MariaDB 10 CentOS 7 moving datadir woes

Question

Brand new \"minimal\" install of CentOS 7 along with MariaDB 10. I have an additional mounted mirrored volume that I want to use for the datadir. Startup sequence is fine and co

Answer 1

The issue is indeed SELinux; you need to do three things before MariaDB / MySQL will start on CentOS 7:

1. Ensure the user:group is mysql:mysql
2. Set the SELinux tag to mysqld_db_t
3. Set the SELinux user to system_u

This is as simple as:

chcon -Rt mysqld_db_t /database/db
chcon -Ru system_u /database/db
chown -R mysql:mysql /database/db

The whole thing I needed to do after plugging in a disk is below:

cfdisk /dev/sdb
pvcreate /dev/sdb1
vgcreate database /dev/sdb1
lvcreate -l 100%FREE -n db database
mkfs.ext4 /dev/database/db
mkdir /database
mount /database
mkdir /database/db
chcon -Rt mysqld_db_t /database/db
chcon -Ru system_u /database/db
chown -R mysql:mysql /database/db
systemctl start mariadb