【磐维数据库】DTP迁移--服务异常导致安装时配置库没起来

背景

• OS 版本       bcLinux 21.10
• cpu 架构      x86_64
• dtp版本       3.0.0

问题

• 安装时配置库没起来：
  

分析

1. 使用root用户，手动用服务起，可以复现：

[root@*** /software/dtp_unzip]$  systemctl start panweidb
Job for panweidb.service failed because the control process exited with error code.
See "systemctl status panweidb.service" and "journalctl -xe" for details.
[root@*** /software/dtp_unzip]$  systemctl status panweidb.service
● panweidb.service - PanWei 2.0
   Loaded: loaded (/etc/systemd/system/panweidb.service; enabled; vendor preset: disabled)
   Active: activating (auto-restart) (Result: exit-code) since Tue 2024-08-13 14:54:53 CST; 2s ago
  Process: 1290984 ExecStart=/dtp/deployment/panweidb/bin/pw_ctl start -D ${ADATA} (code=exited, status=217/USER)

2. 使用omm用户，使用 pw_ctl 可以拉起，说明配置库本身是没有问题的；
3. 使用

journalctl -xe

或

systemctl status panweidb | journalctl -xe

发现有报错：

8月 13 17:56:44 *** systemd[1079165]: panweidb.service: Failed to determine user credentials: No such process  
8月 13 17:56:44 *** systemd[1079165]: panweidb.service: Failed at step USER spawning /dtp/deployment/panweidb/bin/pw_ctl: No such process

kafka 服务与配置库关系不大，也没起来，怀疑和某个具体服务无关。

解决

• 在网上查找上方报错后，尝试以下指令，解决了问题：

systemctl daemon-reexec

原因

怀疑该环境之前有修改 /etc/systemd/system.conf 的动作，但没有重载文件。

关于 systemctl daemon-reexec 指令：

daemon-reexec
           Reexecute the systemd manager. This will serialize the manager state, reexecute the process and deserialize the state again. This command is of little use except for
           debugging and package upgrades. Sometimes, it might be helpful as a heavy-weight daemon-reload. While the daemon is being reexecuted, all sockets systemd listening on
           behalf of user configuration will stay accessible.

只执行 systemctl daemon-reload 不会重载 /etc/systemd/system.conf

其他

在 root 用户下使用 pw_ctl 启动数据库，发现有报错，但这实际是错误的排查方向，因为正常用 root 起也会报这个错误，跟环境变量有关（和正常磐维库一样）：

[root@*** /software/dtp_unzip]$  /dtp/deployment/panweidb/bin/pw_ctl start -D /dtp/data/confdb
/dtp/deployment/panweidb/bin/pw_ctl: error while loading shared libraries: libgssapi_krb5_gauss.so.2: cannot open shared object file: No such file or directory

[root@*** /software/dtp_unzip]$  find / -name libgssapi_krb5_gauss.so.2
......
/dtp/deployment/panweidb/lib/libgssapi_krb5_gauss.so.2