clickhouse突然启动不起来问题排查

场景：

在实现postgreql数据迁移到clickhouse中，想使用MaterializedPostgreSQL的功能实现，但是中途clickhouse突然挂了，就再启动不了了。

现象：

systemctl start clcikhouse-server启动报错

[root@localhost clickhouse-server]# systemctl  status clickhouse-server 
● clickhouse-server.service - ClickHouse Server (analytic DBMS for big data)Loaded: loaded (/etc/systemd/system/clickhouse-server.service; enabled; vendor preset: disabled)Active: activating (auto-restart) (Result: exit-code) since 二 2024-03-19 10:46:43 CST; 5s agoProcess: 22672 ExecStart=/usr/bin/clickhouse-server --config=/etc/clickhouse-server/config.xml --pid-file=/run/clickhouse-server/clickhouse-server.pid (code=exited, status=232/ADDRESS_FAMILIES)Main PID: 22672 (code=exited, status=232/ADDRESS_FAMILIES)

启动日志分析

journalctl -xe


[root@localhost clickhouse-server]# journalctl -xe
3月 19 10:47:13 localhost.localdomain clickhouse-server[22714]: Processing configuration file '/etc/clickhouse-server/config.xml'.
3月 19 10:47:13 localhost.localdomain clickhouse-server[22714]: Logging trace to /var/log/clickhouse-server/clickhouse-server.log
3月 19 10:47:13 localhost.localdomain clickhouse-server[22714]: Poco::Exception. Code: 1000, e.code() = 13, Access to file denied: /var/log/clickhouse-server/clickhouse-server.log, Stack trace (when co
3月 19 10:47:13 localhost.localdomain clickhouse-server[22714]: 0.

Access to file denied：/var/log/clickhouse-server/clickhouse-server.log

关键报错提示访问这个日志文件被拒绝了。

原因

原因是项目挂了后，我把var/log/clickhouse-server下的日志全部删除了，然后手动创建的如下文件

/var/log/clickhouse-server/clickhouse-server.log

var/log/clickhouse-server/clickhouse-server.err.log

复盘

我当时是这么赋予权属的

chown root:root /var/log/clickhouse-server/clickhouse-server.log

chown root:root var/log/clickhouse-server/clickhouse-server.err.log

错就错在这里了！！！

配置文件clickhouse.xml的权属都是clickhouse,且在config.xml中有日志的具体配置路径

然后改成

chown clickhouse:clickhouse var/log/clickhouse-server/clickhouse-server.err.log

chown clickhouse:clickhouse var/log/clickhouse-server/clickhouse-server.log

重启服务OK了