[CentOS] Moving Mysql data directory denied by selinux?
Craig White
craigwhite at azapple.com
Tue Oct 10 12:42:27 UTC 2006
On Tue, 2006-10-10 at 22:33 +1000, Peter Kiem wrote:
> Hi,
>
> I'm trying to move the MySQL data directory to /home/mysql like I have
> done with every other install I have done before but the difference is
> this time I am trying to have SELinux active instead of turning it off.
>
> I seem to need some help in
> a) Understanding what the selinux failure messages are saying; and
> b) How to correct the issue
>
> I've read the selinux docs and all I got was a headache *sigh*
>
> Now normally I just move /var/lib/mysql to /home/mysql and symlink it.
> SELinux complains with
> Oct 10 21:21:59 intspare kernel: audit(1160479319.080:2): avc: denied
> { read } for pid=15784 comm="mysqld" name="mysql" dev=dm-0 ino=1230340
> scontext=root:system_r:mysqld_t tcontext=root:object_r:var_lib_t
> tclass=lnk_file
>
> Ok, I guess it doesnt like following symlinks so instead I edited
> /etc/my.cnf to
> [mysqld]
> datadir=/home/mysql
> socket=/home/mysql/mysql.sock
> # Default to using old password format for compatibility with mysql 3.x
> # clients (those using the mysqlclient10 compatibility package).
> old_passwords=1
>
> [mysql.server]
> user=mysql
> basedir=/home
>
>
> Now SELinux complains with
> Oct 10 22:04:27 intspare kernel: audit(1160481867.663:2): avc: denied
> { search } for pid=3073 comm="mysqld" name="/" dev=dm-1 ino=2
> scontext=user_u:system_r:mysqld_t tcontext=system_u:object_r:home_root_t
> tclass=dir
>
> WHY is mysqld trying to read / when I told it to use /home/mysql ?
>
> BTW, here is the security contexts on /home/mysql
> # ls -laZ /home/
> drwxr-xr-x mysql mysql system_u:object_r:mysqld_db_t mysql
>
>
> Can anyone please shed some light on this for me?
>
> What exactly is the avc message telling me and how do I fix it?
----
probably easier to use a 'bind' mount of /home/mysql at /var/lib/mysql
and then it will inherit the contexts of /var/lib/mysql
Craig
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