Redis 备忘

#!/bin/bash
# usage: ./redis-cluster-del.sh 'prefix:*'
REDIS_CLI=${REDIS_CLI:-redis-cli}
PATTERN=$1
MASTER_HOST=${MASTER_HOST:-127.0.0.1}
MASTER_PORT=${MASTER_PORT:-7000}
PASSWORD=${PASSWORD:-}

if [ -z "$PATTERN" ]; then
  echo "usage: $0 <pattern>"
  exit 1
fi

AUTH=()
[ -n "$PASSWORD" ] && AUTH=(-a "$PASSWORD")

echo "1. list master nodes"
HOST_PORTS=$("$REDIS_CLI" -c -h "$MASTER_HOST" -p "$MASTER_PORT" "${AUTH[@]}" \
  cluster nodes | grep master | awk '{print $2}' | awk -F@ '{print $1}')

echo "2. scan & del pattern=$PATTERN"
for node in $HOST_PORTS; do
  ip=${node%%:*}
  port=${node##*:}
  echo "node $ip:$port"
  # 简化：单次 SCAN；量大应循环 cursor 直至 0
  keys=$("$REDIS_CLI" -h "$ip" -p "$port" "${AUTH[@]}" \
    scan 0 match "$PATTERN" count 6000 | awk 'NR>1')
  for key in $keys; do
    echo "DEL $key"
    "$REDIS_CLI" -c -h "$ip" -p "$port" "${AUTH[@]}" del "$key"
    sleep 0.05
  done
done
echo "done"