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### 一、下载$JDK17$
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```shell
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# 下载wget
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yum install wget -y
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# 进入工作目录
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cd /usr/local
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# 下载文件
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wget https://download.oracle.com/java/17/archive/jdk-17.0.10_linux-x64_bin.tar.gz
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# 解压+移动
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tar -xzvf jdk-17.0.10_linux-x64_bin.tar.gz && mv jdk-17.0.10 /usr/local/jdk17 && rm -rf jdk-17.0.10_linux-x64_bin.tar.gz
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# 配置
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echo 'export JAVA_HOME=/usr/local/jdk17' | sudo tee -a /etc/profile && \
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echo 'export PATH=$JAVA_HOME/bin:$PATH' | sudo tee -a /etc/profile
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source /etc/profile
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# 检查
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java -version 2>&1 | grep "17.0.10"
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```
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### 二、系统检查
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**关闭 $swap$ 分区**
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```shell
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# 临时关闭
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swapoff -a
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# 永久关闭
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sed -i '/swap/s/^/#/' /etc/fstab
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```
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**关闭防火墙**
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```shell
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systemctl stop firewalld
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systemctl disable firewalld
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systemctl status firewalld
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```
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**配置 $chrony$ 服务**
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```shell
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# 安装与启动
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dnf install -y chrony
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systemctl enable --now chronyd
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vi /etc/chrony.conf
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# 添加内容
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server ntp.aliyun.com iburst
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server time.cloudflare.com iburst
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# chrony验证
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timedatectl status
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chronyc tracking | grep "Leap status"
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```
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**设置系统最大打开文件句柄数**
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```shell
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# 临时生效
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ulimit -n 65535
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# 永久生效
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vi /etc/security/limits.conf
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# 增加以下内容
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* soft nofile 1048576
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* hard nofile 1048576
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* soft nproc 65535
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* hard nproc 65535
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root soft nofile 1048576
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root hard nofile 1048576
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```
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**修改虚拟内存区域数量为**
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```shell
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sysctl -w vm.max_map_count=2000000
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```
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**关闭透明大页**
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```shell
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echo never > /sys/kernel/mm/transparent_hugepage/enabled
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echo never > /sys/kernel/mm/transparent_hugepage/defrag
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```
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**执行生效**
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```
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sysctl -p
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```
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## 三、部署$doris$
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**1、解压安装包**
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```shell
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cd /usr/local
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# 下载
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wget https://apache-doris-releases.oss-accelerate.aliyuncs.com/apache-doris-3.0.5-bin-x64.tar.gz
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# 解压
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tar -xzvf apache-doris-3.0.5-bin-x64.tar.gz
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# 迁移目录
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mv apache-doris-3.0.5-bin-x64 doris && rm -rf apache-doris-3.0.5-bin-x64.tar.gz
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```
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**2、部署$FE$**
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```shell
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# 创建目录
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mkdir -p /usr/local/doris/doris-meta
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mkdir -p /usr/local/doris/doris-storage
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```
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修改$FE$配置文件
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```shell
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vi /usr/local/doris/fe/conf/fe.conf
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# 增加内容
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JAVA_HOME=/usr/local/jdk17
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#网段按照实际情况，如服务器的IP是10.10.14.250，那么网关就是10.10.14.0
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priority_networks = 10.10.14.0/24
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#元数据存储目录
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meta_dir = /usr/local/doris/doris-meta
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```
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**3、启动$FE$**
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```shell
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# 加上--daemon 后台启动
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/usr/local/doris/fe/bin/start_fe.sh --daemon
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```
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> **备注**：
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```shell
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# 如果有问题，到下面的路径查看日志
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/usr/local/doris/fe/log
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```
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**4、验证 $FE$ 状态**
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```shell
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# 安装MySQL客户端核心组件
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dnf install mysql -y
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# 验证安装
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mysql --version # 查看版本信息
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# 通过 MySQL 客户端连接 看是否能连接成功
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mysql -h 127.0.0.1 -P 9030 -uroot
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```
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**5、部署$BE$**
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```shell
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# 增加配置信息
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vi /usr/local/doris/be/conf/be.conf
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JAVA_HOME=/usr/local/jdk17
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priority_networks = 10.10.14.0/24
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storage_root_path = /usr/local/doris/doris-storage
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```
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**6、启动$BE$**
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```shell
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# 后台启动命令
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/usr/local/doris/be/bin/start_be.sh --daemon
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```
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## 四、集群管理
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**1、将$BE$添加到$FE$**
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```shell
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# 使用 MySQL 客户端连接 FE
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mysql -h 127.0.0.1 -P 9030 -uroot
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# 添加 BE 节点
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ALTER SYSTEM ADD BACKEND "127.0.0.1:9050";
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# 修改密码
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SET PASSWORD FOR 'root' = PASSWORD('DsideaL147258369');
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```
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**2、验证节点状态**
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```shell
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SHOW PROC '/backends'\G
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-- 检查 `Alive` 字段为 `true`
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```
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**3、创建数据库**
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```sql
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create database yltcharge;
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```
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### 五、参考文档
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[单机安装及部署Doris3.0.2（最新最全超级详细图文解说）](https://blog.csdn.net/weixin_36467887/article/details/146401005)
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### 六、配置$CDC$需要$JDK21$
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```shell
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# 进入工作目录
|
|
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cd /usr/local
|
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# 下载文件
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wget https://download.oracle.com/java/21/archive/jdk-21.0.7_linux-x64_bin.tar.gz
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# 解压+移动
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tar -xzvf jdk-21.0.7_linux-x64_bin.tar.gz && mv jdk-21.0.7 /usr/local/jdk21 && rm -rf jdk-21.0.7_linux-x64_bin.tar.gz
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```
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