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-rwxr-xr-xctdb/config/functions1172
1 files changed, 1172 insertions, 0 deletions
diff --git a/ctdb/config/functions b/ctdb/config/functions
new file mode 100755
index 0000000..a40b276
--- /dev/null
+++ b/ctdb/config/functions
@@ -0,0 +1,1172 @@
+# Hey Emacs, this is a -*- shell-script -*- !!!
+
+# utility functions for ctdb event scripts
+
+if [ -z "$CTDB_BASE" ]; then
+ echo 'CTDB_BASE unset in CTDB functions file'
+ exit 1
+fi
+export CTDB_BASE
+
+# CTDB_VARDIR is used elsewhere
+# shellcheck disable=SC2034
+CTDB_VARDIR="/usr/local/var/lib/ctdb"
+
+CTDB="${CTDB:-/usr/local/bin/ctdb}"
+
+# Only (and always) override these variables in test code
+
+if [ -z "$CTDB_SCRIPT_VARDIR" ]; then
+ CTDB_SCRIPT_VARDIR="/usr/local/var/lib/ctdb/scripts"
+fi
+
+if [ -z "$CTDB_SYS_ETCDIR" ]; then
+ CTDB_SYS_ETCDIR="/etc"
+fi
+
+if [ -z "$CTDB_HELPER_BINDIR" ]; then
+ CTDB_HELPER_BINDIR="/usr/local/libexec/ctdb"
+fi
+
+#######################################
+# pull in a system config file, if any
+
+load_system_config()
+{
+ for _i; do
+
+ if [ -f "${CTDB_SYS_ETCDIR}/sysconfig/${_i}" ]; then
+ . "${CTDB_SYS_ETCDIR}/sysconfig/${_i}"
+ return
+ elif [ -f "${CTDB_SYS_ETCDIR}/default/${_i}" ]; then
+ . "${CTDB_SYS_ETCDIR}/default/${_i}"
+ return
+ fi
+ done
+}
+
+# load_script_options [ component script ]
+# script is an event script name relative to a component
+# component is currently ignored
+load_script_options()
+{
+ if [ $# -eq 2 ]; then
+ _script="$2"
+ elif [ $# -eq 0 ]; then
+ _script=""
+ else
+ die "usage: load_script_options [ component script ]"
+ fi
+
+ _options="${CTDB_BASE}/script.options"
+
+ if [ -r "$_options" ]; then
+ . "$_options"
+ fi
+
+ if [ -n "$_script" ]; then
+ _s="${CTDB_BASE}/events/legacy/${_script}"
+ else
+ _s="${0%.script}"
+ fi
+ _options="${_s}.options"
+
+ if [ -r "$_options" ]; then
+ . "$_options"
+ fi
+}
+
+##############################################################
+
+die()
+{
+ _msg="$1"
+ _rc="${2:-1}"
+
+ echo "$_msg" >&2
+ exit "$_rc"
+}
+
+# Log given message or stdin to either syslog or a CTDB log file
+# $1 is the tag passed to logger if syslog is in use.
+script_log()
+{
+ _tag="$1"
+ shift
+
+ case "$CTDB_LOGGING" in
+ file:)
+ if [ -n "$*" ] ; then
+ echo "$*"
+ else
+ cat
+ fi >&2
+ ;;
+ file:* | "")
+ if [ -n "$CTDB_LOGGING" ]; then
+ _file="${CTDB_LOGGING#file:}"
+ else
+ _file="/usr/local/var/log/log.ctdb"
+ fi
+ {
+ if [ -n "$*" ]; then
+ echo "$*"
+ else
+ cat
+ fi
+ } >>"$_file"
+ ;;
+ *)
+ # Handle all syslog:* variants here too. There's no tool to do
+ # the lossy things, so just use logger.
+ logger -t "ctdbd: ${_tag}" "$@"
+ ;;
+ esac
+}
+
+# When things are run in the background in an eventscript then logging
+# output might get lost. This is the "solution". :-)
+background_with_logging()
+{
+ (
+ "$@" 2>&1 </dev/null |
+ script_log "${script_name}&"
+ ) &
+
+ return 0
+}
+
+##############################################################
+# check number of args for different events
+ctdb_check_args()
+{
+ case "$1" in
+ takeip | releaseip)
+ if [ $# != 4 ]; then
+ echo "ERROR: must supply interface, IP and maskbits"
+ exit 1
+ fi
+ ;;
+ updateip)
+ if [ $# != 5 ]; then
+ echo "ERROR: must supply old interface, new interface, IP and maskbits"
+ exit 1
+ fi
+ ;;
+ esac
+}
+
+##############################################################
+# determine on what type of system (init style) we are running
+detect_init_style()
+{
+ _init_style_file="${CTDB_SCRIPT_VARDIR}/init-style"
+
+ if [ ! -f "$_init_style_file" ]; then
+ if [ -n "$CTDB_INIT_STYLE" ]; then
+ echo "$CTDB_INIT_STYLE" >"$_init_style_file"
+ return
+ fi
+
+ # Subshell to contain variables in os-release file
+ (
+ _os_release="${CTDB_SYS_ETCDIR}/os-release"
+ if [ -f "$_os_release" ]; then
+ . "$_os_release"
+ case "$ID" in
+ centos | fedora | rhel)
+ echo "redhat"
+ ;;
+ debian | ubuntu)
+ echo "debian"
+ ;;
+ sles | suse)
+ echo "suse"
+ ;;
+ *)
+ case "$ID_LIKE" in
+ *centos* | *rhel*)
+ echo "redhat"
+ ;;
+ *)
+ echo "$ID"
+ ;;
+ esac
+ ;;
+ esac
+ else
+ echo "WARNING: unknown distribution ${ID}" >&2
+ echo "unknown"
+ fi
+ ) >"$_init_style_file"
+ fi
+
+ read -r CTDB_INIT_STYLE <"$_init_style_file"
+}
+
+######################################################
+# simulate /sbin/service on platforms that don't have it
+# _service() makes it easier to hook the service() function for
+# testing.
+_service()
+{
+ _service_name="$1"
+ _op="$2"
+
+ # do nothing, when no service was specified
+ [ -z "$_service_name" ] && return
+
+ if [ -x /sbin/service ]; then
+ $_nice /sbin/service "$_service_name" "$_op"
+ elif [ -x /usr/sbin/service ]; then
+ $_nice /usr/sbin/service "$_service_name" "$_op"
+ elif [ -x /bin/systemctl ]; then
+ $_nice /bin/systemctl "$_op" "$_service_name"
+ elif [ -x "${CTDB_SYS_ETCDIR}/init.d/${_service_name}" ]; then
+ $_nice "${CTDB_SYS_ETCDIR}/init.d/${_service_name}" "$_op"
+ elif [ -x "${CTDB_SYS_ETCDIR}/rc.d/init.d/${_service_name}" ]; then
+ $_nice "${CTDB_SYS_ETCDIR}/rc.d/init.d/${_service_name}" "$_op"
+ fi
+}
+
+service()
+{
+ _nice=""
+ _service "$@"
+}
+
+######################################################
+# simulate /sbin/service (niced) on platforms that don't have it
+nice_service()
+{
+ _nice="nice"
+ _service "$@"
+}
+
+######################################################
+# Cached retrieval of PNN from local node. This never changes so why
+# open a client connection to the server each time this is needed?
+ctdb_get_pnn()
+{
+ _pnn_file="${CTDB_SCRIPT_VARDIR}/my-pnn"
+ if [ ! -f "$_pnn_file" ]; then
+ $CTDB pnn >"$_pnn_file"
+ fi
+
+ cat "$_pnn_file"
+}
+
+# Cached retrieval of private IP address from local node. This never
+# changes.
+ctdb_get_ip_address()
+{
+ _ip_addr_file="${CTDB_SCRIPT_VARDIR}/my-ip-address"
+ if [ ! -f "$_ip_addr_file" ]; then
+ $CTDB -X nodestatus |
+ awk -F '|' 'NR == 2 { print $3 }' >"$_ip_addr_file"
+ fi
+
+ cat "$_ip_addr_file"
+}
+
+# Cached retrieval of database options for use by event scripts.
+#
+# If the variables are already set then they should not be overwritten
+# - this should only happen during event script testing.
+ctdb_get_db_options()
+{
+ _db_opts_file="${CTDB_SCRIPT_VARDIR}/db_options.cache"
+
+ if [ ! -f "$_db_opts_file" ]; then
+ {
+ ctdb_translate_option "database" \
+ "volatile database directory" \
+ "CTDB_DBDIR"
+ ctdb_translate_option "database" \
+ "persistent database directory" \
+ "CTDB_DBDIR_PERSISTENT"
+ ctdb_translate_option "database" \
+ "state database directory" \
+ "CTDB_DBDIR_STATE"
+ } >"$_db_opts_file"
+ fi
+
+ . "$_db_opts_file"
+}
+
+ctdb_translate_option()
+{
+ _section="$1"
+ _opt="$2"
+ _variable="$3"
+
+ # ctdb-config already prints an error if something goes wrong
+ _t=$("${CTDB_HELPER_BINDIR}/ctdb-config" get "$_section" "$_opt") ||
+ exit $?
+ echo "${_variable}=\"${_t}\""
+}
+
+######################################################
+# wrapper around /proc/ settings to allow them to be hooked
+# for testing
+# 1st arg is relative path under /proc/, 2nd arg is value to set
+set_proc()
+{
+ echo "$2" >"/proc/$1"
+}
+
+set_proc_maybe()
+{
+ if [ -w "/proc/$1" ]; then
+ set_proc "$1" "$2"
+ fi
+}
+
+######################################################
+# wrapper around getting file contents from /proc/ to allow
+# this to be hooked for testing
+# 1st arg is relative path under /proc/
+get_proc()
+{
+ cat "/proc/$1"
+}
+
+######################################################
+# Print up to $_max kernel stack traces for processes named $_program
+program_stack_traces()
+{
+ _prog="$1"
+ _max="${2:-1}"
+
+ _count=1
+ for _pid in $(pidof "$_prog"); do
+ [ "$_count" -le "$_max" ] || break
+
+ # Do this first to avoid racing with process exit
+ _stack=$(get_proc "${_pid}/stack" 2>/dev/null)
+ if [ -n "$_stack" ]; then
+ echo "Stack trace for ${_prog}[${_pid}]:"
+ echo "$_stack"
+ _count=$((_count + 1))
+ fi
+ done
+}
+
+######################################################
+# Ensure $service_name is set
+assert_service_name()
+{
+ # service_name is set by the event script
+ # shellcheck disable=SC2154
+ [ -n "$service_name" ] || die "INTERNAL ERROR: \$service_name not set"
+}
+
+######################################################
+# check a set of directories is available
+# return 1 on a missing directory
+# directories are read from stdin
+######################################################
+ctdb_check_directories_probe()
+{
+ while IFS="" read -r d; do
+ case "$d" in
+ *%*)
+ continue
+ ;;
+ *)
+ [ -d "${d}/." ] || return 1
+ ;;
+ esac
+ done
+}
+
+######################################################
+# check a set of directories is available
+# directories are read from stdin
+######################################################
+ctdb_check_directories()
+{
+ ctdb_check_directories_probe || {
+ echo "ERROR: $service_name directory \"$d\" not available"
+ exit 1
+ }
+}
+
+######################################################
+# check a set of tcp ports
+# usage: ctdb_check_tcp_ports <ports...>
+######################################################
+
+# Check whether something is listening on all of the given TCP ports
+# using the "ctdb checktcpport" command.
+ctdb_check_tcp_ports()
+{
+ if [ -z "$1" ]; then
+ echo "INTERNAL ERROR: ctdb_check_tcp_ports - no ports specified"
+ exit 1
+ fi
+
+ for _p; do # process each function argument (port)
+ _cmd="$CTDB checktcpport $_p"
+ _out=$($_cmd 2>&1)
+ _ret=$?
+ case "$_ret" in
+ 0)
+ echo "$service_name not listening on TCP port $_p"
+ return 1
+ ;;
+ 98)
+ # Couldn't bind, something already listening, next port
+ continue
+ ;;
+ *)
+ echo "unexpected error (${_ret}) running \"${_cmd}\""
+ if [ -n "$_out" ]; then
+ echo "$_out"
+ fi
+ return $_ret
+ ;;
+ esac
+ done
+
+ # All ports listening
+ return 0
+}
+
+######################################################
+# check a unix socket
+# usage: ctdb_check_unix_socket SOCKPATH
+######################################################
+ctdb_check_unix_socket()
+{
+ _sockpath="$1"
+
+ if [ -z "$_sockpath" ]; then
+ echo "ERROR: ctdb_check_unix_socket() requires socket path"
+ return 1
+ fi
+
+ _out=$(ss -l -x "src ${_sockpath}" | tail -n +2)
+ if [ -z "$_out" ]; then
+ echo "ERROR: ${service_name} not listening on ${_sockpath}"
+ return 1
+ fi
+}
+
+################################################
+# kill off any TCP connections with the given IP
+################################################
+kill_tcp_connections()
+{
+ _iface="$1"
+ _ip="$2"
+
+ _oneway=false
+ if [ "$3" = "oneway" ]; then
+ _oneway=true
+ fi
+
+ get_tcp_connections_for_ip "$_ip" | {
+ _killcount=0
+ _connections=""
+ _nl="
+"
+ while read -r _dst _src; do
+ _destport="${_dst##*:}"
+ __oneway=$_oneway
+ case $_destport in
+ # we only do one-way killtcp for CIFS
+ 139 | 445) __oneway=true ;;
+ esac
+
+ _connections="${_connections}${_nl}${_src} ${_dst}"
+ if ! $__oneway; then
+ _connections="${_connections}${_nl}${_dst} ${_src}"
+ fi
+
+ _killcount=$((_killcount + 1))
+ done
+
+ if [ $_killcount -eq 0 ]; then
+ return
+ fi
+
+ if [ -n "$CTDB_KILLTCP_DEBUGLEVEL" ]; then
+ _debuglevel="$CTDB_KILLTCP_DEBUGLEVEL"
+ else
+ _debuglevel="$CTDB_DEBUGLEVEL"
+ fi
+ echo "$_connections" |
+ CTDB_DEBUGLEVEL="$_debuglevel" \
+ "${CTDB_HELPER_BINDIR}/ctdb_killtcp" "$_iface" || {
+ echo "Failed to kill TCP connections"
+ return
+ }
+
+ _connections=$(get_tcp_connections_for_ip "$_ip")
+ if [ -z "$_connections" ]; then
+ _remaining=0
+ else
+ _remaining=$(echo "$_connections" | wc -l)
+ fi
+
+ _actually_killed=$((_killcount - _remaining))
+
+ _t="${_actually_killed}/${_killcount}"
+ echo "Killed ${_t} TCP connections to released IP $_ip"
+
+ if [ -n "$_connections" ]; then
+ echo "Remaining connections:"
+ echo "$_connections" | sed -e 's|^| |'
+ fi
+ }
+}
+
+##################################################################
+# kill off the local end for any TCP connections with the given IP
+##################################################################
+kill_tcp_connections_local_only()
+{
+ kill_tcp_connections "$@" "oneway"
+}
+
+##################################################################
+# tickle any TCP connections with the given IP
+##################################################################
+tickle_tcp_connections()
+{
+ _ip="$1"
+
+ # Get connections, both directions
+ _conns=$(get_tcp_connections_for_ip "$_ip" |
+ awk '{ print $1, $2 ; print $2, $1 }')
+
+ echo "$_conns" | awk '{ print "Tickle TCP connection", $1, $2 }'
+ echo "$_conns" | ctdb tickle
+}
+
+get_tcp_connections_for_ip()
+{
+ _ip="$1"
+
+ ss -tn state established "src [$_ip]" | awk 'NR > 1 {print $3, $4}'
+}
+
+########################################################
+
+add_ip_to_iface()
+{
+ _iface=$1
+ _ip=$2
+ _maskbits=$3
+
+ # Ensure interface is up
+ ip link set "$_iface" up ||
+ die "Failed to bringup interface $_iface"
+
+ # Only need to define broadcast for IPv4
+ case "$_ip" in
+ *:*) _bcast="" ;;
+ *) _bcast="brd +" ;;
+ esac
+
+ # Intentionally unquoted multi-word value here
+ # shellcheck disable=SC2086
+ ip addr add "$_ip/$_maskbits" $_bcast dev "$_iface" || {
+ echo "Failed to add $_ip/$_maskbits on dev $_iface"
+ return 1
+ }
+
+ # Wait 5 seconds for IPv6 addresses to stop being tentative...
+ if [ -z "$_bcast" ]; then
+ for _x in $(seq 1 10); do
+ ip addr show to "${_ip}/128" | grep -q "tentative" || break
+ sleep 0.5
+ done
+
+ # If the address was a duplicate then it won't be on the
+ # interface so flag an error.
+ _t=$(ip addr show to "${_ip}/128")
+ case "$_t" in
+ "")
+ echo "Failed to add $_ip/$_maskbits on dev $_iface"
+ return 1
+ ;;
+ *tentative* | *dadfailed*)
+ echo "Failed to add $_ip/$_maskbits on dev $_iface"
+ ip addr del "$_ip/$_maskbits" dev "$_iface"
+ return 1
+ ;;
+ esac
+ fi
+}
+
+delete_ip_from_iface()
+{
+ _iface=$1
+ _ip=$2
+ _maskbits=$3
+
+ # This could be set globally for all interfaces but it is probably
+ # better to avoid surprises, so limit it the interfaces where CTDB
+ # has public IP addresses. There isn't anywhere else convenient
+ # to do this so just set it each time. This is much cheaper than
+ # remembering and re-adding secondaries.
+ set_proc "sys/net/ipv4/conf/${_iface}/promote_secondaries" 1
+
+ ip addr del "$_ip/$_maskbits" dev "$_iface" || {
+ echo "Failed to del $_ip on dev $_iface"
+ return 1
+ }
+}
+
+# If the given IP is hosted then print 2 items: maskbits and iface
+ip_maskbits_iface()
+{
+ _addr="$1"
+
+ case "$_addr" in
+ *:*) _bits=128 ;;
+ *) _bits=32 ;;
+ esac
+ ip addr show to "${_addr}/${_bits}" 2>/dev/null |
+ awk 'NR == 1 { iface = $2; sub(":$", "", iface) ;
+ sub("@.*", "", iface) }
+ $1 ~ /inet/ { mask = $2; sub(".*/", "", mask);
+ print mask, iface }'
+}
+
+drop_ip()
+{
+ _addr="${1%/*}" # Remove optional maskbits
+
+ # Intentional word splitting here
+ # shellcheck disable=SC2046
+ set -- $(ip_maskbits_iface "$_addr")
+ if [ -n "$1" ]; then
+ _maskbits="$1"
+ _iface="$2"
+ echo "Removing public address $_addr/$_maskbits from device $_iface"
+ delete_ip_from_iface "$_iface" "$_addr" "$_maskbits" >/dev/null 2>&1
+ fi
+}
+
+drop_all_public_ips()
+{
+ # _x is intentionally ignored
+ # shellcheck disable=SC2034
+ while read -r _ip _x; do
+ case "$_ip" in
+ \#*) continue ;;
+ esac
+ drop_ip "$_ip"
+ done <"${CTDB_BASE}/public_addresses"
+}
+
+flush_route_cache()
+{
+ set_proc_maybe sys/net/ipv4/route/flush 1
+ set_proc_maybe sys/net/ipv6/route/flush 1
+}
+
+########################################################
+# Interface monitoring
+
+# If the interface is a virtual one (e.g. VLAN) then get the
+# underlying interface
+interface_get_real()
+{
+ _iface="$1"
+
+ # If $_iface is a VLAN (i.e. contains an '@') then strip every
+ # before the '@', otherwise print the whole interface
+ echo "${_iface##*@}"
+}
+
+# Check whether an interface is operational
+interface_monitor()
+{
+ _iface="$1"
+
+ _iface_info=$(ip -br link show "$_iface" 2>&1) || {
+ echo "ERROR: Monitored interface ${_iface} does not exist"
+ return 1
+ }
+
+ # If the interface is a virtual one (e.g. VLAN) then get the
+ # underlying interface.
+ _realiface=$(interface_get_real "${_iface_info%% *}")
+
+ if _bi=$(get_proc "net/bonding/${_realiface}" 2>/dev/null); then
+ # This is a bond: various monitoring strategies
+ echo "$_bi" | grep -q 'Currently Active Slave: None' && {
+ echo "ERROR: No active slaves for bond device ${_realiface}"
+ return 1
+ }
+ echo "$_bi" | grep -q '^MII Status: up' || {
+ echo "ERROR: public network interface ${_realiface} is down"
+ return 1
+ }
+ echo "$_bi" | grep -q '^Bonding Mode: IEEE 802.3ad Dynamic link aggregation' && {
+ # This works around a bug in the driver where the
+ # overall bond status can be up but none of the actual
+ # physical interfaces have a link.
+ echo "$_bi" | grep 'MII Status:' | tail -n +2 | grep -q '^MII Status: up' || {
+ echo "ERROR: No active slaves for 802.ad bond device ${_realiface}"
+ return 1
+ }
+ }
+
+ return 0
+ else
+ # Not a bond
+ case "$_iface" in
+ lo*)
+ # loopback is always working
+ return 0
+ ;;
+ ib*)
+ # we don't know how to test ib links
+ return 0
+ ;;
+ *)
+ ethtool "$_iface" | grep -q 'Link detected: yes' || {
+ # On some systems, this is not successful when a
+ # cable is plugged but the interface has not been
+ # brought up previously. Bring the interface up
+ # and try again...
+ ip link set "$_iface" up
+ ethtool "$_iface" | grep -q 'Link detected: yes' || {
+ echo "ERROR: No link on the public network interface ${_iface}"
+ return 1
+ }
+ }
+ return 0
+ ;;
+ esac
+ fi
+}
+
+########################################################
+# Simple counters
+_ctdb_counter_common()
+{
+ [ $# -le 1 ] || die "usage: _ctdb_counter_common [name]"
+
+ if [ $# -eq 1 ]; then
+ _counter_name="${1}.failcount"
+ else
+ _counter_name="failcount"
+ fi
+
+ if [ -z "$script_state_dir" ]; then
+ die "ctdb_counter_* functions need ctdb_setup_state_dir()"
+ fi
+
+ _counter_file="${script_state_dir}/${_counter_name}"
+}
+# Some code passes an argument
+# shellcheck disable=SC2120
+ctdb_counter_init()
+{
+ _ctdb_counter_common "$1"
+
+ : >"$_counter_file"
+}
+ctdb_counter_incr()
+{
+ _ctdb_counter_common "$1"
+
+ # unary counting using newlines!
+ echo >>"$_counter_file"
+}
+ctdb_counter_get()
+{
+ _ctdb_counter_common "$1"
+ # unary counting!
+ _val=$(wc -c 2>/dev/null <"$_counter_file" || echo 0)
+ # Strip leading spaces from output of wc (on freebsd)
+ # shellcheck disable=SC2086
+ echo $_val
+}
+
+#
+# Fail counter/threshold combination to control warnings and node unhealthy
+#
+
+_failcount_validate_threshold()
+{
+ case "$1" in
+ "") return 1 ;; # A failure that doesn't need a warning
+ *)
+ if echo "$1" | grep -qx '[0-9]*'; then
+ return 0
+ fi
+
+ echo "WARNING: ${1} is an invalid threshold in \"${2}\" check"
+ return 1
+ ;;
+ esac
+}
+
+_failcount_common()
+{
+ _thing="$1"
+
+ _counter=$(echo "$_thing" | sed -e 's@/@_SLASH_@g' -e 's@ @_@g')
+}
+
+failcount_init()
+{
+ _thing="$1"
+
+ _failcount_common "$_thing"
+
+ ctdb_counter_init "$_counter"
+}
+
+failcount_reset()
+{
+ _thing="$1"
+
+ _failcount_common "$_thing"
+
+ _failcount=$(ctdb_counter_get "$_counter")
+ if [ "$_failcount" -eq 0 ]; then
+ return
+ fi
+
+ printf 'NOTICE: %s: no longer failing\n' "$_thing"
+ ctdb_counter_init "$_counter"
+}
+
+failcount_incr()
+{
+ _thing="$1"
+ _thresholds="$2"
+ _output="$3"
+
+ _failcount_common "$_thing"
+
+ ctdb_counter_incr "$_counter"
+ _failcount=$(ctdb_counter_get "$_counter")
+
+ case "$_thresholds" in
+ *:*)
+ _warn_threshold="${_thresholds%:*}"
+ _unhealthy_threshold="${_thresholds#*:}"
+ ;;
+ "")
+ _warn_threshold=1
+ _unhealthy_threshold=""
+ ;;
+ *)
+ _warn_threshold="$_thresholds"
+ _unhealthy_threshold=""
+ ;;
+ esac
+
+ if _failcount_validate_threshold "$_unhealthy_threshold" "$_thing"; then
+ if [ "$_failcount" -ge "$_unhealthy_threshold" ]; then
+ printf 'ERROR: %s: fail count %d >= threshold %d\n' \
+ "$_thing" \
+ "$_failcount" \
+ "$_unhealthy_threshold"
+ # Only print output when exceeding the
+ # unhealthy threshold
+ if [ "$_failcount" -eq "$_unhealthy_threshold" ] && \
+ [ -n "$_output" ]; then
+ echo "$_output"
+ fi
+ exit 1
+ fi
+ fi
+
+ if _failcount_validate_threshold "$_warn_threshold" "$_thing"; then
+ if [ "$_failcount" -lt "$_warn_threshold" ]; then
+ return 0
+ fi
+ fi
+
+ printf 'WARNING: %s: fail count %d >= threshold %d\n' \
+ "$_thing" \
+ "$_failcount" \
+ "$_warn_threshold"
+ if [ "$_failcount" -eq "$_warn_threshold" ] && [ -n "$_output" ]; then
+ # Only print output when exceeding the warning threshold
+ echo "$_output"
+ fi
+}
+
+########################################################
+
+# ctdb_setup_state_dir <type> <name>
+# Sets/creates script_state_dir)
+ctdb_setup_state_dir()
+{
+ [ $# -eq 2 ] || die "usage: ctdb_setup_state_dir <type> <name>"
+
+ _type="$1"
+ _name="$2"
+
+ script_state_dir="${CTDB_SCRIPT_VARDIR}/${_type}/${_name}"
+
+ mkdir -p "$script_state_dir" ||
+ die "Error creating script state dir \"${script_state_dir}\""
+}
+
+##################################################################
+# Reconfigure a service on demand
+
+_ctdb_service_reconfigure_common()
+{
+ if [ -z "$script_state_dir" ]; then
+ die "ctdb_service_*_reconfigure() needs ctdb_setup_state_dir()"
+ fi
+
+ _ctdb_service_reconfigure_flag="${script_state_dir}/need_reconfigure"
+}
+
+ctdb_service_needs_reconfigure()
+{
+ _ctdb_service_reconfigure_common
+ [ -e "$_ctdb_service_reconfigure_flag" ]
+}
+
+ctdb_service_set_reconfigure()
+{
+ _ctdb_service_reconfigure_common
+ : >"$_ctdb_service_reconfigure_flag"
+}
+
+ctdb_service_unset_reconfigure()
+{
+ _ctdb_service_reconfigure_common
+ rm -f "$_ctdb_service_reconfigure_flag"
+}
+
+ctdb_service_reconfigure()
+{
+ echo "Reconfiguring service \"${service_name}\"..."
+ ctdb_service_unset_reconfigure
+ service_reconfigure || return $?
+ # Intentionally have this use $service_name as default
+ # shellcheck disable=SC2119
+ ctdb_counter_init
+}
+
+# Default service_reconfigure() function does nothing.
+service_reconfigure()
+{
+ :
+}
+
+# Default service_start() and service_stop() functions.
+
+# These may be overridden in an eventscript.
+service_start()
+{
+ service "$service_name" start
+}
+
+service_stop()
+{
+ service "$service_name" stop
+}
+
+##################################################################
+
+# This exists only for backward compatibility with 3rd party scripts
+# that call it
+ctdb_standard_event_handler()
+{
+ :
+}
+
+iptables_wrapper()
+{
+ _family="$1"
+ shift
+ if [ "$_family" = "inet6" ]; then
+ _iptables_cmd="ip6tables"
+ else
+ _iptables_cmd="iptables"
+ fi
+
+ # iptables doesn't like being re-entered, so flock-wrap it.
+ flock -w 30 "${CTDB_SCRIPT_VARDIR}/iptables.flock" "$_iptables_cmd" "$@"
+}
+
+# AIX (and perhaps others?) doesn't have mktemp
+# type is commonly supported and more portable than which(1)
+# shellcheck disable=SC2039
+if ! type mktemp >/dev/null 2>&1; then
+ mktemp()
+ {
+ _dir=false
+ if [ "$1" = "-d" ]; then
+ _dir=true
+ shift
+ fi
+ _d="${TMPDIR:-/tmp}"
+ _hex10=$(dd if=/dev/urandom count=20 2>/dev/null |
+ cksum |
+ awk '{print $1}')
+ _t="${_d}/tmp.${_hex10}"
+ (
+ umask 077
+ if $_dir; then
+ mkdir "$_t"
+ else
+ : >"$_t"
+ fi
+ )
+ echo "$_t"
+ }
+fi
+
+######################################################################
+# NFS callout handling
+
+nfs_callout_init()
+{
+ _state_dir="$1"
+
+ if [ -z "$CTDB_NFS_CALLOUT" ]; then
+ CTDB_NFS_CALLOUT="${CTDB_BASE}/nfs-linux-kernel-callout"
+ fi
+ # Always export, for statd callout
+ export CTDB_NFS_CALLOUT
+
+ # If the callout wants to use this then it must create it
+ export CTDB_NFS_CALLOUT_STATE_DIR="${_state_dir}/callout-state"
+
+ # Export, if set, for use by clustered NFS callouts
+ if [ -n "$CTDB_NFS_STATE_FS_TYPE" ]; then
+ export CTDB_NFS_STATE_FS_TYPE
+ fi
+ if [ -n "$CTDB_NFS_STATE_MNT" ]; then
+ export CTDB_NFS_STATE_MNT
+ fi
+
+ nfs_callout_cache="${_state_dir}/nfs_callout_cache"
+ nfs_callout_cache_callout="${nfs_callout_cache}/CTDB_NFS_CALLOUT"
+ nfs_callout_cache_ops="${nfs_callout_cache}/ops"
+}
+
+nfs_callout_register()
+{
+ mkdir -p "$nfs_callout_cache_ops"
+ rm -f "$nfs_callout_cache_ops"/*
+
+ echo "$CTDB_NFS_CALLOUT" >"$nfs_callout_cache_callout"
+
+ _t=$("$CTDB_NFS_CALLOUT" "register")
+ if [ -n "$_t" ]; then
+ echo "$_t" |
+ while IFS="" read -r _op; do
+ touch "${nfs_callout_cache_ops}/${_op}"
+ done
+ else
+ touch "${nfs_callout_cache_ops}/ALL"
+ fi
+}
+
+nfs_callout()
+{
+ # Re-run registration if $CTDB_NFS_CALLOUT has changed
+ _prev=""
+ if [ -r "$nfs_callout_cache_callout" ]; then
+ read -r _prev <"$nfs_callout_cache_callout"
+ fi
+ if [ "$CTDB_NFS_CALLOUT" != "$_prev" ]; then
+ nfs_callout_register
+ fi
+
+ # Run the operation if it is registered...
+ if [ -e "${nfs_callout_cache_ops}/${1}" ] ||
+ [ -e "${nfs_callout_cache_ops}/ALL" ]; then
+ "$CTDB_NFS_CALLOUT" "$@"
+ fi
+}
+
+########################################################
+# tickle handling
+########################################################
+
+update_tickles()
+{
+ _port="$1"
+
+ tickledir="${CTDB_SCRIPT_VARDIR}/tickles"
+ mkdir -p "$tickledir"
+
+ # What public IPs do I hold?
+ _pnn=$(ctdb_get_pnn)
+ _ips=$($CTDB -X ip | awk -F'|' -v pnn="$_pnn" '$3 == pnn {print $2}')
+
+ # IPs and port as ss filters
+ _ip_filter=""
+ for _ip in $_ips; do
+ _ip_filter="${_ip_filter}${_ip_filter:+ || }src [${_ip}]"
+ done
+ _port_filter="sport == :${_port}"
+
+ # Record connections to our public IPs in a temporary file.
+ # This temporary file is in CTDB's private state directory and
+ # $$ is used to avoid a very rare race involving CTDB's script
+ # debugging. No security issue, nothing to see here...
+ _my_connections="${tickledir}/${_port}.connections.$$"
+ # Parentheses are needed around the filters for precedence but
+ # the parentheses can't be empty!
+ #
+ # Recent versions of ss print square brackets around IPv6
+ # addresses. While it is desirable to update CTDB's address
+ # parsing and printing code, something needs to be done here
+ # for backward compatibility, so just delete the brackets.
+ ss -tn state established \
+ "${_ip_filter:+( ${_ip_filter} )}" \
+ "${_port_filter:+( ${_port_filter} )}" |
+ awk 'NR > 1 {print $4, $3}' |
+ tr -d '][' |
+ sort >"$_my_connections"
+
+ # Record our current tickles in a temporary file
+ _my_tickles="${tickledir}/${_port}.tickles.$$"
+ for _i in $_ips; do
+ $CTDB -X gettickles "$_i" "$_port" |
+ awk -F'|' 'NR > 1 { printf "%s:%s %s:%s\n", $2, $3, $4, $5 }'
+ done |
+ sort >"$_my_tickles"
+
+ # Add tickles for connections that we haven't already got tickles for
+ comm -23 "$_my_connections" "$_my_tickles" |
+ $CTDB addtickle
+
+ # Remove tickles for connections that are no longer there
+ comm -13 "$_my_connections" "$_my_tickles" |
+ $CTDB deltickle
+
+ rm -f "$_my_connections" "$_my_tickles"
+
+ # Remove stale files from killed scripts
+ # Files can't have spaces in name, more portable than -print0/-0
+ # shellcheck disable=SC2038
+ (cd "$tickledir" && find . -type f -mmin +10 | xargs -r rm)
+}
+
+########################################################
+# load a site local config file
+########################################################
+
+[ -x "${CTDB_BASE}/rc.local" ] && {
+ . "${CTDB_BASE}/rc.local"
+}
+
+[ -d "${CTDB_BASE}/rc.local.d" ] && {
+ for i in "${CTDB_BASE}/rc.local.d"/*; do
+ [ -x "$i" ] && . "$i"
+ done
+}
+
+script_name="${0##*/}" # basename