snapshot of https://github.com/centrifugal/centrifugo.git (master, 2026-09-16; blobs > 131072B omitted)

misc/redis_instances/readme.md

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+Create local N isolated Redis master instances starting from port `6000`:
+
+```
+bash start_instances.sh 3
+```
+
+Redis nodes will work until script interrupted. The goal of having this script is for development and benchmarking.
+
+By default, Redis runs without RDB and AOF (`--save "" --appendonly no`).

misc/redis_instances/start_instances.sh

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+#!/bin/bash
+
+# Function to wait for Redis node to become available
+wait_for_redis() {
+  local port=$1
+  while ! redis-cli -p "$port" ping > /dev/null 2>&1; do
+    echo "Waiting for Redis node on port $port to start..."
+    sleep 1
+  done
+  echo "Redis node on port $port is available."
+}
+
+# Array to hold PIDs of Redis server processes
+declare -a redis_pids
+
+# Function to start Redis nodes
+start_redis_instances() {
+  local masters=$1
+  local base_port=6000
+  local redis_dir="./redis_data"
+  local total_nodes=$((masters * (0 + 1)))
+  local redis_nodes=()
+
+  # Create cluster directory, clean previous.
+  rm -r "$redis_dir"
+  mkdir -p "$redis_dir"
+
+  # Start master nodes
+  for ((i=0; i<masters; i++)); do
+    local port=$((base_port + i))
+    local node_dir="$redis_dir/$port"
+    mkdir -p "$node_dir"
+    pushd "$node_dir" > /dev/null
+
+    redis-server --port "$port" \
+                 --save "" --appendonly no \
+                 --appendfilename "appendonly.aof" \
+                 --dbfilename "dump.rdb" \
+                 --logfile "redis.log" &
+    redis_pids[i]=$!
+    popd > /dev/null
+    redis_nodes+=("127.0.0.1:$port")
+  done
+
+  # Wait for all nodes to become available
+  for port in "${redis_nodes[@]}"; do
+    wait_for_redis "${port##*:}"
+  done
+}
+
+# Function to shut down Redis nodes
+shutdown_redis_instances() {
+  echo "Shutting down Redis nodes..."
+  for pid in "${redis_pids[@]}"; do
+    kill "$pid"
+  done
+}
+
+# Trap Ctrl+C (SIGINT) to call shutdown function
+trap shutdown_redis_instances SIGINT
+
+# Check if the number of masters and replicas is provided
+if [ -z "$1" ]; then
+  echo "Usage: $0 <number_of_masters>"
+  exit 1
+fi
+
+# Start Redis instances
+start_redis_instances "$1"
+
+# Wait until a keyboard interrupt (Ctrl+C) is detected
+echo "Redis instances are running. Press Ctrl+C to stop."
+wait
+
+# The script will wait at the above line until the user presses Ctrl+C, which will trigger the shutdown function