Relocating mysql

Gionatan Danti <[email protected]> Wed, 17 May 2023 22:09:40 +0200
Newsgroups gmane.linux.redhat.fedora.selinux
Message-ID <[email protected]>
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
Assyoma S.r.l. - www.assyoma.it
email: [email protected] - [email protected]
GPG public key ID: FF5F32A8
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