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|
#!/bin/sh
# Event script for ctdb-specific setup and other things that don't fit
# elsewhere.
[ -n "$CTDB_BASE" ] || \
CTDB_BASE=$(d=$(dirname "$0") ; cd -P "$d" ; dirname "$PWD")
. "${CTDB_BASE}/functions"
load_script_options
############################################################
# type is commonly supported and more portable than which(1)
# shellcheck disable=SC2039
select_tdb_checker ()
{
# Find the best TDB consistency check available.
use_tdb_tool_check=false
type tdbtool >/dev/null 2>&1 && found_tdbtool=true
type tdbdump >/dev/null 2>&1 && found_tdbdump=true
if $found_tdbtool && echo "help" | tdbtool | grep -q check ; then
use_tdb_tool_check=true
elif $found_tdbtool && $found_tdbdump ; then
cat <<EOF
WARNING: The installed 'tdbtool' does not offer the 'check' subcommand.
Using 'tdbdump' for database checks.
Consider updating 'tdbtool' for better checks!
EOF
elif $found_tdbdump ; then
cat <<EOF
WARNING: 'tdbtool' is not available.
Using 'tdbdump' to check the databases.
Consider installing a recent 'tdbtool' for better checks!
EOF
else
cat <<EOF
WARNING: Cannot check databases since neither
'tdbdump' nor 'tdbtool check' is available.
Consider installing tdbtool or at least tdbdump!
EOF
return 1
fi
}
check_tdb ()
{
_db="$1"
if $use_tdb_tool_check ; then
# tdbtool always exits with 0 :-(
if timeout 10 tdbtool "$_db" check 2>/dev/null |
grep -q "Database integrity is OK" ; then
return 0
else
return 1
fi
else
timeout 10 tdbdump "$_db" >/dev/null 2>/dev/null
return $?
fi
}
check_persistent_databases ()
{
_dir="${CTDB_DBDIR_PERSISTENT:-${CTDB_VARDIR}/persistent}"
[ -d "$_dir" ] || return 0
[ "${CTDB_MAX_PERSISTENT_CHECK_ERRORS:-0}" = "0" ] || return 0
for _db in "$_dir/"*.tdb.*[0-9] ; do
[ -r "$_db" ] || continue
check_tdb "$_db" || \
die "Persistent database $_db is corrupted! CTDB will not start."
done
}
check_non_persistent_databases ()
{
_dir="${CTDB_DBDIR:-${CTDB_VARDIR}}"
[ -d "$_dir" ] || return 0
for _db in "${_dir}/"*.tdb.*[0-9] ; do
[ -r "$_db" ] || continue
check_tdb "$_db" || {
_backup="${_db}.$(date +'%Y%m%d.%H%M%S.%N').corrupt"
cat <<EOF
WARNING: database ${_db} is corrupted.
Moving to backup ${_backup} for later analysis.
EOF
mv "$_db" "$_backup"
# Now remove excess backups
_max="${CTDB_MAX_CORRUPT_DB_BACKUPS:-10}"
_bdb="${_db##*/}" # basename
find "$_dir" -name "${_bdb}.*.corrupt" |
sort -r |
tail -n +$((_max + 1)) |
xargs rm -f
}
done
}
set_ctdb_variables ()
{
_f="${CTDB_BASE}/ctdb.tunables"
if [ ! -r "$_f" ] ; then
return
fi
while IFS="=" read _var _val ; do
case "$_var" in
\#*|"") continue ;;
esac
if $CTDB setvar "$_var" "$_val" ; then
echo "Set $_var to $_val"
else
echo "Invalid tunable: ${_var}=${_val}"
return 1
fi
done <"$_f"
}
############################################################
ctdb_check_args "$@"
case "$1" in
init)
# make sure we have a blank state directory for the scripts to work with
rm -rf "$CTDB_SCRIPT_VARDIR"
mkdir -p "$CTDB_SCRIPT_VARDIR" || \
die "mkdir -p ${CTDB_SCRIPT_VARDIR} - failed - $?" $?
if select_tdb_checker ; then
check_persistent_databases || exit $?
check_non_persistent_databases
fi
;;
setup)
# Set any tunables from the config file
set_ctdb_variables || \
die "Aborting setup due to invalid configuration - fix typos, remove unknown tunables"
;;
startup)
$CTDB attach ctdb.tdb persistent
;;
esac
# all OK
exit 0
|
