Upgrade OTel collector to v0.118.0 and re-enable metrics pipeline

The clickhouseexporter v0.117.0 had a nil pointer dereference in
gauge_metrics.go when processing metrics without service.name attribute.
Fixed in opentelemetry-collector-contrib#37034, shipped in v0.118.0.

- Bump all OTel components from v0.117.0 to v0.118.0
- Re-enable metrics pipeline with k8s_cluster receiver → clickhouse
- Set create_schema: true so the exporter creates otel_metrics table

Made-with: Cursor

Author: braghettos

otel-collector-custom/Dockerfile

@@ -4,7 +4,7 @@ RUN apk add --no-cache ca-certificates git
 
 # Install OCB (OpenTelemetry Collector Builder)
 RUN --mount=type=cache,target=/root/.cache/go-build \
-    go install go.opentelemetry.io/collector/cmd/builder@v0.117.0
+    go install go.opentelemetry.io/collector/cmd/builder@v0.118.0
 
 WORKDIR /build
 COPY builder-config.yaml .

otel-collector-custom/builder-config.yaml

@@ -5,23 +5,23 @@ dist:
 
 receivers:
   # K8s events (watch mode) and cluster metrics
-  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/receiver/k8sobjectsreceiver v0.117.0
-  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/receiver/k8sclusterreceiver v0.117.0
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/receiver/k8sobjectsreceiver v0.118.0
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/receiver/k8sclusterreceiver v0.118.0
 
 processors:
   # Core processors
-  - gomod: go.opentelemetry.io/collector/processor/batchprocessor v0.117.0
-  - gomod: go.opentelemetry.io/collector/processor/memorylimiterprocessor v0.117.0
+  - gomod: go.opentelemetry.io/collector/processor/batchprocessor v0.118.0
+  - gomod: go.opentelemetry.io/collector/processor/memorylimiterprocessor v0.118.0
   # Contrib processors
-  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/processor/k8sattributesprocessor v0.117.0
-  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/processor/resourceprocessor v0.117.0
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/processor/k8sattributesprocessor v0.118.0
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/processor/resourceprocessor v0.118.0
   # Custom: resolves krateo.io/composition-id from involvedObject labels
   - gomod: github.com/braghettos/observability-stack/otel-collector-custom/compositionresolver v0.0.1
     path: ./compositionresolver
 
 exporters:
-  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/exporter/clickhouseexporter v0.117.0
-  - gomod: go.opentelemetry.io/collector/exporter/debugexporter v0.117.0
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/exporter/clickhouseexporter v0.118.0
+  - gomod: go.opentelemetry.io/collector/exporter/debugexporter v0.118.0
 
 extensions:
-  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/extension/healthcheckextension v0.117.0
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/extension/healthcheckextension v0.118.0

otel-collector-custom/compositionresolver/go.mod

@@ -3,10 +3,10 @@ module github.com/braghettos/observability-stack/otel-collector-custom/compositi
 go 1.23.0
 
 require (
-	go.opentelemetry.io/collector/component v0.117.0
-	go.opentelemetry.io/collector/consumer v1.23.0
-	go.opentelemetry.io/collector/pdata v1.23.0
-	go.opentelemetry.io/collector/processor v0.117.0
+	go.opentelemetry.io/collector/component v0.118.0
+	go.opentelemetry.io/collector/consumer v1.24.0
+	go.opentelemetry.io/collector/pdata v1.24.0
+	go.opentelemetry.io/collector/processor v0.118.0
 	go.uber.org/zap v1.27.0
 	k8s.io/apimachinery v0.32.0
 	k8s.io/client-go v0.32.0

otel-collectors/deployment.yaml

@@ -129,7 +129,7 @@ config:
       logs_table_name: otel_logs
       traces_table_name: otel_traces
       metrics_table_name: otel_metrics
-      create_schema: false
+      create_schema: true
       timeout: 10s
       retry_on_failure:
         enabled: true
@@ -143,9 +143,10 @@ config:
         receivers: [k8sobjects]
         processors: [memory_limiter, k8sattributes, resource, compositionresolver, batch]
         exporters: [clickhouse]
-      # Metrics pipeline disabled — clickhouseexporter v0.117.0 panics on
-      # gauge metrics with nil attribute values (SIGSEGV in gauge_metrics.go).
-      metrics: null
+      metrics:
+        receivers: [k8s_cluster]
+        processors: [memory_limiter, batch]
+        exporters: [clickhouse]
       traces: null
 
 resources: