Re: Relocating mysql

Casper <[email protected]> Thu, 18 May 2023 09:14:15 +0200
Newsgroups	gmane.linux.redhat.fedora.selinux
Message-ID	<[email protected]>
What is the connection between httpd and mariadb server? Is it Unix
socket file? Or TCP socket?

In the case of TCP socket (port + host), it looks weird for httpd
going to read /var/lib/mysql/

Gionatan Danti a écrit :
> Hi all,
> I have a question about mysql relocation.
> 
> I already created an equivalency rule such as "semanage fcontext --list -C"
> returns the following:
> SELinux Local fcontext Equivalence
> /mnt/lv_data/var/lib/mysql = /var/lib/mysql
> 
> Then I created a symlink in /var/lib:
> system_u:object_r:mysqld_db_t:s0    26 May 17 14:39 mysql ->
> /mnt/lv_data/var/lib/mysql
> 
> However, httpd/php can not connect to the database. The following message is
> logged in audit.log:
> type=AVC msg=audit(1684352064.936:232): avc:  denied  { read } for  pid=8558
> comm="httpd" name="mysql" dev="sda4" ino=147925
> scontext=system_u:system_r:httpd_t:s0
> tcontext=system_u:object_r:mysqld_db_t:s0 tclass=lnk_file permissive=0
> 
> My understanding is that httpd can not read the symlink. I expected to find
> a boolean to allow this kind of access, to no avail.
> 
> So my question is: can I allow httpd symlink access without manually
> modifying the actual policy (ie: using audit2allow and the likes)?
> 
> Thanks.
> 
> -- 
> Danti Gionatan
> Supporto Tecnico
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