背景：
初始集群使用的安装包是altinity提供
clickhouse-client-20.8.3.18-1.el7.x86_64.rpm
clickhouse-common-static-20.8.3.18-1.el7.x86_64.rpm
clickhouse-server-20.8.3.18-1.el7.x86_64.rpm
clickhouse-server-common-20.8.3.18-1.el7.x86_64.rpm
现在使用clickhouse官方包进行升级
1、准备安装包，放入自建的ck-21.9目录
clickhouse-client-21.9.4.35-2.noarch.rpm
clickhouse-common-static-21.9.4.35-2.x86_64.rpm
clickhouse-server-21.9.4.35-2.noarch.rpm
2、备份配置文件
/etc/clickhouse-server目录每个节点整体备份，虽然升级版本会新增配置users.xml.rpmnew，config.xml.rpmnew，不会覆盖，但是保守起见，备份。
数据文件也可以备份，默认目录/var/lib/clickhouse
3、停止服务
service stop clickhouse-server，注意不是systemctl start clickhouse-server，这个命令无法真正停止服务。
验证是否停止
ps -ef | grep clickhouse-server
4、升级
1、进入ck-21.9目录，执行命令yum upgrade *.rpm -y
已加载插件：fastestmirror
正在检查 clickhouse-client-21.9.4.35-2.noarch.rpm: clickhouse-client-21.9.4.35-2.noarch
clickhouse-client-21.9.4.35-2.noarch.rpm 将作为 clickhouse-client-20.8.3.18-1.el7.x86_64 的更新
正在检查 clickhouse-common-static-21.9.4.35-2.x86_64.rpm: clickhouse-common-static-21.9.4.35-2.x86_64
clickhouse-common-static-21.9.4.35-2.x86_64.rpm 将作为 clickhouse-common-static-20.8.3.18-1.el7.x86_64 的更新
正在检查 clickhouse-server-21.9.4.35-2.noarch.rpm: clickhouse-server-21.9.4.35-2.noarch
clickhouse-server-21.9.4.35-2.noarch.rpm 将作为 clickhouse-server-20.8.3.18-1.el7.x86_64 的更新
正在解决依赖关系
--> 正在检查事务
---> 软件包 clickhouse-client.x86_64.0.20.8.3.18-1.el7 将被 升级
---> 软件包 clickhouse-client.noarch.0.21.9.4.35-2 将被 更新
---> 软件包 clickhouse-common-static.x86_64.0.20.8.3.18-1.el7 将被 升级
---> 软件包 clickhouse-common-static.x86_64.0.21.9.4.35-2 将被 更新
---> 软件包 clickhouse-server.x86_64.0.20.8.3.18-1.el7 将被 升级
---> 软件包 clickhouse-server.noarch.0.21.9.4.35-2 将被 舍弃
---> 软件包 clickhouse-server-common.x86_64.0.20.8.3.18-1.el7 将被 取代
--> 解决依赖关系完成
依赖关系解决
=========================================================================================================================================================================================================================================
Package 架构 版本 源 大小
=========================================================================================================================================================================================================================================
正在安装:
clickhouse-server noarch 21.9.4.35-2 /clickhouse-server-21.9.4.35-2.noarch 156 k
替换 clickhouse-server-common.x86_64 20.8.3.18-1.el7
正在更新:
clickhouse-client noarch 21.9.4.35-2 /clickhouse-client-21.9.4.35-2.noarch 88 k
clickhouse-common-static x86_64 21.9.4.35-2 /clickhouse-common-static-21.9.4.35-2.x86_64 580 M
事务概要
=========================================================================================================================================================================================================================================
安装 1 软件包
升级 2 软件包
总计：580 M
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
警告：RPM 数据库已被非 yum 程序修改。
正在更新 : clickhouse-common-static-21.9.4.35-2.x86_64 1/7
正在安装 : clickhouse-server-21.9.4.35-2.noarch 2/7
警告：/etc/clickhouse-server/config.xml 已建立为 /etc/clickhouse-server/config.xml.rpmnew
警告：/etc/clickhouse-server/users.xml 已建立为 /etc/clickhouse-server/users.xml.rpmnew
groupadd：“clickhouse”组已存在
useradd：用户“clickhouse”已存在
ClickHouse binary is already located at /usr/bin/clickhouse
Symlink /usr/bin/clickhouse-server already exists but it points to /clickhouse. Will replace the old symlink to /usr/bin/clickhouse.
Creating symlink /usr/bin/clickhouse-server to /usr/bin/clickhouse.
Symlink /usr/bin/clickhouse-client already exists but it points to /clickhouse. Will replace the old symlink to /usr/bin/clickhouse.
Creating symlink /usr/bin/clickhouse-client to /usr/bin/clickhouse.
Symlink /usr/bin/clickhouse-local already exists but it points to /clickhouse. Will replace the old symlink to /usr/bin/clickhouse.
Creating symlink /usr/bin/clickhouse-local to /usr/bin/clickhouse.
Symlink /usr/bin/clickhouse-benchmark already exists but it points to /clickhouse. Will replace the old symlink to /usr/bin/clickhouse.
Creating symlink /usr/bin/clickhouse-benchmark to /usr/bin/clickhouse.
Symlink /usr/bin/clickhouse-copier already exists but it points to /clickhouse. Will replace the old symlink to /usr/bin/clickhouse.
Creating symlink /usr/bin/clickhouse-copier to /usr/bin/clickhouse.
Symlink /usr/bin/clickhouse-obfuscator already exists but it points to /clickhouse. Will replace the old symlink to /usr/bin/clickhouse.
Creating symlink /usr/bin/clickhouse-obfuscator to /usr/bin/clickhouse.
Creating symlink /usr/bin/clickhouse-git-import to /usr/bin/clickhouse.
Symlink /usr/bin/clickhouse-compressor already exists but it points to /clickhouse. Will replace the old symlink to /usr/bin/clickhouse.
Creating symlink /usr/bin/clickhouse-compressor to /usr/bin/clickhouse.
Symlink /usr/bin/clickhouse-format already exists but it points to /clickhouse. Will replace the old symlink to /usr/bin/clickhouse.
Creating symlink /usr/bin/clickhouse-format to /usr/bin/clickhouse.
Symlink /usr/bin/clickhouse-extract-from-config already exists but it points to /clickhouse. Will replace the old symlink to /usr/bin/clickhouse.
Creating symlink /usr/bin/clickhouse-extract-from-config to /usr/bin/clickhouse.
Creating clickhouse group if it does not exist.
groupadd -r clickhouse
Creating clickhouse user if it does not exist.
useradd -r --shell /bin/false --home-dir /nonexistent -g clickhouse clickhouse
Will set ulimits for clickhouse user in /etc/security/limits.d/clickhouse.conf.
Creating config directory /etc/clickhouse-server/config.d that is used for tweaks of main server configuration.
Creating config directory /etc/clickhouse-server/users.d that is used for tweaks of users configuration.
Config file /etc/clickhouse-server/config.xml already exists, will keep it and extract path info from it.
/etc/clickhouse-server/config.xml has /var/lib/clickhouse/ as data path.
/etc/clickhouse-server/config.xml has /var/log/clickhouse-server/ as log path.
Users config file /etc/clickhouse-server/users.xml already exists, will keep it and extract users info from it.
chown --recursive clickhouse:clickhouse '/etc/clickhouse-server'
Log directory /var/log/clickhouse-server/ already exists.
Data directory /var/lib/clickhouse/ already exists.
Pid directory /var/run/clickhouse-server already exists.
chown --recursive clickhouse:clickhouse '/var/log/clickhouse-server/'
chown --recursive clickhouse:clickhouse '/var/run/clickhouse-server'
chown clickhouse:clickhouse '/var/lib/clickhouse/'
groupadd -r clickhouse-bridge
useradd -r --shell /bin/false --home-dir /nonexistent -g clickhouse-bridge clickhouse-bridge
chown --recursive clickhouse-bridge:clickhouse-bridge '/usr/bin/clickhouse-odbc-bridge'
chown --recursive clickhouse-bridge:clickhouse-bridge '/usr/bin/clickhouse-library-bridge'
Password for default user is empty string. See /etc/clickhouse-server/users.xml and /etc/clickhouse-server/users.d to change it.
Setting capabilities for clickhouse binary. This is optional.
ClickHouse has been successfully installed.
Start clickhouse-server with:
sudo clickhouse start
Start clickhouse-client with:
clickhouse-client
Created symlink from /etc/systemd/system/multi-user.target.wants/clickhouse-server.service to /etc/systemd/system/clickhouse-server.service.
正在更新 : clickhouse-client-21.9.4.35-2.noarch 3/7
清理 : clickhouse-client-20.8.3.18-1.el7.x86_64 4/7
清理 : clickhouse-server-20.8.3.18-1.el7.x86_64 5/7
正在删除 : clickhouse-server-common-20.8.3.18-1.el7.x86_64 6/7
清理 : clickhouse-common-static-20.8.3.18-1.el7.x86_64 7/7
验证中 : clickhouse-server-21.9.4.35-2.noarch 1/7
验证中 : clickhouse-client-21.9.4.35-2.noarch 2/7
验证中 : clickhouse-common-static-21.9.4.35-2.x86_64 3/7
验证中 : clickhouse-common-static-20.8.3.18-1.el7.x86_64 4/7
验证中 : clickhouse-server-20.8.3.18-1.el7.x86_64 5/7
验证中 : clickhouse-server-common-20.8.3.18-1.el7.x86_64 6/7
验证中 : clickhouse-client-20.8.3.18-1.el7.x86_64 7/7
已安装:
clickhouse-server.noarch 0:21.9.4.35-2
更新完毕:
clickhouse-client.noarch 0:21.9.4.35-2 clickhouse-common-static.x86_64 0:21.9.4.35-2
替代:
clickhouse-server-common.x86_64 0:20.8.3.18-1.el7
完毕！
5、启动验证
为防止不同版本配置文件有差别，将旧的配置文件内容一条条复制到新的配置文件中，然后重新启动节点。
systemctl start clickhouse-server
systemctl status clickhouse-server
ps -ef | grep clickhouse-server
clickhouse-watchdog
/usr/bin/clickhouse-server
总结
整体升级过程比较简单，每个节点都要按照如上步骤进行升级重启，最后进行验证