CentOS7 上安装和配置ClickHouse（centos7安装keepalived）

1 ClickHouse在Centos上安装安装
1.1 基于脚本的安装
1.1.1 确保curl已安装在系统上

sudo yum install -y curl

1.1.2 让我们下载并运行packagecloud.io提供的安装shell脚本

curl -s https://packagecloud.io/install/repositories/altinity/clickhouse/script.rpm.sh | sudo bash

1.1.3 检查是否有可用于安装的ClickHouse软件包

sudo yum list 'clickhouse*'

ClickHouse包应该列为可用，如下所示：

Available Packages
clickhouse-client.x86_64 18.1.0-1.el7 Altinity_clickhouse
clickhouse-common-static.x86_64 18.1.0-1.el7 Altinity_clickhouse
clickhouse-compressor.x86_64 1.1.54336-3.el7 Altinity_clickhouse
clickhouse-debuginfo.x86_64 18.1.0-1.el7 Altinity_clickhouse
clickhouse-mysql.noarch 0.0.20180319-1 Altinity_clickhouse
clickhouse-server.x86_64 18.1.0-1.el7 Altinity_clickhouse
clickhouse-server-common.x86_64 18.1.0-1.el7 Altinity_clickhouse
clickhouse-test.x86_64 18.1.0-1.el7 Altinity_clickhouse

有多个软件包可用（新版本和旧工具），其中一些已经弃用，因此无需安装所有可用的RPM。

1.1.4 现在让我们安装ClickHouse主要部件 - 服务器和客户端应用程序。

sudo yum install -y clickhouse-server clickhouse-client

1.1.5 并验证它是否已列为已安装

sudo yum list installed 'clickhouse*'

ClickHouse包应该列为已安装，如下所示：

Installed Packages
clickhouse-client.x86_64 18.1.0-1.el7 @Altinity_clickhouse
clickhouse-common-static.x86_64 18.1.0-1.el7 @Altinity_clickhouse
clickhouse-server.x86_64 18.1.0-1.el7 @Altinity_clickhouse
clickhouse-server-common.x86_64 18.1.0-1.el7 @Altinity_clickhouse

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1.2 通过下载rpm包进行安装
1.2.1 下载rpm安装包
wget --content-disposition https://packagecloud.io/Altinity/clickhouse/packages/el/6/clickhouse-server-common-19.3.6-1.el6.x86_64.rpm/download.rpm
wget --content-disposition https://packagecloud.io/Altinity/clickhouse/packages/el/6/clickhouse-server-19.3.6-1.el6.x86_64.rpm/download.rpm
wget --content-disposition https://packagecloud.io/Altinity/clickhouse/packages/el/6/clickhouse-common-static-19.3.6-1.el6.x86_64.rpm/download.rpm
wget --content-disposition https://packagecloud.io/Altinity/clickhouse/packages/el/6/clickhouse-client-19.3.6-1.el6.x86_64.rpm/download.rpm

1.2.2 使用yum命令分别对上面下载的rpm包进行安装
sudo yum install cliclhouse-*

rpm -ivh *.rpm --force --nodeps

2 配置
修改配置文件

sudo vim /etc/clickhouse-server/config.xml

2.1 修改log路径
<log>/data/clickhouse/log/clickhouse-server/clickhouse-server.log</log>
<errorlog>/data/clickhouse/log/clickhouse-server/clickhouse-server.err.log</errorlog>

2.2 修改数据路径
<!-- Path to data directory, with trailing slash. -->
<path>/data/clickhouse/</path>

<!-- Path to temporary data for processing hard queries. -->
<tmp_path>/data/clickhouse/tmp/</tmp_path>

<!-- Directory with user provided files that are accessible by 'file' table function. -->
<user_files_path>/data/clickhouse/user_files/</user_files_path>

3 启动
3.1 运行服务

sudo service clickhouse-server start

可以在/var/log/clickhouse-server/目录中查看日志。
如果服务没有启动，请检查配置文件 /etc/clickhouse-server/config.xml。
你也可以在控制台中直接启动服务：

clickhouse-server --config-file=/etc/clickhouse-server/config.xml

启动： systemctl start clickhouse-server.service
或 sudo -u clickhouse clickhouse-server --config-file=/etc/clickhouse-server/config.xml


3.1 客户端连接服务

clickhouse-client

默认情况下它使用‘default’用户无密码的与localhost:9000服务建立连接。 客户端也可以用于连接远程服务，例如：

clickhouse-client --host=example.com