SELinux is preventing /usr/bin/mysqld_safe_helper from using the setgid capability.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that mysqld_safe_helper should have the setgid capability by default.

Then you should report this as a bug.

You can generate a local policy module to allow this access.

Do

allow this access for now by executing:

# ausearch -c 'mysqld_safe_hel' --raw | audit2allow -M my-mysqldsafehel

# semodule -i my-mysqldsafehel.pp

Additional Information:

Source Context                system_u:system_r:mysqld_safe_t:s0

Target Context                system_u:system_r:mysqld_safe_t:s0

Target Objects                Unknown [ capability ]

Source                        mysqld_safe_hel

Source Path                   /usr/bin/mysqld_safe_helper

Port                          <Unknown>

Host                          <Unknown>

Source RPM Packages           MariaDB-server-10.0.30-1.el7.centos.x86_64

Target RPM Packages

Policy RPM                    selinux-policy-3.13.1-102.el7_3.15.noarch

Selinux Enabled               True

Policy Type                   targeted

Enforcing Mode                Enforcing

Host Name                     localhost.localdomain

Platform                      Linux localhost.localdomain

                              3.10.0-514.2.2.el7.x86_64 #1 SMP Tue Dec 6

                              23:06:41 UTC 2016 x86_64 x86_64

Alert Count                   4

First Seen                    2017-03-11 00:13:14 PST

Last Seen                     2017-03-11 00:13:14 PST

Local ID                      0ed292fb-afa4-4222-8e26-e85411f37926

Raw Audit Messages

type=AVC msg=audit(1489219994.398:460): avc:  denied  { setgid } for  pid=49629 comm="mysqld_safe_hel" capability=6  scontext=system_u:system_r:mysqld_safe_t:s0 tcontext=system_u:system_r:mysqld_safe_t:s0 tclass=capability

type=SYSCALL msg=audit(1489219994.398:460): arch=x86_64 syscall=setgroups success=no exit=EPERM a0=1 a1=2886530 a2=3d6 a3=7f72793de2e0 items=0 ppid=49553 pid=49629 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=mysqld_safe_hel exe=/usr/bin/mysqld_safe_helper subj=system_u:system_r:mysqld_safe_t:s0 key=(null)

Hash: mysqld_safe_hel,mysqld_safe_t,mysqld_safe_t,capability,setgid

[root@localhost ~]# systemctl status mysql

â mysql.service - LSB: start and stop MySQL

   Loaded: loaded (/etc/rc.d/init.d/mysql; bad; vendor preset: disabled)

   Active: failed (Result: exit-code) since Sat 2017-03-11 00:13:15 PST; 8s ago

     Docs: man:systemd-sysv-generator(8)

  Process: 49546 ExecStart=/etc/rc.d/init.d/mysql start (code=exited, status=1/FAILURE)

Mar 11 00:13:14 localhost.localdomain systemd[1]: Starting LSB: start and stop MySQL...

Mar 11 00:13:14 localhost.localdomain mysql[49546]: Starting MySQL.170311 00:13:14 mysqld_safe Logging to '/var/lib/mysql/localhost.localdomain.err'.

Mar 11 00:13:14 localhost.localdomain mysql[49546]: 170311 00:13:14 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql

Mar 11 00:13:14 localhost.localdomain mysql[49546]: /usr/bin/mysqld_safe_helper: Cannot change uid/gid (errno: 1)

Mar 11 00:13:15 localhost.localdomain mysql[49546]: ERROR!

Mar 11 00:13:15 localhost.localdomain systemd[1]: mysql.service: control process exited, code=exited status=1

Mar 11 00:13:15 localhost.localdomain systemd[1]: Failed to start LSB: start and stop MySQL.

Mar 11 00:13:15 localhost.localdomain systemd[1]: Unit mysql.service entered failed state.

Mar 11 00:13:15 localhost.localdomain systemd[1]: mysql.service failed.

[root@localhost ~]# mysql -V

mysql  Ver 15.1 Distrib 10.0.30-MariaDB, for Linux (x86_64) using readline 5.1