chore: fix pre-release issues and add metrics-otel to CI

Fix two issues found during crates.io publishing and add missing CI
coverage for the metrics-otel crate.

Changes:
- Fix invalid crates.io category `network` to `network-programming` in multiraft
- Remove stale `record_replicate_batch` from otel metrics (trait renamed it to `record_write_batch`)
- Add `metrics-otel` test job to CI workflow

Author: drmingdrmer

.github/workflows/ci.yaml

@@ -235,6 +235,24 @@ jobs:
           RUST_LOG: debug
           RUST_BACKTRACE: full
 
+  metrics-otel:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Setup | Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup | Toolchain
+        uses: actions-rust-lang/setup-rust-toolchain@v1
+        with:
+          toolchain: 'nightly'
+
+      - name: Unit Tests
+        run: cargo test --manifest-path "metrics-otel/Cargo.toml"
+        env:
+          RUST_LOG: debug
+          RUST_BACKTRACE: full
+
   # Feature "serde" will be enabled if one of the member crates enables
   # "serde", such as `memstore`, when building a cargo workspace.
   #

metrics-otel/src/lib.rs

@@ -96,7 +96,6 @@ pub struct Instruments {
     // Histograms for performance metrics
     apply_batch_size: Histogram<u64>,
     storage_append_batch_size: Histogram<u64>,
-    replicate_batch_size: Histogram<u64>,
     write_batch_size: Histogram<u64>,
 
     // Gauges for runtime state
@@ -131,11 +130,6 @@ impl Instruments {
             .with_description("Distribution of log entry counts when appending to storage")
             .build();
 
-        let replicate_batch_size = meter
-            .u64_histogram("openraft.replication.batch_size")
-            .with_description("Distribution of log entry counts in replication RPCs")
-            .build();
-
         let write_batch_size = meter
             .u64_histogram("openraft.write.batch_size")
             .with_description("Distribution of client write entries merged together")
@@ -181,7 +175,6 @@ impl Instruments {
             meter,
             apply_batch_size,
             storage_append_batch_size,
-            replicate_batch_size,
             write_batch_size,
             current_term,
             last_log_index,
@@ -215,10 +208,6 @@ impl MetricsRecorder for Instruments {
         self.storage_append_batch_size.record(entry_count, &[]);
     }
 
-    fn record_replicate_batch(&self, entry_count: u64) {
-        self.replicate_batch_size.record(entry_count, &[]);
-    }
-
     fn record_write_batch(&self, entry_count: u64) {
         self.write_batch_size.record(entry_count, &[]);
     }
@@ -271,7 +260,6 @@ mod tests {
         // Histograms
         instruments.record_apply_batch(10);
         instruments.record_append_batch(5);
-        instruments.record_replicate_batch(8);
         instruments.record_write_batch(3);
 
         // Gauges

multiraft/Cargo.toml

@@ -6,7 +6,7 @@ readme = "README.md"
 version = "0.10.0-alpha.14"
 edition = "2024"
 authors = ["Databend Authors <opensource@datafuselabs.com>"]
-categories = ["network", "asynchronous", "data-structures"]
+categories = ["network-programming", "asynchronous", "data-structures"]
 homepage = "https://github.com/databendlabs/openraft"
 keywords = ["consensus", "raft", "multi-raft"]
 license = "MIT OR Apache-2.0"