When enabling MariaDB (BR2_PACKAGE_MARIADB=y) and systemd
(BR2_INIT_SYSTEMD=y) in buildroot, the mysqld.service fail to start
with a permission error. See output of command:
journalctl --unit=mysqld
Which shows:
systemd[1]: Starting MySQL database server...
install[102]: install: can't create directory '/var/log/mysql': Permission denied
systemd[1]: mysqld.service: Control process exited, code=exited, status=1/FAILURE
Since the service file includes the "User=mysql" directive, the
"ExecStartPre=" is executed as this user, which does not have
permission to create a directory in "/var/log".
This commit fixes this issue by adding the "!" prefix, which will
execute the command with full privileges. See the systemd.service manual
page entry for "ExecStart=", table "Special executable prefixes":
https://www.freedesktop.org/software/systemd/man/systemd.service.html#ExecStart=
or https://github.com/systemd/systemd/blob/v250/man/systemd.service.xml#L339
Moreover, the "mysql_install_db" invocation does not need this special
prefix, as the "/var/lib/mysql" directory on target is already owned
by the "mysql" user. The "chown" command is also useless and is
removed in this commit.
Reported-by: Gilles Talis <gilles.talis@gmail.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>
Tested-By: Gilles Talis <gilles.talis@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
fd03d4f057