allow configuring remove write endpoint

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

tests/benchmark/docker-compose.yml

@@ -2,6 +2,7 @@
 services:
   prometheus:
     image: quay.io/prometheus/prometheus:latest
+    restart: unless-stopped
     command:
       - --enable-feature=native-histograms
       - --web.enable-remote-write-receiver
@@ -18,6 +19,7 @@ services:
 
   grafana:
     image: grafana/grafana:latest
+    restart: unless-stopped
     environment:
       GF_AUTH_ANONYMOUS_ENABLED: "true"
       GF_AUTH_ANONYMOUS_ORG_ROLE: Admin

tests/benchmark/run.sh

@@ -7,7 +7,7 @@ BASE_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &> /dev/null && pwd)"
 function _k6 {
     local filename="${1}"
 
-    K6_PROMETHEUS_RW_SERVER_URL=http://localhost:9090/api/v1/write \
+    K6_PROMETHEUS_RW_SERVER_URL=${PROMETHEUS_REMOVE_WRITE_ENDPOINT:-http://localhost:9090/api/v1/write} \
     K6_PROMETHEUS_RW_TREND_AS_NATIVE_HISTOGRAM=true \
     K6_PROMETHEUS_RW_PUSH_INTERVAL=1s \
     k6 run \