mirror of
https://github.com/MariaDB/server.git
synced 2025-10-31 10:56:12 +01:00
300 lines
9.8 KiB
SYSTEMD
300 lines
9.8 KiB
SYSTEMD
# Multi instance version of MariaDB
|
|
#
|
|
# Use this if you run multiple instances of MariaDB on a single server.
|
|
#
|
|
# This systemd service is not suitable for Galera as specialised SST recovery
|
|
# scripts are needed.
|
|
#
|
|
#
|
|
# 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.
|
|
#
|
|
#
|
|
# MULTI INSTANCES
|
|
#
|
|
# When multiple instances of MariaDB are running on a server they need to
|
|
# ensure that they don't conflict with each other. This includes elements
|
|
# like network ports, sockets and data directories listed under CONFLICTING
|
|
# VARIABLES below. The systemd environment variable MYSQLD_MULTI_INSTANCE
|
|
# controls each instance to ensure it is run independently. It is passed to
|
|
# mariadbd and mysql_install
|
|
#
|
|
# By default, a group suffix exists and within the default configuration
|
|
# files, a group [mariadbd.{instancename}] is read for each service. Other
|
|
# default groups, like [server.{instancename}] and [mariadb.{instancename}],
|
|
# are also read. For each instance, one of the groups will need to contain
|
|
# the conflicting variables listed below under CONFLICTING VARIABLES.
|
|
#
|
|
# The MYSQLD_MULTI_INSTANCE environment used is:
|
|
# Environment='MYSQLD_MULTI_INSTANCE=--defaults-group-suffix=.%I --basedir=@prefix@'
|
|
#
|
|
#
|
|
# APPLYING YOUR MULTI INSTANCE MECHANISM
|
|
#
|
|
# To apply one of the non-default multi-instance mechanisms, create a file
|
|
# "/etc/systemd/system/mariadb@.service.d/multi.conf" containing:
|
|
#
|
|
# [Service]
|
|
# Environment=MYSQLD_MULTI_INSTANCE="...."
|
|
#
|
|
# Include any other settings you which to override. Directives like Exec* are
|
|
# lists and adding a directive will append to the list. You can clear the list
|
|
# by starting with "Directive=" and no value. Follow this by the list that you
|
|
# do want. See the systemd.unit(5) manual page for more information.
|
|
#
|
|
# Then run "systemctl daemon-reload".
|
|
#
|
|
#
|
|
# EXAMPLE MYSQLD_MULTI_INSTANCE CONFIGURATIONS
|
|
#
|
|
# Configuration File Based Mechanism:
|
|
#
|
|
# This has a configuration file per instance.
|
|
#
|
|
# [Unit]
|
|
# ConditionPathExists=@sysconfdir@/my.%I.cnf
|
|
#
|
|
# [Service]
|
|
# Environment=MYSQLD_MULTI_INSTANCE=--defaults-file=@sysconfdir@/my.%I.cnf
|
|
#
|
|
# Here you need to create a configuration file @sysconfdir@/my.%I.cnf for each
|
|
# instance, each containing the conflicting variables to separate instances.
|
|
#
|
|
#
|
|
# Multi User Based Mechanism:
|
|
#
|
|
# Here each user (the instance name) has their own mysql instance.
|
|
#
|
|
# Create instances in users home directory with abstract socket:
|
|
#
|
|
# [Service]
|
|
# User=%I
|
|
# ProtectHome=false
|
|
# ExecStartPre=
|
|
# ExecStartPre=@scriptdir@/mysql_install_db $MYSQLD_MULTI_INSTANCE \
|
|
# --auth-root-authentication-method=socket --auth-root-socket-user=%I
|
|
# Environment=MYSQLD_MULTI_INSTANCE="--defaults-file=/home/%I/my%I.cnf \
|
|
# --datadir=/home/%I/mysqldatadir --skip-networking --socket=@mysql-%I"
|
|
#
|
|
#
|
|
# Command Line Mechanism:
|
|
#
|
|
# This is a good way run multiple instance where there is little difference
|
|
# in configuration between instances.
|
|
#
|
|
# [Service]
|
|
# Environment=MYSQLD_MULTI_INSTANCE="--socket=/run/mysqld/%I.sock \
|
|
# --datadir=/var/lib/mysqld-multi/%I \
|
|
# --skip-networking"
|
|
#
|
|
#
|
|
# CONFLICTING VARIABLES
|
|
#
|
|
# A number of MariaDB system variables may conflict. The main ones that need to
|
|
# be set because their default values will conflict are:
|
|
# * socket
|
|
# * port
|
|
# * datadir
|
|
#
|
|
#
|
|
# PRE-10.4
|
|
#
|
|
# Before 10.4 MYSQLD_MULTI_INSTANCE was effectively --defaults-file=@sysconf2dir@/my%I.cnf
|
|
# As @sysconfdir@/my.cnf included these files it was a bad choice as an
|
|
# existing single instance would include all these files. If you want to
|
|
# continue a file based multi-instance mariadbd, recommend the Configuration File
|
|
# Based Mechanism above and moving @sysconf2dir@/my%I.cnf files to @sysconfdir@/my%I.cnf.
|
|
#
|
|
#
|
|
# SELINUX
|
|
#
|
|
# As basic selinux rules are written around a single instance of MariaDB you may need
|
|
# to define labels for the files and network ports of all instances.
|
|
#
|
|
# See: https://mariadb.com/kb/en/library/what-to-do-if-mariadb-doesnt-start/#selinux
|
|
#
|
|
#
|
|
# STARTING
|
|
#
|
|
# Start the instance: systemctl start mariadb@{instancename}.service
|
|
#
|
|
#
|
|
# DOCUMENTATION:
|
|
#
|
|
# Read https://mariadb.com/kb/en/mariadb/systemd/ regarding customisation.
|
|
#
|
|
# Also see systemd man pages: systemd.unit(5), systemd.exec(5) and
|
|
# systemd.service(5)
|
|
|
|
[Unit]
|
|
Description=MariaDB @VERSION@ database server (multi-instance %I)
|
|
Documentation=man:mariadbd(8)
|
|
Documentation=https://mariadb.com/kb/en/library/systemd/
|
|
After=network.target
|
|
|
|
# Negated condition here is because 10.3 and before had @sysconf2dir@/my%I.cnf
|
|
# as the configuration difference for multiple instances. This condition here
|
|
# to prevent an accidental change during an upgrade in the case the user
|
|
# created these file(s).
|
|
#
|
|
## See Environment=MYSQLD_MULTI_INSTANCE below for current recommended options.
|
|
ConditionPathExists=!@sysconf2dir@/my%I.cnf
|
|
|
|
|
|
[Install]
|
|
WantedBy=multi-user.target
|
|
|
|
|
|
[Service]
|
|
##############################################################################
|
|
## Core requirements
|
|
##
|
|
|
|
Type=notify
|
|
|
|
# Setting this to true can break replication and the Type=notify settings
|
|
# See also bind-address mariadbd option.
|
|
PrivateNetwork=false
|
|
|
|
##############################################################################
|
|
## Package maintainers
|
|
##
|
|
|
|
# CAP_IPC_LOCK To allow memlock to be used as non-root user
|
|
# These are enabled by default
|
|
AmbientCapabilities=CAP_IPC_LOCK
|
|
|
|
# PrivateDevices=true implies NoNewPrivileges=true and
|
|
# SUID auth_pam_tool suddenly doesn't do setuid anymore
|
|
PrivateDevices=false
|
|
|
|
# Prevent writes to /usr, /boot, and /etc
|
|
ProtectSystem=full
|
|
|
|
@SYSTEMD_READWRITEPATH@
|
|
|
|
# Requires kernel 4.14 or later and SELinux transition rule for mysqld_t
|
|
# (https://github.com/systemd/systemd/issues/3845)
|
|
# NoNewPrivileges=true
|
|
|
|
# Prevent accessing /home, /root and /run/user
|
|
ProtectHome=true
|
|
|
|
# Needed to create system tables etc.
|
|
ExecStartPre=@scriptdir@/mysql_install_db $MYSQLD_MULTI_INSTANCE
|
|
|
|
# Start main service
|
|
# A few variables are here:
|
|
# * MYSQLD_MULTI_INSTANCE - control how multiple instances are distinguisable
|
|
# * MYSQLD_OPTS - user definable extras - not a replacement for my.cnf
|
|
#
|
|
# Note 1: Place $MYSQLD_OPTS at the very end for its options to take precedence.
|
|
ExecStart=@sbindir@/mariadbd $MYSQLD_MULTI_INSTANCE $MYSQLD_OPTS
|
|
|
|
@SYSTEMD_EXECSTARTPOST@
|
|
|
|
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-abnormal
|
|
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 mariadbd 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
|
|
|
|
# Set the maximium number of tasks (threads) to 99% of what the system can
|
|
# handle as set by the kernel, reserve the 1% for a remote ssh connection,
|
|
# some monitoring, or that backup cron job. Without the directive this would
|
|
# be 15% (see DefaultTasksMax in systemd man pages).
|
|
TasksMax=99%
|
|
|
|
# Controlling how multiple instances are separated. See top of this file.
|
|
# Note: This service isn't User=mysql by default so we need to be explicit.
|
|
# It is as an option here as a user may want to use the MYSQLD_MULTI_INSTANCE
|
|
# to run multiple versions.
|
|
Environment='MYSQLD_MULTI_INSTANCE=--defaults-group-suffix=.%I'
|
|
|
|
# While you can override these, you shouldn't leave them empty as that
|
|
# will default to root.
|
|
User=mysql
|
|
Group=mysql
|
|
|
|
##
|
|
## 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
|
|
@SYSTEMD_LIMIT@
|
|
# 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 @sbindir@/mariadbd......
|
|
|
|
# crash-script equalivent
|
|
# FailureAction=
|