如何更新 Cassandra system.log 的权限？

Question

when configured through logback.xml, by default system.log was created with permission set -rw-r----- with cassandra user having ownership. For exporting logs tried updating -rw-r--r-- to 644 permission, But on logrotation that was reverted by cassandra.

Anyway the privilege for these files can be updated through configuration?

Answer 1

This isn't really a Cassandra question but a filesystem security issue.

Your server has strict permissions for newly-created files. In Unix, the user file-creation mode mask ( umask ) determines the permissions when files get created -- Logback doesn't set the permissions so it is not configurable through logback.xml .

You need to update the default umask for the Cassandra user so permissions are not so restrictive. The default umask is usually set to 022 so the owner has read/write/execute permissions ( 0 ), and everyone else has read access ( 2 ).

The default umask is typically configured in the following locations:

• /etc/profile
• /etc/bash.bashrc

You can check the current setting by running:

$ umask

You can set default umask for Cassandra by adding it to ~/.bashrc or ~/.bash_profile , for example:

umask 022

If you need assistance, consult your sysadmin team. Cheers!

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