diff options
Diffstat (limited to 'debian/mariadb-server.mariadb.init')
| -rw-r--r-- | debian/mariadb-server.mariadb.init | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/debian/mariadb-server.mariadb.init b/debian/mariadb-server.mariadb.init new file mode 100644 index 00000000..6f44c7c4 --- /dev/null +++ b/debian/mariadb-server.mariadb.init @@ -0,0 +1,298 @@ +#!/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 $time +# Default-Start: 2 3 4 5 +# Default-Stop: 0 1 6 +# Short-Description: Start and stop the MariaDB database server daemon +# Description: Controls the main MariaDB database server daemon "mariadbd" +# and its wrapper script "mysqld_safe". +### END INIT INFO +# +set -e +set -u +${DEBIAN_SCRIPT_DEBUG:+ set -v -x} + +test -x /usr/sbin/mariadbd || exit 0 + +# shellcheck source=/dev/null +. /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 + # shellcheck source=/dev/null + . /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 + # shellcheck source=/dev/null + . /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)" + + # If datadir location is not customized in configuration + # then it's not printed with /usr/sbin/mariadbd --print-defaults + # and this should fall backt to a sane default value + if [ -z "$datadir" ] + then + datadir="/var/lib/mysql" + fi + + # Verify the datadir location exists + if [ ! -d "$datadir" ] && [ ! -L "$datadir" ] + then + log_failure_msg "$0: ERROR: Can't locate MariaDB data location at $datadir" + echo "ERROR: Can't locate MariaDB data location at $datadir" | $ERR_LOGGER + exit 1 + fi + + # 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!" | $ERR_LOGGER + exit 1 + fi +} + +## Checks if there is a server running and if so if it is accessible. +# +# check_alive insists on a pingable server +# check_dead also fails if there is a lost mariadbd in the process list +# +# Usage: boolean mariadbd_status [check_alive|check_dead] [warn|nowarn] +mariadbd_status () { + ping_output="$($MYADMIN ping 2>&1)" + # The whole mariadbd_status function should be rewritten in clean shell script, + # so ignore minor Shellcheck nag for now as fixing it would be half of the + # rewrite + # shellcheck disable=SC2181 + ping_alive="$(( ! $? ))" + + ps_alive=0 + pidfile="$(mariadbd_get_param pid-file)" + if [ -f "$pidfile" ] && ps "$(cat "$pidfile")" >/dev/null 2>&1 + then + ps_alive=1 + fi + + # Using '-a' is unstandard, but it works and might be needed for the grouping + # of the if-else, so keep it and just ignore in Shellcheck + # shellcheck disable=SC2166 + 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 _ 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 "$output" + fi + else + # Try one more time but save error log separately, then spit it out + # before logging ends and init script execution ends. + if pgrep -ax mariadbd > /dev/null + then + echo "ERROR: The mariadbd process is running but not responding:" + # shellcheck disable=SC2009 + # Show the mariadbd process and it's parent and next line (if there is a child process) + ps faxu | grep mariadbd -C 1 + else + ERROR_LOG_FILE="$(mktemp).err" + echo # ensure newline + timeout --kill-after=20 10 /usr/bin/mysqld_safe "${@:2}" --log-error="$ERROR_LOG_FILE" + echo "Running '/etc/init.d/mariadb start' failed with error log:" + cat "$ERROR_LOG_FILE" + fi + + log_end_msg 1 + log_failure_msg "Please take a look at the syslog" + fi + fi + ;; + + 'stop') + # * As a passwordless mysqladmin (e.g. via ~/.my.cnf) must be possible + # at least for cron, we can rely on it here, too. (although we have + # to specify it explicit as e.g. sudo environments points to the normal + # users home and not /root) + log_daemon_msg "Stopping MariaDB database server" "mariadbd" + if ! mariadbd_status check_dead nowarn + then + set +e + shutdown_out="$($MYADMIN shutdown 2>&1)" + r=$? + set -e + if [ "$r" -ne 0 ] + then + log_end_msg 1 + [ "$VERBOSE" != "no" ] && log_failure_msg "Error: $shutdown_out" + log_daemon_msg "Killing MariaDB database server by signal" "mariadbd" + killall -15 mariadbd + server_down= + for _ in {1..600} + do + sleep 1 + if mariadbd_status check_dead nowarn + then + server_down=1 + break + fi + done + if test -z "$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 |