/usr/bin/wsrep_sst_rsync is in percona-xtradb-cluster-server-5.7 5.7.20-29.24-0ubuntu2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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# Copyright (C) 2010-2014 Codership Oy
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING. If not, write to the
# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston
# MA 02110-1301 USA.
# This is a reference script for rsync-based state snapshot tansfer
RSYNC_PID=
RSYNC_CONF=
keyring=""
KEYRING_FILE=
OS=$(uname)
[ "$OS" == "Darwin" ] && export -n LD_LIBRARY_PATH
# Setting the path for lsof on CentOS
export PATH="/usr/sbin:/sbin:$PATH"
. $(dirname $0)/wsrep_sst_common
wsrep_check_programs rsync
keyring=$(parse_cnf mysqld keyring-file-data "")
if [[ -z $keyring ]]; then
keyring=$(parse_cnf sst keyring-file-data "")
fi
cleanup_joiner()
{
local PID=$(cat "$RSYNC_PID" 2>/dev/null || echo 0)
wsrep_log_debug "Joiner cleanup. rsync PID: $PID"
[ "0" != "$PID" ] && kill $PID && sleep 0.5 && kill -9 $PID >/dev/null 2>&1 \
|| :
rm -rf "$RSYNC_CONF"
rm -rf "$MAGIC_FILE"
rm -rf "$RSYNC_PID"
rm -rf "$KEYRING_FILE"
wsrep_log_debug "Joiner cleanup done."
if [ "${WSREP_SST_OPT_ROLE}" = "joiner" ];then
wsrep_cleanup_progress_file
fi
}
check_pid()
{
local pid_file=$1
[ -r "$pid_file" ] && ps -p $(cat $pid_file) >/dev/null 2>&1
}
check_pid_and_port()
{
local pid_file=$1
local rsync_pid=$2
local rsync_port=$3
if ! which lsof > /dev/null; then
wsrep_log_error "lsof tool not found in PATH! Make sure you have it installed."
exit 2 # ENOENT
fi
local port_info=$(lsof -i :$rsync_port -Pn 2>/dev/null | \
grep "(LISTEN)")
local is_rsync=$(echo $port_info | \
grep -w '^rsync[[:space:]]\+'"$rsync_pid" 2>/dev/null)
if [ -n "$port_info" -a -z "$is_rsync" ]; then
wsrep_log_error "******************* FATAL ERROR ********************** "
wsrep_log_error "rsync daemon port '$rsync_port' has been taken"
wsrep_log_error "****************************************************** "
exit 16 # EBUSY
fi
check_pid $pid_file && \
[ -n "$port_info" ] && [ -n "$is_rsync" ] && \
[ $(cat $pid_file) -eq $rsync_pid ]
}
MAGIC_FILE="$WSREP_SST_OPT_DATA/rsync_sst_complete"
rm -rf "$MAGIC_FILE"
BINLOG_TAR_FILE="$WSREP_SST_OPT_DATA/wsrep_sst_binlog.tar"
BINLOG_N_FILES=1
rm -f "$BINLOG_TAR_FILE" || :
if ! [ -z $WSREP_SST_OPT_BINLOG ]
then
BINLOG_DIRNAME=$(dirname $WSREP_SST_OPT_BINLOG)
BINLOG_FILENAME=$(basename $WSREP_SST_OPT_BINLOG)
fi
KEYRING_FILE="$WSREP_SST_OPT_DATA/keyring-sst"
rm -rf "$KEYRING_FILE"
WSREP_LOG_DIR=${WSREP_LOG_DIR:-""}
# if WSREP_LOG_DIR env. variable is not set, try to get it from my.cnf
if [ -z "$WSREP_LOG_DIR" ]; then
WSREP_LOG_DIR=$(parse_cnf mysqld-5.6 innodb_log_group_home_dir "")
fi
if [ -z "$WSREP_LOG_DIR" ]; then
WSREP_LOG_DIR=$(parse_cnf mysqld innodb_log_group_home_dir "")
fi
if [ -z "$WSREP_LOG_DIR" ]; then
WSREP_LOG_DIR=$(parse_cnf server innodb_log_group_home_dir "")
fi
if [ -n "$WSREP_LOG_DIR" ]; then
# handle both relative and absolute paths
WSREP_LOG_DIR=$(cd $WSREP_SST_OPT_DATA; mkdir -p "$WSREP_LOG_DIR"; cd $WSREP_LOG_DIR; pwd -P)
else
# default to datadir
WSREP_LOG_DIR=$(cd $WSREP_SST_OPT_DATA; pwd -P)
fi
# Old filter - include everything except selected
# FILTER=(--exclude '*.err' --exclude '*.pid' --exclude '*.sock' \
# --exclude '*.conf' --exclude core --exclude 'galera.*' \
# --exclude grastate.txt --exclude '*.pem' \
# --exclude '*.[0-9][0-9][0-9][0-9][0-9][0-9]' --exclude '*.index')
# New filter - exclude everything except dirs (schemas) and innodb files
FILTER=(-f '- /lost+found' -f '- /.fseventsd' -f '- /.Trashes'
-f '+ /wsrep_sst_binlog.tar' -f '+ /ib_lru_dump' -f '+ /ibdata*' -f '+ /*/' -f '- /*')
if [ "$WSREP_SST_OPT_ROLE" = "donor" ]
then
if [ $WSREP_SST_OPT_BYPASS -eq 0 ]
then
FLUSHED="$WSREP_SST_OPT_DATA/tables_flushed"
rm -rf "$FLUSHED"
# Use deltaxfer only for WAN
inv=$(basename $0)
[ "$inv" = "wsrep_sst_rsync_wan" ] && WHOLE_FILE_OPT="" \
|| WHOLE_FILE_OPT="--whole-file"
echo "flush tables"
# wait for tables flushed and state ID written to the file
while [ ! -r "$FLUSHED" ] && ! grep -q ':' "$FLUSHED" >/dev/null 2>&1
do
sleep 0.2
done
STATE="$(cat $FLUSHED)"
rm -rf "$FLUSHED"
sync
if ! [ -z $WSREP_SST_OPT_BINLOG ]
then
# Prepare binlog files
pushd $BINLOG_DIRNAME &> /dev/null
binlog_files_full=$(tail -n $BINLOG_N_FILES ${BINLOG_FILENAME}.index)
binlog_files=""
for ii in $binlog_files_full
do
binlog_files="$binlog_files $(basename $ii)"
done
if ! [ -z "$binlog_files" ]
then
wsrep_log_debug "Preparing binlog files for transfer:"
tar -cf $BINLOG_TAR_FILE $binlog_files >&2
fi
popd &> /dev/null
fi
wsrep_log_info "Starting rsync of data-dir............"
# first, the normal directories, so that we can detect incompatible protocol
RC=0
rsync --owner --group --perms --links --specials \
--ignore-times --inplace --dirs --delete --quiet \
$WHOLE_FILE_OPT "${FILTER[@]}" "$WSREP_SST_OPT_DATA/" \
rsync://$WSREP_SST_OPT_ADDR >&2 || RC=$?
if [ "$RC" -ne 0 ]; then
wsrep_log_error "******************* FATAL ERROR ********************** "
wsrep_log_error "rsync returned code $RC:"
wsrep_log_error "****************************************************** "
case $RC in
12) RC=71 # EPROTO
wsrep_log_error \
"rsync server on the other end has incompatible protocol. " \
"Make sure you have the same version of rsync on all nodes."
;;
22) RC=12 # ENOMEM
;;
*) RC=255 # unknown error
;;
esac
exit $RC
fi
# second, we transfer InnoDB log files
rsync --owner --group --perms --links --specials \
--ignore-times --inplace --dirs --delete --quiet \
$WHOLE_FILE_OPT -f '+ /ib_logfile[0-9]*' -f '- **' "$WSREP_LOG_DIR/" \
rsync://$WSREP_SST_OPT_ADDR-log_dir >&2 || RC=$?
if [ $RC -ne 0 ]; then
wsrep_log_error "******************* FATAL ERROR ********************** "
wsrep_log_error "rsync innodb_log_group_home_dir returned code $RC:"
wsrep_log_error "****************************************************** "
exit 255 # unknown error
fi
# third, transfer the keyring file (this requires SSL, check for encryption)
if [[ -r $keyring ]]; then
rsync --owner --group --perms --links --specials \
--ignore-times --inplace --quiet \
$WHOLE_FILE_OPT "$keyring" \
rsync://$WSREP_SST_OPT_ADDR/keyring-sst >&2 || RC=$?
if [ $RC -ne 0 ]; then
wsrep_log_error "******************* FATAL ERROR ********************** "
wsrep_log_error "rsync keyring returned code $RC:"
wsrep_log_error "****************************************************** "
exit 255 # unknown error
fi
fi
# then, we parallelize the transfer of database directories, use . so that pathconcatenation works
pushd "$WSREP_SST_OPT_DATA" >/dev/null
count=1
[ "$OS" == "Linux" ] && count=$(grep -c processor /proc/cpuinfo)
[ "$OS" == "Darwin" -o "$OS" == "FreeBSD" ] && count=$(sysctl -n hw.ncpu)
find . -maxdepth 1 -mindepth 1 -type d -not -name "lost+found" \
-print0 | xargs -I{} -0 -P $count \
rsync --owner --group --perms --links --specials \
--ignore-times --inplace --recursive --delete --quiet \
$WHOLE_FILE_OPT --exclude '*/ib_logfile*' "$WSREP_SST_OPT_DATA"/{}/ \
rsync://$WSREP_SST_OPT_ADDR/{} >&2 || RC=$?
popd >/dev/null
if [ $RC -ne 0 ]; then
wsrep_log_error "******************* FATAL ERROR ********************** "
wsrep_log_error "find/rsync returned code $RC:"
wsrep_log_error "****************************************************** "
exit 255 # unknown error
fi
wsrep_log_info "...............rsync completed"
else # BYPASS
wsrep_log_info "Bypassing state dump (SST)."
STATE="$WSREP_SST_OPT_GTID"
fi
echo "continue" # now server can resume updating data
echo "$STATE" > "$MAGIC_FILE"
rsync --archive --quiet --checksum "$MAGIC_FILE" rsync://$WSREP_SST_OPT_ADDR
echo "done $STATE"
elif [ "$WSREP_SST_OPT_ROLE" = "joiner" ]
then
wsrep_check_programs lsof
touch $SST_PROGRESS_FILE
MYSQLD_PID=$WSREP_SST_OPT_PARENT
MODULE="rsync_sst"
RSYNC_PID="$WSREP_SST_OPT_DATA/$MODULE.pid"
if check_pid $RSYNC_PID
then
wsrep_log_error "******************* FATAL ERROR ********************** "
wsrep_log_error "rsync daemon already running."
wsrep_log_error "****************************************************** "
exit 114 # EALREADY
fi
rm -rf "$RSYNC_PID"
trap "exit 32" HUP PIPE
trap "exit 3" INT TERM ABRT
trap cleanup_joiner EXIT
RSYNC_CONF="$WSREP_SST_OPT_DATA/$MODULE.conf"
if [ -n "${MYSQL_TMP_DIR:-}" ] ; then
SILENT="log file = $MYSQL_TMP_DIR/rsyncd.log"
else
SILENT=""
fi
cat << EOF > "$RSYNC_CONF"
pid file = $RSYNC_PID
use chroot = no
read only = no
timeout = 300
$SILENT
[$MODULE]
path = $WSREP_SST_OPT_DATA
[$MODULE-log_dir]
path = $WSREP_LOG_DIR
EOF
# rm -rf "$DATA"/ib_logfile* # we don't want old logs around
# listen at all interfaces (for firewalled setups)
wsrep_log_info "Waiting for data-dir through rsync................"
readonly RSYNC_PORT=${WSREP_SST_OPT_PORT:-4444}
rsync --daemon --no-detach --port $RSYNC_PORT --config "$RSYNC_CONF" &
RSYNC_REAL_PID=$!
until check_pid_and_port $RSYNC_PID $RSYNC_REAL_PID $RSYNC_PORT
do
sleep 0.2
done
echo "ready $WSREP_SST_OPT_HOST:$RSYNC_PORT/$MODULE"
# wait for SST to complete by monitoring magic file
while [ ! -r "$MAGIC_FILE" ] && check_pid "$RSYNC_PID" && \
ps -p $MYSQLD_PID >/dev/null
do
sleep 1
done
if ! ps -p $MYSQLD_PID >/dev/null
then
wsrep_log_error "******************* FATAL ERROR ********************** "
wsrep_log_error "Parent mysqld process (PID:$MYSQLD_PID) terminated unexpectedly."
wsrep_log_error "****************************************************** "
exit 32
fi
if ! [ -z $WSREP_SST_OPT_BINLOG ]
then
pushd $BINLOG_DIRNAME &> /dev/null
if [ -f $BINLOG_TAR_FILE ]
then
# Clean up old binlog files first
rm -f ${BINLOG_FILENAME}.* 2> /dev/null
wsrep_log_debug "Extracting binlog files:"
tar -xf $BINLOG_TAR_FILE >&2
for ii in $(ls -1 ${BINLOG_FILENAME}.*)
do
echo ${BINLOG_DIRNAME}/${ii} >> ${BINLOG_FILENAME}.index
done
fi
popd &> /dev/null
fi
if [[ -n $keyring ]]; then
if [[ -r $KEYRING_FILE ]]; then
wsrep_log_info "Moving sst keyring into place: moving $KEYRING_FILE to $keyring"
mv $KEYRING_FILE $keyring
else
# error, missing file
wsrep_log_error "******************* FATAL ERROR ********************** "
wsrep_log_error "FATAL: rsync could not find '${KEYRING_FILE}'"
wsrep_log_error "The joiner is using a keyring file but the donor has not sent"
wsrep_log_error "a keyring file. Please check your configuration to ensure that"
wsrep_log_error "both sides are using a keyring file"
wsrep_log_error "****************************************************** "
exit 32
fi
else
if [[ -r $KEYRING_FILE ]]; then
# error, file should not be here
wsrep_log_error "******************* FATAL ERROR ********************** "
wsrep_log_error "FATAL: rsync found '${KEYRING_FILE}'"
wsrep_log_error "The joiner is not using a keyring file but the donor has sent"
wsrep_log_error "a keyring file. Please check your configuration to ensure that"
wsrep_log_error "both sides are using a keyring file"
wsrep_log_error "****************************************************** "
rm -rf $KEYRING_FILE
exit 32
fi
fi
if [ -r "$MAGIC_FILE" ]
then
cat "$MAGIC_FILE" # output UUID:seqno
else
# this message should cause joiner to abort
echo "rsync process ended without creating '$MAGIC_FILE'"
fi
wsrep_cleanup_progress_file
wsrep_log_info "..............rsync completed"
# cleanup_joiner
else
wsrep_log_error "******************* FATAL ERROR ********************** "
wsrep_log_error "Unrecognized role: '$WSREP_SST_OPT_ROLE'"
wsrep_log_error "****************************************************** "
exit 22 # EINVAL
fi
rm -f $BINLOG_TAR_FILE || :
exit 0
|