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#!/bin/bash | |
# | |
### BEGIN INIT INFO | |
# Provides: mysql | |
# Required-Start: $remote_fs $syslog | |
# Required-Stop: $remote_fs $syslog | |
# Should-Start: $network $time | |
# Should-Stop: $network $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 MySQL database server daemon "mysqld" | |
# and its wrapper script "mysqld_safe". | |
### END INIT INFO | |
# | |
set -e | |
set -u | |
${DEBIAN_SCRIPT_DEBUG:+ set -v -x} | |
test -x /usr/bin/mysqld_safe || exit 0 | |
. /lib/lsb/init-functions | |
SELF=$(cd $(dirname $0); pwd -P)/$(basename $0) | |
CONF=/etc/mysql/my.cnf | |
MYADMIN="/usr/bin/mysqladmin --defaults-file=/etc/mysql/debian.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() { | |
/usr/sbin/mysqld --print-defaults \ | |
| tr " " "\n" \ | |
| grep -- "--$1" \ | |
| tail -n 1 \ | |
| cut -d= -f2 | |
} | |
## Do some sanity checks before even trying to start mysqld. | |
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=`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!" | $ERR_LOGGER | |
exit 1 | |
fi | |
} | |
## Checks if there is a server running and if so if it is accessible. | |
# | |
# check_alive insists on a pingable server | |
# check_dead also fails if there is a lost mysqld in the process list | |
# | |
# Usage: boolean mysqld_status [check_alive|check_dead] [warn|nowarn] | |
mysqld_status () { | |
ping_output=`$MYADMIN ping 2>&1`; ping_alive=$(( ! $? )) | |
ps_alive=0 | |
pidfile=`mysqld_get_param pid-file` | |
if [ -f "$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 MySQL database server" "mysqld" | |
if mysqld_status check_alive nowarn; then | |
log_progress_msg "already running" | |
log_end_msg 0 | |
else | |
# Could be removed during boot | |
test -e /var/run/mysqld || install -m 755 -o mysql -g root -d /var/run/mysqld | |
# Start MySQL! | |
su - mysql -s /bin/sh -c "/usr/bin/mysqld_safe > /dev/null 2>&1 &" | |
# 6s was reported in #352070 to be too few when using ndbcluster | |
# 14s was reported in #736452 to be too few with large installs | |
for i in $(seq 1 30); do | |
sleep 1 | |
if mysqld_status check_alive nowarn ; then break; fi | |
log_progress_msg "." | |
done | |
if mysqld_status check_alive warn; then | |
log_end_msg 0 | |
# Now start mysqlcheck or whatever the admin wants. | |
output=$(/etc/mysql/debian-start) | |
[ -n "$output" ] && log_action_msg "$output" | |
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 MySQL database server" "mysqld" | |
if ! mysqld_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: $shutdown_out" | |
log_daemon_msg "Killing MySQL database server by signal" "mysqld" | |
killall -15 mysqld | |
server_down= | |
for i in 1 2 3 4 5 6 7 8 9 10; do | |
sleep 1 | |
if mysqld_status check_dead nowarn; then server_down=1; break; fi | |
done | |
if test -z "$server_down"; then killall -9 mysqld; fi | |
fi | |
fi | |
if ! mysqld_status check_dead warn; then | |
log_end_msg 1 | |
log_failure_msg "Please stop MySQL manually and read /usr/share/doc/mysql-server-5.7/README.Debian.gz!" | |
exit -1 | |
else | |
log_end_msg 0 | |
fi | |
;; | |
'restart') | |
set +e; $SELF stop; set -e | |
$SELF start | |
;; | |
'reload'|'force-reload') | |
log_daemon_msg "Reloading MySQL database server" "mysqld" | |
$MYADMIN reload | |
log_end_msg 0 | |
;; | |
'status') | |
if mysqld_status check_alive nowarn; then | |
log_action_msg "$($MYADMIN version)" | |
else | |
log_action_msg "MySQL is stopped." | |
exit 3 | |
fi | |
;; | |
*) | |
echo "Usage: $SELF start|stop|restart|reload|force-reload|status" | |
exit 1 | |
;; | |
esac | |
# Some success paths end up returning non-zero so exit 0 explicitly. See | |
# bug #739846. | |
exit 0 |
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$ cat /etc/os-release | |
NAME="Ubuntu" | |
VERSION="20.04.3 LTS (Focal Fossa)" | |
ID=ubuntu | |
ID_LIKE=debian | |
PRETTY_NAME="Ubuntu 20.04.3 LTS" | |
VERSION_ID="20.04" | |
HOME_URL="https://www.ubuntu.com/" | |
SUPPORT_URL="https://help.ubuntu.com/" | |
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/" | |
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy" | |
VERSION_CODENAME=focal | |
UBUNTU_CODENAME=focal | |
$ mysqld --version | |
/usr/sbin/mysqld Ver 8.0.26-0ubuntu0.20.04.2 for Linux on x86_64 ((Ubuntu)) | |
$ sudo service mysql start | |
* Starting MySQL database server mysqld | |
su: warning: cannot change directory to /nonexistent: No such file or directory | |
[ OK ] | |
$ sudo service mysql status | |
* /usr/bin/mysqladmin Ver 8.0.26-0ubuntu0.20.04.2 for Linux on x86_64 ((Ubuntu)) | |
Copyright (c) 2000, 2021, Oracle and/or its affiliates. | |
Oracle is a registered trademark of Oracle Corporation and/or its | |
affiliates. Other names may be trademarks of their respective | |
owners. | |
Server version 8.0.26-0ubuntu0.20.04.2 | |
Protocol version 10 | |
Connection Localhost via UNIX socket | |
UNIX socket /var/run/mysqld/mysqld.sock | |
Uptime: 8 sec | |
Threads: 2 Questions: 8 Slow queries: 0 Opens: 436 Flush tables: 3 Open tables: 27 Queries per second avg: 1.000 | |
$ |
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