机器环境配置

三台 centos 机器, 部署 1分片3副本 clickhouse 集群

10.82.46.135
10.82.46.163
10.82.46.218

每一台都要配置

1. 关闭selinux
sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/configsetenforce 02. 关闭防火墙
systemctl stop firewalld.service #停止firewallsystemctl disable firewalld.service #禁止firewall开机启动systemctl mask firewalldsystemctl stop firewalldyum remove firewalld3. 配置系统打开文件数限制
vi  /etc/security/limits.conf #文件句柄数量的配置* soft nofile 65536* hard nofile 65536* soft nproc 131072* hard nproc 131072vi /etc/security/limits.d/20-nproc.conf* soft nofile 65536* hard nofile 65536* soft nproc 131072* hard nproc 131072

安装 JDK 8

每一台都要安装 JDK

yum install java-1.8.0-openjdk.x86_64 java-1.8.0-openjdk-devel.x86_64vi /etc/profileexport JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.412.b08-1.el7_9.x86_64
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/binsource /etc/profileecho $JAVA_HOME
echo $CLASSPATH
echo $PATH

安装 zookeeper

zookeeper默认使用2181端口，集群模式还会用到2888、3888端口，建议zookeeper部署在内网环境中，服务器上关闭防火墙，分别在三台服务器上操作。

wget https://archive.apache.org/dist/zookeeper/zookeeper-3.7.1/apache-zookeeper-3.7.1-bin.tar.gz
tar -zxvf apache-zookeeper-3.7.1-bin.tar.gz -C /usr/local/
cd /usr/local/apache-zookeeper-3.7.1-bin/
cp conf/zoo_sample.cfg conf/zoo.cfgmkdir -p /data/zookeepervim conf/zoo.cfg# 默认端口 8080 可能被占用
admin.serverPort=8888
# zookeeper 数据存储地址
dataDir=/data/zookeeper
# zookeeper 集群地址
server.1=10.82.46.135:2888:3888
server.2=10.82.46.163:2888:3888
server.3=10.82.46.218:2888:3888# 三台机 id
touch /data/zookeeper/myid
echo 1 > /data/zookeeper/myid
echo 2 > /data/zookeeper/myid
echo 3 > /data/zookeeper/myidexport ZK_HOME=/usr/local/apache-zookeeper-3.7.1-bin# 启动
./bin/zkServer.sh start# 查看日志
tail -f logs/zookeeper-root-server-iov-bigdata-autodrive-prod01.out# 停止
./bin/zkServer.sh stop# 查看状态
./bin/zkServer.sh status

Clickhouse 集群安装

rpm 包离线安装

1. 安装依赖包
yum install -y libtool *unixODBC*2. 分别下载client，static，static-dbg，keeper-dbg和server五个安装包，五个包的版本要一致，这里以23.3.2.37版本为例，把下载的五个包放到/usr/local/src 目录下。
wget https://packages.clickhouse.com/rpm/stable/clickhouse-client-23.3.2.37.x86_64.rpmwget https://packages.clickhouse.com/rpm/stable/clickhouse-common-static-23.3.2.37.x86_64.rpmwget https://packages.clickhouse.com/rpm/stable/clickhouse-server-23.3.2.37.x86_64.rpm3. 执行安装，如果说我们的机器上有旧版本的 clickhouse，该命令会将旧版本升级为我们当前安装的版本，期间会为我们创建一个 default 用户，我们需要输入default 密码
rpm -Uvh --replacepkgs clickhouse-common-static-23.3.2.37.x86_64.rpm clickhouse-client-23.3.2.37.x86_64.rpm clickhouse-server-23.3.2.37.x86_64.rpm

目录说明

• /etc/clickhouse-server：服务端的配置文件目录，包括全局配置config.xml和用户配置users.xml等
• /etc/clickhouse-client：客户端配置，包括conf.d文件夹和config.xml文件
• /var/lib/clickhouse：默认的数据存储目录，建议修改路径到大容量磁盘
• /var/log/clickhouse-server：默认保存日志的目录，建议修改路径到大容量磁盘

新建存储目录

mkdir -p /data/clickhouse #数据存储目录mkdir -p /data/clickhouse/log #日志存放目录修改目录权限：chown clickhouse:clickhouse /data/clickhouse -Rchown clickhouse:clickhouse /data/clickhouse/log -Rchmod 755 /data/clickhouse -Rchmod 755 /data/clickhouse/log -R

设置数据库密码，默认用户名是：default

cp /etc/clickhouse-server/users.xml /etc/clickhouse-server/users.xml.bakvi /etc/clickhouse-server/users.xml<password>123456</password>:wq! #保存退出

修改全局配置

修改3台服务器ClickHouse配置文件 /etc/clickhouse-server/config.xml

cp /etc/clickhouse-server/config.xml /etc/clickhouse-server/config.xml.bak  #备份

修改全局配置信息
vi /etc/clickhouse-server/config.xml

<timezone>Asia/Shanghai</timezone> <!-- #修改时区 --><listen_host>::</listen_host> <!-- #开启外部访问 --><path>/data/clickhouse/</path> <!-- #修改数据存放路径，默认是<path>/var/lib/clickhouse</path> --><level>information</level>   <!-- # 默认 trace --><log>/data/clickhouse/log/clickhouse-server.log</log><errorlog>/data/clickhouse/log/clickhouse-server.err.log</errorlog><size>1000M</size><count>10</count><!-- <max_open_files>1048576</max_open_files> #文件句柄数量的配置 --><http_port>8123</http_port> <!-- #http默认端口 --><tcp_port>9000</tcp_port> <!-- #tcp默认端口 --><max_concurrent_queries>4096</max_concurrent_queries>  <!-- #限制的是活跃查询的数量，是对正在执行或排队等待执行的查询进行限制 --><max_connections>4096</max_connections> <!-- #限制的是客户端连接的数量，是对同时与 ClickHouse 建立的连接进行限制 -->:wq! #保存退出

zookeeper配置

zookeeper 不一定要和ck的节点安装在同一台机器上，只要ck的节点能够访问zk即可。

<zookeeper><node><host>10.82.46.135</host><port>2181</port></node><node><host>10.82.46.163</host><port>2181</port></node><node><host>10.82.46.218</host><port>2181</port></node></zookeeper>

Shard和Replica设置

这里使用 1分片3副本演示

<perftest_1shards_3replicas>   <!-- #分片名称，自定义 --><shard><internal_replication>true</internal_replication>  <!--#只写一个副本，其他副本通过zookeeper进行同步，保证数据一致性 --><replica><host>10.82.46.135</host><port>9000</port></replica><replica><host>10.82.46.163</host><port>9000</port></replica><replica><host>10.82.46.218</host><port>9000</port></replica></shard>
</perftest_1shards_3replicas>

添加macros配置

<macros><!-- #分片号3个节点都一样 --><shard>01</shard>   <!-- #副本名称，3个节点不能相同，填写各自的ip地址 --><replica>10.82.46.135</replica>  <!-- <replica>10.82.46.163</replica> --><!-- <replica>10.82.46.218</replica> -->
</macros>

启动 clickhouse

启动命令

systemctl start clickhouse-serversystemctl status clickhouse-serversystemctl stop clickhouse-serversystemctl restart clickhouse-serversystemctl enable clickhouse-server

启动 10.82.46.135 clickhouse server

进入 local 数据库控制台，查看集群（perftest_1shards_3replicas）信息，密码就是 rpm 安装的时候输入的密码：

clickhouse-client --host 10.82.46.135 --port=9000select * from system.clusters where cluster = 'perftest_1shards_3replicas';SELECT * FROM system.zookeeper WHERE path = '/clickhouse';select * from system.macros;

启动 10.82.46.163 clickhouse server

进入 local 数据库控制台，查看集群（perftest_1shards_3replicas）信息，密码就是 rpm 安装的时候输入的密码：

clickhouse-client --host 10.82.46.163 --port=9000select * from system.clusters where cluster = 'perftest_1shards_3replicas';SELECT * FROM system.zookeeper WHERE path = '/clickhouse';select * from system.macros;

启动 10.82.46.218 clickhouse server

进入 local 数据库控制台，查看集群（perftest_1shards_3replicas）信息，密码就是 rpm 安装的时候输入的密码：

clickhouse-client --host 10.82.46.218 --port=9000select * from system.clusters where cluster = 'perftest_1shards_3replicas';SELECT * FROM system.zookeeper WHERE path = '/clickhouse';select * from system.macros;

验证

创建集群数据库

在一台机器上执行创建命令：

CREATE DATABASE db_test_01 ON CLUSTER perftest_1shards_3replicas;

集群安装正常的话，在其他两台机器上 show databases;应该也可以看到这个数据库：

创建表并写入数据

在其中一台机器上执行：

# 创建集群表
CREATE TABLE db_test_01.tb_test_01 ON CLUSTER 'perftest_1shards_3replicas'
(`id` Int64,`p` Int16
)
ENGINE = ReplicatedMergeTree( '/clickhouse/tables/{shard}/tb_test_01', '{replica}')
PARTITION BY p
ORDER BY id;# 写入数据
INSERT INTO db_test_01.tb_test_01 VALUES(111,111);INSERT INTO db_test_01.tb_test_01 VALUES(222,222);INSERT INTO db_test_01.tb_test_01 VALUES(333,333);INSERT INTO db_test_01.tb_test_01 VALUES(444,444);

在其他节点上查看数据：

select * from db_test_01.tb_test_01;

验证集群高可用

关闭其中一个节点(10.82.46.135)，模拟节点宕机，在另外的节点上写入数据：
systemctl stop clickhouse-server
在另外的节点上写入数据：

INSERT INTO db_test_01.tb_test_01 VALUES(555,555);

重新启动节点(10.82.46.135)，查看数据表，发现数据已经同步过来，验证成功：

systemctl start clickhouse-serverclickhouse-client --host 10.82.46.135 --port=9000select * from db_test_01.tb_test_01;

删库跑路

drop database db_test_01 on cluster perftest_1shards_3replicas;