I've compiled Percona 5.5 on my CentOS 6.1 server and it starts fine, however it doesn't appear to be reading my /etc/my.cnf file.
# In /etc/my.cnf
character_set_server = utf8
collation_server = utf8_general_ci
mysql> show variables like 'character_set_server';
+----------------------+--------+
| Variable_name | Value |
+----------------------+--------+
| character_set_server | latin1 |
+----------------------+--------+
1 row in set (0.00 sec)
Here, I expect to see a value of 'utf8', not latin1.
Currently the /etc/my.cnf set as a symbolic link pointed to a my.cnf file which is currently in version control, so it looks like:
root@host ~/MyFile/Setup # -> ls /etc/my.cnf
lrwxrwxrwx. 1 root root 64 Dec 17 19:05 /etc/my.cnf -> /home/src/config/current/sys/etc/mysql/prod/confs-enabled/my.cnf
Upon some initial googling, it seems that I need to specifically set the path of the my.cnf file using the --defaults-file=/etc/my.cnf, flag. Which isn't currently being set through the CentOS daemon script:
ps auxfw > tmp.txt
vi tmp.txt
root 11798 0.0 0.1 106044 1488 pts/0 S 19:09 0:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/lib/mysql/host.localdomain.pid
mysql 11875 0.1 4.3 499560 43936 pts/0 Sl 19:09 0:00 \_ /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/lib/mysql/host.localdomain.err --pid-file=/var/lib/mysql/host.localdomain.pid
So my question is, how do I add the ability to pass the --defaults-file=/etc/my.cnf flag to /etc/init.d/mysql daemon script?
Thanks.
-- UPDATE --
The problem appears to be because I have selinux policy set to enforcing, and trying to symlink my.cnf. Consider the following:
lrwxrwxrwx. 1 root root 72 Feb 7 05:02 my.cnf -> /home/src/config/current/sys/etc/mysql/prod/confs-available/my-large.cnf
And the /home/src perms look like:
drwxrwxr-x. src src unconfined_u:object_r:user_home_t:s0 config
If I copy the same exact file to /etc, it works, and if I disable selinux, it also works. So it has to do with the fact that mysql is trying to access /home/src.
Also, I did an audit2why, and it responded with:
Feb 8 17:32:20 app-mldrinks-aa-1 kernel: type=1400 audit(1328722340.203:17): avc: denied { read } for pid=2109 comm="mysqld" name="xvda" dev=devtmpfs ino=5801 scontext=unconfined_u:system_r:mysqld_t:s0 tcontext=system_u:object_r:fixed_disk_device_t:s0 tclass=blk_file
Was caused by:
Missing type enforcement (TE) allow rule.
You can use audit2allow to generate a loadable module to allow this access.
Is there a way to make this work without having to create a custom selinux module? I can't change the context type of /home/src/config/current to mysqld_db_t because everytime I push a config change a new directory will be created with user_home_t, which will contain the latest changes.
