add OpenTelemetry example

Author: timzaak

server/Cargo.toml

@@ -46,6 +46,14 @@ flate2 = "1.0"
 # tokio trace and log
 tracing = "0.1.21"# sync with warp
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+
+#tracing-opentelemetry = "0.24"
+#opentelemetry = "0.23"
+#opentelemetry_sdk = { version = "0.23", features = ["rt-tokio", "metrics"] }
+#opentelemetry-otlp = {version = "0.16", features = ["default", "metrics"]}
+#opentelemetry-resource-detectors = {version = "0.2"}
+#opentelemetry-semantic-conventions = { version = "0.15"}
+
 # tokio cron
 delay_timer = "0.11.6" # dashmap is same
 

server/examples/try_opentelemetry.rs

@@ -0,0 +1,72 @@
+fn main() {
+    
+}
+/*
+use std::time::Duration;
+use opentelemetry::KeyValue;
+use opentelemetry_otlp::{ExportConfig, Protocol, TonicExporterBuilder, WithExportConfig};
+use opentelemetry_resource_detectors::{OsResourceDetector, ProcessResourceDetector};
+use opentelemetry_sdk::{Resource};
+use opentelemetry_sdk::metrics::reader::DefaultAggregationSelector;
+use tracing::{Level};
+use tracing_subscriber::layer::SubscriberExt;
+use tracing_subscriber::util::SubscriberInitExt;
+use opentelemetry_sdk::resource::{ResourceDetector, SdkProvidedResourceDetector, TelemetryResourceDetector};
+use opentelemetry_sdk::trace::config;
+use opentelemetry_semantic_conventions::resource;
+use tracing_subscriber::EnvFilter;
+
+fn resource() -> Resource{
+    let os_resource = OsResourceDetector.detect(Duration::from_secs(0));
+    let process_resource = ProcessResourceDetector.detect(Duration::from_secs(0));
+    let telemetry_resource = TelemetryResourceDetector.detect(Duration::from_secs(0));
+    let sdk_resource = SdkProvidedResourceDetector.detect(Duration::from_secs(0));
+
+    let provided = Resource::new(vec![
+        KeyValue::new(resource::SERVICE_NAME, "spa-server"),
+        KeyValue::new(resource::SERVICE_VERSION, env!("CARGO_PKG_VERSION")),
+    ]);
+
+    sdk_resource
+        .merge(&provided)
+        .merge(&telemetry_resource)
+        .merge(&os_resource)
+        .merge(&process_resource)
+}
+fn otlp_exporter() -> TonicExporterBuilder {
+    let export_config = ExportConfig {
+        endpoint: "http://localhost:4317".to_string(),
+        timeout: Duration::from_secs(3),
+        protocol: Protocol::Grpc
+    };
+    opentelemetry_otlp::new_exporter().tonic()
+        .with_export_config(export_config)
+}
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()>{
+    let tracer = opentelemetry_otlp::new_pipeline()
+        .tracing()
+        .with_exporter(otlp_exporter())
+        .with_trace_config(config().with_resource(resource()))
+        .install_batch(opentelemetry_sdk::runtime::Tokio)?;
+
+    let metrics = opentelemetry_otlp::new_pipeline().metrics(opentelemetry_sdk::runtime::Tokio)
+        .with_exporter(otlp_exporter())
+        .with_resource(resource())
+        .with_aggregation_selector(DefaultAggregationSelector::new()).build()?;
+
+    let filter = EnvFilter::builder()
+        .with_default_directive(Level::INFO.into())
+        .from_env_lossy();
+
+    tracing_subscriber::registry()
+        .with(filter)
+        .with(tracing_subscriber::fmt::layer().compact())// stdout_layer
+        .with(tracing_opentelemetry::MetricsLayer::new(metrics))
+        .with(tracing_opentelemetry::layer().with_tracer(tracer)) // traces_layer
+        .init();
+
+    Ok(())
+}
+*/