backupninja/handlers/mysql.in
Jerome Charaoui eabda5615c Remove vserver support (fixes #11289)
This is probably completely unused by now, as vservers have been
superseeded by alternative technology for many years already.
2021-01-02 15:27:32 -05:00

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# -*- mode: sh; sh-basic-offset: 3; indent-tabs-mode: nil; -*-
# vim: set filetype=sh sw=3 sts=3 expandtab autoindent:
#
# mysql handler script for backupninja
#
getconf backupdir /var/backups/mysql
getconf databases all
getconf ignores
getconf nodata
getconf dbhost localhost
getconf hotcopy no
getconf sqldump no
getconf sqldumpoptions "--lock-tables --complete-insert --add-drop-table --quick --quote-names"
getconf compress yes
# authentication:
getconf user
getconf dbusername
getconf dbpassword
getconf configfile /etc/mysql/debian.cnf
## Prepare ignore part of the command
## This only works for mysqldump at the moment
ignore=''
for i in $ignores $nodata; do
ignore="$ignore --ignore-table=$i"
done
# create backup dirs
# and we will instead proceed to operate on the host
[ -d $backupdir ] || mkdir -p $backupdir
[ -d $backupdir ] || fatal "Backup directory '$backupdir'"
hotdir="$backupdir/hotcopy"
dumpdir="$backupdir/sqldump"
[ "$sqldump" == "no" -o -d $dumpdir ] || mkdir -p $dumpdir
[ "$hotcopy" == "no" -o -d $hotdir ] || mkdir -p $hotdir
#######################################################################
## AUTHENTICATION
#
# one of three authentication methods:
# 1. setting the user, so that /home/user/.my.cnf is used.
# 2. specifying the user and password in the handler config,
# which generates a temporary .my.cnf in /root/.my.cnf
# 3. specify the config file with --defaults-extra-file
# (this option DOESN'T WORK WITH MYSQLHOTCOPY)
#
# create .my.cnf
# only if dbusername and dbpassword specified.
# we create a tmp file because we don't want to
# specify the password on the command line.
defaultsfile=""
if [ -n "$dbusername" -a -n "$dbpassword" ]
then
home=`getent passwd "root" | @AWK@ -F: '{print $6}'`
[ -d $home ] || fatal "Can't find root's home directory ($home)."
mycnf="$home/.my.cnf"
workcnf="$mycnf"
if [ -f $workcnf ]
then
# rename temporarily
tmpcnf="$workcnf.disable"
debug "mv $workcnf $tmpcnf"
mv $workcnf $tmpcnf
fi
oldmask=`umask`
umask 077
cat > $workcnf <<EOF
# auto generated backupninja mysql conf
[mysql]
host=$dbhost
user=$dbusername
password="$dbpassword"
[mysqldump]
host=$dbhost
user=$dbusername
password="$dbpassword"
[mysqlhotcopy]
host=$dbhost
user=$dbusername
password="$dbpassword"
[mysqladmin]
host=$dbhost
user=$dbusername
password="$dbpassword"
EOF
umask $oldmask
defaultsfile="--defaults-extra-file=$mycnf"
# else, if a user is set use her .my.cnf
elif [ -n "$user" ]
then
userset=true;
userhome=`getent passwd "$user" | @AWK@ -F: '{print $6}'`
if [ $? -eq 2 ]
then
fatal "User $user not found in /etc/passwd"
fi
debug "User home set to: $userhome"
[ -f $userhome/.my.cnf ] || fatal "Can't find config file in $userhome/.my.cnf"
defaultsfile="--defaults-extra-file=$userhome/.my.cnf"
debug "using $defaultsfile"
# otherwise use $configfile
else
user=root
defaultsfile="--defaults-extra-file=$configfile"
fi
#######################################################################
## HOT COPY
if [ "$hotcopy" == "yes" ]
then
info "Initializing hotcopy method"
if [ "$databases" == "all" ]
then
execstr="$MYSQLHOTCOPY --quiet --allowold --regexp /.\*/./.\*/ $hotdir"
debug "su $user -c \"$execstr\""
if [ ! $test ]
then
output=`su $user -c "$execstr" 2>&1`
code=$?
if [ "$code" == "0" ]
then
debug "$output"
info "Successfully finished hotcopy of all mysql databases"
else
warning "$output"
warning "Failed to hotcopy all mysql databases"
fi
fi
else
for db in $databases
do
execstr="$MYSQLHOTCOPY --allowold $db $hotdir"
debug 'su $user -c \"$execstr\"'
if [ ! $test ]
then
output=`su $user -c "$execstr" 2>&1`
code=$?
if [ "$code" == "0" ]
then
debug "$output"
info "Successfully finished hotcopy of mysql database $db"
else
warning "$output"
warning "Failed to hotcopy mysql database $db"
fi
fi
done
fi
fi
##########################################################################
## SQL DUMP
if [ "$sqldump" == "yes" ]
then
info "Initializing SQL dump method"
if [ "$databases" == "all" ]
then
databases=$(set -o pipefail ; su $user -c "$MYSQL $defaultsfile -N -B -e 'show databases'" | sed 's/|//g;/\+----/d;/^\(information\|performance\)_schema$/d')
if [ $? -ne 0 ]
then
fatal "Authentication problem, maybe user/password is wrong or mysqld is not running?"
fi
fi
for db in $databases
do
# Sanitize database name
db=$(echo $db | tr -d \'\;)
DUMP_BASE="$MYSQLDUMP $defaultsfile $sqldumpoptions"
# Dumping structure and data
DUMP="$DUMP_BASE $ignore $db"
# If requested, dump only the table structure for this database
if echo "$nodata" | grep -E '(^|[[:space:]])'"$db\." >/dev/null
then
# Get the structure of the tables, without data
DUMP_STRUCT="$DUMP_BASE --no-data $db"
for qualified_table in $nodata
do
table=$( expr match "$qualified_table" "$db\.\(.\+\)" )
DUMP_STRUCT="$DUMP_STRUCT $table"
done
DUMP="( $DUMP; $DUMP_STRUCT )"
fi
# Test to make sure mysqld is running, if it is not sqldump will not work
su $user -c "$MYSQLADMIN $defaultsfile ping 2>&1 >/dev/null"
if [ $? -ne 0 ]; then
fatal "mysqld doesn't appear to be running!"
fi
if [ "$compress" == "yes" ]; then
execstr="$DUMP | $GZIP $GZIP_OPTS > '$dumpdir/${db}.sql.gz'"
else
execstr="$DUMP > '$dumpdir/${db}.sql'"
fi
debug "su $user -c \"$execstr\""
if [ ! $test ]
then
output=`su $user -s /bin/bash -c "set -o pipefail ; $execstr" 2>&1`
code=$?
if [ "$code" == "0" ]
then
debug "$output"
info "Successfully finished dump of mysql database $db"
else
warning "$output"
warning "Failed to dump mysql databases $db"
fi
fi
done
fi
# clean up tmp config file
if [ "$dbusername" != "" -a "$dbpassword" != "" ]
then
## clean up tmp config file
debug "rm $workcnf"
rm $workcnf
if [ -f "$tmpcnf" ]
then
debug "mv $tmpcnf $workcnf"
mv $tmpcnf $workcnf
fi
fi
return 0