/etc/init.d/mysql is in percona-xtradb-cluster-server-5.7 5.7.20-29.24-0ubuntu2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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#
### BEGIN INIT INFO
# Provides: mysql
# 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 (Percona XtraDB Cluster) daemon
# Description: Controls the main MySQL (Percona XtraDB Cluster) daemon "mysqld"
# and its wrapper script "mysqld_safe".
### END INIT INFO
#
set -e
set -u
# source the defauts file /etc/default/mysql if it exists for any environment variables.
# set -a is done so that 'FOO=BAR' just be used than 'export FOO=BAR' in the /etc/default/mysql.
# However, export FOO=BAR in that file also should work.
set -a
[ -r /etc/default/mysql ] && . /etc/default/mysql
set +a
${DEBIAN_SCRIPT_DEBUG:+ set -v -x}
PERCONA_PREFIX=/usr
startup_timeout=900
stop_timeout=300
startup_sleep=1
test -x "${PERCONA_PREFIX}"/sbin/mysqld || exit 0
. /lib/lsb/init-functions
SELF=$(cd $(dirname $0); pwd -P)/$(basename $0)
CONF=/etc/mysql/my.cnf
# priority can be overriden and "-s" adds output to stderr
ERR_LOGGER="logger -p daemon.err -t /etc/init.d/mysql -i"
# Safeguard (relative paths, core dumps..)
cd /
umask 077
# mysqladmin likes to read /root/.my.cnf. This is usually not what I want
# as many admins e.g. only store a password without a username there and
# so break my scripts.
export HOME=/etc/mysql/
## Fetch a particular option from mysql's invocation.
#
# Usage: void mysqld_get_param option
mysqld_get_param() {
"${PERCONA_PREFIX}"/sbin/mysqld --print-defaults \
| tr " " "\n" | awk -F= '{if ($1 ~ /_/) { gsub(/_/,"-",$1); print $1"="$2 } else { print $0 }}' \
| grep -- "--$1=" \
| tail -n 1 \
| cut -d= -f2
}
## Do some sanity checks before even trying to start mysqld.
sanity_checks() {
# check for config file
# DISABLED: We do not install my.cnf
#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=`mysqld_get_param datadir`
if LC_ALL=C BLOCKSIZE= df --portability $datadir/. | tail -n 1 | awk '{ exit ($4>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
if test -e $sst_progress_file;then
log_daemon_msg "Stale sst_in_progress file in datadir" "mysqld"
fi
}
# Get the pid file
mysql_data_dir=$(mysqld_get_param datadir)
[ ! $mysql_data_dir ] && mysql_data_dir="/var/lib/percona-xtradb-cluster"
pid_file=$(mysqld_get_param pid-file)
if test -z "$pid_file"
then
pid_file="$mysql_data_dir/$(hostname).pid"
else
case "$pid_file" in
/* ) ;;
* ) pid_file="$mysql_data_dir/$pid_file" ;;
esac
fi
sst_progress_file=$mysql_data_dir/sst_in_progress
## Checks if there is a server running and if so if it is accessible.
#
# check_alive insists on a pingable server
# check_dead also fails if there is a lost mysqld in the process list
#
# Usage: boolean mysqld_status [check_alive|check_dead] [warn|nowarn]
mysqld_status () {
mysqld_pid=$(cat $pid_file 2>/dev/null)
if [ ! $mysqld_pid ];then
echo "MySQL PID not found, pid_file detected/guessed: $pid_file" | $ERR_LOGGER
if [ "$1" = "check_dead" ]; then
return 0
fi
return 1
fi
ping_alive=1
ps_alive=0
if ! mysqladmin ping &>/dev/null;then
ping_alive=0
fi
/bin/kill -0 $mysqld_pid &>/dev/null && ps_alive=1
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
warn_msg=
[ $ping_alive = 0 ] && warn_msg+="mysql ping failed"
[ $ps_alive = 0 ] && \
warn_msg+=" and/or mysqld with pid $mysqld_pid is not alive"
echo -e "$warn_msg" | $ERR_LOGGER -p daemon.debug
fi
return 1 # EXIT_FAILURE
fi
}
log_startup_failure() {
local msg="$@"
if test -e $sst_progress_file;then
msg+=" However, State transfer is still in progress. Please check if mysqld is running."
fi
log_failure_msg "$msg"
}
#
# main()
#
case "${1:-''}" in
'start')
sanity_checks;
# Start daemon
log_daemon_msg "Starting MySQL (Percona XtraDB Cluster) database server" "mysqld"
if mysqld_status check_alive nowarn; then
log_progress_msg "already running"
log_end_msg 0
else
if [[ -r $pid_file ]]; then
log_warning_msg "Stale PID file found: $pid_file with $(cat $pid_file)"
fi
extra_args="${2:-}"
if [[ -z "$extra_args" ]]; then
"${PERCONA_PREFIX}"/bin/mysqld_safe > /dev/null 2>&1 &
else
"${PERCONA_PREFIX}"/bin/mysqld_safe $extra_args > /dev/null 2>&1 &
fi
safe_pid=$!
avoid_race_condition="by checking again"
for i in `seq 1 $startup_timeout`; do
if test -e $sst_progress_file && [ $startup_sleep -ne 10 ];then
log_daemon_msg "State transfer in progress, setting sleep higher" "mysqld"
startup_sleep=10
fi
# if server isn't running, then pid-file will never be updated
if test -n "$safe_pid"; then
if kill -0 "$safe_pid" 2>/dev/null; then
set +e
test -s $pid_file && kill -0 $(cat $pid_file) 2>/dev/null && break
set -e
else
# The server may have exited between the last pid-file check and now.
if test -n "$avoid_race_condition"; then
avoid_race_condition=""
continue # Check again.
fi
log_failure_msg "The server quit without updating PID file ($pid_file)."
log_end_msg 1
exit 1 # not waiting any more.
fi
fi
sleep $startup_sleep
log_progress_msg "."
done
sleep 1
if mysqld_status check_alive warn; then
log_end_msg 0
else
log_startup_failure "Please take a look at the syslog."
log_end_msg 1
fi
fi
;;
'stop'|'bootstrap-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 MySQL (Percona XtraDB Cluster)" "mysqld"
if ! mysqld_status check_dead nowarn; then
set +e
shutdown_out=`kill $mysqld_pid 2>&1`; r=$?
set -e
if [ "$r" -ne 0 ]; then
log_end_msg 1
log_daemon_msg "MySQLd already dead" "mysqld"
else
server_down=
for i in `seq 1 $stop_timeout`; do
sleep 1
if mysqld_status check_dead nowarn; then server_down=1; break; fi
done
#Better to not kill in cases of large buffer pools
#if test -z "$server_down"; then
#kill -9 $mysqld_pid
#fi
fi
fi
if ! mysqld_status check_dead warn; then
log_end_msg 1
log_failure_msg "Please stop MySQL (Percona XtraDB Cluster) manually and \
read /usr/share/doc/percona-xtradb-cluster-server-5.7/README.Debian.gz!"
exit -1
else
log_end_msg 0
fi
;;
'restart')
set +e; $SELF stop; set -e
$SELF start
;;
'restart-bootstrap')
set +e; $SELF stop; set -e
$SELF bootstrap-pxc
;;
'reload'|'force-reload'|'reload-bootstrap')
log_daemon_msg "Reloading MySQL (Percona XtraDB Cluster)" "mysqld"
mysqld_pid=$(cat $pid_file 2>/dev/null)
if [ ! $mysqld_pid ];then
log_failure_msg "MySQL PID not found, pid_file detected/guessed: $pid_file"
log_end_msg 1
exit 4
fi
if kill -HUP $mysqld_pid 2>/dev/null;then
log_daemon_msg "Percona XtraDB Cluster reload complete" "mysqld"
log_end_msg 0
else
log_failure_msg "Percona XtraDB Cluster with PID $mysqld_pid \
is not running or unknown error"
log_end_msg 1
fi
;;
'status'|'status-bootstrap')
if mysqld_status check_alive nowarn; then
log_action_msg "Percona XtraDB Cluster up and running"
else
log_action_msg "MySQL (Percona XtraDB Cluster) is stopped. Check log"
exit 3
fi
;;
'bootstrap-pxc')
startup_sleep=10
sanity_checks;
# Start daemon
log_daemon_msg "Bootstrapping Percona XtraDB Cluster database server" "mysqld"
if mysqld_status check_alive nowarn; then
log_progress_msg "already running"
log_end_msg 0
else
if [[ -r $pid_file ]];then
log_warning_msg "Stale PID file found: $pid_file with $(cat $pid_file)"
fi
"${PERCONA_PREFIX}"/bin/mysqld_safe --wsrep-new-cluster > /dev/null 2>&1 &
safe_pid=$!
avoid_race_condition="by checking again"
for i in `seq 1 $startup_timeout`; do
if test -e $sst_progress_file && [ $startup_sleep -ne 10 ];then
log_daemon_msg "State transfer in progress, setting sleep higher" "mysqld"
startup_sleep=10
fi
# if server isn't running, then pid-file will never be updated
if test -n "$safe_pid"; then
if kill -0 "$safe_pid" 2>/dev/null; then
set +e
test -s $pid_file && kill -0 $(cat $pid_file) 2>/dev/null && break
set -e
else
# The server may have exited between the last pid-file check and now.
if test -n "$avoid_race_condition"; then
avoid_race_condition=""
continue # Check again.
fi
log_failure_msg "The server quit without updating PID file ($pid_file)."
log_end_msg 1
exit 1 # not waiting any more.
fi
fi
sleep $startup_sleep
log_progress_msg "."
done
sleep 1
if mysqld_status check_alive warn; then
log_end_msg 0
else
log_startup_failure "Please take a look at the syslog."
log_end_msg 1
fi
fi
;;
*)
echo "Usage: $SELF start|stop|restart|restart-bootstrap|reload|force-reload|status|bootstrap-pxc"
exit 1
;;
esac
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