Adding new 'db-postgres-hammer' service to stress PostgreSQL DB

docker/docker-compose-manual-binaries.yml

@@ -111,6 +111,22 @@ services:
     networks:
       - simulation
 
+  db-postgres-hammer:
+    ## This service is aimed to mimick other nodes interacting with the same database
+    image: alpine:3.16
+    restart: on-failure
+    logging:
+      driver: "none"
+    volumes:
+      - ./run_database_hammer.sh:/opt/run_database_hammer.sh:Z
+    entrypoint: sh
+    replicas: 3
+    command:
+      - /opt/run_database_hammer.sh
+    depends_on:
+      - nwaku_postgres
+      - nwaku_sqlite
+
   waku-store-query-generator:
     image: ivansete/waku-store-request-maker:19e645
     restart: on-failure

docker/run_database_hammer.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+## This script is aimed to generate traffic to the database and simulate
+## simulate multiple Waku nodes connected to the same database.
+
+## Install the `dig` command
+apk --no-cache add bind-tools
+
+## Install postgresql-client for psql command
+apk --no-cache add postgresql-client
+
+## The port numbers and host names are defined in the 'docker-compose.yml' file
+nwaku-postgres-IP=$(dig +short postgres)
+target-postgres="http://${nwaku-postgres-IP}:5432"
+
+echo "This is publisher: ${target-postgres}; ${target_sqlite}"
+
+query-last-five-minutes="SELECT storedAt, contentTopic, payload, pubsubTopic, version, timestamp, id FROM messages WHERE storedAt >= EXTRACT(EPOCH FROM (NOW() - INTERVAL '5 minutes')) * 1000 ORDER BY storedAt DESC;"
+while true
+do
+  echo "Before making query"
+  psql -h ${nwaku-postgres-IP} -U postgres -W test123 -U postgres -c "${query-last-five-minutes}"
+
+  sleep 10
+done