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https://github.com/MariaDB/server.git
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117 lines
3.3 KiB
Bash
117 lines
3.3 KiB
Bash
#!/bin/sh
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# Copyright (c) 2016 MariaDB Corporation
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 2 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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# This script is intended to be executed by systemd. It starts mysqld with
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# --wsrep-recover to recover from a non-graceful shutdown, determines the
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# last stored global transaction ID and echoes it in --wsrep-start-position=XX
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# format. The output is then captured and used by systemd to start mysqld.
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# If the server was configured to start without wsrep, nothing is echoed.
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cmdline_args=$@
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user="@MYSQLD_USER@"
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print_defaults="@bindir@/my_print_defaults"
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log_file=$(mktemp /tmp/wsrep_recovery.XXXXXX)
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euid=$(id -u)
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recovered_pos=""
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skipped=""
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start_pos=""
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start_pos_opt=""
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ret=0
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wsrep_on=0
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log ()
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{
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local msg="$1"
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# Print all messages to stderr as we reserve stdout for printing
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# --wsrep-start-position=XXXX.
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echo "$msg" >&2
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}
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finish()
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{
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rm -f "$log_file"
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}
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trap finish EXIT
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parse_arguments() {
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for arg do
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val=`echo "$arg" | sed -e "s;--[^=]*=;;"`
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case "$arg" in
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--wsrep[-_]on) wsrep_on=1 ;;
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--skip[-_]wsrep[-_]on) wsrep_on=0 ;;
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--wsrep[-_]on=*)
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if echo $val | grep -iq '\(ON\|1\)'; then
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wsrep_on=1
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else
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wsrep_on=0
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fi
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;;
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esac
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done
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}
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wsrep_recover_position() {
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# Redirect server's error log to the log file.
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eval @sbindir@/mariadbd $cmdline_args --user=$user --wsrep_recover \
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--disable-log-error 2> "$log_file"
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ret=$?
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if [ $ret -ne 0 ]; then
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# Something went wrong, let us also print the error log so that it
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# shows up in systemctl status output as a hint to the user.
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log "WSREP: Failed to start mysqld for wsrep recovery: '`cat $log_file`'"
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exit 1
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fi
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# Parse server's error log for recovered position. The server prints
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# "..skipping position recovery.." if started without wsrep.
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recovered_pos="$(grep -a 'WSREP: Recovered position:' $log_file)"
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if [ -z "$recovered_pos" ]; then
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skipped="$(grep -a WSREP $log_file | grep 'skipping position recovery')"
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if [ -z "$skipped" ]; then
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log "WSREP: Failed to recover position: '`cat $log_file`'"
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exit 1
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else
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log "WSREP: Position recovery skipped."
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fi
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else
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start_pos="$(echo $recovered_pos | sed 's/.*WSREP\:\ Recovered\ position://' \
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| sed 's/^[ \t]*//')"
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log "WSREP: Recovered position $start_pos"
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start_pos_opt="--wsrep_start_position=$start_pos"
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fi
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}
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# Safety checks
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if [ -n "$log_file" -a -f "$log_file" ]; then
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chmod 600 $log_file
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else
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log "WSREP: mktemp failed"
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fi
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parse_arguments `$print_defaults $cmdline_args --loose-verbose --mysqld`
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# Perform wsrep position recovery if wsrep_on=1, skip otherwise.
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if [ "$wsrep_on" -eq 1 ]; then
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wsrep_recover_position
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fi
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echo "$start_pos_opt"
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