添加自定义命令 UserParameter 到 zabbix-agent 配置文件目录，以及获取 info config 等生成 json 格式的脚本：

# 自定义 UserParameter 
cat > /etc/zabbix/zabbix_agentd.d/userparameter_redis.conf<<'EOF'
UserParameter=redis.config[*],bash /etc/zabbix/zabbix_agentd.d/redis_get_info.sh config
UserParameter=redis.info[*],bash /etc/zabbix/zabbix_agentd.d/redis_get_info.sh info
UserParameter=redis.ping[*],bash /etc/zabbix/zabbix_agentd.d/redis_get_info.sh ping
UserParameter=redis.slowlog.count[*],bash /etc/zabbix/zabbix_agentd.d/redis_get_info.sh slowlog_count
EOF
# 获取上方内容的脚本
cat > /etc/zabbix/zabbix_agent.d/redis_get_info.sh<<'EOF'
#!/bin/bash
which redis-cli >/dev/null 2>&1 || (echo 'no redis-cli'; exit 1)
BIN="redis-cli"
redisConf="/etc/redis.conf"
if grep -qw port "$redisConf";then
    port=$(awk '$1=="port" {print $2}' "$redisConf")
else
    port=6379
fi
BIN="$BIN -p $port"
if grep -qw requirepass "$redisConf";then
    pass=$(awk '$1=="requirepass" {print $2}' "$redisConf")
    BIN="$BIN -a $pass"
fi
case "$1" in
    "ping")
        $BIN ping | grep -cw 'PONG'
        ;;
    "info")
        echo '{'
        BEGIN1=0
        while read -r line;do
            if echo "$line" | grep -q '^#';then
                outline="$(echo "$line" | awk '{print " },\""$2"\":{"}')"
                if [ "$BEGIN1" == "0" ];then
                    outline=" ${outline#*,}"
                fi
                BEGIN1=1
                echo "$outline"
            BEGIN2=0
            else
                if echo $line | grep -q ',expires=';then
                    echo "$line" | awk -F':' '{print "  \""$1"\":{"}'
                    BEGIN3=0
                    for keys in $(echo "$line" | awk -F':' '{print $2}' | sed 's#,# #g');do
                        outline="$(echo "$keys" | awk -F'=' '{print "   ,\""$1"\":\""$2"\""}')"
                        if [ "$BEGIN3" == "0" ];then
                            outline="   ${outline#*,}"
                        fi
                        BEGIN3=1
                        echo "$outline"
                    done
                    echo '  }'
                else
                    outline="$(echo "$line" | awk -F':' '{print "  ,\""$1"\":\""$2"\""}')"
                    if [ "$BEGIN2" == "0" ];then
                        outline="   ${outline#*,}"
                    fi
                echo "$outline"
                fi
                BEGIN2=1
            fi
        done<<<"$($BIN info | tr -d '\r' | grep -v '^$')"
        echo -e ' }\n}'
        ;;
    "config")
        BEGIN=0
        echo '{'
        while read -r line;do
            ((num+=1))
            if [ "$(( num % 2 ))" == "1" ];then
                outline=$(echo $line | awk '{print " ,\""$0"\":"}')
                if [ "$BEGIN" == "0" ];then
                    outline=" ${outline#*,}"
                fi
                BEGIN=1
            else
                echo "${outline}$(echo $line | awk '{print "\""$0"\""}')"
            fi
        done<<<"$(echo 'config get *' | $BIN | tr -d '\r')"
        echo '}'
        ;;
    "slowlog_count")
        $BIN slowlog len | tr -d '\r'
        ;;
    *)
        echo "usage: bash ${0##*/} [ping|info|config|slowlog_count]"
        ;;
esac
EOF
# 重启 zabbix-agent
systemctl restart zabbix-agent