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Filename : mariadb@.service
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# Multi instance version of mariadb. For if you run multiple versions at once.
#
# create config file /etc/my.cnf.d/my{instancename}.cnf to be used as the
# configuration file for this service.
#
# start as systemctl start mariadb@{instancename}.server
#
# It's not recommended to modify this file in-place, because it will be
# overwritten during package upgrades.  If you want to customize, the
# best way is to create a file "/etc/systemd/system/mariadb@.service",
# containing
#	.include /usr/lib/systemd/system/mariadb@.service
#	...make your changes here...
# or create a file "/etc/systemd/system/mariadb@.service.d/foo.conf",
# which doesn't need to include ".include" call and which will be parsed
# after the file mariadb@.service itself is parsed.
#
# For more info about custom unit files, see systemd.unit(5) or
# https://mariadb.com/kb/en/mariadb/systemd/
#
# Copyright notice:
#
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.

[Unit]
Description=MariaDB 10.3.39 database server (multi-instance %I)
Documentation=man:mysqld(8)
Documentation=https://mariadb.com/kb/en/library/systemd/
After=network.target
ConditionPathExists=/etc/my.cnf.d/my%I.cnf

[Install]
WantedBy=multi-user.target
Alias=mysql.service
Alias=mysqld.service


[Service]

##############################################################################
## Core requirements
##

Type=notify

# Setting this to true can break replication and the Type=notify settings
# See also bind-address mysqld option.
PrivateNetwork=false

##############################################################################
## Package maintainers
##

User=mysql
Group=mysql

# To allow memlock to be used as non-root user if set in configuration
CapabilityBoundingSet=CAP_IPC_LOCK

# Prevent writes to /usr, /boot, and /etc
ProtectSystem=full



# Doesn't yet work properly with SELinux enabled
# NoNewPrivileges=true

PrivateDevices=true

# Prevent accessing /home, /root and /run/user
ProtectHome=true

# Execute pre and post scripts as root, otherwise it does it as User=
PermissionsStartOnly=true



# Perform automatic wsrep recovery. When server is started without wsrep,
# galera_recovery simply returns an empty string. In any case, however,
# the script is not expected to return with a non-zero status.
# It is always safe to unset _WSREP_START_POSITION%I environment variable.
# Do not panic if galera_recovery script is not available. (MDEV-10538)
ExecStartPre=/bin/sh -c "systemctl unset-environment _WSREP_START_POSITION%I"

ExecStartPre=/bin/sh -c "[ ! -e /usr/bin/galera_recovery ] && VAR= || \
 VAR=`cd /usr/bin/..; /usr/bin/galera_recovery --defaults-file=/etc/my.cnf.d/my%I.cnf`; [ $? -eq 0 ] \
 && systemctl set-environment _WSREP_START_POSITION%I=$VAR || exit 1"

# Alternate: (remove ConditionPathExists above)
# use [mysqld.INSTANCENAME] as sections in my.cnf
#
#ExecStartPre=/bin/sh -c "[ ! -e /usr/bin/galera_recovery ] && VAR= || \
# VAR=`cd /usr/bin/..; /usr/bin/galera_recovery --defaults-group-suffix=%I`; [ $? -eq 0 ] \
# && systemctl set-environment _WSREP_START_POSITION%I=$VAR || exit 1"

# Needed to create system tables etc.
# ExecStartPre=/usr/bin/mysql_install_db -u mysql

# Start main service
# MYSQLD_OPTS here is for users to set in /etc/systemd/system/mariadb@.service.d/MY_SPECIAL.conf
# Use the [Service] section and Environment="MYSQLD_OPTS=...".
# This isn't a replacement for my.cnf.
# _WSREP_NEW_CLUSTER is for the exclusive use of the script galera_new_cluster

# Note: Place $MYSQLD_OPTS at the very end for its options to take precedence.

ExecStart=/usr/libexec/mysqld --defaults-file=/etc/my.cnf.d/my%I.cnf \
  $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION%I $MYSQLD_OPTS
# Alternate: (remove ConditionPathExists above)
# use [mysqld.INSTANCENAME] as sections in my.cnf
#
# ExecStart=/usr/libexec/mysqld --defaults-group-suffix=%I \
# $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION%I $MYSQLD_OPTS

# Unset _WSREP_START_POSITION environment variable.
ExecStartPost=/bin/sh -c "systemctl unset-environment _WSREP_START_POSITION%I"



KillSignal=SIGTERM

# Don't want to see an automated SIGKILL ever
SendSIGKILL=no

# Restart crashed server only, on-failure would also restart, for example, when
# my.cnf contains unknown option
Restart=on-abort
RestartSec=5s

UMask=007

##############################################################################
## USERs can override
##
##
## by creating a file in /etc/systemd/system/mariadb.service.d/MY_SPECIAL.conf
## and adding/setting the following below [Service] will override this file's
## settings.

# Useful options not previously available in [mysqld_safe]

# Kernels like killing mysqld when out of memory because its big.
# Lets temper that preference a little.
# OOMScoreAdjust=-600

# Explicitly start with high IO priority
# BlockIOWeight=1000

# If you don't use the /tmp directory for SELECT ... OUTFILE and
# LOAD DATA INFILE you can enable PrivateTmp=true for a little more security.
PrivateTmp=false

# Set an explicit Start and Stop timeout of 900 seconds (15 minutes!)
# this is the same value as used in SysV init scripts in the past
# if you need a longer timeout, check the KB:
# https://mariadb.com/kb/en/library/systemd/#configuring-the-systemd-service-timeout
TimeoutStartSec=900
TimeoutStopSec=900

##
## Options previously available to be set via [mysqld_safe]
## that now needs to be set by systemd config files as mysqld_safe
## isn't executed.
##

# Number of files limit. previously [mysqld_safe] open-files-limit
LimitNOFILE=32768

# Maximium core size. previously [mysqld_safe] core-file-size
# LimitCore=

# Nice priority. previously [mysqld_safe] nice
# Nice=-5

# Timezone. previously [mysqld_safe] timezone
# Environment="TZ=UTC"

# Library substitutions. previously [mysqld_safe] malloc-lib with explicit paths
# (in LD_LIBRARY_PATH) and library name (in LD_PRELOAD).
# Environment="LD_LIBRARY_PATH=/path1 /path2" "LD_PRELOAD=

# Flush caches. previously [mysqld_safe] flush-caches=1
# ExecStartPre=sync
# ExecStartPre=sysctl -q -w vm.drop_caches=3

# numa-interleave=1 equalivant
# Change ExecStart=numactl --interleave=all /usr/libexec/mysqld......

# crash-script equalivent
# FailureAction=