handlers/mysql

   1 #
   2 # mysql handler script for backupninja
   3 #
   4
   5 getconf backupdir /var/backups/mysql
   6 getconf databases all
   7 getconf ignores
   8 getconf dbhost localhost
   9 getconf hotcopy no
  10 getconf sqldump no
  11 getconf compress yes
  12 getconf vsname
  13
  14 # authentication:
  15 getconf user
  16 getconf dbusername
  17 getconf dbpassword
  18 getconf configfile /etc/mysql/debian.cnf
  19
  20
  21 # If vservers are configured, decide if the handler should
  22 # use them or if it should just operate on the host
  23
  24 if [ "$vservers" = "yes" ]
  25 then
  26         if [ ! -z $vsname ]
  27         then
  28                 info "Using vserver '$vsname'"
  29                 usevserver=1
  30         else
  31                 info "No vserver name specified, actions will be performed on the host"
  32         fi
  33 fi
  34
  35 # If needed, make sure that the specified vserver exists and is running.
  36 if [ $usevserver ]
  37 then
  38         info "Examining vserver '$vsname'"
  39         # does it exist ?
  40         vroot="$VROOTDIR/$vsname"
  41         [ -d $vroot ] || fatal "vserver '$vsname' does not exist at '$vroot'"
  42         # is it running ?
  43         $VSERVERINFO -q $vsname RUNNING
  44         if [ $? -ne 0 ]
  45         then
  46                 fatal "vserver $vsname is not running."
  47         fi
  48 fi
  49
  50 if [ "$user" == "" ]; then
  51         userset=false;
  52         user=root;
  53 else
  54         userset=true;
  55         if [ $usevserver ]
  56         then
  57             userhome=`$VSERVER $vsname exec getent passwd "$user" | awk -F: '{print $6}'`
  58             if [ $? -eq 2 ]
  59             then
  60                 fatal "User $user not found in /etc/passwd"
  61             fi
  62             userhome="$vroot$userhome"
  63             info "User home set to: $userhome"
  64             [ -f $userhome/.my.cnf ] || fatal "Can't find config file in $userhome/.my.cnf"
  65         else
  66             userhome=`getent passwd "$user" | awk -F: '{print $6}'`
  67             if [ $? -eq 2 ]
  68             then
  69                 fatal "User $user not found in /etc/passwd"
  70             fi
  71             info "User home set to: $userhome"
  72             [ -f $userhome/.my.cnf ] || fatal "Can't find config file in $userhome/.my.cnf"
  73         fi
  74 fi
  75
  76 ## Prepare ignore part of the command
  77 ## This only works for mysqldump at the moment
  78
  79 ignore=''
  80 for i in $ignores; do
  81        ignore="$ignore --ignore-table=$i"
  82 done
  83
  84 # create backup dirs, $vroot will be empty if no vsname was specified
  85 # and we will instead proceed to operate on the host
  86 [ -d $vroot$backupdir ] || mkdir -p $vroot$backupdir
  87 [ -d $vroot$backupdir ] || fatal "Backup directory '$vroot$backupdir'"
  88 hotdir="$backupdir/hotcopy"
  89 dumpdir="$backupdir/sqldump"
  90
  91 if [ $usevserver ]
  92 then
  93         [ "$sqldump" == "no" -o -d $vroot$dumpdir ] || $VSERVER $vsname exec mkdir -p $dumpdir
  94         [ "$hotcopy" == "no" -o -d $vroot$hotdir ] || $VSERVER $vsname exec mkdir -p $hotdir
  95 else
  96         [ "$sqldump" == "no" -o -d $dumpdir ] || mkdir -p $dumpdir
  97         [ "$hotcopy" == "no" -o -d $hotdir ] || mkdir -p $hotdir
  98 fi
  99
 100 #######################################################################
 101 ## AUTHENTICATION
 102
 103 #
 104 # one of three authentication methods:
 105 # 1. setting the user, so that /home/user/.my.cnf is used.
 106 # 2. specifying the user and password in the handler config,
 107 #    which generates a temporary .my.cnf in /root/.my.cnf
 108 # 3. specify the config file with --defaults-file
 109 #    (this option DOESN'T WORK WITH MYSQLHOTCOPY)
 110 #
 111
 112 # create .my.cnf
 113 # only if dbusername and dbpassword specified.
 114 # we create a tmp file because we don't want to
 115 # specify the password on the command line.
 116
 117 defaultsfile=""
 118 if [ "$dbusername" != "" -a "$dbpassword" != "" ]
 119 then
 120     if [ $usevserver ]
 121     then
 122         home=`$VSERVER $vsname exec getent passwd "root" | awk -F: '{print $6}'`
 123     else
 124         home=`getent passwd "root" | awk -F: '{print $6}'`
 125     fi
 126     [ -d $home ] || fatal "Can't find root's home directory ($home)."
 127     mycnf="$home/.my.cnf"
 128     if [ -f $mycnf ]
 129     then
 130         # rename temporarily
 131         tmpcnf="$home/my.cnf.disable"
 132         debug "mv $mycnf $tmpcnf"
 133         mv $mycnf $tmpcnf
 134     fi
 135     oldmask=`umask`
 136     umask 077
 137     cat > $mycnf <<EOF
 138 # auto generated backupninja mysql conf
 139 [mysql]
 140 user=$dbusername
 141 password="$dbpassword"
 142
 143 [mysqldump]
 144 user=$dbusername
 145 password="$dbpassword"
 146
 147 [mysqlhotcopy]
 148 user=$dbusername
 149 password="$dbpassword"
 150 EOF
 151         umask $oldmask
 152         defaultsfile="--defaults-file=$mycnf"
 153 elif [ "$userset" == "false" ]; then
 154         # if user is set, don't use $configfile
 155         defaultsfile="--defaults-file=$configfile"
 156 fi
 157
 158 #######################################################################
 159 ## HOT COPY
 160
 161 if [ "$hotcopy" == "yes" ]; then
 162         if [ "$databases" == "all" ]; then
 163                 if [ $usevserver ]
 164                 then
 165                         execstr="$VSERVER $vsname exec $MYSQLHOTCOPY --quiet --allowold --regexp /.\*/./.\*/ $hotdir"
 166                 else
 167                         execstr="$MYSQLHOTCOPY --quiet --allowold --regexp /.\*/./.\*/ $hotdir"
 168                 fi
 169                 debug "su $user -c '$execstr'"
 170                 if [ ! $test ]; then
 171                         output=`su $user -c "$execstr" 2>&1`
 172                         code=$?
 173                         if [ "$code" == "0" ]; then
 174                                 debug $output
 175                                 info "Successfully finished hotcopy of all mysql databases"
 176                         else
 177                                 warning $output
 178                                 warning "Failed to hotcopy all mysql databases"
 179                         fi
 180                 fi
 181         else
 182                 for db in $databases; do
 183                         if [ $usevserver ]
 184                         then
 185                                 execstr="$VSERVER $vsname exec $MYSQLHOTCOPY --allowold $db $hotdir"
 186                         else
 187                                 execstr="$MYSQLHOTCOPY --allowold $db $hotdir"
 188                         fi
 189                         debug "su $user -c '$execstr'"
 190                         if [ ! $test ]; then
 191                                 output=`su $user -c "$execstr" 2>&1`
 192                                 code=$?
 193                                 if [ "$code" == "0" ]; then
 194                                         debug $output
 195                                         info "Successfully finished hotcopy of mysql database $db"
 196                                 else
 197                                         warning $output
 198                                         warning "Failed to hotcopy mysql database $db"
 199                                 fi
 200                         fi
 201                 done
 202         fi
 203 fi
 204
 205 ##########################################################################
 206 ## SQL DUMP
 207
 208 if [ "$sqldump" == "yes" ]; then
 209         if [ "$databases" == "all" ]; then
 210                 if [ $usevserver ]
 211                 then
 212                         databases=`echo 'show databases' | $VSERVER $vsname exec su $user -c "$MYSQL $defaultsfile" | grep -v Database`
 213                         if [ $? -ne 0 ]
 214                         then
 215                             fatal "Something unexpected happened, the defaults file may have gone missing or is corrupt"
 216                         fi
 217                 else
 218                         databases=`echo 'show databases' | su $user -c "$MYSQL $defaultsfile" | grep -v Database`
 219                         if [ $? -ne 0 ]
 220                         then
 221                             fatal "Something unexpected happened, the defaults file may have gone missing or is corrupt"
 222                         fi
 223                 fi
 224         fi
 225
 226         for db in $databases; do
 227                 if [ $usevserver ]
 228                 then
 229                         execstr="$VSERVER $vsname exec $MYSQLDUMP $defaultsfile --lock-tables --complete-insert --add-drop-table --quick --quote-names $ignore $db > $vroot$dumpdir/${db}.sql"
 230                 else
 231                         execstr="$MYSQLDUMP $defaultsfile --lock-tables --complete-insert --add-drop-table --quick --quote-names $ignore $db > $dumpdir/${db}.sql"
 232                 fi
 233                 debug "su $user -c '$execstr'"
 234                 if [ ! $test ]; then
 235                         output=`su $user -c "$execstr" 2>&1`
 236                         code=$?
 237                         if [ "$code" == "0" ]; then
 238                                 debug $output
 239                                 info "Successfully finished dump of mysql database $db"
 240                         else
 241                                 warning $output
 242                                 warning "Failed to dump mysql databases $db"
 243                         fi
 244                 fi
 245         done
 246
 247         if [ "$compress" == "yes" ]; then
 248                 output=`$GZIP -f $vroot$dumpdir/*.sql 2>&1`
 249                 debug $output
 250         fi
 251 fi
 252
 253 # clean up tmp config file
 254 if [ "$dbusername" != "" ]; then
 255         ## clean up tmp config file
 256         debug "rm $mycnf"
 257         rm $mycnf
 258         if [ -f "$tmpcnf" ]; then
 259                 debug "mv $tmpcnf $mycnf"
 260                 mv $tmpcnf $mycnf
 261         fi
 262 fi
 263
 264 return 0