fix(repo): Change metrics endpoints to return plain text (#496)

Author: luizstacio

.github/workflows/ci.yaml

@@ -181,7 +181,7 @@ jobs:
       - name: Install nextest
         uses: taiki-e/cache-cargo-install-action@v2
         with:
-          tool: cargo-nextest
+          tool: cargo-nextest@0.9.100
           locked: true
 
       - name: Install dependencies
@@ -275,7 +275,7 @@ jobs:
       - name: Install nextest
         uses: taiki-e/cache-cargo-install-action@v2
         with:
-          tool: cargo-nextest
+          tool: cargo-nextest@0.9.100
           locked: true
 
       - name: Setup Database

cluster/docker/monitoring/prometheus/prometheus.yml

@@ -49,7 +49,7 @@ scrape_configs:
     scrape_interval: 5s
     scrape_timeout: 2s
     scheme: http
-    metrics_path: /api/v1/metrics
+    metrics_path: /metrics
     static_configs:
       - targets:
           - '192.168.0.116:9002'
@@ -58,7 +58,7 @@ scrape_configs:
     scrape_interval: 5s
     scrape_timeout: 2s
     scheme: http
-    metrics_path: /api/v1/metrics
+    metrics_path: /metrics
     static_configs:
       - targets:
           - '192.168.0.116:9003'

crates/web-utils/src/server/http/handlers.rs

@@ -11,10 +11,7 @@ pub async fn get_metrics<T: StateProvider>(
 ) -> impl IntoResponse {
     Response::builder()
         .status(StatusCode::OK)
-        .header(
-            header::CONTENT_TYPE,
-            "application/openmetrics-text; version=1.0.0; charset=utf-8",
-        )
+        .header(header::CONTENT_TYPE, "text/plain; charset=utf-8")
         .body(axum::body::Body::from(state.get_metrics().await))
         .unwrap_or_else(|e| {
             // Fallback in case of response building error (unlikely)