chore: adding docker compose prometheus scrapes for primaries. (Myste…

…nLabs/narwhal#425)

* fix: cleaned up how last image is produced for smaller size

Using the rust:1.60-slim-bullseye is about 1.4G on linux.
Just using debian:bullseye-slim is 160Mb.

* chore: adding narwhal primary prom scrape configs

narwhal/Docker/Dockerfile

@@ -81,14 +81,10 @@ RUN cargo build --${BUILD_MODE} --all-features --bin node
 #################################################################
 
 # Creat another layer so we can re-use caching
-FROM rust:1.60-slim-bullseye
+FROM debian:bullseye-slim
 ARG BUILD_MODE
 WORKDIR "$WORKDIR/narwhal"
 
-RUN apt-get update \
-    && apt-get install -y --no-install-recommends libssl1.1 iputils-ping telnet curl \
-    && rm -rf /var/lib/apt/lists/*
-
 # Copy the Narwhal node binary to bin folder
 COPY --from=builder narwhal/target/${BUILD_MODE}/node bin/
 

narwhal/Docker/gen.validators.sh

@@ -128,3 +128,17 @@ EOF
 ./scripts/gen.committee.py -n ${num} -d ${target} > ${target}/committee.json
 
 cp -r templates/{grafana,prometheus} ${target}/
+
+# add the primary and worker nodes to the prometheus.yaml scrape configs.
+t=$(($num - 1))
+for i in $(seq -f %02g 0 ${t})
+do
+    scrape="primary_${i}:8010"
+    cat >> ${target}/prometheus/prometheus.yml <<EOF
+
+  - job_name: 'primary_${i}'
+    scrape_interval: 10s
+    static_configs:
+      - targets: ['${scrape}']
+EOF
+done