backupninja/handlers/mysql.in

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# -*- mode: sh; sh-basic-offset: 3; indent-tabs-mode: nil; -*-
#
# 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 compress yes
getconf vsname
# authentication:
getconf user
getconf dbusername
getconf dbpassword
getconf configfile /etc/mysql/debian.cnf
# Decide if the handler should operate on a vserver or on the host.
# In the former case, check that $vsname exists and is running.
local usevserver=no
local vroot
if [ $vservers_are_available = yes ]; then
if [ -n "$vsname" ]; then
# does it exist ?
if ! vservers_exist "$vsname" ; then
fatal "The vserver given in vsname ($vsname) does not exist."
fi
# is it running ?
vservers_running $vsname || fatal "The vserver $vsname is not running."
# everything ok
info "Using vserver '$vsname'."
usevserver=yes
vroot="$VROOTDIR/$vsname"
else
info "No vserver name specified, actions will be performed on the host."
fi
fi
## 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, $vroot will be empty if no vsname was specified
# and we will instead proceed to operate on the host
[ -d $vroot$backupdir ] || mkdir -p $vroot$backupdir
[ -d $vroot$backupdir ] || fatal "Backup directory '$vroot$backupdir'"
hotdir="$backupdir/hotcopy"
dumpdir="$backupdir/sqldump"
if [ $usevserver = yes ]
then
[ "$sqldump" == "no" -o -d $vroot$dumpdir ] || $VSERVER $vsname exec mkdir -p $dumpdir
[ "$hotcopy" == "no" -o -d $vroot$hotdir ] || $VSERVER $vsname exec mkdir -p $hotdir
else
[ "$sqldump" == "no" -o -d $dumpdir ] || mkdir -p $dumpdir
[ "$hotcopy" == "no" -o -d $hotdir ] || mkdir -p $hotdir
fi
#######################################################################
## AUTHENTICATION
#
# one of three authentication methods:
# 1. setting the user, so that /home/user/.my.cnf is used.
# 2. specifying the user and password in the handler config,
# which generates a temporary .my.cnf in /root/.my.cnf
# 3. specify the config file with --defaults-extra-file
# (this option DOESN'T WORK WITH MYSQLHOTCOPY)
#
# create .my.cnf
# only if dbusername and dbpassword specified.
# we create a tmp file because we don't want to
# specify the password on the command line.
defaultsfile=""
if [ "$dbusername" != "" -a "$dbpassword" != "" ]
then
if [ $usevserver = yes ]
then
vhome=`$VSERVER $vsname exec getent passwd "root" | @AWK@ -F: '{print $6}'`
home="$vroot$vhome"
else
home=`getent passwd "root" | @AWK@ -F: '{print $6}'`
fi
[ -d $home ] || fatal "Can't find root's home directory ($home)."
mycnf="$home/.my.cnf"
if [ -f $mycnf ]
then
# rename temporarily
tmpcnf="$home/my.cnf.disable"
debug "mv $mycnf $tmpcnf"
mv $mycnf $tmpcnf
fi
oldmask=`umask`
umask 077
cat > $mycnf <<EOF
# auto generated backupninja mysql conf
[mysql]
host=$dbhost
user=$dbusername
password="$dbpassword"
[mysqldump]
host=$dbhost
user=$dbusername
password="$dbpassword"
[mysqlhotcopy]
host=$dbhost
user=$dbusername
password="$dbpassword"
EOF
umask $oldmask
if [ $usevserver = yes ]
then
defaultsfile="--defaults-extra-file=$vhome/.my.cnf"
else
defaultsfile="--defaults-extra-file=$mycnf"
fi
fi
# if a user is not set, use $configfile, otherwise use $mycnf
if [ "$user" == "" ]; then
user=root;
defaultsfile="--defaults-extra-file=$configfile"
else
userset=true;
if [ $usevserver = yes ]
then
vuserhome=`$VSERVER $vsname exec getent passwd "$user" | @AWK@ -F: '{print $6}'`
if [ $? -eq 2 ]
then
fatal "User $user not found in /etc/passwd"
fi
userhome="$vroot$vuserhome"
else
userhome=`getent passwd "$user" | @AWK@ -F: '{print $6}'`
if [ $? -eq 2 ]
then
fatal "User $user not found in /etc/passwd"
fi
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 $defaultsfile"
fi
#######################################################################
## HOT COPY
if [ "$hotcopy" == "yes" ]
then
info "Initializing hotcopy method"
if [ "$databases" == "all" ]
then
if [ $usevserver = yes ]
then
info "dbhost: $dbhost"
execstr="$VSERVER $vsname exec $MYSQLHOTCOPY -h $dbhost --quiet --allowold --regexp /.\*/./.\*/ $hotdir"
else
execstr="$MYSQLHOTCOPY --quiet --allowold --regexp /.\*/./.\*/ $hotdir"
fi
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
if [ $usevserver = yes ]
then
execstr="$VSERVER $vsname exec $MYSQLHOTCOPY --allowold $db $hotdir"
else
execstr="$MYSQLHOTCOPY --allowold $db $hotdir"
fi
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
if [ $usevserver = yes ]
then
debug 'echo show databases | $VSERVER $vsname exec su $user -c \"$MYSQL $defaultsfile\" | grep -v Database'
databases=`echo 'show databases' | $VSERVER $vsname exec su $user -c "$MYSQL $defaultsfile" | grep -v Database`
if [ $? -ne 0 ]
then
fatal "Authentication problem, maybe user/password is wrong or mysqld is not running?"
fi
else
databases=$(su $user -c "$MYSQL $defaultsfile -N -B -e 'show databases'" | sed 's/|//g;/\+----/d')
if [ $? -ne 0 ]
then
fatal "Authentication problem, maybe user/password is wrong or mysqld is not running?"
fi
fi
fi
for db in $databases
do
DUMP_BASE="$MYSQLDUMP $defaultsfile --lock-tables --complete-insert --add-drop-table --quick --quote-names"
# Dumping structure and data
DUMP="$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\.\([^\w]*\)" )
DUMP_STRUCT="$DUMP_STRUCT $table"
done
DUMP="( $DUMP; $DUMP_STRUCT )"
fi
if [ $usevserver = yes ]
then
# Test to make sure mysqld is running, if it is not sqldump will not work
$VSERVER $vsname exec su $user -c "$MYSQLADMIN $defaultsfile ping"
if [ $? -ne 0 ]; then
fatal "Either you have an authentication problem, or mysqld doesn't appear to be running!"
fi
if [ "$compress" == "yes" ]; then
execstr="$VSERVER $vsname exec $DUMP | $GZIP > $vroot$dumpdir/${db}.sql.gz"
else
execstr="$VSERVER $vsname exec $DUMP -r $vroot$dumpdir/${db}.sql"
fi
else
# Test to make sure mysqld is running, if it is not sqldump will not work
su $user -c "$MYSQLADMIN $defaultsfile ping"
if [ $? -ne 0 ]; then
fatal "Either you have an authentication problem, or mysqld doesn't appear to be running!"
fi
if [ "$compress" == "yes" ]; then
execstr="$DUMP | $GZIP > $dumpdir/${db}.sql.gz"
else
execstr="$DUMP -r $dumpdir/${db}.sql"
fi
fi
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 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 $mycnf"
rm $mycnf
if [ -f "$tmpcnf" ]
then
debug "mv $tmpcnf $mycnf"
mv $tmpcnf $mycnf
fi
fi
return 0