ctdb/config/events.d/00.ctdb

   1 #!/bin/sh
   2
   3 # Event script for ctdb-specific setup and other things that don't fit
   4 # elsewhere.
   5
   6 [ -n "$CTDB_BASE" ] || \
   7     export CTDB_BASE=$(cd -P $(dirname "$0") ; dirname "$PWD")
   8
   9 . $CTDB_BASE/functions
  10 loadconfig
  11
  12 ctdb_setup_service_state_dir "ctdb"
  13
  14 ############################################################
  15
  16 select_tdb_checker ()
  17 {
  18     # Find the best TDB consistency check available.
  19     use_tdb_tool_check=false
  20     type tdbtool >/dev/null 2>&1 && found_tdbtool=true
  21     type tdbdump >/dev/null 2>&1 && found_tdbdump=true
  22
  23     if $found_tdbtool && echo "help" | tdbtool | grep -q check ; then
  24             use_tdb_tool_check=true
  25     elif $found_tdbtool && $found_tdbdump ; then
  26             cat <<EOF
  27 WARNING: The installed 'tdbtool' does not offer the 'check' subcommand.
  28  Using 'tdbdump' for database checks.
  29  Consider updating 'tdbtool' for better checks!
  30 EOF
  31     elif $found_tdbdump ; then
  32         cat <<EOF
  33 WARNING: 'tdbtool' is not available.
  34  Using 'tdbdump' to check the databases.
  35  Consider installing a recent 'tdbtool' for better checks!
  36 EOF
  37     else
  38         cat <<EOF
  39 WARNING: Cannot check databases since neither
  40  'tdbdump' nor 'tdbtool check' is available.
  41  Consider installing tdbtool or at least tdbdump!
  42 EOF
  43         return 1
  44     fi
  45 }
  46
  47 check_tdb ()
  48 {
  49     _db="$1"
  50
  51     if $use_tdb_tool_check ; then
  52         # tdbtool always exits with 0  :-(
  53         if timeout 10 tdbtool "$_db" check 2>/dev/null |
  54             grep -q "Database integrity is OK" ; then
  55             return 0
  56         else
  57             return 1
  58         fi
  59     else
  60         timeout 10 tdbdump "$_db" >/dev/null 2>/dev/null
  61         return $?
  62     fi
  63 }
  64
  65 check_persistent_databases ()
  66 {
  67     _dir="${CTDB_DBDIR_PERSISTENT:-${CTDB_DBDIR:-${CTDB_VARDIR}}/persistent}"
  68     [ -d "$_dir" ] || return 0
  69
  70     [ "${CTDB_MAX_PERSISTENT_CHECK_ERRORS:-0}" = "0" ] || return 0
  71
  72     for _db in $(ls "$_dir/"*.tdb.*[0-9] 2>/dev/null) ; do
  73         check_tdb $_db || {
  74             echo "Persistent database $_db is corrupted! CTDB will not start."
  75             return 1
  76         }
  77     done
  78 }
  79
  80 check_non_persistent_databases ()
  81 {
  82     _dir="${CTDB_DBDIR:-${CTDB_VARDIR}}"
  83     [ -d "$_dir" ] || return 0
  84
  85     for _db in $(ls "${_dir}/"*.tdb.*[0-9] 2>/dev/null) ; do
  86         check_tdb $_db || {
  87             _backup="${_db}.$(date +'%Y%m%d.%H%M%S.%N').corrupt"
  88             cat <<EOF
  89 WARNING: database ${_db} is corrupted.
  90  Moving to backup ${_backup} for later analysis.
  91 EOF
  92             mv "$_db" "$_backup"
  93
  94             # Now remove excess backups
  95             ls -td "${_db}."*".corrupt" |
  96             tail -n +$((${CTDB_MAX_CORRUPT_DB_BACKUPS:-10} + 1)) |
  97             xargs rm -f
  98
  99         }
 100     done
 101 }
 102
 103 set_ctdb_variables ()
 104 {
 105     # set any tunables from the config file
 106     set | sed -n '/^CTDB_SET_/s/=.*//p' |
 107     while read v; do
 108         varname="${v#CTDB_SET_}"
 109         value=$(eval echo "\$$v")
 110         if ctdb setvar $varname $value ; then
 111             echo "Set $varname to $value"
 112         else
 113             echo "Invalid configuration: CTDB_SET_${varname}=${value}"
 114             return 1
 115         fi
 116     done
 117 }
 118
 119 ############################################################
 120
 121 ctdb_check_args "$@"
 122
 123 case "$1" in
 124      init)
 125         # make sure we have a blank state directory for the scripts to work with
 126         rm -rf "$CTDB_SCRIPT_VARDIR"
 127         mkdir -p "$CTDB_SCRIPT_VARDIR" || \
 128             die "mkdir -p ${CTDB_SCRIPT_VARDIR} - failed - ${ret}" $?
 129
 130         if select_tdb_checker ; then
 131             check_persistent_databases || exit $?
 132             check_non_persistent_databases
 133         fi
 134         ;;
 135
 136     setup)
 137         # Set any tunables from the config file
 138         set_ctdb_variables || \
 139             die "Aborting setup due to invalid configuration - fix typos, remove unknown tunables"
 140         ;;
 141
 142     startup)
 143         ctdb attach ctdb.tdb persistent
 144         ;;
 145
 146     *)
 147         ctdb_standard_event_handler "$@"
 148         ;;
 149 esac
 150
 151 # all OK
 152 exit 0