# Copyright (c) 2015, 2022, Oracle and/or its affiliates.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2.0,
# as published by the Free Software Foundation.
#
# This program is also distributed with certain software (including
# but not limited to OpenSSL) that is licensed under separate terms,
# as designated in a particular file or component or in included license
# documentation.  The authors of MySQL hereby grant you an additional
# permission to link the program and your derivative works with the
# separately licensed software that they have included with MySQL.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License, version 2.0, for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
#
# systemd service file for MySQL forking server
#

[Unit]
Description=MySQL Server
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target

[Install]
WantedBy=multi-user.target

[Service]
User=mysql
Group=mysql

Type=notify

# Disable service start and stop timeout logic of systemd for mysqld service.
TimeoutSec=0

# Execute pre and post scripts as root
PermissionsStartOnly=true

# Needed to create system tables
#ExecStartPre=/usr/bin/mysqld_pre_systemd

# Start main service
ExecStart=/opt/mysql/mysql/bin/mysqld --defaults-file=/etc/my.cnf

# Use this to switch malloc implementation
EnvironmentFile=-/etc/sysconfig/mysql

# Sets open_files_limit
LimitNOFILE = 65535

Restart=on-failure         # 重啟條件
ReStartSec=10              # 重啟條件滿足后等多久自動重啟(秒)
StartLimitInterval=300     # 五分鐘內(nèi)只能重啟兩次，第三次不重啟了 
StartLimitBurst=2          # 五分鐘內(nèi)只能重啟兩次，第三次不重啟了
TimeoutStartSec=120        # 服務(wù)啟動的超時時間，單位秒
TimeoutStopSec=120         # 服務(wù)關(guān)閉的超時時間，單位秒

RestartPreventExitStatus=1

# Set enviroment variable MYSQLD_PARENT_PID. This is required for restart.
Environment=MYSQLD_PARENT_PID=1

PrivateTmp=false