Add new hardware and software metrics (#11062)

* Add new hardware and software metrics

* Move sysinfo tests into `mod tests`

* Correct a typo in a comment

* Remove unnecessary `nix` dependency

* Fix the version tests

* Add a `--disable-hardware-benchmarks` CLI argument

* Disable hardware benchmarks in the integration tests

* Remove unused import

* Fix benchmarks compilation

* Move code to a new `sc-sysinfo` crate

* Correct `impl_version` comment

* Move `--disable-hardware-benchmarks` to the chain-specific bin crate

* Move printing out of hardware bench results to `sc-sysinfo`

* Move hardware benchmarks to a separate messages; trigger them manually

* Rename some of the fields in the `HwBench` struct

* Revert changes to the telemetry crate; manually send hwbench messages

* Move sysinfo logs into the sysinfo crate

* Move the `TARGET_OS_*` constants into the sysinfo crate

* Minor cleanups

* Move the `HwBench` struct to the sysinfo crate

* Derive `Clone` for `HwBench`

* Fix broken telemetry connection notification stream

* Prevent the telemetry connection notifiers from leaking if they're disconnected

* Turn the telemetry notification failure log into a debug log

* Rename `--disable-hardware-benchmarks` to `--no-hardware-benchmarks`

substrate/client/telemetry/src/lib.rs

@@ -101,6 +101,38 @@ pub struct ConnectionMessage {
 	pub startup_time: String,
 	/// Node's network ID.
 	pub network_id: String,
+
+	/// Node's OS.
+	pub target_os: String,
+
+	/// Node's ISA.
+	pub target_arch: String,
+
+	/// Node's target platform ABI or libc.
+	pub target_env: String,
+
+	/// Node's software and hardware information.
+	pub sysinfo: Option<SysInfo>,
+}
+
+/// Hardware and software information for the node.
+///
+/// Gathering most of this information is highly OS-specific,
+/// so most of the fields here are optional.
+#[derive(Debug, Serialize)]
+pub struct SysInfo {
+	/// The exact CPU model.
+	pub cpu: Option<String>,
+	/// The total amount of memory, in bytes.
+	pub memory: Option<u64>,
+	/// The number of physical CPU cores.
+	pub core_count: Option<u32>,
+	/// The Linux kernel version.
+	pub linux_kernel: Option<String>,
+	/// The exact Linux distribution used.
+	pub linux_distro: Option<String>,
+	/// Whether the node's running under a virtual machine.
+	pub is_virtual_machine: Option<bool>,
 }
 
 /// Telemetry worker.

substrate/client/telemetry/src/node.rs

@@ -179,8 +179,20 @@ where
 					Poll::Ready(Ok(sink)) => {
 						log::debug!(target: "telemetry", "✅ Connected to {}", self.addr);
 
-						for sender in self.telemetry_connection_notifier.iter_mut() {
-							let _ = sender.send(());
+						{
+							let mut index = 0;
+							while index < self.telemetry_connection_notifier.len() {
+								let sender = &mut self.telemetry_connection_notifier[index];
+								if let Err(error) = sender.try_send(()) {
+									if !error.is_disconnected() {
+										log::debug!(target: "telemetry", "Failed to send a telemetry connection notification: {}", error);
+									} else {
+										self.telemetry_connection_notifier.swap_remove(index);
+										continue
+									}
+								}
+								index += 1;
+							}
 						}
 
 						let buf = self