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cutemeli
298
etc/init.d/mariadb
Executable file
298
etc/init.d/mariadb
Executable file
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#!/bin/bash
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#
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### BEGIN INIT INFO
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# Provides: mariadb
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# Required-Start: $remote_fs $syslog
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# Required-Stop: $remote_fs $syslog
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# Should-Start: $network $named $time
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# Should-Stop: $network $named $time
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# Default-Start: 2 3 4 5
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# Default-Stop: 0 1 6
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# Short-Description: Start and stop the MariaDB database server daemon
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# Description: Controls the main MariaDB database server daemon "mariadbd"
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# and its wrapper script "mysqld_safe".
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### END INIT INFO
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#
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set -e
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set -u
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${DEBIAN_SCRIPT_DEBUG:+ set -v -x}
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test -x /usr/sbin/mariadbd || exit 0
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# shellcheck source=/dev/null
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. /lib/lsb/init-functions
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SELF="$(cd "$(dirname "$0")"; pwd -P)/$(basename "$0")"
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if [ -f /usr/bin/mariadb-admin ]
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then
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MYADMIN="/usr/bin/mariadb-admin --defaults-file=/etc/mysql/debian.cnf"
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elif [ -f /usr/bin/mysqladmin ]
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then
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MYADMIN="/usr/bin/mysqladmin --defaults-file=/etc/mysql/debian.cnf"
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else
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log_failure_msg "Command mariadb-admin/mysqladmin not found! This SysV init script depends on it."
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exit 1
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fi
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if [ ! -x /usr/bin/mariadbd-safe ]
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then
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log_failure_msg "/usr/bin/mariadbd-safe not found or executable! This SysV init script depends on it."
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exit 1
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fi
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# priority can be overridden and "-s" adds output to stderr
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ERR_LOGGER="logger -p daemon.err -t /etc/init.d/mariadb -i"
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if [ -f /etc/default/mysql ]
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then
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# shellcheck source=/dev/null
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. /etc/default/mysql
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fi
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# Also source default/mariadb in case the installation was upgraded from
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# packages originally installed from MariaDB.org repositories, which have
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# had support for reading /etc/default/mariadb since March 2016.
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if [ -f /etc/default/mariadb ]
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then
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# shellcheck source=/dev/null
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. /etc/default/mariadb
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fi
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# Safeguard (relative paths, core dumps..)
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cd /
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umask 077
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# mysqladmin likes to read /root/.my.cnf. This is usually not what I want
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# as many admins e.g. only store a password without a username there and
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# so break my scripts.
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export HOME=/etc/mysql/
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## Fetch a particular option from mysql's invocation.
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#
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# Usage: void mariadbd_get_param option
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mariadbd_get_param() {
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/usr/sbin/mariadbd --print-defaults \
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| tr " " "\n" \
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| grep -- "--$1" \
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| tail -n 1 \
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| cut -d= -f2
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}
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## Do some sanity checks before even trying to start mariadbd.
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sanity_checks() {
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# check for config file
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if [ ! -r /etc/mysql/my.cnf ]
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then
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log_warning_msg "$0: WARNING: /etc/mysql/my.cnf cannot be read. See README.Debian.gz"
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echo "WARNING: /etc/mysql/my.cnf cannot be read. See README.Debian.gz" | $ERR_LOGGER
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fi
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# check for diskspace shortage
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datadir="$(mariadbd_get_param datadir)"
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# If datadir location is not customized in configuration
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# then it's not printed with /usr/sbin/mariadbd --print-defaults
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# and this should fall backt to a sane default value
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if [ -z "$datadir" ]
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then
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datadir="/var/lib/mysql"
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fi
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# Verify the datadir location exists
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if [ ! -d "$datadir" ] && [ ! -L "$datadir" ]
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then
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log_failure_msg "$0: ERROR: Can't locate MariaDB data location at $datadir"
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echo "ERROR: Can't locate MariaDB data location at $datadir" | $ERR_LOGGER
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exit 1
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fi
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# As preset blocksize of GNU df is 1024 then available bytes is $df_available_blocks * 1024
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# 4096 blocks is then lower than 4 MB
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df_available_blocks="$(LC_ALL=C BLOCKSIZE='' df --output=avail "$datadir" | tail -n 1)"
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if [ "$df_available_blocks" -lt "4096" ]
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then
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log_failure_msg "$0: ERROR: The partition with $datadir is too full!"
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echo "ERROR: The partition with $datadir is too full!" | $ERR_LOGGER
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exit 1
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fi
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}
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## Checks if there is a server running and if so if it is accessible.
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#
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# check_alive insists on a pingable server
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# check_dead also fails if there is a lost mariadbd in the process list
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#
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# Usage: boolean mariadbd_status [check_alive|check_dead] [warn|nowarn]
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mariadbd_status () {
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ping_output="$($MYADMIN ping 2>&1)"
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# The whole mariadbd_status function should be rewritten in clean shell script,
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# so ignore minor Shellcheck nag for now as fixing it would be half of the
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# rewrite
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# shellcheck disable=SC2181
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ping_alive="$(( ! $? ))"
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ps_alive=0
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pidfile="$(mariadbd_get_param pid-file)"
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if [ -f "$pidfile" ] && ps "$(cat "$pidfile")" >/dev/null 2>&1
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then
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ps_alive=1
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fi
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# Using '-a' is unstandard, but it works and might be needed for the grouping
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# of the if-else, so keep it and just ignore in Shellcheck
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# shellcheck disable=SC2166
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if [ "$1" = "check_alive" -a $ping_alive = 1 ] ||
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[ "$1" = "check_dead" -a $ping_alive = 0 -a $ps_alive = 0 ]
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then
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return 0 # EXIT_SUCCESS
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else
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if [ "$2" = "warn" ]
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then
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echo -e "$ps_alive processes alive and '$MYADMIN ping' resulted in\n$ping_output\n" | $ERR_LOGGER -p daemon.debug
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fi
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return 1 # EXIT_FAILURE
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fi
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}
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#
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# main()
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#
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case "${1:-''}" in
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'start')
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sanity_checks;
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# Start daemon
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log_daemon_msg "Starting MariaDB database server" "mariadbd"
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if mariadbd_status check_alive nowarn
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then
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log_progress_msg "already running"
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log_end_msg 0
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else
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# Could be removed during boot
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test -e /run/mysqld || install -m 755 -o mysql -g root -d /run/mysqld
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# Start MariaDB!
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/usr/bin/mariadbd-safe "${@:2}" 2>&1 >/dev/null | $ERR_LOGGER &
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for _ in $(seq 1 "${MYSQLD_STARTUP_TIMEOUT:-30}")
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do
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sleep 1
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if mariadbd_status check_alive nowarn
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then
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break
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fi
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log_progress_msg "."
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done
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if mariadbd_status check_alive warn
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then
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log_end_msg 0
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# Now start mysqlcheck or whatever the admin wants.
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output=$(/etc/mysql/debian-start)
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if [ -n "$output" ]
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then
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log_action_msg "$output"
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fi
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else
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# Try one more time but save error log separately, then spit it out
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# before logging ends and init script execution ends.
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if pgrep -ax mariadbd > /dev/null
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then
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echo "ERROR: The mariadbd process is running but not responding:"
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# shellcheck disable=SC2009
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# Show the mariadbd process and it's parent and next line (if there is a child process)
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ps faxu | grep mariadbd -C 1
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else
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ERROR_LOG_FILE="$(mktemp).err"
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echo # ensure newline
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timeout --kill-after=20 10 /usr/bin/mysqld_safe "${@:2}" --log-error="$ERROR_LOG_FILE"
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echo "Running '/etc/init.d/mariadb start' failed with error log:"
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cat "$ERROR_LOG_FILE"
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fi
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log_end_msg 1
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log_failure_msg "Please take a look at the syslog"
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fi
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fi
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;;
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'stop')
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# * As a passwordless mysqladmin (e.g. via ~/.my.cnf) must be possible
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# at least for cron, we can rely on it here, too. (although we have
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# to specify it explicit as e.g. sudo environments points to the normal
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# users home and not /root)
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log_daemon_msg "Stopping MariaDB database server" "mariadbd"
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if ! mariadbd_status check_dead nowarn
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then
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set +e
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shutdown_out="$($MYADMIN shutdown 2>&1)"
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r=$?
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set -e
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if [ "$r" -ne 0 ]
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then
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log_end_msg 1
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[ "$VERBOSE" != "no" ] && log_failure_msg "Error: $shutdown_out"
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log_daemon_msg "Killing MariaDB database server by signal" "mariadbd"
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killall -15 mariadbd || killall -15 mysqld
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server_down=
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for _ in {1..600}
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do
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sleep 1
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if mariadbd_status check_dead nowarn
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then
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server_down=1
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break
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fi
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done
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if test -z "$server_down"
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then
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killall -9 mariadbd || killall -9 mysqld
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fi
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fi
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fi
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if ! mariadbd_status check_dead warn
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then
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log_end_msg 1
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log_failure_msg "Please stop MariaDB manually and read /usr/share/doc/mariadb-server/README.Debian.gz!"
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exit 1
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else
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log_end_msg 0
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fi
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;;
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'restart')
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set +e; $SELF stop; set -e
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shift
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$SELF start "${@}"
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;;
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'reload'|'force-reload')
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log_daemon_msg "Reloading MariaDB database server" "mariadbd"
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$MYADMIN reload
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log_end_msg 0
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;;
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'status')
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if mariadbd_status check_alive nowarn
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then
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log_action_msg "$($MYADMIN version)"
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else
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log_action_msg "MariaDB is stopped."
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exit 3
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fi
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;;
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'bootstrap')
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# Bootstrap the cluster, start the first node
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# that initiates the cluster
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log_daemon_msg "Bootstrapping the cluster" "mariadbd"
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$SELF start "${@:2}" --wsrep-new-cluster
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;;
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*)
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echo "Usage: $SELF start|stop|restart|reload|force-reload|status"
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exit 1
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;;
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esac
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