mirror of
https://github.com/containers/youki
synced 2024-05-21 06:56:06 +02:00
131 lines
3.6 KiB
Rust
131 lines
3.6 KiB
Rust
//! Contains functions related to printing information about system running Youki
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use std::{fs, path::Path};
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use anyhow::Result;
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use clap::Clap;
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use procfs::{CpuInfo, Meminfo};
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use cgroups;
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#[derive(Clap, Debug)]
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pub struct Info {}
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impl Info {
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pub fn exec(&self) -> Result<()> {
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print_youki();
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print_kernel();
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print_os();
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print_hardware();
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print_cgroups();
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Ok(())
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}
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}
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/// print Version of Youki
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pub fn print_youki() {
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println!("{:<18}{}", "Version", env!("CARGO_PKG_VERSION"));
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}
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/// Print Kernel Release, Version and Architecture
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pub fn print_kernel() {
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let uname = nix::sys::utsname::uname();
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println!("{:<18}{}", "Kernel-Release", uname.release());
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println!("{:<18}{}", "Kernel-Version", uname.version());
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println!("{:<18}{}", "Architecture", uname.machine());
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}
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/// Prints OS Distribution information
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// see https://www.freedesktop.org/software/systemd/man/os-release.html
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pub fn print_os() {
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if let Some(os) = try_read_os_from("/etc/os-release") {
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println!("{:<18}{}", "Operating System", os);
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} else if let Some(os) = try_read_os_from("/usr/lib/os-release") {
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println!("{:<18}{}", "Operating System", os);
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}
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}
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/// Helper function to read the OS Distribution info
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fn try_read_os_from<P: AsRef<Path>>(path: P) -> Option<String> {
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let os_release = path.as_ref();
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if !os_release.exists() {
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return None;
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}
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if let Ok(release_content) = fs::read_to_string(path) {
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let pretty = find_parameter(&release_content, "PRETTY_NAME");
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if let Some(pretty) = pretty {
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return Some(pretty.trim_matches('"').to_owned());
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}
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let name = find_parameter(&release_content, "NAME");
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let version = find_parameter(&release_content, "VERSION");
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if let (Some(name), Some(version)) = (name, version) {
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return Some(format!(
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"{} {}",
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name.trim_matches('"'),
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version.trim_matches('"')
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));
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}
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}
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None
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}
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/// Helper function to find keyword values in OS info string
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fn find_parameter<'a>(content: &'a str, param_name: &str) -> Option<&'a str> {
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let param_value = content
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.lines()
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.find(|l| l.starts_with(param_name))
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.map(|l| l.split_terminator('=').last());
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if let Some(Some(value)) = param_value {
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return Some(value);
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}
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None
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}
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/// Print Hardware information of system
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pub fn print_hardware() {
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if let Ok(cpu_info) = CpuInfo::new() {
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println!("{:<18}{}", "Cores", cpu_info.num_cores());
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}
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if let Ok(mem_info) = Meminfo::new() {
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println!(
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"{:<18}{}",
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"Total Memory",
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mem_info.mem_total / u64::pow(1024, 2)
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);
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}
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}
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/// Print cgroups info of system
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pub fn print_cgroups() {
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if let Ok(cgroup_fs) = cgroups::common::get_supported_cgroup_fs() {
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let cgroup_fs: Vec<String> = cgroup_fs.into_iter().map(|c| c.to_string()).collect();
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println!("{:<18}{}", "cgroup version", cgroup_fs.join(" and "));
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}
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println!("cgroup mounts");
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if let Ok(v1_mounts) = cgroups::v1::util::list_subsystem_mount_points() {
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let mut v1_mounts: Vec<String> = v1_mounts
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.iter()
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.map(|kv| format!(" {:<16}{}", kv.0.to_string(), kv.1.display()))
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.collect();
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v1_mounts.sort();
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for cgroup_mount in v1_mounts {
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println!("{}", cgroup_mount);
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}
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}
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let unified = cgroups::v2::util::get_unified_mount_point();
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if let Ok(mount_point) = unified {
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println!(" {:<16}{}", "unified", mount_point.display());
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}
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}
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