日志服务：通过OpenTelemetry接入Rust Trace数据

操作步骤

1. 添加依赖项。

   [package]
   name = "test"
   version = "0.1.0"
   authors = [""]
   edition = "2018"
   
   # See more keys and their definitions at The Manifest Format.
   
   [dependencies]
   futures = "0.3"
   lazy_static = "1.4"
   opentelemetry = { version = "0.16.0", features = ["tokio-support", "metrics", "serialize"] }
   opentelemetry-otlp = { version = "0.9.0", features = ["tonic", "metrics", "tls", "tls-roots"] }
   serde_json = "1.0"
   tokio = { version = "1.0", features = ["full"] }
   tonic="0.4.0"
   url = "2.2.0"

2. 运行代码。

   如下代码中的变量需根据实际情况替换。关于变量的详细说明，请参见变量说明。

   use opentelemetry::global::shutdown_tracer_provider;
   use opentelemetry::sdk::Resource;
   use opentelemetry::trace::TraceError;
   use opentelemetry::{
       baggage::BaggageExt,
       trace::{TraceContextExt, Tracer},
       Context, Key, KeyValue,
   };
   use opentelemetry::{global, sdk::trace as sdktrace};
   use opentelemetry_otlp::WithExportConfig;
   use std::error::Error;
   use std::time::Duration;
   use tonic::metadata::MetadataMap;
   use tonic::transport::ClientTlsConfig;
   use url::Url;
   static ENDPOINT: &str = "https://${endpoint}";
   static PROJECT: &str = "${project}";
   static INSTANCE_ID: &str = "${instance}";
   static AK_ID: &str = "${access-key-id}";
   static AK_SECRET: &str = "${access-key-secret}";
   static SERVICE_VERSION: &str = "${version}";
   static SERVICE_NAME: &str = "${service}";
   static SERVICE_NAMESPACE: &str = "${service.namespace}";
   static HOST_NAME: &str = "${host}";
   
   static SLS_PROJECT_HEADER: &str = "x-sls-otel-project";
   static SLS_INSTANCE_ID_HEADER: &str = "x-sls-otel-instance-id";
   static SLS_AK_ID_HEADER: &str = "x-sls-otel-ak-id";
   static SLS_AK_SECRET_HEADER: &str = "x-sls-otel-ak-secret";
   static SLS_SERVICE_VERSION: &str = "service.version";
   static SLS_SERVICE_NAME: &str = "service.name";
   static SLS_SERVICE_NAMESPACE: &str = "service.namespace";
   static SLS_HOST_NAME: &str = "host.name";
   
   fn init_tracer() -> Result<sdktrace::Tracer, TraceError> {
       let mut metadata_map = MetadataMap::with_capacity(4);
       metadata_map.insert(SLS_PROJECT_HEADER, PROJECT.parse().unwrap());
       metadata_map.insert(SLS_INSTANCE_ID_HEADER, INSTANCE_ID.parse().unwrap());
       metadata_map.insert(SLS_AK_ID_HEADER, AK_ID.parse().unwrap());
       metadata_map.insert(SLS_AK_SECRET_HEADER, AK_SECRET.parse().unwrap());
   
       let endpoint = ENDPOINT;
       let endpoint = Url::parse(&endpoint).expect("endpoint is not a valid url");
       let resource = vec![
           KeyValue::new(SLS_SERVICE_VERSION, SERVICE_VERSION),
           KeyValue::new(SLS_HOST_NAME, HOST_NAME),
           KeyValue::new(SLS_SERVICE_NAMESPACE, SERVICE_NAMESPACE),
           KeyValue::new(SLS_SERVICE_NAME, SERVICE_NAME),
       ];
   
       opentelemetry_otlp::new_pipeline()
           .tracing()
           .with_exporter(
               opentelemetry_otlp::new_exporter()
                   .tonic()
                   .with_endpoint(endpoint.as_str())
                   .with_metadata(dbg!(metadata_map))
                   .with_tls_config(
                       ClientTlsConfig::new().domain_name(
                           endpoint
                               .host_str()
                               .expect("the specified endpoint should have a valid host"),
                       ),
                   ),
           )
           .with_trace_config(sdktrace::config().with_resource(Resource::new(resource)))
           .install_batch(opentelemetry::runtime::Tokio)
   }
   
   const FOO_KEY: Key = Key::from_static_str("ex.com/foo");
   const BAR_KEY: Key = Key::from_static_str("ex.com/bar");
   const LEMONS_KEY: Key = Key::from_static_str("lemons");
   const ANOTHER_KEY: Key = Key::from_static_str("ex.com/another");
   
   lazy_static::lazy_static! {
       static ref COMMON_ATTRIBUTES: [KeyValue; 4] = [
           LEMONS_KEY.i64(10),
           KeyValue::new("A", "1"),
           KeyValue::new("B", "2"),
           KeyValue::new("C", "3"),
       ];
   }
   
   #[tokio::main]
   async fn main() -> Result<(), Box<dyn Error + Send + Sync + 'static>> {
       let _ = init_tracer()?;
       let tracer = global::tracer("ex.com/basic");
       let _baggage =
           Context::current_with_baggage(vec![FOO_KEY.string("foo1"), BAR_KEY.string("bar1")])
               .attach();
   
       tracer.in_span("operation", |cx| {
           let span = cx.span();
           span.add_event(
               "Nice operation!".to_string(),
               vec![Key::new("bogons").i64(100)],
           );
           span.set_attribute(ANOTHER_KEY.string("yes"));
   
           tracer.in_span("Sub operation...", |cx| {
               let span = cx.span();
               span.set_attribute(LEMONS_KEY.string("five"));
   
               span.add_event("Sub span event".to_string(), vec![]);
           });
       });
   
       tokio::time::sleep(Duration::from_secs(60)).await;
       shutdown_tracer_provider();
       Ok(())
   }

   表 1. 变量说明

   变量	说明	示例
   ${service}	服务名。根据您的实际场景取值即可。	payment
   ${version}	服务版本号。建议按照va.b.c格式定义。	v0.1.2
   ${service.namespace}	服务归属的命名空间。	order
   ${host}	主机名。	localhost
   ${endpoint}	日志服务Project的接入地址，格式为${project}.${region-endpoint}:Port，其中： ${project}：日志服务Project名称。 ${region-endpoint}：日志服务Project所在地域的访问域名，支持公网和阿里云内网（经典网络、VPC）。更多信息，请参见服务入口。 Port：网络端口，固定为10010。	test-project.cn-hangzhou.log.aliyuncs.com:10010
   ${project}	日志服务Project名称。	test-project
   ${instance}	Trace服务实例ID。更多信息，请参见创建Trace实例。	test-traces
   ${access-key-id}	阿里云账号AccessKey ID。 建议您使用只具备日志服务Project写入权限的RAM用户的AccessKey（包括AccessKey ID和AccessKey Secret）。授予RAM用户向指定Project写入数据权限的具体操作，请参见授权。如何获取AccessKey的具体操作，请参见访问密钥。	无
   ${access-key-secret}	阿里云账号AccessKey Secret。 建议您使用只具备日志服务Project写入权限的RAM用户的AccessKey。	无