On 2024-02-07 We 05:37, Gabriele Bartolini wrote:
Hi Joel,
On Fri, Sep 8, 2023, at 16:17, Gabriele Bartolini wrote:
> ```
> postgres=# ALTER SYSTEM SET wal_level TO minimal;
> ERROR: could not open file "postgresql.auto.conf": Permission denied
> ```
+1 to simply mark postgresql.auto.conf file as not being writeable.
To improve the UX experience, how about first checking if the file is not writeable, or catch EACCESS, and add a user-friendly hint?
```
postgres=# ALTER SYSTEM SET wal_level TO minimal;
ERROR: could not open file "postgresql.auto.conf": Permission denied
HINT: The ALTER SYSTEM command is effectively disabled as the configuration file is set to read-only.
```
This would do - provided we fix the issue with pg_rewind not handling read-only files in PGDATA.
This seems like the simplest solution. And maybe we should be fixing pg_rewind regardless of this issue?
cheers
andrew
--
Andrew Dunstan
EDB: https://www.enterprisedb.com
