Fix monitor example by aligning metrics namespace to new default

Signed-off-by: Pavol Loffay <p.loffay@gmail.com>

docker-compose/monitor/README.md

@@ -78,7 +78,7 @@ docker compose up
 - Let the application run for a couple of minutes to ensure there is enough time series data to plot in the dashboard.
 - Navigate to Jaeger UI at http://localhost:16686/ and inspect the Monitor tab. Select `redis` service from the dropdown to see more than one endpoint.
 - To visualize the raw metrics stored on the Prometheus server (for debugging and local development use cases), a Grafana server is included in the docker-compose config, which is preconfigured to read metrics from the Prometheus server.
-  To access Grafana, navigate to http://localhost:3000/, click on the "Explore" and click the "Select metric" dropdown then select `calls_total`, for example.
+  To access Grafana, navigate to http://localhost:3000/, click on the "Explore" and click the "Select metric" dropdown then select `traces_span_metrics_calls_total`, for example.
 
 **Warning:** The included [docker-compose.yml](./docker-compose.yml) file uses the `latest` version of Jaeger and other components. If your local Docker registry already contains older versions, which may still be tagged as `latest`, you may want to delete those images before running the full set, to ensure consistent behavior:
 

docker-compose/monitor/docker-compose.yml

@@ -9,7 +9,6 @@ services:
     environment:
       - METRICS_STORAGE_TYPE=prometheus
       - PROMETHEUS_SERVER_URL=http://prometheus:9090
-      - PROMETHEUS_QUERY_NAMESPACE=${PROMETHEUS_QUERY_NAMESPACE:-}
       - PROMETHEUS_QUERY_DURATION_UNIT=${PROMETHEUS_QUERY_DURATION_UNIT:-}
       - PROMETHEUS_QUERY_NORMALIZE_CALLS=true
       - PROMETHEUS_QUERY_NORMALIZE_DURATION=true
@@ -21,7 +20,7 @@ services:
       backend:
         # This is the host name used in Prometheus scrape configuration.
         aliases: [spm_metrics_source]
-    image: otel/opentelemetry-collector-contrib:${OTEL_IMAGE_TAG:-0.109.0}
+    image: otel/opentelemetry-collector-contrib:${OTEL_IMAGE_TAG:-0.112.0}
     volumes:
       - ${OTEL_CONFIG_SRC:-./otel-collector-config-connector.yml}:/etc/otelcol/otel-collector-config.yml
     command: --config /etc/otelcol/otel-collector-config.yml