写一个复杂的redis巡检脚本

好的，以下是一个复杂的Redis巡检脚本：

#!/bin/bash

# Redis服务主机IP地址
REDIS_HOST="127.0.0.1"

# Redis服务端口号
REDIS_PORT=6379

# Redis认证密码
REDIS_PASSWORD="your_redis_password"

# 巡检结果保存路径
RESULT_FILE="/var/log/redis_inspection.log"

# 巡检时间戳
TIMESTAMP=$(date "+%Y-%m-%d %H:%M:%S")

# Redis客户端命令
REDIS_CLI="redis-cli -h ${REDIS_HOST} -p ${REDIS_PORT} -a ${REDIS_PASSWORD}"

# 检查Redis服务是否正常运行
REDIS_PING=$($REDIS_CLI ping)

if [ "${REDIS_PING}" != "PONG" ]; then
    echo "${TIMESTAMP} Redis server is not running or authentication failed!" >> $RESULT_FILE
    exit 1
fi

# 获取Redis实例信息
REDIS_INFO=$($REDIS_CLI info)

# 检查Redis实例内存使用情况
MEMORY_USED=$(echo "${REDIS_INFO}" | grep "used_memory" | awk -F':' '{print $2}' | tr -d '\r\n')
MEMORY_PEAK=$(echo "${REDIS_INFO}" | grep "used_memory_peak" | awk -F':' '{print $2}' | tr -d '\r\n')

if [ "${MEMORY_USED}" -gt "104857600" ]; then
    echo "${TIMESTAMP} Redis memory usage exceeds 100MB, current usage: ${MEMORY_USED} bytes" >> $RESULT_FILE
fi

if [ "${MEMORY_PEAK}" -gt "104857600" ]; then
    echo "${TIMESTAMP} Redis memory usage peaks exceeds 100MB, current usage: ${MEMORY_PEAK} bytes" >> $RESULT_FILE
fi

# 检查Redis实例连接数
CLIENTS_CONNECTED=$(echo "${REDIS_INFO}" | grep "connected_clients" | awk -F':' '{print $2}' | tr -d '\r\n')

if [ "${CLIENTS_CONNECTED}" -gt "1000" ]; then
    echo "${TIMESTAMP} Redis client connections exceeds 1000, current connections: ${CLIENTS_CONNECTED}" >> $RESULT_FILE
fi

# 检查Redis实例缓存命中率
CACHE_HITS=$(echo "${REDIS_INFO}" | grep "keyspace_hits" | awk -F':' '{print $2}' | tr -d '\r\n')
CACHE_MISSES=$(echo "${REDIS_INFO}" | grep "keyspace_misses" | awk -F':' '{print $2}' | tr -d '\r\n')

if [ "${CACHE_HITS}" -gt "0" ] && [ "${CACHE_MISSES}" -gt "0" ]; then
    CACHE_HIT_RATIO=$(echo "scale=2; ${CACHE_HITS}/(${CACHE_HITS}+${CACHE_MISSES})*100" | bc)
    
    if [ "${CACHE_HIT_RATIO}" -lt "80" ]; then
        echo "${TIMESTAMP} Redis cache hit ratio is less than 80%, current hit ratio: ${CACHE_HIT_RATIO}%" >> $RESULT_FILE
    fi
fi

# 检查Redis实例持久化设置
PERSISTENCE_MODE=$(echo "${REDIS_INFO}" | grep "rdb_last_save_time" | awk -F':' '{print $1}' | awk -F'_' '{print $2}' | tr -d '\r\n')
PERSISTENCE_STATUS=$(echo "${REDIS_INFO}" | grep "rdb_last_bgsave_status" | awk -F':' '{print $2}' | tr -d '\r\n')

if [ "${PERSISTENCE_MODE}" == "seconds" ] && [ "${PERSISTENCE_STATUS}" != "ok" ]; then
    echo "${TIMESTAMP} Redis RDB snapshot failed!" >> $RESULT_FILE
fi

# 巡检完成
echo "${TIMESTAMP} Redis inspection completed!" >> $RESULT_FILE

该脚本可以检查Redis服务是否正常运行、Redis实例内存使用情况、Redis实例连接数、Redis实例缓存命中率以及Redis实例持久化设置等多个方面，帮助运维人员及时发现并解决Redis运行问题。