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