From 4a79fdc5be2a6e016e6d106a35b2571d289c5a79 Mon Sep 17 00:00:00 2001
From: Quentin Gliech <quenting@element.io>
Date: Wed, 10 Dec 2025 16:45:48 +0100
Subject: [PATCH] Expose process metrics on Linux

---
 Cargo.lock                  | 33 +++++++++++++++++++++++++++++++++
 Cargo.toml                  |  2 ++
 crates/cli/Cargo.toml       |  1 +
 crates/cli/src/telemetry.rs |  3 +++
 4 files changed, 39 insertions(+)

diff --git a/Cargo.lock b/Cargo.lock
index 421938132..b54f3a91d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3170,6 +3170,7 @@ dependencies = [
  "mas-tower",
  "opentelemetry",
  "opentelemetry-http",
+ "opentelemetry-instrumentation-process",
  "opentelemetry-jaeger-propagator",
  "opentelemetry-otlp",
  "opentelemetry-prometheus-text-exporter",
@@ -4132,6 +4133,17 @@ dependencies = [
  "reqwest",
 ]
 
+[[package]]
+name = "opentelemetry-instrumentation-process"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a81f1738bbdcf58eae20bd85ab0973f9c1f700ba37789e3253dc4e7ba61855c"
+dependencies = [
+ "opentelemetry",
+ "opentelemetry-semantic-conventions",
+ "procfs",
+]
+
 [[package]]
 name = "opentelemetry-jaeger-propagator"
 version = "0.31.0"
@@ -4648,6 +4660,27 @@ dependencies = [
  "yansi",
 ]
 
+[[package]]
+name = "procfs"
+version = "0.18.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25485360a54d6861439d60facef26de713b1e126bf015ec8f98239467a2b82f7"
+dependencies = [
+ "bitflags",
+ "procfs-core",
+ "rustix",
+]
+
+[[package]]
+name = "procfs-core"
+version = "0.18.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6401bf7b6af22f78b563665d15a22e9aef27775b79b149a66ca022468a4e405"
+dependencies = [
+ "bitflags",
+ "hex",
+]
+
 [[package]]
 name = "prost"
 version = "0.14.1"
diff --git a/Cargo.toml b/Cargo.toml
index 7b1aba0d4..88e507328 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -401,6 +401,8 @@ features = ["trace", "metrics"]
 [workspace.dependencies.opentelemetry-http]
 version = "0.31.0"
 features = ["reqwest"]
+[workspace.dependencies.opentelemetry-instrumentation-process]
+version = "0.1.2"
 [workspace.dependencies.opentelemetry-jaeger-propagator]
 version = "0.31.0"
 [workspace.dependencies.opentelemetry-otlp]
diff --git a/crates/cli/Cargo.toml b/crates/cli/Cargo.toml
index 1baebd12c..21920e9ee 100644
--- a/crates/cli/Cargo.toml
+++ b/crates/cli/Cargo.toml
@@ -57,6 +57,7 @@ tracing-subscriber.workspace = true
 tracing-opentelemetry.workspace = true
 opentelemetry.workspace = true
 opentelemetry-http.workspace = true
+opentelemetry-instrumentation-process.workspace = true
 opentelemetry-jaeger-propagator.workspace = true
 opentelemetry-otlp.workspace = true
 opentelemetry-prometheus-text-exporter.workspace = true
diff --git a/crates/cli/src/telemetry.rs b/crates/cli/src/telemetry.rs
index 54222c8be..39b418457 100644
--- a/crates/cli/src/telemetry.rs
+++ b/crates/cli/src/telemetry.rs
@@ -61,6 +61,9 @@ pub fn setup(config: &TelemetryConfig) -> anyhow::Result<()> {
     init_tracer(&config.tracing).context("Failed to configure traces exporter")?;
     init_meter(&config.metrics).context("Failed to configure metrics exporter")?;
 
+    opentelemetry_instrumentation_process::init()
+        .context("Failed to configure process instrumentation")?;
+
     let handle = ::tokio::runtime::Handle::current();
     self::tokio::observe(handle.metrics());