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493 lines
15 KiB
493 lines
15 KiB
#!/bin/bash -ue
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# Copyright (C) 2010-2014 Codership Oy
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# Copyright (C) 2017-2020 Damien Ciabrini <damien.ciabrini@gmail.com>
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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 reference script for rsync-based state snapshot tansfer
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# over an encrypted communication channel, managed by socat
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RSYNC_PID= # rsync pid file
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RSYNC_CONF= # rsync configuration file
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RSYNC_REAL_PID= # rsync process id
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SOCAT_PID= # socat pid file
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SOCAT_REAL_PID= # socat process id
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SOCAT_OPTS= # openssl connection args
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MODULE="rsync_tunnel_sst"
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OS=$(uname)
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[ "$OS" == "Darwin" ] && export -n LD_LIBRARY_PATH
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# Setting the path for lsof on CentOS
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export PATH="/usr/sbin:/sbin:$PATH"
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. $(dirname $0)/wsrep_sst_common
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wsrep_check_programs rsync socat
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cleanup_pid()
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{
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local real_pid=$1
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[ "0" != "$real_pid" ] && \
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kill $real_pid && \
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sleep 0.5 && \
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kill -9 $real_pid >/dev/null 2>&1 || \
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:
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}
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cleanup_tunnel()
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{
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if [ -n "$SOCAT_REAL_PID" ] && ps -p "$SOCAT_REAL_PID" >/dev/null 2>&1; then
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wsrep_log_info "cleanup socat PID: $SOCAT_REAL_PID"
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cleanup_pid $SOCAT_REAL_PID
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fi
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rm -rf "$SOCAT_PID"
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}
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cleanup_joiner()
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{
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wsrep_log_info "Joiner cleanup. rsync PID: $RSYNC_REAL_PID"
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[ -n "$RSYNC_REAL_PID" ] && cleanup_pid $RSYNC_REAL_PID
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rm -rf "$RSYNC_CONF"
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rm -rf "$MAGIC_FILE"
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rm -rf "$RSYNC_PID"
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cleanup_tunnel
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wsrep_log_info "Joiner cleanup done."
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if [ "${WSREP_SST_OPT_ROLE}" = "joiner" ];then
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wsrep_cleanup_progress_file
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fi
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}
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# Check whether process is still running.
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check_pid()
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{
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local pid_file=$1
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[ -r "$pid_file" ] && ps -p $(cat $pid_file) >/dev/null 2>&1
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}
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check_pid_and_port()
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{
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local pid_file=$1
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local service_pid=$2
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local service_port=$3
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local service_host=$4
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local service_name=$5
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if ! which lsof > /dev/null; then
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wsrep_log_error "lsof tool not found in PATH! Make sure you have it installed."
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exit 2 # ENOENT
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fi
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local port_info=$(lsof -i "@"$service_host:$service_port -Pn 2>/dev/null | \
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grep "(LISTEN)")
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local is_service=$(echo $port_info | \
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grep -w '^'"$service_name"'[[:space:]]\+'"$service_pid" 2>/dev/null)
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if [ -n "$port_info" -a -z "$is_service" ]; then
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wsrep_log_error "$service_name daemon port '$service_port' has been taken"
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exit 16 # EBUSY
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fi
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if ! check_pid $pid_file; then
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wsrep_log_error "$service_name process terminated unexpectedly"
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exit 10 # ECHILD
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fi
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[ -n "$port_info" ] && [ -n "$is_service" ] && \
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[ $(cat $pid_file) -eq $service_pid ]
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}
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config_from_cnf()
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{
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local group=$1
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local key=$2
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echo $($MY_PRINT_DEFAULTS $group | grep -- "--$key=" | cut -d= -f2- | tail -1)
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}
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setup_tunnel_args()
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{
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tca=$(config_from_cnf sst tca)
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tkey=$(config_from_cnf sst tkey)
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tcert=$(config_from_cnf sst tcert)
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sockopt=$(config_from_cnf sst sockopt)
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if [ -z "$tcert" ]; then
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wsrep_log_error "Encryption certificate not found in my.cnf"
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exit 3
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else
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SOCAT_OPTS="cert=$tcert"
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fi
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[ -n "$tkey" ] && SOCAT_OPTS="$SOCAT_OPTS,key=$tkey"
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[ -n "$tca" ] && SOCAT_OPTS="$SOCAT_OPTS,cafile=$tca"
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wsrep_log_info "Encryption setting to be used for socat tunnel: $SOCAT_OPTS"
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[ -n "$sockopt" ] && SOCAT_OPTS="$SOCAT_OPTS,$sockopt"
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}
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MAGIC_FILE="$WSREP_SST_OPT_DATA/rsync_tunnel_sst_complete"
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rm -rf "$MAGIC_FILE"
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BINLOG_TAR_FILE="$WSREP_SST_OPT_DATA/wsrep_sst_binlog.tar"
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BINLOG_N_FILES=1
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rm -f "$BINLOG_TAR_FILE" || :
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if ! [ -z $WSREP_SST_OPT_BINLOG ]
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then
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BINLOG_DIRNAME=$(dirname $WSREP_SST_OPT_BINLOG)
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BINLOG_FILENAME=$(basename $WSREP_SST_OPT_BINLOG)
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fi
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WSREP_LOG_DIR=${WSREP_LOG_DIR:-""}
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# if WSREP_LOG_DIR env. variable is not set, try to get it from my.cnf
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if [ -z "$WSREP_LOG_DIR" ]; then
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WSREP_LOG_DIR=$($MY_PRINT_DEFAULTS --mysqld \
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| grep -- '--innodb[-_]log[-_]group[-_]home[-_]dir=' \
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| cut -b 29- )
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fi
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if [ -n "$WSREP_LOG_DIR" ]; then
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# handle both relative and absolute paths
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WSREP_LOG_DIR=$(cd $WSREP_SST_OPT_DATA; mkdir -p "$WSREP_LOG_DIR"; cd $WSREP_LOG_DIR; pwd -P)
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else
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# default to datadir
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WSREP_LOG_DIR=$(cd $WSREP_SST_OPT_DATA; pwd -P)
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fi
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# Old filter - include everything except selected
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# FILTER=(--exclude '*.err' --exclude '*.pid' --exclude '*.sock' \
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# --exclude '*.conf' --exclude core --exclude 'galera.*' \
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# --exclude grastate.txt --exclude '*.pem' \
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# --exclude '*.[0-9][0-9][0-9][0-9][0-9][0-9]' --exclude '*.index')
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# New filter - exclude everything except dirs (schemas) and innodb files
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FILTER=(-f '- /lost+found' -f '- /.fseventsd' -f '- /.Trashes'
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-f '+ /wsrep_sst_binlog.tar' -f '+ /ib_lru_dump' -f '+ /ibdata*' -f '+ /*/' -f '- /*')
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SOCAT_PID="$WSREP_SST_OPT_DATA/$MODULE-socat.pid"
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if check_pid $SOCAT_PID
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then
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wsrep_log_error "socat tunnel already running."
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exit 114 # EALREADY
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fi
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rm -rf "$SOCAT_PID"
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setup_tunnel_args
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if [ "$WSREP_SST_OPT_ROLE" = "donor" ]
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then
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SOCAT_JOINER_ADDR=$(echo $WSREP_SST_OPT_ADDR | awk -F'/' '{print $1}')
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# map to name in case we received an IP
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SOCAT_JOINER_HOST=$(getent hosts $SOCAT_JOINER_ADDR | awk '{ print $2 }')
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if [ -z "$SOCAT_JOINER_HOST" ]; then
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SOCAT_JOINER_HOST=$SOCAT_JOINER_ADDR
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fi
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SOCAT_PORT=$(echo $SOCAT_JOINER_ADDR | awk -F ':' '{ print $2 }')
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if [ -z "$SOCAT_PORT" ]
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then
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SOCAT_PORT=4444
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fi
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TARGET_ADDR=localhost:$SOCAT_PORT/$MODULE
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trap cleanup_tunnel EXIT
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# Socat forwards rsync connections to the joiner
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SOCAT_SRC=tcp-listen:$SOCAT_PORT,bind=localhost,reuseaddr,fork
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SOCAT_DST=openssl:$SOCAT_JOINER_HOST,$SOCAT_OPTS
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wsrep_log_info "Setting up tunnel for donor: socat $SOCAT_SRC $SOCAT_DST"
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socat $SOCAT_SRC $SOCAT_DST &
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SOCAT_REAL_PID=$!
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# This is ok because a local galera node doesn't run SST concurrently
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echo $SOCAT_REAL_PID >"$SOCAT_PID"
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until check_pid_and_port $SOCAT_PID $SOCAT_REAL_PID $SOCAT_PORT localhost "socat"
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do
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sleep 0.2
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done
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if [ $WSREP_SST_OPT_BYPASS -eq 0 ]
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then
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FLUSHED="$WSREP_SST_OPT_DATA/tables_flushed"
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ERROR="$WSREP_SST_OPT_DATA/sst_error"
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rm -rf "$FLUSHED"
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rm -rf "$ERROR"
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# Use deltaxfer only for WAN
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inv=$(basename $0)
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[ "$inv" = "wsrep_sst_rsync_wan" ] && WHOLE_FILE_OPT="" \
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|| WHOLE_FILE_OPT="--whole-file"
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echo "flush tables"
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# Wait for :
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# (a) Tables to be flushed, AND
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# (b) Cluster state ID & wsrep_gtid_domain_id to be written to the file, OR
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# (c) ERROR file, in case flush tables operation failed.
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while [ ! -r "$FLUSHED" ] && ! grep -q ':' "$FLUSHED" >/dev/null 2>&1
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do
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# Check whether ERROR file exists.
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if [ -f "$ERROR" ]
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then
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# Flush tables operation failed.
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rm -rf "$ERROR"
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exit 255
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fi
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sleep 0.2
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done
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STATE="$(cat $FLUSHED)"
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rm -rf "$FLUSHED"
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sync
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if ! [ -z $WSREP_SST_OPT_BINLOG ]
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then
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# Prepare binlog files
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pushd $BINLOG_DIRNAME &> /dev/null
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binlog_files_full=$(tail -n $BINLOG_N_FILES ${BINLOG_FILENAME}.index)
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binlog_files=""
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for ii in $binlog_files_full
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do
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binlog_files="$binlog_files $(basename $ii)"
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done
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if ! [ -z "$binlog_files" ]
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then
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wsrep_log_info "Preparing binlog files for transfer:"
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tar -cvf $BINLOG_TAR_FILE $binlog_files >&2
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fi
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popd &> /dev/null
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fi
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# first, the normal directories, so that we can detect incompatible protocol
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RC=0
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rsync --owner --group --perms --links --specials \
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--ignore-times --inplace --dirs --delete --quiet \
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$WHOLE_FILE_OPT "${FILTER[@]}" "$WSREP_SST_OPT_DATA/" \
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rsync://$TARGET_ADDR >&2 || RC=$?
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if [ "$RC" -ne 0 ]; then
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wsrep_log_error "rsync returned code $RC:"
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case $RC in
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12) RC=71 # EPROTO
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wsrep_log_error \
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"rsync server on the other end has incompatible protocol. " \
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"Make sure you have the same version of rsync on all nodes."
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;;
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22) RC=12 # ENOMEM
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;;
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*) RC=255 # unknown error
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;;
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esac
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exit $RC
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fi
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# second, we transfer InnoDB log files
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rsync --owner --group --perms --links --specials \
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--ignore-times --inplace --dirs --delete --quiet \
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$WHOLE_FILE_OPT -f '+ /ib_logfile[0-9]*' -f '- **' "$WSREP_LOG_DIR/" \
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rsync://$TARGET_ADDR-log_dir >&2 || RC=$?
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if [ $RC -ne 0 ]; then
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wsrep_log_error "rsync innodb_log_group_home_dir returned code $RC:"
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exit 255 # unknown error
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fi
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# then, we parallelize the transfer of database directories, use . so that pathconcatenation works
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pushd "$WSREP_SST_OPT_DATA" >/dev/null
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count=1
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[ "$OS" == "Linux" ] && count=$(grep -c processor /proc/cpuinfo)
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[ "$OS" == "Darwin" -o "$OS" == "FreeBSD" ] && count=$(sysctl -n hw.ncpu)
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find . -maxdepth 1 -mindepth 1 -type d -not -name "lost+found" -print0 | \
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xargs -I{} -0 -P $count \
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rsync --owner --group --perms --links --specials \
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--ignore-times --inplace --recursive --delete --quiet \
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$WHOLE_FILE_OPT --exclude '*/ib_logfile*' "$WSREP_SST_OPT_DATA"/{}/ \
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rsync://$TARGET_ADDR/{} >&2 || RC=$?
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popd >/dev/null
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if [ $RC -ne 0 ]; then
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wsrep_log_error "find/rsync returned code $RC:"
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exit 255 # unknown error
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fi
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else # BYPASS
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wsrep_log_info "Bypassing state dump."
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# Store donor's wsrep GTID (state ID) and wsrep_gtid_domain_id
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# (separated by a space).
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STATE="$WSREP_SST_OPT_GTID $WSREP_SST_OPT_GTID_DOMAIN_ID"
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fi
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echo "continue" # now server can resume updating data
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echo "$STATE" > "$MAGIC_FILE"
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rsync --archive --quiet --checksum "$MAGIC_FILE" rsync://$TARGET_ADDR
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# to avoid cleanup race, stop tunnel before declaring the SST finished.
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# This ensures galera won't start a new SST locally before we exit.
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cleanup_tunnel
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echo "done $STATE"
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elif [ "$WSREP_SST_OPT_ROLE" = "joiner" ]
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then
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wsrep_check_programs lsof socat
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touch $SST_PROGRESS_FILE
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MYSQLD_PID=$WSREP_SST_OPT_PARENT
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RSYNC_PID="$WSREP_SST_OPT_DATA/$MODULE.pid"
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if check_pid $RSYNC_PID
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then
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wsrep_log_error "rsync daemon already running."
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exit 114 # EALREADY
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fi
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rm -rf "$RSYNC_PID"
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ADDR=$WSREP_SST_OPT_ADDR
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RSYNC_PORT=$(echo $ADDR | awk -F ':' '{ print $2 }')
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if [ -z "$RSYNC_PORT" ]
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then
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RSYNC_PORT=4444
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ADDR="$(echo $ADDR | awk -F ':' '{ print $1 }'):$RSYNC_PORT"
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fi
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SOCAT_ADDR=$(echo $ADDR | awk -F ':' '{ print $1 }')
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# map to name in case we received an IP
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SOCAT_HOST=$(getent hosts $SOCAT_ADDR | awk '{ print $2 }')
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if [ -z "$SOCAT_HOST" ]; then
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SOCAT_HOST=$SOCAT_ADDR
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fi
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SOCAT_PORT=$RSYNC_PORT
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trap "exit 32" HUP PIPE
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trap "exit 3" INT TERM ABRT
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trap cleanup_joiner EXIT
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RSYNC_CONF="$WSREP_SST_OPT_DATA/$MODULE.conf"
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if [ -n "${MYSQL_TMP_DIR:-}" ] ; then
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SILENT="log file = $MYSQL_TMP_DIR/rsynd.log"
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else
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SILENT=""
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fi
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cat << EOF > "$RSYNC_CONF"
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pid file = $RSYNC_PID
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use chroot = no
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read only = no
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timeout = 300
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$SILENT
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[$MODULE]
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path = $WSREP_SST_OPT_DATA
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[$MODULE-log_dir]
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path = $WSREP_LOG_DIR
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EOF
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# rm -rf "$DATA"/ib_logfile* # we don't want old logs around
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# Socat receives rsync connections from the donor
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SOCAT_SRC=openssl-listen:$SOCAT_PORT,bind=$SOCAT_HOST,reuseaddr,fork,$SOCAT_OPTS
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SOCAT_DST=tcp:localhost:$RSYNC_PORT
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wsrep_log_info "Setting up tunnel for joiner: socat $SOCAT_SRC $SOCAT_DST"
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socat $SOCAT_SRC $SOCAT_DST &
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SOCAT_REAL_PID=$!
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# This is ok because a local galera node doesn't run SST concurrently
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echo $SOCAT_REAL_PID >"$SOCAT_PID"
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until check_pid_and_port $SOCAT_PID $SOCAT_REAL_PID $SOCAT_PORT $SOCAT_HOST "socat"
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do
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sleep 0.2
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done
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wsrep_log_info "rsync --daemon --no-detach --address localhost --port $RSYNC_PORT --config \"$RSYNC_CONF\""
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rsync --daemon --no-detach --address localhost --port $RSYNC_PORT --config "$RSYNC_CONF" &
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RSYNC_REAL_PID=$!
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until check_pid_and_port $RSYNC_PID $RSYNC_REAL_PID $RSYNC_PORT localhost "rsync"
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do
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sleep 0.2
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done
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echo "ready $ADDR/$MODULE"
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# wait for SST to complete by monitoring magic file
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while [ ! -r "$MAGIC_FILE" ] && check_pid "$RSYNC_PID" && \
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check_pid "$SOCAT_PID" && ps -p $MYSQLD_PID >/dev/null
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do
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sleep 1
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done
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# to avoid cleanup race, we can tear down the socat tunnel now
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# before signaling the end of the SST to galera.
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cleanup_tunnel
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if ! ps -p $MYSQLD_PID >/dev/null
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then
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wsrep_log_error \
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"Parent mysqld process (PID:$MYSQLD_PID) terminated unexpectedly."
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exit 32
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fi
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if ! [ -z $WSREP_SST_OPT_BINLOG ]
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then
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pushd $BINLOG_DIRNAME &> /dev/null
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if [ -f $BINLOG_TAR_FILE ]
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then
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# Clean up old binlog files first
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rm -f ${BINLOG_FILENAME}.*
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wsrep_log_info "Extracting binlog files:"
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tar -xvf $BINLOG_TAR_FILE >&2
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for ii in $(ls -1 ${BINLOG_FILENAME}.*)
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do
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echo ${BINLOG_DIRNAME}/${ii} >> ${BINLOG_FILENAME}.index
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done
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fi
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popd &> /dev/null
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fi
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if [ -r "$MAGIC_FILE" ]
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then
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# UUID:seqno & wsrep_gtid_domain_id is received here.
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|
cat "$MAGIC_FILE" # Output : UUID:seqno wsrep_gtid_domain_id
|
|
else
|
|
# this message should cause joiner to abort
|
|
echo "rsync process ended without creating '$MAGIC_FILE'"
|
|
fi
|
|
wsrep_cleanup_progress_file
|
|
# cleanup_joiner
|
|
else
|
|
wsrep_log_error "Unrecognized role: '$WSREP_SST_OPT_ROLE'"
|
|
exit 22 # EINVAL
|
|
fi
|
|
|
|
rm -f $BINLOG_TAR_FILE || :
|
|
|
|
exit 0
|