按配置集管理 / 重建各监控实例。 +- `daemon_handler.rs`：守护进程化（fork + 父进程退出）。 +- `signal_handler.rs`：处理 `SIGHUP`（重载）、`SIGTERM` / `SIGINT`（优雅退出）、回收僵尸进程。 +- `logger.rs`：初始化 tracing/log 目录与等级（支持配置与 `RUST_LOG` 覆盖）。 +- `event_bus.rs`：定义 `ProcessEvent` 枚举与 broadcast 通道（monitors → healer）。 + +### 监控插件 (Monitors) +- `pid_monitor.rs`：根据 PID 文件轮询存活状态。 +- `network_monitor.rs`：网络连通 / 端口可达检测（输出断连事件）。 +- `ebpf_monitor.rs`：已实现的 eBPF 监控：加载内置 BPF 对象，附加 tracepoint `sched:sched_process_exit`，使用 perf ring buffer 读取 `ProcessExitEvent`，并通过 `PROCESS_NAMES_TO_MONITOR` 映射（截断进程名 -> 配置名）筛选关注的进程，向事件总线发送 `ProcessDown { pid, name }`。 + + +### 工具与辅助 +- `utils.rs`：通用帮助函数（路径、时间、权限等后续可放入）。 +- `tests/integration`：端到端场景验证（计划：依赖阻塞 → 延迟 → 释放；熔断路径；配置热加载）。 + + +### 事件流简述 +Monitors → broadcast → ProcessHealer（执行恢复 / 熔断）。 -#### 安装教程 +（依赖图 / 延迟恢复等“协调”能力尚未实现，未来若加入，将插入在 Monitors 与 Healer 之间。） -1. xxxx -2. xxxx -3. xxxx +--- +以上列表可随实现推进持续更新，保持 “新增模块 = 更新职责表” 的维护约定。 -#### 使用说明 +## 未来计划（未实现） +以下能力仍处于设计阶段，当前仓库不含对应代码，仅作为路线参考： +- 依赖关系自动发现与建模（系统d unit / 命令行启发式 / 配置融合）。 +- 延迟 / 条件性恢复（等待关键依赖 ready 后再放行重启）。 +- eBPF 深度扩展（在现有退出事件基础上继续增加退出原因、异常 syscall / 资源异常 统计等更细粒度信号）。 -1. xxxx -2. xxxx -3. xxxx -#### 参与贡献 -1. Fork 本仓库 -2. 新建 Feat_xxx 分支 -3. 提交代码 -4. 新建 Pull Request +## 配置文件使用指南 +配置文件在根目录下的`config.yaml` +配置文件采用了`serde`库进行解析。支持 PID eBPF Network 三种工作模式，具体的使用实例可以参考yaml中已有的样例。 +```YAML + - name: "simple_counter" #名字 用于日志 + enabled: true #启用开关 + command: "/home/lxq/ospp/simple_test_process/target/debug/simple_test_process" #恢复命令，在无pid文件时作为进程的主键来识别 + args: [] #恢复命令的参数 + run_as_root: false #进程是否已root进行恢复重启 + run_as_user: "lxq" #如果非root，则以某个用户的身份重启 + monitor: + type: "pid" # 使用 PID 文件进行监控 + pid_file_path: "/var/run/healer/simple_counter.pid" # pid监控模式应该有对应的pid文件 + interval_secs: 3 # 轮询间隔，单位秒 + # 恢复/重启策略配置 + recovery: + type: "regular" # 恢复策略，目前只有regular，regular默认实现了熔断，后续可以考虑分为两种恢复模式 + retries: 3 # 60秒内最多重试3次 + retry_window_secs: 60 + cooldown_secs: 180 # 如果发生熔断，冷却3分钟（180秒） +``` +配置文件支持热加载，可以给守护进程发送信号sigup来实现更新。 -#### 特技 +## 编译使用 +``` +RUST_LOG=info cargo run --config 'target."cfg(all())".runner="sudo -E"' +``` +用非root权限进行cargo build，并以root权限执行二进制 -1. 使用 Readme\_XXX.md 来支持不同的语言，例如 Readme\_en.md, Readme\_zh.md -2. Gitee 官方博客 [blog.gitee.com](https://blog.gitee.com) -3. 你可以 [https://gitee.com/explore](https://gitee.com/explore) 这个地址来了解 Gitee 上的优秀开源项目 -4. [GVP](https://gitee.com/gvp) 全称是 Gitee 最有价值开源项目，是综合评定出的优秀开源项目 -5. Gitee 官方提供的使用手册 [https://gitee.com/help](https://gitee.com/help) -6. Gitee 封面人物是一档用来展示 Gitee 会员风采的栏目 [https://gitee.com/gitee-stars/](https://gitee.com/gitee-stars/) +日志的位置可以由用户自己在 `config.yaml`中定义： +```YAML +# 全局配置 +log_level: "info" #日志输出等级，可以调整为debug/tracing发现更多信息，不过会被RUST_LOG环境变量覆盖 +log_directory: "/var/log/healer" #日志文件地址，本地址需要root权限，用户可以放在自己定义的位置下。 +pid_file_directory: "/var/run/healer" # healer 守护进程自己的 PID 文件目录，用户可以放在自己定义的位置下。 +working_directory: "/" #工作目录，默认是根目录 +``` diff --git a/config.yaml b/config.yaml new file mode 100644 index 0000000000000000000000000000000000000000..f3c93986a0fe464071784563d9370c0d63e700ba --- /dev/null +++ b/config.yaml @@ -0,0 +1,61 @@ +# healer/config.yaml + +# 全局配置 +log_level: "info" +log_directory: "/var/log/healer" +pid_file_directory: "/var/run/healer" # healer 守护进程自己的 PID 文件目录 +working_directory: "/" + +# 需要监控和自愈的进程列表 +processes: + + # - name: "simple_counter" + # enabled: true + # command: "/home/lxq/ospp/simple_test_process/target/debug/simple_test_process" + # args: [] + # run_as_root: false + # run_as_user: "lxq" + # monitor: + # type: "pid" # 使用 PID 文件进行监控 + + # pid_file_path: "/var/run/healer/simple_counter.pid" + + # interval_secs: 3 + + # # 恢复/重启策略配置 + # recovery: + # type: "regular" + # retries: 3 # 60秒内最多重试3次 + # retry_window_secs: 60 + # cooldown_secs: 180 # 如果发生熔断，冷却3分钟 + + # - name: "simple_test_process" + # enabled: true + # command: "/home/lxq/ospp/simple_test_process/target/debug/simple_test_process" + # args: [] + # run_as_root: false + # run_as_user: "lxq" + # monitor: + # type: "ebpf" + # recovery: + # type: "regular" + # retries: 3 # 60秒内最多重试3次 + # retry_window_secs: 60 + # cooldown_secs: 180 # 如果发生熔断，冷却3分钟 + + + - name: "simple_net_process" + enabled: true + command: "/home/lxq/anaconda3/bin/python" + args: ["/home/lxq/ospp/net-simple-test/main.py"] + run_as_root: false + run_as_user: "lxq" + monitor: + type: "network" + target_url: "http://127.0.0.1:8080/health" + interval_secs: 5 + recovery: + type: "regular" + retries: 3 # 60秒内最多重试3次 + retry_window_secs: 60 + cooldown_secs: 180 # 如果发生熔断，冷却3分钟 \ No newline at end of file diff --git a/healer-common/.gitignore b/healer-common/.gitignore new file mode 100644 index 0000000000000000000000000000000000000000..ea8c4bf7f35f6f77f75d92ad8ce8349f6e81ddba --- /dev/null +++ b/healer-common/.gitignore @@ -0,0 +1 @@ +/target diff --git a/healer-common/Cargo.toml b/healer-common/Cargo.toml new file mode 100644 index 0000000000000000000000000000000000000000..bb97b1c037e6a7182cedf752663fe204b4200daf --- /dev/null +++ b/healer-common/Cargo.toml @@ -0,0 +1,14 @@ +[package] +name = "healer-common" +version = "0.1.0" +edition = "2024" + +[features] +default = [] +user = ["aya"] + +[dependencies] +aya = { git = "https://github.com/aya-rs/aya", optional = true } + +[lib] +path = "src/lib.rs" diff --git a/healer-common/src/lib.rs b/healer-common/src/lib.rs new file mode 100644 index 0000000000000000000000000000000000000000..758d9ad378920021f4218f05bdebc9e6315130c0 --- /dev/null +++ b/healer-common/src/lib.rs @@ -0,0 +1,11 @@ +#![no_std] + +#[repr(C)] +#[derive(Clone, Copy)] +pub struct ProcessExitEvent { + pub pid: u32, + pub comm: [u8; 16], // 内核进程名，最多16字节（包括null终止符） +} + +#[cfg(feature = "user")] +unsafe impl aya::Pod for ProcessExitEvent {} diff --git a/healer-ebpf/.gitignore b/healer-ebpf/.gitignore new file mode 100644 index 0000000000000000000000000000000000000000..ea8c4bf7f35f6f77f75d92ad8ce8349f6e81ddba --- /dev/null +++ b/healer-ebpf/.gitignore @@ -0,0 +1 @@ +/target diff --git a/healer-ebpf/Cargo.toml b/healer-ebpf/Cargo.toml new file mode 100644 index 0000000000000000000000000000000000000000..498ba1c836a39697f9dde6b91907f073191926e8 --- /dev/null +++ b/healer-ebpf/Cargo.toml @@ -0,0 +1,17 @@ +[package] +name = "healer-ebpf" +version = "0.1.0" +edition = "2024" + +[dependencies] +aya-ebpf = { git = "https://github.com/aya-rs/aya" } +aya-log-ebpf = { git = "https://github.com/aya-rs/aya" } +healer-common = { path = "../healer-common" } + +[build-dependencies] +which = { version = "8.0.0", default-features = false, features = ["real-sys"] } + + +[[bin]] +name = "healer" +path = "src/main.rs" \ No newline at end of file diff --git a/healer-ebpf/build.rs b/healer-ebpf/build.rs new file mode 100644 index 0000000000000000000000000000000000000000..f83c317a1fb277f5a322fd2cb7372c4302ad443e --- /dev/null +++ b/healer-ebpf/build.rs @@ -0,0 +1,17 @@ +use which::which; + +/// Building this crate has an undeclared dependency on the `bpf-linker` binary. This would be +/// better expressed by [artifact-dependencies][bindeps] but issues such as +/// https://github.com/rust-lang/cargo/issues/12385 make their use impractical for the time being. +/// +/// This file implements an imperfect solution: it causes cargo to rebuild the crate whenever the +/// mtime of `which bpf-linker` changes. Note that possibility that a new bpf-linker is added to +/// $PATH ahead of the one used as the cache key still exists. Solving this in the general case +/// would require rebuild-if-changed-env=PATH *and* rebuild-if-changed={every-directory-in-PATH} +/// which would likely mean far too much cache invalidation. +/// +/// [bindeps]: https://doc.rust-lang.org/nightly/cargo/reference/unstable.html?highlight=feature#artifact-dependencies +fn main() { + let bpf_linker = which("bpf-linker").unwrap(); + println!("cargo:rerun-if-changed={}", bpf_linker.to_str().unwrap()); +} diff --git a/healer-ebpf/src/main.rs b/healer-ebpf/src/main.rs new file mode 100644 index 0000000000000000000000000000000000000000..ef06ee7e9452b1b48127f270224b7a513d223dcc --- /dev/null +++ b/healer-ebpf/src/main.rs @@ -0,0 +1,57 @@ +#![no_std] +#![no_main] + +use aya_ebpf::{ + EbpfContext, + macros::{map, tracepoint}, + maps::{HashMap, PerfEventArray}, + programs::TracePointContext, +}; +use aya_log_ebpf::info; +use healer_common::ProcessExitEvent; + +// 存储要监控的进程名（截断到15个字符） +#[map] +static PROCESS_NAMES_TO_MONITOR: HashMap<[u8; 16], u8> = HashMap::with_max_entries(1024, 0); + +#[map] +static EVENTS: PerfEventArray = PerfEventArray::new(0); + +#[tracepoint] +pub fn healer_exit(ctx: TracePointContext) -> u32 { + match try_healer_exit(ctx) { + Ok(ret) => ret, + Err(ret) => ret, + } +} + +fn try_healer_exit(ctx: TracePointContext) -> Result { + let pid = ctx.pid(); + let tgid = ctx.tgid(); + + if pid != tgid { + return Ok(0); + } + + let comm = match aya_ebpf::helpers::bpf_get_current_comm() { + Ok(comm_array) => comm_array, + Err(_) => return Ok(0), + }; + + // 检查这个进程名是否在监控列表中 + if unsafe { PROCESS_NAMES_TO_MONITOR.get(&comm) }.is_some() { + info!(&ctx, "Monitored process detected"); + + // 发送包含进程名的事件 + let event = ProcessExitEvent { pid, comm }; + EVENTS.output(&ctx, &event, 0); + } + + Ok(0) +} + +#[cfg(not(test))] +#[panic_handler] +fn panic(_info: &core::panic::PanicInfo) -> ! { + loop {} +} diff --git a/healer/Cargo.lock b/healer/Cargo.lock new file mode 100644 index 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["derive"] } +serde_yaml = "0.9" +chrono = "0.4" +tracing = "0.1" +async-trait = "0.1" +tracing-subscriber = { version = "0.3", features = ["fmt", "env-filter", "json", "time"] } +tracing-appender = "0.2" +nix = { version = "0.29.0", features = ["signal", "process"] } +users = "0.11.0" +bytes = "1.10.1" +futures = "0.3.31" +sysinfo = "0.36.0" +env_logger = "0.11.8" + + +[build-dependencies] +aya-build = { git = "https://github.com/aya-rs/aya" } +anyhow = "1" +healer-ebpf = { path = "../healer-ebpf" } + +[[bin]] +name = "healer" +path = "src/main.rs" diff --git a/healer/build.rs b/healer/build.rs new file mode 100644 index 0000000000000000000000000000000000000000..666f802bb67ec9992ab20d189e3eeea66d36fb00 --- /dev/null +++ b/healer/build.rs @@ -0,0 +1,14 @@ +use anyhow::{Context as _, anyhow}; +use aya_build::{Toolchain, cargo_metadata}; + +fn main() -> anyhow::Result<()> { + let cargo_metadata::Metadata { packages, .. } = cargo_metadata::MetadataCommand::new() + .no_deps() + .exec() + .context("MetadataCommand::exec")?; + let ebpf_package = packages + .into_iter() + .find(|cargo_metadata::Package { name, .. }| name.as_str() == "healer-ebpf") + .ok_or_else(|| anyhow!("healer-ebpf package not found"))?; + aya_build::build_ebpf([ebpf_package], Toolchain::default()) +} diff --git a/healer/src/config.rs b/healer/src/config.rs new file mode 100644 index 0000000000000000000000000000000000000000..7aa0505950459e6310cc58506004cddda20e4aa5 --- /dev/null +++ b/healer/src/config.rs @@ -0,0 +1,182 @@ +use crate::daemon_handler::DaemonConfig; +use crate::monitor::ebpf_monitor; +use nix::libc::SKF_NET_OFF; +use serde::Deserialize; +use std::fs; +use std::ops::Not; +use std::path::{Path, PathBuf}; + +// 顶层配置结构体 + +#[derive(Debug, Clone, Deserialize)] +pub struct AppConfig { + pub log_level: Option, + pub log_directory: Option, + pub pid_file_directory: Option, + pub processes: Vec, + pub working_directory: Option, +} + +#[derive(Deserialize, Debug, Clone)] +pub struct ProcessConfig { + pub name: String, + pub enabled: bool, + pub command: String, + pub args: Vec, + pub run_as_user: Option, + pub run_as_root: bool, + #[serde(default)] + pub working_dir: Option, + pub monitor: MonitorConfig, + #[serde(default)] + pub recovery: RecoveryConfig, +} + +#[derive(Deserialize, Debug, Clone)] +#[serde(tag = "type", rename_all = "lowercase")] +pub enum MonitorConfig { + Pid(PidMonitorFields), + Ebpf(EbpfMonitorFields), + Network(NetworkMonitorFields), +} + +#[derive(Deserialize, Debug, Clone)] +pub struct PidMonitorFields { + pub pid_file_path: PathBuf, + pub interval_secs: u64, +} + +#[derive(Deserialize, Debug, Clone)] +pub struct NetworkMonitorFields { + pub target_url: String, + pub interval_secs: u64, +} +#[derive(Deserialize, Debug, Clone)] +pub struct EbpfMonitorFields {} + +// #[derive(Deserialize, Debug, Clone)] +// pub struct RecoveryConfig { +// pub retries: u32, +// pub retry_window_secs: u64, +// pub cooldown_secs: u64, +// } + +#[derive(Deserialize, Debug, Clone)] +#[serde(tag = "type", rename_all = "lowercase")] +pub enum RecoveryConfig { + Regular(RegularHealerFields), + NotRegular(NotREgularHealerFields), +} + +#[derive(Deserialize, Debug, Clone)] +pub struct RegularHealerFields { + pub retries: u32, + pub retry_window_secs: u64, + pub cooldown_secs: u64, +} +// 占位以后没有也可以删掉 +#[derive(Deserialize, Debug, Clone)] +pub struct NotREgularHealerFields {} + +#[derive(Debug, Clone)] +pub struct PidMonitorConfig { + pub name: String, + pub pid_file_path: PathBuf, + pub interval_secs: u64, +} +#[derive(Debug, Clone)] +pub struct EbpfMonitorConfig { + pub name: String, + pub command: String, +} +#[derive(Debug, Clone)] +pub struct NetworkMonitorConfig { + pub name: String, + // pub pid_file_path: PathBuf, + pub target_url: String, // 目标URL + pub interval_secs: u64, //检查的频率间隔 +} +impl Default for RecoveryConfig { + fn default() -> Self { + Self::Regular(RegularHealerFields::default()) + } +} +impl Default for RegularHealerFields { + fn default() -> Self { + Self { + retries: 3, + retry_window_secs: 60, + cooldown_secs: 180, + } + } +} +impl ProcessConfig { + pub fn get_pid_monitor_config(&self) -> Option { + if let MonitorConfig::Pid(pid_fields) = &self.monitor { + Some(PidMonitorConfig { + name: self.name.clone(), + pid_file_path: pid_fields.pid_file_path.clone(), + interval_secs: pid_fields.interval_secs, + }) + } else { + None + } + } + + pub fn get_ebpf_monitor_config(&self) -> Option { + if let MonitorConfig::Ebpf(ebpf_fields) = &self.monitor { + Some(EbpfMonitorConfig { + name: self.name.clone(), + command: self.command.clone(), + }) + } else { + None + } + } + + pub fn get_network_monitor_config(&self) -> Option { + if let MonitorConfig::Network(net_fields) = &self.monitor { + Some(NetworkMonitorConfig { + name: self.name.clone(), + target_url: net_fields.target_url.clone(), + interval_secs: net_fields.interval_secs, + }) + } else { + None + } + } +} + +impl AppConfig { + pub fn load_from_file(config_file_path: &Path) -> Result> { + let config_content = fs::read_to_string(config_file_path)?; + let loaded_config: AppConfig = serde_yaml::from_str(&config_content)?; + Ok(loaded_config) + } + + pub fn get_process_config_for(&self, process_name: &str) -> Option<&ProcessConfig> { + self.processes + .iter() + .find(|&p| p.name == process_name) + .map(|p_config| p_config) + } + + pub fn to_daemonize_config(&self) -> DaemonConfig { + let daemon_config = DaemonConfig { + pid_file: self + .pid_file_directory + .as_ref() + .map(|pid_file| pid_file.join("healer.pid")) + .unwrap_or_else(|| PathBuf::from("/tmp/healer.pid")), + log_directory: self + .log_directory + .clone() + .unwrap_or_else(|| PathBuf::from("/tmp/healer")), + working_dir: self + .working_directory + .clone() + .unwrap_or_else(|| PathBuf::from("/")), + }; + daemon_config + } +} diff --git a/healer/src/config_manager.rs b/healer/src/config_manager.rs new file mode 100644 index 0000000000000000000000000000000000000000..136cb3cd855d75d1af281f7d98fcb5141f044728 --- /dev/null +++ b/healer/src/config_manager.rs @@ -0,0 +1,46 @@ +use crate::config::AppConfig; +use anyhow::Result; +use std::sync::Arc; +use tokio::sync::RwLock; +use tracing::{error, info}; + +// 配置管理器，负责配置的加载和热更新 +pub struct ConfigManager { + config: Arc>, + config_path: std::path::PathBuf, +} + +impl ConfigManager { + pub fn new(config: Arc>, config_path: std::path::PathBuf) -> Self { + Self { + config, + config_path, + } + } + + // 重新加载配置文件 + pub async fn reload_config(&self) -> Result<()> { + info!( + "ConfigManager: Reloading configuration from {:?}", + self.config_path + ); + + match AppConfig::load_from_file(&self.config_path) { + Ok(new_config) => { + let mut config_guard = self.config.write().await; + *config_guard = new_config; + info!("ConfigManager: Configuration reloaded successfully."); + Ok(()) + } + Err(e) => { + error!("ConfigManager: Failed to reload configuration: {}", e); + Err(anyhow::anyhow!("Failed to reload configuration: {}", e)) + } + } + } + + // 获取当前配置的只读引用 + pub fn get_config(&self) -> Arc> { + Arc::clone(&self.config) + } +} diff --git a/healer/src/core_logic.rs b/healer/src/core_logic.rs new file mode 100644 index 0000000000000000000000000000000000000000..aac45accc1103ebacdd7f277cc01afbe193dccb7 --- /dev/null +++ b/healer/src/core_logic.rs @@ -0,0 +1,112 @@ +use crate::{ + config::AppConfig, + config_manager::ConfigManager, + event_bus, + monitor_manager::MonitorManager, + service_manager::ServiceManager, + signal_handler::{SignalEvent, SignalHandler}, +}; +use anyhow::Result; +use std::{path::PathBuf, sync::Arc}; +use tokio::sync::RwLock; +use tracing::{debug, error, info}; + +pub fn async_runtime(app_config: Arc>, config_path: PathBuf) { + println!("Async runtime: Starting process monitoring"); + + let rt = match tokio::runtime::Builder::new_multi_thread() + .enable_all() + .worker_threads(4) + .thread_name("healer") + .build() + { + Ok(r) => r, + Err(e) => { + eprintln!("Async runtime: Error from {}", e); + std::process::exit(1); + } + }; + + rt.block_on(async { + if let Err(e) = daemon_core_logic(app_config, config_path).await { + error!("Core logic error: {}", e); + std::process::exit(1); + } + }); +} + +async fn daemon_core_logic(config: Arc>, config_path: PathBuf) -> Result<()> { + info!("Application Core Logic: Starting up and initializing components..."); + + // 1. 创建事件总线 + let event_sender = event_bus::create_event_sender(); + info!("Application Core Logic: Event bus created."); + + // 2. 初始化各个管理器，包括配置管理器喝监视器管理器 + let config_manager = ConfigManager::new(Arc::clone(&config), config_path); + let mut monitor_manager = MonitorManager::new(event_sender.clone()).await?; + + // 3. 启动持久性后台服务 + ServiceManager::spawn_persistent_services(&event_sender, &config); + info!("Application Core Logic: Persistent services started."); + + // 4. 进行初始配置协调 + { + let config_guard = config.read().await; + debug!( + "Loaded {} process configurations:", + config_guard.processes.len() + ); + for (i, process_config) in config_guard.processes.iter().enumerate() { + debug!( + "Process {}: name='{}', command='{}'", + i + 1, + process_config.name, + process_config.command + ); + if let Some(ebpf_config) = process_config.get_ebpf_monitor_config() { + let executable_name = crate::utils::extract_executable_name(&ebpf_config.command); + let truncated_name = crate::utils::truncate_process_name(&executable_name); + debug!( + " eBPF monitoring enabled: executable='{}', truncated='{}'", + executable_name, truncated_name + ); + } + } + monitor_manager.reconcile(&config_guard.processes).await?; + } + info!("Application Core Logic: Initial reconciliation completed."); + + // 5. 主事件循环 - 等待信号并处理 + loop { + match SignalHandler::wait_for_signal().await? { + SignalEvent::ConfigReload => { + info!("Core Logic: Processing configuration reload..."); + + // 重新加载配置 + if let Err(e) = config_manager.reload_config().await { + error!("Core Logic: Failed to reload config: {}", e); + continue; + } + + // 重新协调监控器 + let config_guard = config.read().await; + if let Err(e) = monitor_manager.reconcile(&config_guard.processes).await { + error!("Core Logic: Failed to reconcile monitors: {}", e); + } + } + SignalEvent::Shutdown => { + info!("Core Logic: Initiating graceful shutdown..."); + break; + } + } + } + + // 6. 关闭 + monitor_manager.shutdown().await; + info!("Application Core Logic: Shutdown completed."); + + // 7. 确保进程正确退出 + info!("Application Core Logic: Exiting process..."); + std::process::exit(0); +} diff --git a/healer/src/daemon_handler.rs b/healer/src/daemon_handler.rs new file mode 100644 index 0000000000000000000000000000000000000000..efa7d4a100580fbe711a82a4a62c6898c5380241 --- /dev/null +++ b/healer/src/daemon_handler.rs @@ -0,0 +1,88 @@ +use crate::config::AppConfig; +use crate::logger; +use daemonize::Daemonize; +use std::path::PathBuf; + +#[derive(Debug)] +pub enum DaemonError { + Io(std::io::Error), + Daemonize(daemonize::Error), +} +impl From for DaemonError { + fn from(err: std::io::Error) -> DaemonError { + DaemonError::Io(err) + } +} +impl From for DaemonError { + fn from(err: daemonize::Error) -> DaemonError { + DaemonError::Daemonize(err) + } +} + +#[derive(Clone, Debug)] +pub struct DaemonConfig { + pub pid_file: PathBuf, + pub log_directory: PathBuf, + pub working_dir: PathBuf, +} +impl Default for DaemonConfig { + fn default() -> Self { + DaemonConfig { + pid_file: PathBuf::from("/tmp/healer.pid"), + log_directory: PathBuf::from("/tmp/healer"), + working_dir: PathBuf::from("/"), + } + } +} + +pub fn run_as_daemon( + config: std::sync::Arc>, + core_logic_fn: F, +) -> Result<(), DaemonError> +where + F: FnOnce() + Send + 'static, +{ + let config_guard = config.blocking_read(); + let daemon_config = config_guard.to_daemonize_config(); + + println!("Starting the daemon process"); + println!("PID file: {:?}", daemon_config.pid_file); + println!( + "Healer-Process Log Directory: {:?}", + daemon_config.log_directory + ); + let daemonizer = Daemonize::new() + .pid_file(&daemon_config.pid_file) + .chown_pid_file(false) + .working_directory(&daemon_config.working_dir) + .umask(0o027) + .privileged_action(|| { + //Todo + println!("Child process: Successfully set the hook fn."); + }); + match daemonizer.start() { + Ok(_) => { + let log_file_path = &daemon_config.log_directory; + let log_guard = match logger::init_daemon_logging(log_file_path) { + Ok(guard) => guard, + Err(e) => { + tracing::error!("Failed to initialize logging: {}. Exiting.", e); + std::process::exit(1); + } + }; + + // 执行核心逻辑 + core_logic_fn(); + + // 在进程退出前，显式地等待日志系统完成 + std::mem::drop(log_guard); + std::thread::sleep(std::time::Duration::from_millis(100)); + + Ok(()) + } + Err(e) => { + eprintln!("Parents process: Failed to begin the daemon process: {}", e); + Err(DaemonError::Daemonize(e)) + } + } +} diff --git a/healer/src/event_bus.rs b/healer/src/event_bus.rs new file mode 100644 index 0000000000000000000000000000000000000000..f0460fa9f097724c391f234e7ec975b9c6e772b0 --- /dev/null +++ b/healer/src/event_bus.rs @@ -0,0 +1,21 @@ +use crate::config::ProcessConfig; +use std::path::PathBuf; +use tokio::sync::broadcast; + +const CHANNEL_CAPACITY: usize = 128; + +#[derive(Clone, Debug)] +pub enum ProcessEvent { + ProcessDown { name: String, pid: u32 }, + ProcessDisconnected { name: String, url: String }, +} +pub struct RestartProcessConfig { + pub name: String, + pub command: String, + pub args: Vec, + pub workding_dir: Option, +} +pub fn create_event_sender() -> broadcast::Sender { + let (tx, _rx_initial) = broadcast::channel(CHANNEL_CAPACITY); + tx +} diff --git a/healer/src/logger.rs b/healer/src/logger.rs new file mode 100644 index 0000000000000000000000000000000000000000..f867cd4b492b8334f2e0c053c2b124469749f855 --- /dev/null +++ b/healer/src/logger.rs @@ -0,0 +1,31 @@ +use std::path::Path; +use tracing_appender::non_blocking::WorkerGuard; +use tracing_subscriber::EnvFilter; + +pub fn init_daemon_logging( + log_directory: &Path, +) -> Result> { + let log_file_name_prefix = "healer.log"; + + let file_appender = tracing_appender::rolling::daily(log_directory, log_file_name_prefix); + let (non_blocking_writer, guard) = tracing_appender::non_blocking(file_appender); + + let env_filter_str = std::env::var("RUST_LOG").unwrap_or_else(|_| "info".to_string()); + let env_filter = EnvFilter::try_new(&env_filter_str) + .map_err(|e| format!("Failed to parse RUST_LOG value '{}': {}", env_filter_str, e))?; + + tracing_subscriber::fmt() + .with_env_filter(env_filter) + .with_writer(non_blocking_writer) + .with_ansi(false) + .try_init() // try_init() 返回 Result, init() 会 panic on error + .map_err(|e| format!("Failed to initialize tracing subscriber: {}", e))?; + + tracing::info!( + "Logging system initialized. Log directory: {}", + log_directory.display() + ); + tracing::info!("Log level configured via RUST_LOG='{}'", env_filter_str); + + Ok(guard) +} diff --git a/healer/src/main.rs b/healer/src/main.rs new file mode 100644 index 0000000000000000000000000000000000000000..e47ce2457ce0a40d9c7d41a76ec314df336cbab4 --- /dev/null +++ b/healer/src/main.rs @@ -0,0 +1,46 @@ +mod config; +mod config_manager; +mod core_logic; +mod daemon_handler; +mod event_bus; +mod logger; +mod monitor; +mod monitor_manager; +mod service_manager; +mod signal_handler; +mod subscriber; +mod utils; +use config::AppConfig; +use daemon_handler::run_as_daemon; +use tokio::sync::RwLock; + +fn main() { + println!("Attempting to load the config"); + + // let config_file_path = Path::new("config.yaml"); + let config_file_path_str = "config.yaml"; + let absolue_config_path = match std::fs::canonicalize(config_file_path_str) { + Ok(path) => path, + Err(e) => { + eprintln!( + "Error: No such file or directory about configure '{}': {}", + config_file_path_str, e + ); + std::process::exit(1); + } + }; + let initial_config = AppConfig::load_from_file(&absolue_config_path).expect("初始配置加载失败"); + let shared_config = std::sync::Arc::new(RwLock::new(initial_config)); + let config_for_closure = std::sync::Arc::clone(&shared_config); + let path_for_closure = absolue_config_path.clone(); + let core_logic_closure = + move || core_logic::async_runtime(config_for_closure, path_for_closure); + match run_as_daemon(shared_config, core_logic_closure) { + Ok(_) => { + println!("Main program: Core logic quit"); + } + Err(e) => { + println!("Main program: Core logic error with {:?}", e); + } + } +} diff --git a/healer/src/monitor.rs b/healer/src/monitor.rs new file mode 100644 index 0000000000000000000000000000000000000000..570ef1f7c5346fe851cdc7d27c9c460a8428662c --- /dev/null +++ b/healer/src/monitor.rs @@ -0,0 +1,15 @@ +use async_trait::async_trait; +pub mod ebpf_monitor; +pub mod network_monitor; +pub mod pid_monitor; +use sysinfo::{RefreshKind, System}; +#[async_trait] +pub trait Monitor: Send + Sync { + // 启动并运行监控任务。 + // 这个方法需要包含一个无限循环，因此它本身不会返回。 + // 它应该被作为一个独立的并发任务来 spawn。 + // 但是目前eBPF不需要run。后续考虑重新抽象Monitor trait (Todo) + async fn run(self); + + fn name(&self) -> String; +} diff --git a/healer/src/monitor/ebpf_monitor.rs b/healer/src/monitor/ebpf_monitor.rs new file mode 100644 index 0000000000000000000000000000000000000000..93c4efc51fd809e0accbb557f0dddff358f60a92 --- /dev/null +++ b/healer/src/monitor/ebpf_monitor.rs @@ -0,0 +1,359 @@ +use super::Monitor; +use crate::{config::EbpfMonitorConfig, event_bus::ProcessEvent, utils}; +use anyhow::Result; +use anyhow::anyhow; +use async_trait::async_trait; +use aya::{Ebpf, maps::PerfEventArray, programs::TracePoint, util::online_cpus}; +use bytes::BytesMut; +use healer_common::ProcessExitEvent; +use std::time::Duration; +use std::{ + collections, + sync::{Arc, Mutex}, +}; +use std::{ + os::unix::io::AsRawFd, + sync::atomic::{AtomicBool, Ordering}, +}; +use tokio::{io::unix::AsyncFd, sync::broadcast, time::timeout}; +use tracing::{debug, error, info, warn}; + +pub struct EbpfMonitor { + bpf: Arc>, + process_name_mapping: Arc>>, // truncated_name -> full_config_name + task_handles: Vec>, // 保存后台任务句柄 + shutdown_flag: Arc, // 关闭标志 +} + +impl EbpfMonitor { + pub async fn new(event_tx: broadcast::Sender) -> Result { + info!("[EbpfMonitor] Initializing and launching the global eBPF monitor..."); + + let mut bpf = aya::Ebpf::load(aya::include_bytes_aligned!(concat!( + env!("OUT_DIR"), + "/healer" + )))?; + let program: &mut TracePoint = bpf + .program_mut("healer_exit") + .ok_or_else(|| anyhow!("Program 'healer_exit' not found"))? + .try_into()?; + program.load()?; + program.attach("sched", "sched_process_exit")?; + info!("[EbpfMonitor] Tracepoint attached successfully."); + + let events_map = bpf + .take_map("EVENTS") + .ok_or_else(|| anyhow!("Failed to take ownership of 'EVENTS' map"))?; + let mut events = PerfEventArray::try_from(events_map)?; + let mut task_handles = Vec::new(); + let shutdown_flag = Arc::new(AtomicBool::new(false)); + + // 创建进程名映射的共享引用 + let process_name_mapping = Arc::new(Mutex::new(collections::HashMap::new())); + for cpu_id in online_cpus().unwrap() { + let perf_buf = events.open(cpu_id, None)?; + let tx_clone = event_tx.clone(); + let fd = perf_buf.as_raw_fd(); + let async_fd = AsyncFd::new(fd)?; + let shutdown_flag_clone = shutdown_flag.clone(); + let mapping_clone = Arc::clone(&process_name_mapping); + + let handle = tokio::spawn(async move { + info!("[Worker] Listener task for CPU {} started.", cpu_id); + let mut local_perf_buf = perf_buf; + + while !shutdown_flag_clone.load(Ordering::SeqCst) { + let readable_result = + timeout(Duration::from_secs(1), async_fd.readable()).await; + match readable_result { + Ok(Ok(mut guard)) => { + // 确保在作用域结束时清理可读状态 + let mut should_break = false; + let mut bufs: [BytesMut; 1] = [BytesMut::with_capacity(1024)]; + match local_perf_buf.read_events(&mut bufs) { + Ok(events_read) => { + if events_read.read > 0 { + for buf in bufs.iter().take(events_read.read) { + let event = unsafe { + (buf.as_ptr() as *const ProcessExitEvent) + .read_unaligned() + }; + + let comm_str = std::str::from_utf8( + &event.comm[..event + .comm + .iter() + .position(|&x| x == 0) + .unwrap_or(16)], + ) + .unwrap_or("unknown"); + let process_name = { + let mapping = mapping_clone.lock().unwrap(); + mapping + .get(comm_str) + .cloned() + .unwrap_or_else(|| comm_str.to_string()) + }; + + info!( + "(CPU {}) Received Event: PID {} (comm: {}) has exited.", + cpu_id, event.pid, comm_str + ); + let send_result = + tx_clone.send(ProcessEvent::ProcessDown { + name: process_name.clone(), + pid: event.pid, + }); + + match send_result { + Ok(_) => { + debug!( + "(CPU {}) Sent ProcessDown event for '{}'", + cpu_id, process_name + ); + } + Err(e) => { + warn!( + "(CPU {}) Failed to send event: {} - continuing", + cpu_id, e + ); + } + } + } + } + } + Err(e) => { + debug!( + "[Worker] Perf buffer read error on CPU {}: {}, continuing", + cpu_id, e + ); + let error_str = e.to_string(); + if error_str.contains("broken pipe") + || error_str.contains("connection") + { + warn!( + "[Worker] Perf buffer connection issue on CPU {}, exiting", + cpu_id + ); + should_break = true; + } + } + } + // 明确清理可读状态 + guard.clear_ready(); + if should_break { + break; + } + } + Ok(Err(e)) => { + warn!( + "[Worker] AsyncFd error on CPU {}: {}, continuing", + cpu_id, e + ); + tokio::time::sleep(Duration::from_millis(100)).await; + } + Err(_) => { + // 超时是预料之中的，会继续进行shutdown_falg_clone的检查。用于在外界关闭本守护进程可以在1s内响应 + continue; + } + } + } + info!("[Worker] Listener task for CPU {} shutting down.", cpu_id); + }); + task_handles.push(handle); + } + + info!( + "[EbpfMonitor] All {} worker tasks have been dispatched.", + task_handles.len() + ); + + Ok(Self { + bpf: Arc::new(Mutex::new(bpf)), + process_name_mapping, + task_handles, + shutdown_flag, + }) + } + pub async fn wait_and_publish(&mut self) {} + pub async fn watch_config(&mut self, ebpf_config: EbpfMonitorConfig) -> anyhow::Result<()> { + // 从命令路径中提取可执行文件名 + let executable_name = utils::extract_executable_name(&ebpf_config.command); + let truncated_name = utils::truncate_process_name(&executable_name); + + info!( + "[EbpfMonitor] Adding process '{}' (truncated: '{}') to watch list.", + executable_name, truncated_name + ); + + // 更新进程名映射 + let mut mapping = self.process_name_mapping.lock().unwrap(); + mapping.insert(truncated_name.clone(), ebpf_config.name.clone()); + drop(mapping); + + // 将进程名添加到 eBPF map 中 + let mut process_name_bytes = [0u8; 16]; + let truncated_bytes = truncated_name.as_bytes(); + let copy_len = truncated_bytes.len().min(15); // 保留一个字节作为null终止符 + process_name_bytes[..copy_len].copy_from_slice(&truncated_bytes[..copy_len]); + + let bpf_clone = Arc::clone(&self.bpf); + let insert_result = tokio::task::spawn_blocking(move || -> anyhow::Result<()> { + let mut bpf_guard = bpf_clone + .lock() + .map_err(|e| anyhow!("Mutex was poisoned: {}", e))?; + + let map_handle = bpf_guard + .map_mut("PROCESS_NAMES_TO_MONITOR") + .ok_or_else(|| anyhow!("eBPF map 'PROCESS_NAMES_TO_MONITOR' not found"))?; + + let mut names_map: aya::maps::HashMap<_, [u8; 16], u8> = + aya::maps::HashMap::try_from(map_handle) + .map_err(|e| anyhow!("Failed to create HashMap view from eBPF map: {}", e))?; + + names_map.insert(process_name_bytes, 1, 0).map_err(|e| { + anyhow!( + "Failed to insert process name {:?} into eBPF map: {}", + process_name_bytes, + e + ) + })?; + + Ok(()) + }) + .await; + + match insert_result { + Ok(inner_result) => match inner_result { + Ok(()) => { + info!( + "Successfully added process name '{}' to eBPF monitoring.", + truncated_name + ); + Ok(()) + } + Err(e) => { + error!(error = ?e, process_name = %truncated_name, "Task to update eBPF map failed."); + Err(e) + } + }, + Err(e) => { + error!(error = ?e, "The spawned blocking task itself failed."); + Err(e.into()) + } + } + } + + pub async fn unwatch_config(&mut self, ebpf_config: EbpfMonitorConfig) -> anyhow::Result<()> { + let executable_name = utils::extract_executable_name(&ebpf_config.command); + let truncated_name = utils::truncate_process_name(&executable_name); + + info!( + "[EbpfMonitor] Removing process '{}' (truncated: '{}') from watch list.", + executable_name, truncated_name + ); + + // 移除内部状态 + let mut mapping = self.process_name_mapping.lock().unwrap(); + mapping.remove(&truncated_name); + drop(mapping); + + // 从 eBPF map 中移除进程名 + let mut process_name_bytes = [0u8; 16]; + let truncated_bytes = truncated_name.as_bytes(); + let copy_len = truncated_bytes.len().min(15); // 保留一个字节作为null终止符 + process_name_bytes[..copy_len].copy_from_slice(&truncated_bytes[..copy_len]); + + let bpf_clone = Arc::clone(&self.bpf); + let remove_result = tokio::task::spawn_blocking(move || -> anyhow::Result<()> { + let mut bpf_guard = bpf_clone + .lock() + .map_err(|e| anyhow!("Mutex was poisoned: {}", e))?; + + let map_handle = bpf_guard + .map_mut("PROCESS_NAMES_TO_MONITOR") + .ok_or_else(|| anyhow!("eBPF map 'PROCESS_NAMES_TO_MONITOR' not found"))?; + + let mut names_map: aya::maps::HashMap<_, [u8; 16], u8> = + aya::maps::HashMap::try_from(map_handle) + .map_err(|e| anyhow!("Failed to create HashMap view from eBPF map: {}", e))?; + + names_map.remove(&process_name_bytes).map_err(|e| { + anyhow!( + "Failed to remove process name {:?} from eBPF map: {}", + process_name_bytes, + e + ) + })?; + + Ok(()) + }) + .await; + + match remove_result { + Ok(inner_result) => match inner_result { + Ok(()) => { + info!( + "Successfully removed process name '{}' from eBPF monitoring.", + truncated_name + ); + Ok(()) + } + Err(e) => { + error!(error = ?e, process_name = %truncated_name, "Task to remove from eBPF map failed."); + Err(e) + } + }, + Err(e) => { + error!(error = ?e, "The spawned blocking task itself failed."); + Err(e.into()) + } + } + } + // 关闭 eBPF 监控器 + pub async fn shutdown(&mut self) { + info!("[EbpfMonitor] Initiating shutdown..."); + + // 设置关闭标志，使循环内的定期超时检查可以关闭对应线程 + self.shutdown_flag.store(true, Ordering::SeqCst); + + // 等待所有任务完成，设置超时 + let mut completed_tasks = 0; + for handle in self.task_handles.drain(..) { + match tokio::time::timeout(Duration::from_secs(3), handle).await { + Ok(_) => { + completed_tasks += 1; + } + Err(_) => { + warn!("[EbpfMonitor] Task did not complete within timeout, force stopping."); + } + } + } + + info!( + "[EbpfMonitor] Shutdown completed. {} tasks stopped gracefully.", + completed_tasks + ); + } +} + +impl Drop for EbpfMonitor { + fn drop(&mut self) { + // 设置关闭标志，即使 shutdown 没有被调用 + self.shutdown_flag.store(true, Ordering::SeqCst); + info!("[EbpfMonitor] Monitor dropped, shutdown flag set."); + } +} +#[async_trait] +impl Monitor for EbpfMonitor { + // eBPF的monitor的run方法是空的，不应该被调用 + // eBPF的执行逻辑应该是在new创建函数里就进行了 + async fn run(mut self) { + self.wait_and_publish().await; + } + // 监控器的名字或标识 + fn name(&self) -> String { + // self.config.name.clone() + "EbpfMonitor".to_string() + } +} diff --git a/healer/src/monitor/network_monitor.rs b/healer/src/monitor/network_monitor.rs new file mode 100644 index 0000000000000000000000000000000000000000..688572ab898e7d0dc2a93e099c902e9a9252cad3 --- /dev/null +++ b/healer/src/monitor/network_monitor.rs @@ -0,0 +1,103 @@ +use crate::{ + config::{self, NetworkMonitorConfig}, + event_bus::ProcessEvent, + monitor::Monitor, +}; +use async_trait::async_trait; +use reqwest::Response; +use std::{io::Read, result}; +use tokio::{io::AsyncReadExt, sync::broadcast}; +use tokio::{net::TcpStream, time}; +use tracing::{debug, error, info, warn}; +pub struct NetworkMonitor { + config: NetworkMonitorConfig, + event_tx: broadcast::Sender, +} +impl NetworkMonitor { + pub fn new(config: NetworkMonitorConfig, event_tx: broadcast::Sender) -> Self { + Self { + config, + event_tx, + } + } + pub fn check_interval(&self) -> u64 { + self.config.interval_secs + } + async fn check_and_publish(&self) { + let client = reqwest::Client::new(); + let check_result = client.get(&self.config.target_url).send().await; + match check_result { + Ok(response) => match response.status().is_success() { + true => { + debug!("[NetMonitor] {} is healthy", self.config.name); + } + false => { + warn!( + "[NetMonitor] {} is unhealthy, status: {}", + self.config.name, + response.status() + ); + } + }, + Err(e) => { + if e.is_connect() { + warn!("[NetMonitor] {} is unreachable: {}", self.config.name, e); + } else if e.is_timeout() { + warn!("[NetMonitor] {} request timed out: {}", self.config.name, e); + } else { + warn!( + "[NetMonitor] {} encountered an error: {}", + self.config.name, e + ); + } + self.publish_process_disconnected(); + //TODO 不能确定这几个事件究竟是否是需要重连，考虑设置成多个不同event发送 + } + } + } + async fn monitor_task_loop(&self) { + let mut interval = time::interval(time::Duration::from_secs(self.check_interval())); + + info!("[NetMonitor] Task for '{}' started.", self.config.name); + loop { + interval.tick().await; + self.check_and_publish().await; + } + } + fn publish_process_disconnected(&self) { + let event = ProcessEvent::ProcessDisconnected { + name: self.config.name.clone(), //name是被检测的进程的name + url: self.config.target_url.clone(), + //和PidMonitor比起，稍微不太一样的是Pid的config内部含的是pid file的地址。需要去读取才可以用，而target_url是可以直接使用的 + }; + debug!( + "[{}] Publishing ProcessDisconnected event for HTTP {}", + self.config.name, self.config.target_url + ); + + match self.event_tx.send(event) { + Ok(receiver_count) => { + debug!( + "[{}] Sent ProcessDisconnected event for HTTP {} to {} receivers", + self.config.name, self.config.target_url, receiver_count + ); + } + Err(_) => { + warn!( + "[{}] Failed to publish ProcessDisconnected event for HTTP {}: no active subscribers", + self.config.name, self.config.target_url + ); + } + } + } +} + +#[async_trait] +impl Monitor for NetworkMonitor { + async fn run(self) { + self.monitor_task_loop().await; + } + fn name(&self) -> String { + self.config.name.clone() + } +} diff --git a/healer/src/monitor/pid_monitor.rs b/healer/src/monitor/pid_monitor.rs new file mode 100644 index 0000000000000000000000000000000000000000..558ecfc66c42f693ea5ced569d0c2b24817ef81c --- /dev/null +++ b/healer/src/monitor/pid_monitor.rs @@ -0,0 +1,136 @@ +// src/monitor/pid_monitor.rs + +use async_trait::async_trait; +use nix::Error as NixError; +use nix::errno::Errno; +use nix::sys::signal::{Signal as NixSignal, kill}; +use nix::unistd::Pid; +use tokio::fs; +use tokio::sync::broadcast; +use tokio::time::{self, Duration as TokioDuration}; +use tracing::{debug, warn}; +// 从 config 模块引入 PidMonitor 所需的、具体的配置结构体 +use super::Monitor; +use crate::config::PidMonitorConfig; +use crate::event_bus::ProcessEvent; +use tracing::info; +pub struct PidMonitor { + config: PidMonitorConfig, + event_tx: broadcast::Sender, +} + +impl PidMonitor { + pub fn new(config: PidMonitorConfig, event_tx: broadcast::Sender) -> Self { + Self { config, event_tx } + } + pub fn check_interval(&self) -> u64 { + self.config.interval_secs + } + fn publish_process_down(&self, pid: u32) { + let event = ProcessEvent::ProcessDown { + name: self.config.name.clone(), //name是被检测的进程的name + pid, + }; + debug!( + "[{}] Publishing ProcessDown event for PID {}", + self.config.name, pid + ); + + match self.event_tx.send(event) { + Ok(receiver_count) => { + debug!( + "[{}] Sent ProcessDown event for PID {} to {} receivers", + self.config.name, pid, receiver_count + ); + } + Err(_) => { + warn!( + "[{}] Failed to publish ProcessDown event for PID {}: no active subscribers", + self.config.name, pid + ); + } + } + } + + async fn monitor_task_loop(&self) { + let monitor_name = self.name(); + let interval_secs = self.check_interval(); + let mut interval = time::interval(TokioDuration::from_secs(interval_secs)); + info!( + "[Monitor] Task for '{}' started with a {}s interval.", + monitor_name, interval_secs + ); + loop { + interval.tick().await; + self.check_and_publish().await; + } + } + + async fn check_and_publish(&self) { + let monitor_name = &self.config.name; + let pid_file_path = &self.config.pid_file_path; + debug!( + "[{}] Performing health check on PID file: {}", + monitor_name, + pid_file_path.display() + ); + // 异步读取 PID 文件内容 + let pid_str = match fs::read_to_string(pid_file_path).await { + Ok(content) => content, + Err(e) => { + warn!( + "[{}] Failed to read PID file {}: {}. Assuming process is down.", + monitor_name, + pid_file_path.display(), + e + ); + return; + } + }; + + // 解析 PID + let pid = match pid_str.trim().parse::() { + Ok(p) if p > 0 => p, + _ => { + warn!( + "[{}] Failed to parse a valid PID from file {}. Content: '{}'. Assuming process is down.", + monitor_name, + pid_file_path.display(), + pid_str + ); + return; + } + }; + + // 使用信号检查进程是否存在 + let process_pid = Pid::from_raw(pid); + match kill(process_pid, None) { + Ok(_) => { + debug!("[{}] Process (PID: {}) is alive.", monitor_name, pid); + } + Err(Errno::ESRCH) => { + info!( + "[{}] Process (PID: {}) not found (ESRCH). Process has exited.", + monitor_name, pid + ); + self.publish_process_down(pid as u32); + } + Err(e) => { + warn!( + "[{}] Error checking process (PID: {}): {}. Unable to determine status.", + monitor_name, pid, e + ); + } + } + } +} + +#[async_trait] +impl Monitor for PidMonitor { + fn name(&self) -> String { + self.config.name.clone() + } + async fn run(self) { + self.monitor_task_loop().await; + } +} diff --git a/healer/src/monitor_manager.rs b/healer/src/monitor_manager.rs new file mode 100644 index 0000000000000000000000000000000000000000..795d4fde36e57148ee01eed40e47f059921c6927 --- /dev/null +++ b/healer/src/monitor_manager.rs @@ -0,0 +1,225 @@ +use crate::{ + config::{NetworkMonitorConfig, ProcessConfig}, + event_bus::ProcessEvent, + monitor::{ + Monitor, ebpf_monitor::EbpfMonitor, network_monitor::NetworkMonitor, + pid_monitor::PidMonitor, + }, +}; +use anyhow::Result; +use std::collections::HashMap; +use std::time::Duration; +use sysinfo::NetworkData; +use tokio::sync::broadcast; +use tokio::task::JoinHandle; +use tracing::{error, info, warn}; + +// 监控器管理器，负责统一管理不同类型的监控器 +pub struct MonitorManager { + // eBPF 监控器 - 全局单例，始终运行 + ebpf_monitor: Option, + // 当前被 eBPF 监控的进程配置 + watched_ebpf_configs: HashMap, + // PID 监控器 - 按需启停 + running_monitors: HashMap>, + // 网络监控器 - 按需启停 + // running_network_monitors: HashMap>, + // 事件发送器 + event_sender: broadcast::Sender, +} + +impl MonitorManager { + pub async fn new(event_sender: broadcast::Sender) -> Result { + // 初始化全局 eBPF 监控器 + let ebpf_monitor = match EbpfMonitor::new(event_sender.clone()).await { + Ok(monitor) => { + info!("MonitorManager: eBPF Monitor initialized successfully."); + Some(monitor) + } + Err(e) => { + error!("MonitorManager: Failed to initialize eBPF Monitor: {}", e); + None + } + }; + + Ok(Self { + ebpf_monitor, + watched_ebpf_configs: HashMap::new(), + running_monitors: HashMap::new(), + // running_network_monitors: HashMap::new(), + event_sender, + }) + } + + // 根据新的配置更新所有监控器 + pub async fn reconcile(&mut self, processes: &[ProcessConfig]) -> Result<()> { + info!("MonitorManager: Starting reconciliation..."); + + // 分离不同类型的监控配置, ebpf和其他的pid network监视器都略有不同 + let (ebpf_configs, not_ebpf_configs): (Vec<_>, Vec<_>) = processes + .iter() + .filter(|p| p.enabled) + .partition(|p| p.get_ebpf_monitor_config().is_some()); + + // 更新 eBPF 监控器 + self.reconcile_ebpf_monitors(ebpf_configs).await?; + + // 更新 PID 监控器 + self.reconcile_monitors(not_ebpf_configs).await?; + + info!("MonitorManager: Reconciliation completed."); + Ok(()) + } + + // 更新 eBPF 监控器的监控列表 + async fn reconcile_ebpf_monitors( + &mut self, + desired_configs: Vec<&ProcessConfig>, + ) -> Result<()> { + let Some(ref mut ebpf_monitor) = self.ebpf_monitor else { + warn!("MonitorManager: eBPF monitor not available, skipping eBPF reconciliation."); + return Ok(()); + }; + + // 构建期望的配置映射 + let desired_configs_map: HashMap = desired_configs + .into_iter() + .map(|config| (config.name.clone(), config.clone())) + .collect(); + + // 移除不再需要的监控 + let configs_to_remove: Vec = self + .watched_ebpf_configs + .keys() + .filter(|name| !desired_configs_map.contains_key(*name)) + .cloned() + .collect(); + + for name in configs_to_remove { + if let Some(config) = self.watched_ebpf_configs.remove(&name) { + if let Some(ebpf_config) = config.get_ebpf_monitor_config() { + info!("MonitorManager: Removing eBPF watch for process '{}'", name); + if let Err(e) = ebpf_monitor.unwatch_config(ebpf_config).await { + error!( + "MonitorManager: Failed to unwatch config for '{}': {}", + name, e + ); + } + } + } + } + + // 添加新的监控 + for (name, config) in desired_configs_map { + if !self.watched_ebpf_configs.contains_key(&name) { + if let Some(ebpf_config) = config.get_ebpf_monitor_config() { + info!("MonitorManager: Adding eBPF watch for process '{}'", name); + match ebpf_monitor.watch_config(ebpf_config).await { + Ok(()) => { + self.watched_ebpf_configs.insert(name, config); + } + Err(e) => { + error!( + "MonitorManager: Failed to watch config for '{}': {}", + name, e + ); + } + } + } + } + } + + Ok(()) + } + + // 更新 PID 监控器的启停状态 + async fn reconcile_monitors(&mut self, desired_configs: Vec<&ProcessConfig>) -> Result<()> { + // 构建期望的配置映射 + let desired_configs_map: HashMap = desired_configs + .into_iter() + .map(|config| (config.name.clone(), config)) + .collect(); + + // 停止不再需要的监控器 + let monitors_to_stop: Vec = self + .running_monitors + .keys() + .filter(|name| !desired_configs_map.contains_key(*name)) + .cloned() + .collect(); + + for name in monitors_to_stop { + info!( + "MonitorManager: Stopping not-ebpf monitor for process '{}'", + name + ); + if let Some(handle) = self.running_monitors.remove(&name) { + // 取消任务并等待一小段时间 + handle.abort(); + // 给任务一些时间来清理 + tokio::time::sleep(Duration::from_millis(100)).await; + } + } + + // 启动新的监控器或重启已结束的监控器 + for (name, process_config) in desired_configs_map { + let should_start = match self.running_monitors.get(&name) { + Some(handle) => handle.is_finished(), + None => true, + }; + + if should_start { + if let Some(pid_config) = process_config.get_pid_monitor_config() { + info!( + "MonitorManager: Starting PID monitor for process '{}'", + name + ); + let monitor = PidMonitor::new(pid_config, self.event_sender.clone()); + let handle = tokio::spawn(monitor.run()); + self.running_monitors.insert(name.clone(), handle); + } else if let Some(network_config) = process_config.get_network_monitor_config() { + info!( + "MonitorManager: Starting Network monitor for process '{}'", + name + ); + let monitor = NetworkMonitor::new(network_config, self.event_sender.clone()); + let handle = tokio::spawn(monitor.run()); + self.running_monitors.insert(name.clone(), handle); + } + } + } + + Ok(()) + } + + // 关闭所有监控器 + pub async fn shutdown(&mut self) { + info!("MonitorManager: Shutting down all monitors..."); + + // 停止所有 非ebpf 监控器 + let mut handles_to_wait = Vec::new(); + for (name, handle) in self.running_monitors.drain() { + info!("MonitorManager: Stopping monitor for '{}'", name); + handle.abort(); + handles_to_wait.push(handle); + } + + // 等待所有任务完成，但设置超时 + for handle in handles_to_wait { + if let Err(e) = tokio::time::timeout(Duration::from_secs(2), handle).await { + warn!( + "MonitorManager: not-ebpf monitor task did not complete within timeout: {:?}", + e + ); + } + } + + // 关闭 eBPF 监控器，否则守护进程杀不死 + if let Some(mut ebpf_monitor) = self.ebpf_monitor.take() { + info!("MonitorManager: Shutting down eBPF monitor..."); + ebpf_monitor.shutdown().await; + } + + info!("MonitorManager: All monitors stopped."); + } +} diff --git a/healer/src/service_manager.rs b/healer/src/service_manager.rs new file mode 100644 index 0000000000000000000000000000000000000000..fe04c797feb46ff6756c32f013b72f6b2b33a996 --- /dev/null +++ b/healer/src/service_manager.rs @@ -0,0 +1,109 @@ +use crate::{ + config::AppConfig, + event_bus::ProcessEvent, + subscriber::{Subscriber, process_healer::ProcessHealer}, +}; +use nix::errno::Errno; +use nix::sys::wait::{WaitPidFlag, WaitStatus, waitpid}; +use std::sync::Arc; +use tokio::signal::unix::{self, SignalKind}; +use tokio::sync::{RwLock, broadcast}; +use tracing::{debug, error, info, warn}; + +/// 服务管理器，负责管理持久性后台任务 +pub struct ServiceManager; + +impl ServiceManager { + /// 启动所有持久性后台服务 + pub fn spawn_persistent_services( + event_sender: &broadcast::Sender, + config: &Arc>, + ) { + Self::spawn_process_healer(event_sender, config); + Self::spawn_zombie_reaper(); + } + + /// 启动进程自愈服务 + fn spawn_process_healer( + event_sender: &broadcast::Sender, + config: &Arc>, + ) { + let healer_receiver = event_sender.subscribe(); + let healer_config = Arc::clone(config); + + tokio::spawn(async move { + let mut healer = ProcessHealer::new(healer_receiver, healer_config).await; + info!("ServiceManager: ProcessHealer service started."); + loop { + match healer.event_rx.recv().await { + Ok(event) => { + healer.handle_event(event).await; + } + Err(broadcast::error::RecvError::Lagged(n)) => { + warn!( + "ServiceManager: ProcessHealer lagged, missed {} messages", + n + ); + } + Err(_) => { + error!("ServiceManager: ProcessHealer event channel closed, exiting."); + break; + } + } + } + }); + } + + /// 启动僵尸进程清理服务 + fn spawn_zombie_reaper() { + tokio::spawn(async { + info!("ServiceManager: Zombie reaper service started, listening for SIGCHLD."); + + match unix::signal(SignalKind::child()) { + Ok(mut stream) => loop { + stream.recv().await; + Self::reap_zombies(); + }, + Err(e) => { + error!( + "ServiceManager: Failed to register SIGCHLD signal handler: {}", + e + ); + } + } + }); + } + + /// 清理僵尸进程 + fn reap_zombies() { + loop { + match waitpid(None, Some(WaitPidFlag::WNOHANG)) { + Ok(WaitStatus::Exited(pid, status)) => { + info!( + "ServiceManager: Reaped child {} which exited with status {}", + pid, status + ); + } + Ok(WaitStatus::Signaled(pid, signal, _)) => { + info!( + "ServiceManager: Reaped child {} which was killed by signal {}", + pid, signal + ); + } + Ok(WaitStatus::StillAlive) | Err(Errno::ECHILD) => { + break; // 没有更多已终止的子进程了 + } + Ok(other) => { + debug!( + "ServiceManager: Reaped child with other status: {:?}", + other + ); + } + Err(e) => { + error!("ServiceManager: waitpid failed: {}", e); + break; + } + } + } + } +} diff --git a/healer/src/signal_handler.rs b/healer/src/signal_handler.rs new file mode 100644 index 0000000000000000000000000000000000000000..9527fb63d626c9d54cbcf84b4a8a2160ece986e9 --- /dev/null +++ b/healer/src/signal_handler.rs @@ -0,0 +1,38 @@ +use anyhow::Result; +use tokio::signal::unix::{self, SignalKind}; +use tracing::info; + +/// 信号处理器，负责处理系统信号 +pub struct SignalHandler; + +#[derive(Debug)] +pub enum SignalEvent { + /// 配置重载信号 (SIGHUP) + ConfigReload, + /// 关闭信号 (SIGTERM, SIGINT) + Shutdown, +} + +impl SignalHandler { + /// 等待下一个信号事件 + pub async fn wait_for_signal() -> Result { + let mut hup_signal = unix::signal(SignalKind::hangup())?; + let mut term_signal = unix::signal(SignalKind::terminate())?; + let mut int_signal = unix::signal(SignalKind::interrupt())?; + + tokio::select! { + _ = hup_signal.recv() => { + info!("SignalHandler: Received SIGHUP, triggering configuration reload."); + Ok(SignalEvent::ConfigReload) + } + _ = term_signal.recv() => { + info!("SignalHandler: Received SIGTERM, initiating graceful shutdown."); + Ok(SignalEvent::Shutdown) + } + _ = int_signal.recv() => { + info!("SignalHandler: Received SIGINT (Ctrl+C), initiating graceful shutdown."); + Ok(SignalEvent::Shutdown) + } + } + } +} diff --git a/healer/src/subscriber.rs b/healer/src/subscriber.rs new file mode 100644 index 0000000000000000000000000000000000000000..299454e3f0a0a3845f8cfada7ede434309f81376 --- /dev/null +++ b/healer/src/subscriber.rs @@ -0,0 +1,7 @@ +use crate::event_bus; +use async_trait::async_trait; +pub mod process_healer; +#[async_trait] +pub trait Subscriber: Send + Sync { + async fn handle_event(&mut self, event: event_bus::ProcessEvent); +} diff --git a/healer/src/subscriber/process_healer.rs b/healer/src/subscriber/process_healer.rs new file mode 100644 index 0000000000000000000000000000000000000000..994ad4abf66dba27ed17114fe60950be5215cc41 --- /dev/null +++ b/healer/src/subscriber/process_healer.rs @@ -0,0 +1,305 @@ +use super::Subscriber; +use crate::config::{self, AppConfig, ProcessConfig, RecoveryConfig, RegularHealerFields}; +use crate::event_bus::ProcessEvent; +use async_trait::async_trait; +use serde::de::value::StrDeserializer; +use std::collections::{HashMap, VecDeque}; +use std::iter::StepBy; +use std::os::unix::process::{self, CommandExt}; +use std::process::{Command, Stdio}; +use std::{default, fs}; +use std::{sync::Arc, time::Instant}; +use tokio::sync::RwLock; +use tokio::sync::{Mutex, broadcast}; +use tracing::{debug, info, warn}; +use users::get_user_by_name; + +#[derive(PartialEq)] +enum State { + Closed, + Open, + HalfOpen, +} +struct ProcessRecoveryStats { + recovery_session_starts: VecDeque, + recovery_state: State, + in_cooldown_until: Option, + half_open_safe_until: Option, + // half_open_retry_flag: Option, +} +impl Default for ProcessRecoveryStats { + fn default() -> Self { + Self { + recovery_session_starts: VecDeque::new(), + recovery_state: State::Closed, + in_cooldown_until: None, + half_open_safe_until: None, + } + } +} +pub struct ProcessHealer { + pub event_rx: broadcast::Receiver, + pub app_config: Arc>, + process_recovery_windows: Mutex>, +} + +impl ProcessHealer { + pub async fn new( + rx: broadcast::Receiver, + config: Arc>, + ) -> Self { + let recover_map = { + let config_guard = config.read().await; + config_guard + .processes + .iter() + .map(|p| (p.name.clone(), ProcessRecoveryStats::default())) + .collect::>() + }; // 读锁在这个作用域结束时自动释放 + + Self { + event_rx: rx, + app_config: config, + process_recovery_windows: Mutex::new(recover_map), + } + } + + pub async fn heal_process(&mut self, name: &String) { + // 使用超时机制获取配置锁，避免无限期阻塞 + //breaker 返回true，说明仍在熔断；返回false说明可以执行 + if self.check_circuit_breaker(&name).await { + warn!( + target = "healer_action", + process_name = %name, + "Circuit breaker is open, skipping recovery for process {}.", + name + ); + return; + } + let config_guard = + match tokio::time::timeout(std::time::Duration::from_secs(5), self.app_config.read()) + .await + { + Ok(guard) => guard, + Err(_) => { + warn!( + target = "healer_action", + process_name = %name, + "Failed to acquire config lock within timeout, skipping recovery." + ); + return; + } + }; + + if let Some(process_config) = config_guard.get_process_config_for(&name) { + let command_to_run = &process_config.command; + let args = &process_config.args; + info!(target = "healer_event", process_name = %name, "Parsed the restart command. Conducting recovery."); + + // 创建日志目录（如果不存在） + if let Err(e) = std::fs::create_dir_all("/var/log/healer") { + warn!(target = "healer_action", process_name = %name, error = %e, "Failed to create log directory, using /tmp"); + } + + let child_log_path = format!("/var/log/healer/{}.restarted.log", name); + let child_output_file = match fs::File::create(&child_log_path) { + Ok(file) => file, + Err(e) => { + warn!( + target = "healer_action", + process_name = %name, + error = %e, + "Failed to create log file, trying /tmp" + ); + // 尝试在/tmp创建日志文件 + let fallback_path = format!("/tmp/healer_{}.restarted.log", name); + match fs::File::create(&fallback_path) { + Ok(file) => file, + Err(e2) => { + tracing::error!( + target = "healer_action", + process_name = %name, + error = %e2, + "Failed to create fallback log file, aborting recovery." + ); + return; + } + } + } + }; + + let mut command = Command::new(command_to_run); + command.args(args); + + // 改进的权限处理 + if !process_config.run_as_root { + if let Some(username) = &process_config.run_as_user { + match get_user_by_name(username) { + Some(user) => { + command.uid(user.uid()); + command.gid(user.primary_group_id()); + info!(target: "healer_action", process_name = %name, user = %username, uid = %user.uid(), "Dropping privileges to run as specified user."); + } + None => { + warn!(target: "healer_action", process_name = %name, user = %username, "Specified user not found. Process will run as root. This is a security risk."); + } + } + } else { + warn!(target: "healer_action", process_name = %name, "run_as_root is false but no run_as_user specified. Process will run as root."); + } + } + + // 被恢复的进程重定向io + command.stdout(Stdio::from(child_output_file.try_clone().unwrap())); + command.stderr(Stdio::from(child_output_file)); + + match command.spawn() { + Ok(child) => { + info!(target = "healer_event", process_name = %name, process_pid = %child.id(), "Successfully restarted process."); + } + Err(e) => { + tracing::error!(target = "healer_action", + process_name = %name, + error = %e, + "Failed to restart process. This might be due to permission issues or invalid command path."); + } + } + } else { + warn!( + target = "healer_action", + process_name = %name, + "No configuration found for process." + ); + } + } + async fn check_circuit_breaker(&mut self, name: &String) -> bool { + match self.process_recovery_windows.lock().await.get_mut(name) { + Some(stats) => { + debug!("[{}] Checking circuit breaker state.", name); + match stats.recovery_state { + State::Closed => { + let config_guard = self.app_config.read().await; + if let Some(process_config) = config_guard.get_process_config_for(name) { + if let RecoveryConfig::Regular(regular_healer_fields) = + &process_config.recovery + { + //遍历一遍，把时间超过窗口期的恢复次数删除掉 + //Rust不用for和迭代器遍历，retain 来判断窗口期时间 + stats.recovery_session_starts.retain(|start_time| { + start_time.elapsed().as_secs() + < regular_healer_fields.retry_window_secs + }); + + if stats.recovery_session_starts.len() + == regular_healer_fields.retries as usize + { + //熔断了，切换为开路，设置好冷却时间，同时重置历史累计的回复次数 + stats.recovery_state = State::Open; + stats.in_cooldown_until = Some( + Instant::now() + + std::time::Duration::from_secs( + regular_healer_fields.cooldown_secs, + ), + ); + stats.recovery_session_starts.clear(); + return true; + } else { + stats.recovery_session_starts.push_back(Instant::now()); + debug!( + "Process {} has tried {} times", + &name, + stats.recovery_session_starts.len() + ); + return false; + } + } else if let RecoveryConfig::NotRegular(_) = &process_config.recovery { + warn!("Shouldn'be here, NotRegular is not implemented yet"); + return false; // 开还是关的返回值还未确定，健壮性有待商榷 (Todo) + } else { + warn!("No recovery configuration found for process {}", name); + return false; // 开还是关的返回值还未确定，健壮性有待商榷 + } + } else { + warn!("No configuration found for process {}", name); + return false; + } + } + State::Open => { + if let Some(cooldown_until) = stats.in_cooldown_until { + if Instant::now() < cooldown_until { + return true; // 熔断器仍然处于开启状态 + } else { + // 如果半开重试标志为true，说明可以尝试恢复 + stats.recovery_state = State::HalfOpen; + stats.recovery_session_starts.clear(); + stats.in_cooldown_until = None; // 清除冷却时间 + stats.half_open_safe_until = + Some(Instant::now() + std::time::Duration::from_secs(2)); //Todo: 这里的2秒是个写死的，实际应该根据配置来设置或者给出默认值 + return false; + } + } else { + // in_cool_down_until为None也处理为可以半开路, 但是不应该走到这里 + warn!( + "Shouldn't be here, in_cooldown_until is None for process {}", + name + ); + warn!( + "No cooldown time set for process {}, assuming it can be recovered.", + name + ); + // 如果半开重试标志为true，说明 + stats.recovery_state = State::HalfOpen; + stats.recovery_session_starts.clear(); + stats.in_cooldown_until = None; // 清除冷却时间 + return false; + } + } + State::HalfOpen => { + // 半开状态，尝试恢复 + if let Some(safe_until) = stats.half_open_safe_until { + if Instant::now() < safe_until { + //切换成Open + //可以考虑在后续实现为指数回避 (Todo) + warn!( + "Process {} is in half-open state, but safe time has not passed yet.", + name + ); + stats.recovery_state = State::Open; + stats.half_open_safe_until = None; // 清除半开安全时间 + stats.recovery_session_starts.clear(); + return true; // 半开状态，不能恢复 + } else { + // 半开状态结束，重置为关闭状态 + stats.recovery_state = State::Closed; + stats.half_open_safe_until = None; + stats.recovery_session_starts.clear(); + return false; // 可以恢复 + } + } else { + warn!("Half-open state without safe time set for process {}", name); + stats.recovery_state = State::Closed; + stats.half_open_safe_until = None; + stats.recovery_session_starts.clear(); + return false; // 可以恢复 + } + } + } + } + None => true, + } + } +} + +#[async_trait] +impl Subscriber for ProcessHealer { + async fn handle_event(&mut self, event: ProcessEvent) { + //heal_process + if let ProcessEvent::ProcessDown { name, pid } = &event { + info!(target = "healer_event", process_name = %name, process_pid = %pid, "Received ProcessDown event. Initiating recovery process."); + self.heal_process(name).await + } else if let ProcessEvent::ProcessDisconnected { name, url } = &event { + info!(target = "healer_event", process_name = %name, url = %url, "Received ProcessDisconnected event. Initiating recovery process."); + self.heal_process(name).await; + } + } +} diff --git a/healer/src/utils.rs b/healer/src/utils.rs new file mode 100644 index 0000000000000000000000000000000000000000..72ccbcd9a525e7b73227d89fa9d34b3885781499 --- /dev/null +++ b/healer/src/utils.rs @@ -0,0 +1,99 @@ +use std::collections::HashMap; +use std::default::Default; +use sysinfo::{ProcessRefreshKind, RefreshKind, System, UpdateKind}; +use tracing::debug; + +pub fn find_pid_by_exe_path(path: &str) -> Option { + let process_kind = ProcessRefreshKind::default().with_exe(UpdateKind::Always); + let rk = RefreshKind::nothing().with_processes(process_kind); + let sys = System::new_with_specifics(rk); + for process in sys.processes().values() { + debug!("the exe for pid {} is {:?}", process.pid(), process.exe()); + if let Some(exe_path) = process.exe() { + if exe_path.to_str() == Some(path) { + let pid_as_usize = usize::from(process.pid()); + return Some(pid_as_usize as u32); + } + } + } + None +} + +/// 截断进程名到内核限制的16个字符（包括null终止符，所以实际是15个字符） +pub fn truncate_process_name(name: &str) -> String { + const MAX_COMM_LEN: usize = 15; // 内核中TASK_COMM_LEN - 1 + if name.len() <= MAX_COMM_LEN { + name.to_string() + } else { + name.chars().take(MAX_COMM_LEN).collect() + } +} + +/// 根据截断的进程名查找完整的进程配置名 +/// 返回可能匹配的进程配置名列表 +pub fn find_process_configs_by_truncated_name( + truncated_name: &str, + process_names: &[String], +) -> Vec { + let mut matches = Vec::new(); + + for process_name in process_names { + let truncated_config_name = truncate_process_name(process_name); + if truncated_config_name == truncated_name { + matches.push(process_name.clone()); + } + } + + matches +} + +/// 构建进程名到配置名的映射表 +/// 用于快速查找截断名对应的完整配置 +pub fn build_process_name_mapping(process_names: &[String]) -> HashMap> { + let mut mapping = HashMap::new(); + + for process_name in process_names { + let truncated = truncate_process_name(process_name); + mapping + .entry(truncated) + .or_insert_with(Vec::new) + .push(process_name.clone()); + } + + mapping +} + +/// 从进程名获取可执行文件名部分 +/// 例如："/usr/bin/nginx" -> "nginx" +pub fn extract_executable_name(command: &str) -> String { + std::path::Path::new(command) + .file_name() + .and_then(|name| name.to_str()) + .unwrap_or(command) + .to_string() +} + +/// 匹配进程名：处理截断名可能对应多个配置的情况 +/// 优先返回精确匹配，如果有多个匹配则返回第一个 +pub fn smart_match_process_name( + truncated_name: &str, + name_mapping: &HashMap>, +) -> Option { + if let Some(matches) = name_mapping.get(truncated_name) { + if matches.len() == 1 { + Some(matches[0].clone()) + } else if matches.len() > 1 { + tracing::warn!( + "Multiple process configs match truncated name '{}': {:?}. Using first match: '{}'", + truncated_name, + matches, + matches[0] + ); + Some(matches[0].clone()) + } else { + None + } + } else { + None + } +}