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https://github.com/MariaDB/server.git
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04ed70fa55
To prevent accidential overwriting of files due to mysqld file descriptors being open we ensure where that only FDs 1, 2 and 3 are available to SST scripts. Assumed is mysqld has thse still mapped to stdin (unused), stdout and stderr.
289 lines
7.9 KiB
Bash
Executable file
289 lines
7.9 KiB
Bash
Executable file
# Copyright (C) 2012-2015 Codership Oy
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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; see the file COPYING. If not, write to the
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# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston
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# MA 02110-1301 USA.
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# This is a common command line parser to be sourced by other SST scripts
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# Close file descriptors numbered above 2 just in case mysqld or the
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# wsrep_provider left a file descriptor open. We don't want a broken SST
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# script or called program from overwriting a tablespace because
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# its file descriptor was left open.
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if [ -d /proc/self/fd ]; then
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for fd in /proc/self/fd/*; do
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fd=${fd##*/}
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# While bash would support the below syntax other sh's don't
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#[ $fd -gt 2 ] && exec {fd}>&-
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[ $fd -gt 2 ] && eval "exec ${fd}>&-" 2> /dev/null
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done
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else
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upper_no_file=$(ulimit -n)
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[ "$upper_no_file" = "unlimited" ] || [ -z "$upper_no_file" ] && upper_no_file=1024
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while [ $upper_no_file -gt 2 ]
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do
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eval "exec ${upper_no_file}>&-"
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upper_no_file=$(( "$upper_no_file" - 1 ))
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done
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fi
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set -u
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WSREP_SST_OPT_BYPASS=0
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WSREP_SST_OPT_BINLOG=""
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WSREP_SST_OPT_DATA=""
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WSREP_SST_OPT_AUTH=${WSREP_SST_OPT_AUTH:-}
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WSREP_SST_OPT_USER=${WSREP_SST_OPT_USER:-}
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WSREP_SST_OPT_PSWD=${WSREP_SST_OPT_PSWD:-}
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WSREP_SST_OPT_DEFAULT=""
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WSREP_SST_OPT_EXTRA_DEFAULT=""
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WSREP_SST_OPT_SUFFIX_DEFAULT=""
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while [ $# -gt 0 ]; do
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case "$1" in
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'--address')
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readonly WSREP_SST_OPT_ADDR="$2"
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#
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# Break address string into host:port/path parts
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#
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readonly WSREP_SST_OPT_HOST=${WSREP_SST_OPT_ADDR%%[:/]*}
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readonly WSREP_SST_OPT_HOST_UNESCAPED=`echo "$WSREP_SST_OPT_HOST"|awk '{if(match($0,/^\[.*\]$/)) $0=substr($0,2,RLENGTH-2);print}'`
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readonly WSREP_SST_OPT_ADDR_PORT=$(echo $WSREP_SST_OPT_ADDR | \
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cut -d ']' -f 2 | cut -s -d ':' -f 2 | cut -d '/' -f 1)
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readonly WSREP_SST_OPT_PATH=${WSREP_SST_OPT_ADDR#*/}
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readonly WSREP_SST_OPT_MODULE=${WSREP_SST_OPT_PATH%%/*}
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remain=${WSREP_SST_OPT_PATH#*/}
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readonly WSREP_SST_OPT_LSN=${remain%%/*}
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remain=${remain#*/}
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readonly WSREP_SST_OPT_SST_VER=${remain%%/*}
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shift
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;;
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'--bypass')
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WSREP_SST_OPT_BYPASS=1
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;;
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'--datadir')
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readonly WSREP_SST_OPT_DATA="$2"
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shift
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;;
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'--defaults-file')
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readonly WSREP_SST_OPT_DEFAULT="$1=$2"
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shift
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;;
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'--defaults-extra-file')
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readonly WSREP_SST_OPT_EXTRA_DEFAULT="$1=$2"
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shift
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;;
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'--defaults-group-suffix')
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readonly WSREP_SST_OPT_SUFFIX_DEFAULT="$1=$2"
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shift
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;;
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'--host')
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readonly WSREP_SST_OPT_HOST="$2"
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shift
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;;
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'--local-port')
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readonly WSREP_SST_OPT_LPORT="$2"
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shift
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;;
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'--parent')
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readonly WSREP_SST_OPT_PARENT="$2"
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shift
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;;
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'--password')
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WSREP_SST_OPT_PSWD="$2"
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shift
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;;
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'--port')
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readonly WSREP_SST_OPT_PORT="$2"
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shift
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;;
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'--role')
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readonly WSREP_SST_OPT_ROLE="$2"
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shift
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;;
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'--socket')
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readonly WSREP_SST_OPT_SOCKET="$2"
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shift
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;;
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'--user')
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WSREP_SST_OPT_USER="$2"
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shift
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;;
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'--gtid')
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readonly WSREP_SST_OPT_GTID="$2"
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shift
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;;
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'--binlog')
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WSREP_SST_OPT_BINLOG="$2"
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shift
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;;
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'--gtid-domain-id')
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readonly WSREP_SST_OPT_GTID_DOMAIN_ID="$2"
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shift
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;;
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*) # must be command
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# usage
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# exit 1
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;;
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esac
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shift
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done
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readonly WSREP_SST_OPT_BYPASS
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readonly WSREP_SST_OPT_BINLOG
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if [ -n "${WSREP_SST_OPT_ADDR:-}" ]; then
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if [ -n "${WSREP_SST_OPT_PORT:-}" ]; then
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if [ -n "$WSREP_SST_OPT_ADDR_PORT" -a "$WSREP_SST_OPT_PORT" != "$WSREP_SST_OPT_ADDR_PORT" ]; then
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wsrep_log_error "port in --port=$WSREP_SST_OPT_PORT differs from port in --address=$WSREP_SST_OPT_ADDR"
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exit 2
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fi
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else
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readonly WSREP_SST_OPT_PORT="$WSREP_SST_OPT_ADDR_PORT"
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fi
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fi
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# try to use my_print_defaults, mysql and mysqldump that come with the sources
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# (for MTR suite)
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SCRIPTS_DIR="$(cd $(dirname "$0"); pwd -P)"
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EXTRA_DIR="$SCRIPTS_DIR/../extra"
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CLIENT_DIR="$SCRIPTS_DIR/../client"
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if [ -x "$CLIENT_DIR/mysql" ]; then
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MYSQL_CLIENT="$CLIENT_DIR/mysql"
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else
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MYSQL_CLIENT=mysql
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fi
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if [ -x "$CLIENT_DIR/mysqldump" ]; then
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MYSQLDUMP="$CLIENT_DIR/mysqldump"
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else
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MYSQLDUMP=mysqldump
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fi
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if [ -x "$SCRIPTS_DIR/my_print_defaults" ]; then
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MY_PRINT_DEFAULTS="$SCRIPTS_DIR/my_print_defaults"
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elif [ -x "$EXTRA_DIR/my_print_defaults" ]; then
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MY_PRINT_DEFAULTS="$EXTRA_DIR/my_print_defaults"
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else
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MY_PRINT_DEFAULTS=my_print_defaults
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fi
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readonly WSREP_SST_OPT_CONF="$WSREP_SST_OPT_DEFAULT $WSREP_SST_OPT_EXTRA_DEFAULT $WSREP_SST_OPT_SUFFIX_DEFAULT"
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readonly MY_PRINT_DEFAULTS="$MY_PRINT_DEFAULTS $WSREP_SST_OPT_CONF"
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wsrep_auth_not_set()
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{
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[ -z "$WSREP_SST_OPT_AUTH" -o "$WSREP_SST_OPT_AUTH" = "(null)" ]
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}
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# State Snapshot Transfer authentication password was displayed in the ps output. Bug fixed #1200727.
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if $MY_PRINT_DEFAULTS sst | grep -q "wsrep_sst_auth"; then
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if wsrep_auth_not_set; then
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WSREP_SST_OPT_AUTH=$($MY_PRINT_DEFAULTS sst | grep -- "--wsrep_sst_auth" | cut -d= -f2)
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fi
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fi
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readonly WSREP_SST_OPT_AUTH
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# Splitting AUTH into potential user:password pair
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if ! wsrep_auth_not_set
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then
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WSREP_SST_OPT_USER="${WSREP_SST_OPT_AUTH%%:*}"
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WSREP_SST_OPT_PSWD="${WSREP_SST_OPT_AUTH##*:}"
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fi
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readonly WSREP_SST_OPT_USER
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readonly WSREP_SST_OPT_PSWD
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if [ -n "${WSREP_SST_OPT_DATA:-}" ]
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then
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SST_PROGRESS_FILE="$WSREP_SST_OPT_DATA/sst_in_progress"
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else
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SST_PROGRESS_FILE=""
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fi
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wsrep_log()
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{
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# echo everything to stderr so that it gets into common error log
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# deliberately made to look different from the rest of the log
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local readonly tst="$(date +%Y%m%d\ %H:%M:%S.%N | cut -b -21)"
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echo "WSREP_SST: $* ($tst)" >&2
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}
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wsrep_log_error()
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{
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wsrep_log "[ERROR] $*"
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}
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wsrep_log_warning()
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{
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wsrep_log "[WARNING] $*"
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}
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wsrep_log_info()
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{
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wsrep_log "[INFO] $*"
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}
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wsrep_cleanup_progress_file()
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{
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[ -n "${SST_PROGRESS_FILE:-}" ] && rm -f "$SST_PROGRESS_FILE" 2>/dev/null || true
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}
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wsrep_check_program()
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{
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local prog=$1
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if ! command -v $prog >/dev/null
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then
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echo "'$prog' not found in PATH"
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exit 2 # ENOENT no such file or directory
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fi
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}
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wsrep_check_programs()
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{
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local ret=0
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while [ $# -gt 0 ]
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do
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wsrep_check_program $1
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shift
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done
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}
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#
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# user can specify xtrabackup specific settings that will be used during sst
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# process like encryption, etc.....
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# parse such configuration option. (group for xb settings is [sst] in my.cnf
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#
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# 1st param: group (config file section like sst) or my_print_defaults argument (like --mysqld)
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# 2nd param: var : name of the variable in the section, e.g. server-id
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# 3rd param: - : default value for the param
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parse_cnf()
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{
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local group=$1
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local var=$2
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local reval=""
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# normalize the variable names specified in cnf file (user can use _ or - for example log-bin or log_bin)
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# then search for needed variable
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# finally get the variable value (if variables has been specified multiple time use the last value only)
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reval=$($MY_PRINT_DEFAULTS "${group}" | awk -v var="${var}" 'BEGIN { OFS=FS="=" } { gsub(/_/,"-",$1); if ( $1=="--"var) lastval=substr($0,length($1)+2) } END { print lastval}')
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# use default if we haven't found a value
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if [ -z $reval ]; then
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[ -n $3 ] && reval=$3
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fi
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echo $reval
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}
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