Support running open5gs metrics on different platforms

metrics/Dockerfile

@@ -28,11 +28,11 @@ FROM ubuntu:focal
 
 ENV DEBIAN_FRONTEND=noninteractive
 
+ENV PROMETHEUS_VERSION=2.40.2
+
 RUN apt-get update && \
     apt-get install -y wget && \
-    wget -q https://github.com/prometheus/prometheus/releases/download/v2.40.2/prometheus-2.40.2.linux-amd64.tar.gz && \
-    tar xvfz prometheus-2.40.2.linux-amd64.tar.gz
-
-WORKDIR prometheus-2.40.2.linux-amd64
+    wget -q https://github.com/prometheus/prometheus/releases/download/v$PROMETHEUS_VERSION/prometheus-$PROMETHEUS_VERSION.linux-$(dpkg --print-architecture).tar.gz && \
+    tar xvfz prometheus-$PROMETHEUS_VERSION.linux-$(dpkg --print-architecture).tar.gz
 
 CMD /mnt/metrics/metrics_init.sh

metrics/metrics_init.sh

@@ -29,6 +29,9 @@
 # Sync docker time
 #ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 
+export PROMETHEUS_WORK_DIR=prometheus-$PROMETHEUS_VERSION.linux-$(dpkg --print-architecture)
+cd $PROMETHEUS_WORK_DIR
+
 mkdir -p /config
 
 cp /mnt/metrics/prometheus.yml /config/