# utility functions for ctdb event scripts
-[ -z "$CTDB_VARDIR" ] && {
- if [ -d "/var/lib/ctdb" ] ; then
- export CTDB_VARDIR="/var/lib/ctdb"
- else
- export CTDB_VARDIR="/var/ctdb"
- fi
-}
-[ -z "$CTDB_ETCDIR" ] && {
- export CTDB_ETCDIR="/etc"
-}
+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
-_loadconfig() {
- if [ -z "$1" ] ; then
- foo="${service_config:-${service_name}}"
- if [ -n "$foo" ] ; then
- loadconfig "$foo"
- return
- fi
- fi
-
- if [ "$1" != "ctdb" ] ; then
- loadconfig "ctdb"
- fi
-
- if [ -z "$1" ] ; then
- return
- fi
-
- if [ -f $CTDB_ETCDIR/sysconfig/$1 ]; then
- . $CTDB_ETCDIR/sysconfig/$1
- elif [ -f $CTDB_ETCDIR/default/$1 ]; then
- . $CTDB_ETCDIR/default/$1
- elif [ -f $CTDB_BASE/sysconfig/$1 ]; then
- . $CTDB_BASE/sysconfig/$1
- fi
-
- if [ "$1" = "ctdb" ] ; then
- _config="${CTDB_BASE}/ctdbd.conf"
- if [ -r "$_config" ] ; then
- . "$_config"
- fi
- fi
+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
}
-loadconfig () {
- _loadconfig "$@"
-}
+# 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"
-# CTDB_SCRIPT_DEBUGLEVEL can be overwritten by setting it in a
-# configuration file.
-debug ()
-{
- if [ ${CTDB_SCRIPT_DEBUGLEVEL:-2} -ge 4 ] ; then
- # If there are arguments then echo them. Otherwise expect to
- # use stdin, which allows us to pass lots of debug using a
- # here document.
- if [ -n "$1" ] ; then
- echo "DEBUG: $*"
+ if [ -r "$_options" ]; then
+ . "$_options"
+ fi
+
+ if [ -n "$_script" ]; then
+ _s="${CTDB_BASE}/events/legacy/${_script}"
else
- sed -e 's@^@DEBUG: @'
+ _s="${0%.script}"
fi
- else
- if [ -z "$1" ] ; then
- cat >/dev/null
+ _options="${_s}.options"
+
+ if [ -r "$_options" ]; then
+ . "$_options"
fi
- fi
}
-die ()
+##############################################################
+
+die()
{
- _msg="$1"
- _rc="${2:-1}"
+ _msg="$1"
+ _rc="${2:-1}"
- echo "$_msg"
- exit $_rc
+ echo "$_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 ()
+script_log()
{
- _tag="$1" ; shift
-
- case "$CTDB_LOGGING" in
- file:*|"")
- if [ -n "$CTDB_LOGGING" ] ; then
- _file="${CTDB_LOGGING#file:}"
- else
- _file="/var/log/log.ctdb"
- fi
- {
+ _tag="$1"
+ shift
+
+ case "$CTDB_LOGGING" in
+ file:)
if [ -n "$*" ] ; then
- echo "$*"
+ echo "$*"
else
- cat
+ cat
+ fi >&2
+ ;;
+ file:* | "")
+ if [ -n "$CTDB_LOGGING" ]; then
+ _file="${CTDB_LOGGING#file:}"
+ else
+ _file="/usr/local/var/log/log.ctdb"
fi
- } >>"$_file"
- ;;
+ {
+ 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
+ # 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 ()
+background_with_logging()
{
- (
- "$@" 2>&1 </dev/null |
- script_log "${script_name}&"
- )&
+ (
+ "$@" 2>&1 </dev/null |
+ script_log "${script_name}&"
+ ) &
- return 0
+ return 0
}
##############################################################
# check number of args for different events
-ctdb_check_args ()
+ctdb_check_args()
{
- case "$1" in
- takeip|releaseip)
- if [ $# != 4 ]; then
- echo "ERROR: must supply interface, IP and maskbits"
- exit 1
- fi
- ;;
+ 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
+ if [ $# != 5 ]; then
+ echo "ERROR: must supply old interface, new interface, IP and maskbits"
+ exit 1
+ fi
+ ;;
+ esac
}
##############################################################
# determine on what type of system (init style) we are running
detect_init_style()
{
- # only do detection if not already set:
- [ -z "$CTDB_INIT_STYLE" ] || return
-
- if [ -x /sbin/startproc ]; then
- CTDB_INIT_STYLE="suse"
- elif [ -x /sbin/start-stop-daemon ]; then
- CTDB_INIT_STYLE="debian"
- else
- CTDB_INIT_STYLE="redhat"
- fi
+ _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()
{
- _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 $CTDB_ETCDIR/init.d/$_service_name ]; then
- $_nice $CTDB_ETCDIR/init.d/$_service_name "$_op"
- elif [ -x $CTDB_ETCDIR/rc.d/init.d/$_service_name ]; then
- $_nice $CTDB_ETCDIR/rc.d/init.d/$_service_name "$_op"
- fi
+ _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 "$@"
+ _nice=""
+ _service "$@"
}
######################################################
# simulate /sbin/service (niced) on platforms that don't have it
nice_service()
{
- _nice="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?
-# This sets $pnn - this avoid an unnecessary subprocess.
-ctdb_get_pnn ()
+ctdb_get_pnn()
+{
+ _pnn_file="${CTDB_SCRIPT_VARDIR}/my-pnn"
+ if [ ! -f "$_pnn_file" ]; then
+ $CTDB pnn >"$_pnn_file"
+ fi
+
+ cat "$_pnn_file"
+}
+
+# Cached retrieval of private IP address from local node. This never
+# changes.
+ctdb_get_ip_address()
{
- _pnn_file="$CTDB_VARDIR/state/my-pnn"
- if [ ! -f "$_pnn_file" ] ; then
- ctdb pnn | sed -e 's@.*:@@' >"$_pnn_file"
- fi
+ _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
- read pnn <"$_pnn_file"
+ cat "$_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 ()
+set_proc()
{
- echo "$2" >"/proc/$1"
+ echo "$2" >"/proc/$1"
}
-set_proc_maybe ()
+set_proc_maybe()
{
- if [ -w "/proc/$1" ] ; then
- set_proc "$1" "$2"
- fi
+ 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 ()
+get_proc()
{
- cat "/proc/$1"
+ cat "/proc/$1"
}
######################################################
# Print up to $_max kernel stack traces for processes named $_program
-program_stack_traces ()
+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
+ _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 $service_name is set
-assert_service_name ()
+assert_service_name()
{
- [ -n "$service_name" ] || die "INTERNAL ERROR: \$service_name not set"
+ # service_name is set by the event script
+ # shellcheck disable=SC2154
+ [ -n "$service_name" ] || die "INTERNAL ERROR: \$service_name not set"
}
######################################################
######################################################
ctdb_check_directories_probe()
{
- while IFS="" read d ; do
- case "$d" in
- *%*)
- continue
- ;;
- *)
- [ -d "${d}/." ] || return 1
- esac
- done
+ while IFS="" read -r d; do
+ case "$d" in
+ *%*)
+ continue
+ ;;
+ *)
+ [ -d "${d}/." ] || return 1
+ ;;
+ esac
+ done
}
######################################################
######################################################
ctdb_check_directories()
{
- ctdb_check_directories_probe || {
- echo "ERROR: $service_name directory \"$d\" not available"
- exit 1
- }
+ ctdb_check_directories_probe || {
+ echo "ERROR: $service_name directory \"$d\" not available"
+ exit 1
+ }
}
######################################################
# usage: ctdb_check_tcp_ports <ports...>
######################################################
-# This flag file is created when a service is initially started. It
-# is deleted the first time TCP port checks for that service succeed.
-# Until then ctdb_check_tcp_ports() prints a more subtle "error"
-# message if a port check fails.
-_ctdb_check_tcp_common ()
-{
- assert_service_name
- _ctdb_service_started_file="$ctdb_fail_dir/$service_name.started"
-}
-
-ctdb_check_tcp_init ()
-{
- _ctdb_check_tcp_common
- mkdir -p "${_ctdb_service_started_file%/*}" # dirname
- touch "$_ctdb_service_started_file"
-}
-
# 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 "$_ret" in
- 0)
- _ctdb_check_tcp_common
- if [ ! -f "$_ctdb_service_started_file" ] ; then
- echo "ERROR: $service_name tcp port $_p is not responding"
- debug "\"ctdb checktcpport $_p\" was able to bind to port"
- else
- echo "INFO: $service_name tcp port $_p is not responding"
- fi
+ if [ -z "$1" ]; then
+ echo "INTERNAL ERROR: ctdb_check_tcp_ports - no ports specified"
+ exit 1
+ fi
- return 1
- ;;
- 98)
- # Couldn't bind, something already listening, next port...
- continue
- ;;
- *)
- echo "ERROR: unexpected error running \"ctdb checktcpport\""
- debug <<EOF
-ctdb checktcpport (exited with $_ret) with output:
-$_out"
-EOF
- return $_ret
- esac
- done
+ for _p; do # process each function argument (port)
+ _cmd="$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 $_ret
+ ;;
+ esac
+ done
- # All ports listening
- _ctdb_check_tcp_common
- rm -f "$_ctdb_service_started_file"
- return 0
+ # All ports listening
+ return 0
}
######################################################
# check a unix socket
-# usage: ctdb_check_unix_socket SERVICE_NAME <socket_path>
+# usage: ctdb_check_unix_socket SOCKPATH
######################################################
-ctdb_check_unix_socket() {
- socket_path="$1"
- [ -z "$socket_path" ] && return
-
- if ! netstat --unix -a -n | grep -q "^unix.*LISTEN.*${socket_path}$"; then
- echo "ERROR: $service_name socket $socket_path not found"
- return 1
- fi
-}
-
-######################################################
-# check a command returns zero status
-# usage: ctdb_check_command <command>
-######################################################
-ctdb_check_command ()
+ctdb_check_unix_socket()
{
- _out=$("$@" 2>&1) || {
- echo "ERROR: $* returned error"
- echo "$_out" | debug
- exit 1
- }
+ _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 ()
+kill_tcp_connections()
{
- _ip="$1"
-
- _oneway=false
- if [ "$2" = "oneway" ] ; then
- _oneway=true
- fi
+ _iface="$1"
+ _ip="$2"
- get_tcp_connections_for_ip "$_ip" | {
- _killcount=0
- _connections=""
- _nl="
-"
- while read _dst _src; do
- _destport="${_dst##*:}"
- __oneway=$_oneway
- case $_destport in
- # we only do one-way killtcp for CIFS
- 139|445) __oneway=true ;;
- esac
-
- echo "Killing TCP connection $_src $_dst"
- _connections="${_connections}${_nl}${_src} ${_dst}"
- if ! $__oneway ; then
- _connections="${_connections}${_nl}${_dst} ${_src}"
- fi
-
- _killcount=$(($_killcount + 1))
- done
-
- if [ $_killcount -eq 0 ] ; then
- return
+ _oneway=false
+ if [ "$3" = "oneway" ]; then
+ _oneway=true
fi
- echo "$_connections" | ctdb killtcp || {
- echo "Failed to send killtcp control"
- return
- }
+ 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 [ $_killcount -eq 0 ]; then
+ return
+ fi
- _count=0
- while : ; do
- _remaining=$(get_tcp_connections_for_ip $_ip | wc -l)
+ if [ -n "$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
- if [ $_remaining -eq 0 ] ; then
- echo "Killed $_killcount TCP connections to released IP $_ip"
- return
- fi
+ _actually_killed=$((_killcount - _remaining))
- _count=$(($_count + 1))
- if [ $_count -gt 3 ] ; then
- echo "Timed out killing tcp connections for IP $_ip ($_remaining remaining)"
- return
- fi
+ _t="${_actually_killed}/${_killcount}"
+ echo "Killed ${_t} TCP connections to released IP $_ip"
- echo "Waiting for $_remaining connections to be killed for IP $_ip"
- sleep 1
- done
- }
+ if [ -n "$_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_local_only()
{
- kill_tcp_connections "$1" "oneway"
+ kill_tcp_connections "$@" "oneway"
}
##################################################################
# tickle any TCP connections with the given IP
##################################################################
-tickle_tcp_connections ()
+tickle_tcp_connections()
{
- _ip="$1"
-
- get_tcp_connections_for_ip "$_ip" |
- {
- _failed=false
+ _ip="$1"
- while read dest src; do
- echo "Tickle TCP connection $src $dest"
- ctdb tickle $src $dest >/dev/null 2>&1 || _failed=true
- echo "Tickle TCP connection $dest $src"
- ctdb tickle $dest $src >/dev/null 2>&1 || _failed=true
- done
+ # Get connections, both directions
+ _conns=$(get_tcp_connections_for_ip "$_ip" |
+ awk '{ print $1, $2 ; print $2, $1 }')
- if $_failed ; then
- echo "Failed to send tickle control"
- fi
- }
+ echo "$_conns" | awk '{ print "Tickle TCP connection", $1, $2 }'
+ echo "$_conns" | ctdb tickle
}
-get_tcp_connections_for_ip ()
+get_tcp_connections_for_ip()
{
- _ip="$1"
+ _ip="$1"
- netstat -tn | awk -v ip=$_ip \
- 'index($1, "tcp") == 1 && \
- (index($4, ip ":") == 1 || index($4, "::ffff:" ip ":") == 1) \
- && $6 == "ESTABLISHED" \
- {print $4" "$5}'
+ ss -tn state established "src [$_ip]" | awk 'NR > 1 {print $3, $4}'
}
########################################################
-add_ip_to_iface ()
+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
-
- 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
+ _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
- # 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 $_iface"
- return 1
- ;;
- *tentative*|*dadfailed*)
+ # Intentionally unquoted multi-word value here
+ # shellcheck disable=SC2086
+ ip addr add "$_ip/$_maskbits" $_bcast dev "$_iface" || {
echo "Failed to add $_ip/$_maskbits on dev $_iface"
- ip addr del "$_ip/$_maskbits" dev "$_iface"
return 1
- ;;
- esac
- fi
+ }
+
+ # 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
- }
+ _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 ()
+ip_maskbits_iface()
{
- _addr="$1"
-
- case "$_addr" in
- *:*) _family="inet6" ; _bits=128 ;;
- *) _family="inet" ; _bits=32 ;;
- esac
-
- ip addr show to "${_addr}/${_bits}" 2>/dev/null | \
- awk -v family="${_family}" \
- 'NR == 1 { iface = $2; sub(":$", "", iface) ; \
- sub("@.*", "", iface) } \
- $1 ~ /inet/ { mask = $2; sub(".*/", "", mask); \
- print mask, iface, family }'
+ _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 = $2; sub(".*/", "", mask);
+ print mask, iface }'
}
-drop_ip ()
+drop_ip()
{
- _addr="${1%/*}" # Remove optional maskbits
-
- 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 $_maskbits >/dev/null 2>&1
- fi
+ _addr="${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 ()
+drop_all_public_ips()
{
- while read _ip _x ; do
- drop_ip "$_ip"
- done <"${CTDB_PUBLIC_ADDRESSES:-/dev/null}"
+ # _x is intentionally ignored
+ # shellcheck disable=SC2034
+ while read -r _ip _x; do
+ case "$_ip" in
+ \#*) continue ;;
+ esac
+ drop_ip "$_ip"
+ done <"${CTDB_BASE}/public_addresses"
}
-flush_route_cache ()
+flush_route_cache()
{
- set_proc_maybe sys/net/ipv4/route/flush 1
- set_proc_maybe sys/net/ipv6/route/flush 1
+ set_proc_maybe sys/net/ipv4/route/flush 1
+ set_proc_maybe sys/net/ipv6/route/flush 1
}
########################################################
-# Simple counters
-_ctdb_counter_common () {
- _service_name="${1:-${service_name:-${script_name}}}"
- _counter_file="$ctdb_fail_dir/$_service_name"
- mkdir -p "${_counter_file%/*}" # dirname
-}
-ctdb_counter_init () {
- _ctdb_counter_common "$1"
+# Interface monitoring
- >"$_counter_file"
-}
-ctdb_counter_incr () {
- _ctdb_counter_common "$1"
+# If the interface is a virtual one (e.g. VLAN) then get the
+# underlying interface
+interface_get_real()
+{
+ _iface="$1"
- # unary counting!
- echo -n 1 >> "$_counter_file"
-}
-ctdb_counter_get () {
- _ctdb_counter_common "$1"
- # unary counting!
- stat -c "%s" "$_counter_file" 2>/dev/null || echo 0
+ # If $_iface is a VLAN (i.e. contains an '@') then strip every
+ # before the '@', otherwise print the whole interface
+ echo "${_iface##*@}"
}
-ctdb_check_counter () {
- _msg="${1:-error}" # "error" - anything else is silent on fail
- _op="${2:--ge}" # an integer operator supported by test
- _limit="${3:-${service_fail_limit}}"
- shift 3
-
- _size=$(ctdb_counter_get "$1")
-
- _hit=false
- if [ "$_op" != "%" ] ; then
- if [ $_size $_op $_limit ] ; then
- _hit=true
- fi
- else
- if [ $(($_size $_op $_limit)) -eq 0 ] ; then
- _hit=true
- fi
- fi
- if $_hit ; then
- if [ "$_msg" = "error" ] ; then
- echo "ERROR: $_size consecutive failures for $_service_name, marking node unhealthy"
- exit 1
+
+# 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 ${_realiface}"
+ return 1
+ }
+ }
+
+ return 0
else
- return 1
+ # Not a bond
+ case "$_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
- fi
}
########################################################
+# Simple counters
+_ctdb_counter_common()
+{
+ [ $# -le 1 ] || die "usage: _ctdb_counter_common [name]"
-ctdb_status_dir="$CTDB_VARDIR/state/service_status"
-ctdb_fail_dir="$CTDB_VARDIR/state/failcount"
+ if [ $# -eq 1 ]; then
+ _counter_name="${1}.failcount"
+ else
+ _counter_name="failcount"
+ fi
-ctdb_setup_service_state_dir ()
+ if [ -z "$script_state_dir" ]; then
+ die "ctdb_counter_* functions need ctdb_setup_state_dir()"
+ fi
+
+ _counter_file="${script_state_dir}/${_counter_name}"
+}
+# Some code passes an argument
+# shellcheck disable=SC2120
+ctdb_counter_init()
{
- service_state_dir="$CTDB_VARDIR/state/service_state/${1:-${service_name}}"
- mkdir -p "$service_state_dir" || {
- echo "Error creating state dir \"$service_state_dir\""
- exit 1
- }
+ _ctdb_counter_common "$1"
+
+ : >"$_counter_file"
}
+ctdb_counter_incr()
+{
+ _ctdb_counter_common "$1"
-########################################################
-# Managed status history, for auto-start/stop
+ # unary counting using newlines!
+ echo >>"$_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 $_val
+}
-ctdb_managed_dir="$CTDB_VARDIR/state/managed_history"
+#
+# Fail counter/threshold combination to control warnings and node unhealthy
+#
-_ctdb_managed_common ()
+_failcount_validate_threshold()
{
- _ctdb_managed_file="$ctdb_managed_dir/$service_name"
+ 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
}
-ctdb_service_managed ()
+_failcount_common()
{
- _ctdb_managed_common
- mkdir -p "$ctdb_managed_dir"
- touch "$_ctdb_managed_file"
+ _thing="$1"
+
+ _counter=$(echo "$_thing" | sed -e 's@/@_SLASH_@g' -e 's@ @_@g')
}
-ctdb_service_unmanaged ()
+failcount_init()
{
- _ctdb_managed_common
- rm -f "$_ctdb_managed_file"
+ _thing="$1"
+
+ _failcount_common "$_thing"
+
+ ctdb_counter_init "$_counter"
}
-is_ctdb_previously_managed_service ()
+failcount_reset()
{
- _ctdb_managed_common
- [ -f "$_ctdb_managed_file" ]
-}
+ _thing="$1"
-########################################################
-# Check and set status
+ _failcount_common "$_thing"
-log_status_cat ()
-{
- echo "node is \"$1\", \"${script_name}\" reports problem: $(cat $2)"
+ _failcount=$(ctdb_counter_get "$_counter")
+ if [ "$_failcount" -eq 0 ]; then
+ return
+ fi
+
+ printf 'NOTICE: %s: no longer failing\n' "$_thing"
+ ctdb_counter_init "$_counter"
}
-ctdb_checkstatus ()
+failcount_incr()
{
- if [ -r "$ctdb_status_dir/$script_name/unhealthy" ] ; then
- log_status_cat "unhealthy" "$ctdb_status_dir/$script_name/unhealthy"
- return 1
- elif [ -r "$ctdb_status_dir/$script_name/banned" ] ; then
- log_status_cat "banned" "$ctdb_status_dir/$script_name/banned"
- return 2
- else
- return 0
- fi
+ _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 "$_output"
+ fi
}
-ctdb_setstatus ()
+########################################################
+
+# ctdb_setup_state_dir <type> <name>
+# Sets/creates script_state_dir)
+ctdb_setup_state_dir()
{
- d="$ctdb_status_dir/$script_name"
- case "$1" in
- unhealthy|banned)
- mkdir -p "$d"
- cat "$2" >"$d/$1"
- ;;
- *)
- for i in "banned" "unhealthy" ; do
- rm -f "$d/$i"
- done
- ;;
- esac
+ [ $# -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 ()
+_ctdb_service_reconfigure_common()
{
- _d="$ctdb_status_dir/${service_name}"
- mkdir -p "$_d"
- _ctdb_service_reconfigure_flag="$_d/reconfigure"
-}
+ if [ -z "$script_state_dir" ]; then
+ die "ctdb_service_*_reconfigure() needs ctdb_setup_state_dir()"
+ fi
-ctdb_service_needs_reconfigure ()
-{
- _ctdb_service_reconfigure_common
- [ -e "$_ctdb_service_reconfigure_flag" ]
+ _ctdb_service_reconfigure_flag="${script_state_dir}/need_reconfigure"
}
-ctdb_service_set_reconfigure ()
+ctdb_service_needs_reconfigure()
{
- _ctdb_service_reconfigure_common
- >"$_ctdb_service_reconfigure_flag"
+ _ctdb_service_reconfigure_common
+ [ -e "$_ctdb_service_reconfigure_flag" ]
}
-ctdb_service_unset_reconfigure ()
+ctdb_service_set_reconfigure()
{
- _ctdb_service_reconfigure_common
- rm -f "$_ctdb_service_reconfigure_flag"
+ _ctdb_service_reconfigure_common
+ : >"$_ctdb_service_reconfigure_flag"
}
-ctdb_service_reconfigure ()
+ctdb_service_unset_reconfigure()
{
- echo "Reconfiguring service \"${service_name}\"..."
- ctdb_service_unset_reconfigure
- service_reconfigure || return $?
- ctdb_counter_init
+ _ctdb_service_reconfigure_common
+ rm -f "$_ctdb_service_reconfigure_flag"
}
-# Default service_reconfigure() function does nothing.
-service_reconfigure ()
+ctdb_service_reconfigure()
{
- :
+ echo "Reconfiguring service \"${service_name}\"..."
+ ctdb_service_unset_reconfigure
+ service_reconfigure || return $?
+ # Intentionally have this use $service_name as default
+ # shellcheck disable=SC2119
+ ctdb_counter_init
}
-ctdb_reconfigure_take_lock ()
+# Default service_reconfigure() function does nothing.
+service_reconfigure()
{
- _ctdb_service_reconfigure_common
- _lock="${_d}/reconfigure_lock"
- mkdir -p "${_lock%/*}" # dirname
- touch "$_lock"
-
- (
- flock 0
- # This is overkill but will work if we need to extend this to
- # allow certain events to run multiple times in parallel
- # (e.g. takeip) and write multiple PIDs to the file.
- read _locker_event
- if [ -n "$_locker_event" ] ; then
- while read _pid ; do
- if [ -n "$_pid" -a "$_pid" != $$ ] && \
- kill -0 "$_pid" 2>/dev/null ; then
- exit 1
- fi
- done
- fi
-
- printf "%s\n%s\n" "$event_name" $$ >"$_lock"
- exit 0
- ) <"$_lock"
+ :
}
-ctdb_reconfigure_release_lock ()
-{
- _ctdb_service_reconfigure_common
- _lock="${_d}/reconfigure_lock"
-
- rm -f "$_lock"
-}
+# Default service_start() and service_stop() functions.
-ctdb_replay_monitor_status ()
+# These may be overridden in an eventscript.
+service_start()
{
- echo "Replaying previous status for this script due to reconfigure..."
- # Leading separator ('|') is missing in some versions...
- _out=$(ctdb scriptstatus -X | grep -E "^\|?monitor\|${script_name}\|")
- # Output looks like this:
- # |monitor|60.nfs|1|ERROR|1314764004.030861|1314764004.035514|foo bar|
- # This is the cheapest way of getting fields in the middle.
- set -- $(IFS="|" ; echo $_out)
- _code="$3"
- _status="$4"
- # The error output field can include colons so we'll try to
- # preserve them. The weak checking at the beginning tries to make
- # this work for both broken (no leading '|') and fixed output.
- _out="${_out%|}"
- _err_out="${_out#*monitor|${script_name}|*|*|*|*|}"
- case "$_status" in
- OK) : ;; # Do nothing special.
- TIMEDOUT)
- # Recast this as an error, since we can't exit with the
- # correct negative number.
- _code=1
- _err_out="[Replay of TIMEDOUT scriptstatus - note incorrect return code.] ${_err_out}"
- ;;
- DISABLED)
- # Recast this as an OK, since we can't exit with the
- # correct negative number.
- _code=0
- _err_out="[Replay of DISABLED scriptstatus - note incorrect return code.] ${_err_out}"
- ;;
- *) : ;; # Must be ERROR, do nothing special.
- esac
- if [ -n "$_err_out" ] ; then
- echo "$_err_out"
- fi
- exit $_code
+ service "$service_name" start
}
-ctdb_service_check_reconfigure ()
+service_stop()
{
- assert_service_name
-
- # We only care about some events in this function. For others we
- # return now.
- case "$event_name" in
- monitor|ipreallocated|reconfigure) : ;;
- *) return 0 ;;
- esac
-
- if ctdb_reconfigure_take_lock ; then
- # No events covered by this function are running, so proceed
- # with gay abandon.
- case "$event_name" in
- reconfigure)
- (ctdb_service_reconfigure)
- exit $?
- ;;
- ipreallocated)
- if ctdb_service_needs_reconfigure ; then
- ctdb_service_reconfigure
- fi
- ;;
- esac
-
- ctdb_reconfigure_release_lock
- else
- # Somebody else is running an event we don't want to collide
- # with. We proceed with caution.
- case "$event_name" in
- reconfigure)
- # Tell whoever called us to retry.
- exit 2
- ;;
- ipreallocated)
- # Defer any scheduled reconfigure and just run the
- # rest of the ipreallocated event, as per the
- # eventscript. There's an assumption here that the
- # event doesn't depend on any scheduled reconfigure.
- # This is true in the current code.
- return 0
- ;;
- monitor)
- # There is most likely a reconfigure in progress so
- # the service is possibly unstable. As above, we
- # defer any scheduled reconfigured. We also replay
- # the previous monitor status since that's the best
- # information we have.
- ctdb_replay_monitor_status
- ;;
- esac
- fi
+ service "$service_name" stop
}
##################################################################
-# Does CTDB manage this service? - and associated auto-start/stop
-ctdb_compat_managed_service ()
+# This exists only for backward compatibility with 3rd party scripts
+# that call it
+ctdb_standard_event_handler()
{
- if [ "$1" = "yes" -a "$2" = "$service_name" ] ; then
- CTDB_MANAGED_SERVICES="$CTDB_MANAGED_SERVICES $2"
- fi
+ :
}
-is_ctdb_managed_service ()
+iptables_wrapper()
{
- assert_service_name
-
- # $t is used just for readability and to allow better accurate
- # matching via leading/trailing spaces
- t=" $CTDB_MANAGED_SERVICES "
+ _family="$1"
+ shift
+ if [ "$_family" = "inet6" ]; then
+ _iptables_cmd="ip6tables"
+ else
+ _iptables_cmd="iptables"
+ fi
- # Return 0 if "<space>$service_name<space>" appears in $t
- if [ "${t#* ${service_name} }" != "${t}" ] ; then
- return 0
- fi
-
- # If above didn't match then update $CTDB_MANAGED_SERVICES for
- # backward compatibility and try again.
- ctdb_compat_managed_service "$CTDB_MANAGES_VSFTPD" "vsftpd"
- ctdb_compat_managed_service "$CTDB_MANAGES_SAMBA" "samba"
- ctdb_compat_managed_service "$CTDB_MANAGES_WINBIND" "winbind"
- ctdb_compat_managed_service "$CTDB_MANAGES_HTTPD" "apache2"
- ctdb_compat_managed_service "$CTDB_MANAGES_HTTPD" "httpd"
- ctdb_compat_managed_service "$CTDB_MANAGES_ISCSI" "iscsi"
- ctdb_compat_managed_service "$CTDB_MANAGES_CLAMD" "clamd"
- ctdb_compat_managed_service "$CTDB_MANAGES_NFS" "nfs"
-
- t=" $CTDB_MANAGED_SERVICES "
-
- # Return 0 if "<space>$service_name<space>" appears in $t
- [ "${t#* ${service_name} }" != "${t}" ]
+ # iptables doesn't like being re-entered, so flock-wrap it.
+ flock -w 30 "${CTDB_SCRIPT_VARDIR}/iptables.flock" "$_iptables_cmd" "$@"
}
-ctdb_start_stop_service ()
-{
- assert_service_name
-
- # Allow service-start/service-stop pseudo-events to start/stop
- # services when we're not auto-starting/stopping and we're not
- # monitoring.
- case "$event_name" in
- service-start)
- if is_ctdb_managed_service ; then
- die 'service-start event not permitted when service is managed'
- fi
- if [ "$CTDB_SERVICE_AUTOSTARTSTOP" = "yes" ] ; then
- die 'service-start event not permitted with $CTDB_SERVICE_AUTOSTARTSTOP = yes'
- fi
- ctdb_service_start
- exit $?
- ;;
- service-stop)
- if is_ctdb_managed_service ; then
- die 'service-stop event not permitted when service is managed'
- fi
- if [ "$CTDB_SERVICE_AUTOSTARTSTOP" = "yes" ] ; then
- die 'service-stop event not permitted with $CTDB_SERVICE_AUTOSTARTSTOP = yes'
- fi
- ctdb_service_stop
- exit $?
- ;;
- esac
-
- # Do nothing unless configured to...
- [ "$CTDB_SERVICE_AUTOSTARTSTOP" = "yes" ] || return 0
-
- [ "$event_name" = "monitor" ] || return 0
-
- if is_ctdb_managed_service ; then
- if ! is_ctdb_previously_managed_service ; then
- echo "Starting service \"$service_name\" - now managed"
- background_with_logging ctdb_service_start
- exit $?
- fi
- else
- if is_ctdb_previously_managed_service ; then
- echo "Stopping service \"$service_name\" - no longer managed"
- background_with_logging ctdb_service_stop
- exit $?
- fi
- fi
-}
+# 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
-ctdb_service_start ()
+######################################################################
+# NFS callout handling
+
+nfs_callout_init()
{
- # The service is marked managed if we've ever tried to start it.
- ctdb_service_managed
+ _state_dir="$1"
- service_start || return $?
+ if [ -z "$CTDB_NFS_CALLOUT" ]; then
+ CTDB_NFS_CALLOUT="${CTDB_BASE}/nfs-linux-kernel-callout"
+ fi
+ # Always export, for statd callout
+ export CTDB_NFS_CALLOUT
- ctdb_counter_init
- ctdb_check_tcp_init
-}
+ # If the callout wants to use this then it must create it
+ export CTDB_NFS_CALLOUT_STATE_DIR="${_state_dir}/callout-state"
-ctdb_service_stop ()
-{
- ctdb_service_unmanaged
- service_stop
-}
+ # 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
-# Default service_start() and service_stop() functions.
-
-# These may be overridden in an eventscript.
-service_start ()
-{
- service "$service_name" start
+ nfs_callout_cache="${_state_dir}/nfs_callout_cache"
+ nfs_callout_cache_callout="${nfs_callout_cache}/CTDB_NFS_CALLOUT"
+ nfs_callout_cache_ops="${nfs_callout_cache}/ops"
}
-service_stop ()
+nfs_callout_register()
{
- service "$service_name" stop
-}
+ mkdir -p "$nfs_callout_cache_ops"
+ rm -f "$nfs_callout_cache_ops"/*
-##################################################################
+ echo "$CTDB_NFS_CALLOUT" >"$nfs_callout_cache_callout"
-ctdb_standard_event_handler ()
-{
- case "$1" in
- status)
- ctdb_checkstatus
- exit
- ;;
- setstatus)
- shift
- ctdb_setstatus "$@"
- exit
- ;;
- esac
+ _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
}
-iptables_wrapper ()
+nfs_callout()
{
- _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 "${CTDB_VARDIR}/iptables-ctdb.flock" "$_iptables_cmd" "$@"
-}
+ # 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
-# AIX (and perhaps others?) doesn't have mktemp
-if ! type mktemp >/dev/null 2>&1 ; then
- mktemp ()
- {
- _dir=false
- if [ "$1" = "-d" ] ; then
- _dir=true
- shift
+ # Run the operation if it is registered...
+ if [ -e "${nfs_callout_cache_ops}/${1}" ] ||
+ [ -e "${nfs_callout_cache_ops}/ALL" ]; then
+ "$CTDB_NFS_CALLOUT" "$@"
fi
- _d="${TMPDIR:-/tmp}"
- _hex10=$(dd if=/dev/urandom count=20 2>/dev/null | \
- md5sum | \
- sed -e 's@\(..........\).*@\1@')
- _t="${_d}/tmp.${_hex10}"
- (
- umask 077
- if $_dir ; then
- mkdir "$_t"
- else
- >"$_t"
- fi
- )
- echo "$_t"
- }
-fi
+}
########################################################
# tickle handling
########################################################
-update_tickles ()
+update_tickles()
{
_port="$1"
- tickledir="$CTDB_VARDIR/state/tickles"
+ tickledir="${CTDB_SCRIPT_VARDIR}/tickles"
mkdir -p "$tickledir"
- ctdb_get_pnn
-
# What public IPs do I hold?
- _ips=$(ctdb -X ip | awk -F'|' -v pnn=$pnn '$3 == pnn {print $2}')
-
- # IPs as a regexp choice
- _ipschoice="($(echo $_ips | sed -e 's/ /|/g' -e 's/\./\\\\./g'))"
+ _pnn=$(ctdb_get_pnn)
+ _ips=$($CTDB -X ip | awk -F'|' -v pnn="$_pnn" '$3 == pnn {print $2}')
- # Record connections to our public IPs in a temporary file
- _my_connections="${tickledir}/${_port}.connections"
- rm -f "$_my_connections"
- netstat -tn |
- awk -v destpat="^${_ipschoice}:${_port}\$" \
- '$1 == "tcp" && $6 == "ESTABLISHED" && $4 ~ destpat {print $5, $4}' |
- sort >"$_my_connections"
+ # 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"
- rm -f "$_my_tickles"
- for _i in $_ips ; do
- ctdb -X gettickles $_i $_port |
- awk -F'|' 'NR > 1 { printf "%s:%s %s:%s\n", $2, $3, $4, $5 }'
+ _my_tickles="${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"
+ sort >"$_my_tickles"
# Add tickles for connections that we haven't already got tickles for
comm -23 "$_my_connections" "$_my_tickles" |
- while read _src _dst ; do
- ctdb addtickle $_src $_dst
- done
+ $CTDB addtickle
# Remove tickles for connections that are no longer there
comm -13 "$_my_connections" "$_my_tickles" |
- while read _src _dst ; do
- ctdb deltickle $_src $_dst
- done
+ $CTDB deltickle
+
+ rm -f "$_my_connections" "$_my_tickles"
- rm -f "$_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
########################################################
-[ -n "$CTDB_RC_LOCAL" -a -x "$CTDB_RC_LOCAL" ] && {
- . "$CTDB_RC_LOCAL"
-}
-
-[ -x $CTDB_BASE/rc.local ] && {
- . $CTDB_BASE/rc.local
+[ -x "${CTDB_BASE}/rc.local" ] && {
+ . "${CTDB_BASE}/rc.local"
}
-[ -d $CTDB_BASE/rc.local.d ] && {
- for i in $CTDB_BASE/rc.local.d/* ; do
+[ -d "${CTDB_BASE}/rc.local.d" ] && {
+ for i in "${CTDB_BASE}/rc.local.d"/*; do
[ -x "$i" ] && . "$i"
done
}
-script_name="${0##*/}" # basename
-service_fail_limit=1
-event_name="$1"
+script_name="${0##*/}" # basename
git.samba.org / gd / samba-autobuild / .git / blobdiff