feat(variables): Trace variables host component

Signed-off-by: Caleb Schoepp <[email protected]>

Author: calebschoepp

Cargo.lock

@@ -17,6 +17,10 @@ thiserror = "1"
 tokio = { version = "1", features = ["rt-multi-thread"] }
 vaultrs = "0.6.2"
 serde = "1.0.188"
+tracing = { workspace = true }
 
 [dev-dependencies]
 toml = "0.5"
+
+[lints]
+workspace = true

crates/variables/Cargo.toml

@@ -4,6 +4,7 @@ use anyhow::{Context, Result};
 use async_trait::async_trait;
 
 use spin_expressions::{Key, Provider};
+use tracing::{instrument, Level};
 
 const DEFAULT_ENV_PREFIX: &str = "SPIN_VARIABLE";
 const LEGACY_ENV_PREFIX: &str = "SPIN_CONFIG";
@@ -84,6 +85,7 @@ impl EnvProvider {
 
 #[async_trait]
 impl Provider for EnvProvider {
+    #[instrument(name = "spin_variables.get_from_env", skip(self), err(level = Level::INFO))]
     async fn get(&self, key: &Key) -> Result<Option<String>> {
         tokio::task::block_in_place(|| self.get_sync(key))
     }

crates/variables/src/provider/env.rs

@@ -1,6 +1,7 @@
 use anyhow::{Context, Result};
 use async_trait::async_trait;
 use serde::{Deserialize, Serialize};
+use tracing::{instrument, Level};
 use vaultrs::{
     client::{VaultClient, VaultClientSettingsBuilder},
     error::ClientError,
@@ -41,6 +42,7 @@ struct Secret {
 
 #[async_trait]
 impl Provider for VaultProvider {
+    #[instrument(name = "spin_variables.get_from_vault", skip(self), err(level = Level::INFO), fields(otel.kind = "client"))]
     async fn get(&self, key: &Key) -> Result<Option<String>> {
         let client = VaultClient::new(
             VaultClientSettingsBuilder::default()