Re: grant connect to all databases

On 10/5/24 09:04, Matt Zagrabelny wrote:
>
>
> On Sat, Oct 5, 2024 at 10:27 AM Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com
> <mailto:adrian(dot)klaver(at)aklaver(dot)com>> wrote:
>
> On 10/5/24 07:13, Matt Zagrabelny wrote:
> > Hi David (and others),
> >
> > Thanks for the info about Public.
> >
> > I should expound on my original email.
> >
> > In our dev and test environments our admins (alice, bob, eve) are
> > superusers. In production environments we'd like the admins to be
> read-only.
>
> What are the REVOKE and GRANT commands you use to achieve that?
>
>
> GRANT alice TO pg_read_all_data;

Does alice have existing GRANTs?

I would try:

GRANT pg_read_all_data TO alice;

As example:

psql -d test -U postgres

List of role grants
Role name | Member of | Options | Grantor
------------+----------------------+--------------+----------
aklaver | app_admin | INHERIT, SET | postgres
aklaver | production | INHERIT, SET | postgres
dd_admin | dd_owner | ADMIN, SET | postgres
dd_user | dd_admin | INHERIT, SET | postgres
pg_monitor | pg_read_all_settings | INHERIT, SET | postgres
pg_monitor | pg_read_all_stats | INHERIT, SET | postgres
pg_monitor | pg_stat_scan_tables | INHERIT, SET | postgres
postgres | dd_owner | INHERIT, SET | postgres

grant pg_read_all_data to adrian;
GRANT ROLE

test=# \drgS
List of role grants
Role name | Member of | Options | Grantor
------------+----------------------+--------------+----------
adrian | pg_read_all_data | INHERIT, SET | postgres
aklaver | app_admin | INHERIT, SET | postgres
aklaver | production | INHERIT, SET | postgres
dd_admin | dd_owner | ADMIN, SET | postgres
dd_user | dd_admin | INHERIT, SET | postgres
pg_monitor | pg_read_all_settings | INHERIT, SET | postgres
pg_monitor | pg_read_all_stats | INHERIT, SET | postgres
pg_monitor | pg_stat_scan_tables | INHERIT, SET | postgres
postgres | dd_owner | INHERIT, SET | postgres

\dt csv_test
List of relations
Schema | Name | Type | Owner
--------+----------+-------+----------
public | csv_test | table | postgres

test=# \q

psql -d test -U adrian

test=> select * from csv_test ;
id | val
----+------
1 | test
2 | dog
3 | cat
4 | test
5 | fish

>
> ...and then I could do something like this:
> -- for $database in $databases;
> GRANT CONNECT ON database $database TO alice;
>
> ...but I'd like to achieve it without the `for` loop.
>
>
> >
> > Is the Public role something I can leverage to achieve this desire?
>
> You should read:
>
> https://www.postgresql.org/docs/current/ddl-priv.html
> <https://www.postgresql.org/docs/current/ddl-priv.html>
>
>
> Will do.
>
>
>
>
>  From your original post:
>
> "but I cannot connect to my database"
>
> Was that due to a GRANT issue or a pg_hba.conf issue?
>
>
> It was due to the missing GRANT CONNECT from above. pg_hba looks OK.
>
> What was the actual complete error?
>
>
> alice$ psql foo
> psql: error: connection to server at "db.example.com
> <http://db.example.com>" (fe80:100), port 5432 failed: FATAL:
>  permission denied for database "foo"
> ...after I GRANT CONNECT, I can connect. However, I don't want to have
> to iterate over all the databases to achieve the GRANT CONNECT.
>
> I guess I was hoping that the pg_read_all_data would also allow
> connecting. Or if it didn't, there could/would be a
> pg_connect_all_databases role.
>
> Cheers,
>
> -m

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com