path: root/heartbeat/CTDB.in

#!@BASH_SHELL@
#
#             OCF Resource Agent for managing CTDB
#
# Copyright (c) 2009-2010 Novell Inc., Tim Serong
#                    All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like.  Any license provided herein, whether implied or
# otherwise, applies only to this software file.  Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
#
#
# OVERVIEW
#
# When run by itself, CTDB can handle IP failover and includes scripts
# to manage various services (Samba, Winbind, HTTP, etc.).  When run as
# a resource in a Pacemaker cluster, this additional functionality
# should not be used; instead one should define separate resources for
# CTDB, Samba, Winbind, IP addresses, etc.
#
# As of 2010-11-17, there is no separate OCF Samba or Winbind RA, so
# it is still possible to configure CTDB so that it manages these
# resources itself.  In future, once Samba and Winbind RAs are
# available, this ability will be deprecated and ultimately removed.
#
# This RA intentionally provides no ability to configure CTDB such that
# it manages IP failover, HTTP, NFS, etc.
#
#
# TODO:
# - ctdb_stop doesn't really support multiple independent CTDB instances,
#   unless they're running from distinct ctdbd binaries (it uses pkill
#   $OCF_RESKEY_ctdbd_binary if "ctdb stop" doesn't work, which it might
#   not under heavy load - this will kill all ctdbd instances on the
#   system).  OTOH, running multiple CTDB instances per node is, well,
#   AFAIK, completely crazy.  Can't run more than one in a vanilla CTDB
#   cluster, with the CTDB init script.  So it might be nice to address
#   this for complete semantic correctness of the RA, but shouldn't
#   actually cause any trouble in real life.
# - As much as possible, get rid of auto config generation
#   - Especially smb.conf
# - Verify timeouts are sane
# - Monitor differentiate between error and not running?
# - Do we need to verify globally unique setting?
# - Should set CTDB_NODES to ${HA_RSCTMP}/ctdb (generated based on
#   current nodes)
# - Look at enabling set_ctdb_variables() if necessary.
# - Probably possible for sysconfig file to not be restored if
#   CTDB dies unexpectedly.
#
#######################################################################
# Initialization:

: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs

#######################################################################
# Default parameter values:

# Some distro's ctdb package stores the persistent db in /var/lib/ctdb,
# others store in /var/ctdb. This attempts to detect the correct default
# directory.
var_prefix="/var/lib/ctdb"
if [ ! -d "$var_prefix" ] && [ -d "/var/ctdb" ]; then
	var_prefix="/var/ctdb"
fi

run_prefix="/run"
if [ ! -d "$var_prefix" ] && [ -d "/var/run" ]; then
	var_prefix="/var/run"
fi

# Parameter defaults

OCF_RESKEY_ctdb_recovery_lock_default=""
OCF_RESKEY_ctdb_manages_samba_default="no"
OCF_RESKEY_ctdb_manages_winbind_default="no"
OCF_RESKEY_ctdb_service_smb_default=""
OCF_RESKEY_ctdb_service_nmb_default=""
OCF_RESKEY_ctdb_service_winbind_default=""
OCF_RESKEY_ctdb_samba_skip_share_check_default="yes"
OCF_RESKEY_ctdb_monitor_free_memory_default="100"
OCF_RESKEY_ctdb_start_as_disabled_default="no"

: ${OCF_RESKEY_ctdb_recovery_lock=${OCF_RESKEY_ctdb_recovery_lock_default}}
: ${OCF_RESKEY_ctdb_manages_samba=${OCF_RESKEY_ctdb_manages_samba_default}}
: ${OCF_RESKEY_ctdb_manages_winbind=${OCF_RESKEY_ctdb_manages_winbind_default}}
: ${OCF_RESKEY_ctdb_service_smb=${OCF_RESKEY_ctdb_service_smb_default}}
: ${OCF_RESKEY_ctdb_service_nmb=${OCF_RESKEY_ctdb_service_nmb_default}}
: ${OCF_RESKEY_ctdb_service_winbind=${OCF_RESKEY_ctdb_service_winbind_default}}
: ${OCF_RESKEY_ctdb_samba_skip_share_check=${OCF_RESKEY_ctdb_samba_skip_share_check_default}}
: ${OCF_RESKEY_ctdb_monitor_free_memory=${OCF_RESKEY_ctdb_monitor_free_memory_default}}
: ${OCF_RESKEY_ctdb_start_as_disabled=${OCF_RESKEY_ctdb_start_as_disabled_default}}

OCF_RESKEY_ctdb_config_dir_default="/etc/ctdb"
OCF_RESKEY_ctdb_binary_default="/usr/bin/ctdb"
OCF_RESKEY_ctdbd_binary_default="/usr/sbin/ctdbd"
OCF_RESKEY_ctdb_dbdir_default="${var_prefix}"
OCF_RESKEY_ctdb_logfile_default="/var/log/ctdb/log.ctdb"
OCF_RESKEY_ctdb_rundir_default="${run_prefix}/ctdb"
OCF_RESKEY_ctdb_timeout_default="10"

: ${OCF_RESKEY_ctdb_config_dir=${OCF_RESKEY_ctdb_config_dir_default}}
: ${OCF_RESKEY_ctdb_binary=${OCF_RESKEY_ctdb_binary_default}}
: ${OCF_RESKEY_ctdbd_binary=${OCF_RESKEY_ctdbd_binary_default}}
: ${OCF_RESKEY_ctdb_dbdir=${OCF_RESKEY_ctdb_dbdir_default}}
: ${OCF_RESKEY_ctdb_logfile=${OCF_RESKEY_ctdb_logfile_default}}
: ${OCF_RESKEY_ctdb_rundir=${OCF_RESKEY_ctdb_rundir_default}}
: ${OCF_RESKEY_ctdb_timeout=${OCF_RESKEY_ctdb_timeout_default}}

OCF_RESKEY_ctdb_socket_default="${OCF_RESKEY_ctdb_rundir}/ctdbd.socket"
OCF_RESKEY_ctdb_debuglevel_default="2"
OCF_RESKEY_ctdb_max_open_files_default=""

: ${OCF_RESKEY_ctdb_socket=${OCF_RESKEY_ctdb_socket_default}}
: ${OCF_RESKEY_ctdb_debuglevel=${OCF_RESKEY_ctdb_debuglevel_default}}
: ${OCF_RESKEY_ctdb_max_open_files=${OCF_RESKEY_ctdb_max_open_files_default}}

OCF_RESKEY_smb_conf_default="/etc/samba/smb.conf"
OCF_RESKEY_smb_private_dir_default=""
OCF_RESKEY_smb_passdb_backend_default="tdbsam"
OCF_RESKEY_smb_idmap_backend_default="tdb2"
OCF_RESKEY_smb_fileid_algorithm_default=""

: ${OCF_RESKEY_smb_conf=${OCF_RESKEY_smb_conf_default}}
: ${OCF_RESKEY_smb_private_dir=${OCF_RESKEY_smb_private_dir_default}}
: ${OCF_RESKEY_smb_passdb_backend=${OCF_RESKEY_smb_passdb_backend_default}}
: ${OCF_RESKEY_smb_idmap_backend=${OCF_RESKEY_smb_idmap_backend_default}}
: ${OCF_RESKEY_smb_fileid_algorithm=${OCF_RESKEY_smb_fileid_algorithm_default}}

#######################################################################

ctdb_version() {
	$OCF_RESKEY_ctdb_binary version | awk '{print $NF}' | sed "s/[-\.]\?[[:alpha:]].*//"
}

meta_data() {
	cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="CTDB" version="1.0">
<version>1.0</version>

<longdesc lang="en">
This resource agent manages CTDB, allowing one to use Clustered Samba in a
Linux-HA/Pacemaker cluster.  You need a shared filesystem (e.g. OCFS2 or GFS2) on
which the CTDB lock will be stored.  Create /etc/ctdb/nodes containing a list
of private IP addresses of each node in the cluster, then configure this RA
as a clone.  This agent expects the samba and windbind resources
to be managed outside of CTDB's control as a separate set of resources controlled
by the cluster manager.  The optional support for enabling CTDB management of these
daemons will be depreciated.

For more information see http://linux-ha.org/wiki/CTDB_(resource_agent)
</longdesc>
<shortdesc lang="en">CTDB Resource Agent</shortdesc>

<parameters>

<parameter name="ctdb_recovery_lock" unique="1" required="1">
<longdesc lang="en">
The location of a shared lock file or helper binary, common across all nodes.
See CTDB documentation for details.
</longdesc>
<shortdesc lang="en">CTDB shared lock file</shortdesc>
<content type="string" default="${OCF_RESKEY_ctdb_recovery_lock_default}" />
</parameter>

<parameter name="ctdb_manages_samba" unique="0" required="0">
<longdesc lang="en">
Should CTDB manage starting/stopping the Samba service for you?
This will be deprecated in future, in favor of configuring a
separate Samba resource.
</longdesc>
<shortdesc lang="en">Should CTDB manage Samba?</shortdesc>
<content type="boolean" default="${OCF_RESKEY_ctdb_manages_samba_default}" />
</parameter>

<parameter name="ctdb_manages_winbind" unique="0" required="0">
<longdesc lang="en">
Should CTDB manage starting/stopping the Winbind service for you?
This will be deprecated in future, in favor of configuring a
separate Winbind resource.
</longdesc>
<shortdesc lang="en">Should CTDB manage Winbind?</shortdesc>
<content type="boolean" default="${OCF_RESKEY_ctdb_manages_winbind_default}" />
</parameter>

<parameter name="ctdb_service_smb" unique="0" required="0">
<longdesc lang="en">
Name of smb init script.  Only necessary if CTDB is managing
Samba directly.  Will usually be auto-detected.
</longdesc>
<shortdesc lang="en">Name of smb init script</shortdesc>
<content type="string" default="${OCF_RESKEY_ctdb_service_smb_default}" />
</parameter>

<parameter name="ctdb_service_nmb" unique="0" required="0">
<longdesc lang="en">
Name of nmb init script.  Only necessary if CTDB is managing
Samba directly.  Will usually be auto-detected.
</longdesc>
<shortdesc lang="en">Name of nmb init script</shortdesc>
<content type="string" default="${OCF_RESKEY_ctdb_service_nmb_default}" />
</parameter>

<parameter name="ctdb_service_winbind" unique="0" required="0">
<longdesc lang="en">
Name of winbind init script.  Only necessary if CTDB is managing
Winbind directly.  Will usually be auto-detected.
</longdesc>
<shortdesc lang="en">Name of winbind init script</shortdesc>
<content type="string" default="${OCF_RESKEY_ctdb_service_winbind_default}" />
</parameter>

<parameter name="ctdb_samba_skip_share_check" unique="0" required="0">
<longdesc lang="en">
If there are very many shares it may not be feasible to check that all
of them are available during each monitoring interval.  In that case
this check can be disabled.
</longdesc>
<shortdesc lang="en">Skip share check during monitor?</shortdesc>
<content type="boolean" default="${OCF_RESKEY_ctdb_samba_skip_share_check_default}" />
</parameter>

<parameter name="ctdb_monitor_free_memory" unique="0" required="0">
<longdesc lang="en">
If the amount of free memory drops below this value the node will
become unhealthy and ctdb and all managed services will be shutdown.
Once this occurs, the administrator needs to find the reason for the
OOM situation, rectify it and restart ctdb with "service ctdb start".
With CTDB 4.4.0 and later this parameter is ignored.
</longdesc>
<shortdesc lang="en">Minimum amount of free memory (MB)</shortdesc>
<content type="integer" default="${OCF_RESKEY_ctdb_monitor_free_memory_default}" />
</parameter>

<parameter name="ctdb_start_as_disabled" unique="0" required="0">
<longdesc lang="en">
When set to yes, the CTDB node will start in DISABLED mode and not
host any public ip addresses.
</longdesc>
<shortdesc lang="en">Start CTDB disabled?</shortdesc>
<content type="boolean" default="${OCF_RESKEY_ctdb_start_as_disabled_default}" />
</parameter>

<parameter name="ctdb_config_dir" unique="0" required="0">
<longdesc lang="en">
The directory containing various CTDB configuration files.
The "nodes" and "notify.sh" scripts are expected to be
in this directory.
</longdesc>
<shortdesc lang="en">CTDB config file directory</shortdesc>
<content type="string" default="${OCF_RESKEY_ctdb_config_dir_default}" />
</parameter>

<parameter name="ctdb_binary" unique="0" required="0">
<longdesc lang="en">
Full path to the CTDB binary.
</longdesc>
<shortdesc lang="en">CTDB binary path</shortdesc>
<content type="string" default="${OCF_RESKEY_ctdb_binary_default}" />
</parameter>

<parameter name="ctdbd_binary" unique="0" required="0">
<longdesc lang="en">
Full path to the CTDB cluster daemon binary.
</longdesc>
<shortdesc lang="en">CTDB Daemon binary path</shortdesc>
<content type="string" default="${OCF_RESKEY_ctdbd_binary_default}" />
</parameter>

<parameter name="ctdb_socket" unique="1" required="0">
<longdesc lang="en">
Full path to the domain socket that ctdbd will create, used for
local clients to attach and communicate with the ctdb daemon.
With CTDB 4.9.0 and later the socket path is hardcoded at build
time, so this parameter is ignored.
</longdesc>
<shortdesc lang="en">CTDB socket location (ignored with CTDB 4.9+)</shortdesc>
<content type="string" default="${OCF_RESKEY_ctdb_socket_default}" />
</parameter>

<parameter name="ctdb_dbdir" unique="1" required="0">
<longdesc lang="en">
The directory to put the local CTDB database files in.
Persistent database files will be put in ctdb_dbdir/persistent.
</longdesc>
<shortdesc lang="en">CTDB database directory</shortdesc>
<content type="string" default="${OCF_RESKEY_ctdb_dbdir_default}" />
</parameter>

<parameter name="ctdb_logfile" unique="0" required="0">
<longdesc lang="en">
Full path to log file. To log to syslog instead, use the
value "syslog".
</longdesc>
<shortdesc lang="en">CTDB log file location</shortdesc>
<content type="string" default="${OCF_RESKEY_ctdb_logfile_default}" />
</parameter>

<parameter name="ctdb_rundir" unique="0" required="0">
<longdesc lang="en">
Full path to ctdb runtime directory, used for storage of socket
lock state.
</longdesc>
<shortdesc lang="en">CTDB runtime directory location</shortdesc>
<content type="string" default="${OCF_RESKEY_ctdb_rundir_default}" />
</parameter>

<parameter name="ctdb_timeout" unique="1" required="0">
<longdesc lang="en">
Indicates that ctdb should wait up to TIMEOUT seconds for a response to most commands sent to the CTDB daemon.
</longdesc>
<shortdesc lang="en">CTDB timeout in seconds</shortdesc>
<content type="integer" default="${OCF_RESKEY_ctdb_timeout_default}" />
</parameter>

<parameter name="ctdb_debuglevel" unique="0" required="0">
<longdesc lang="en">
What debug level to run at (0-10). Higher means more verbose.
</longdesc>
<shortdesc lang="en">CTDB debug level</shortdesc>
<content type="integer" default="${OCF_RESKEY_ctdb_debuglevel_default}" />
</parameter>

<parameter name="ctdb_max_open_files" required="0">
<longdesc lang="en">
Maximum number of open files (for ulimit -n)
</longdesc>
<shortdesc lang="en">Max open files</shortdesc>
<content type="integer" default="${OCF_RESKEY_ctdb_max_open_files_default}" />
</parameter>

<parameter name="smb_conf" unique="0" required="0">
<longdesc lang="en">
Path to default samba config file.  Only necessary if CTDB
is managing Samba.
</longdesc>
<shortdesc lang="en">Path to smb.conf</shortdesc>
<content type="string" default="${OCF_RESKEY_smb_conf_default}" />
</parameter>

<parameter name="smb_private_dir" unique="1" required="0">
<longdesc lang="en">
The directory for smbd to use for storing such files as
smbpasswd and secrets.tdb.  Old versions of CTBD (prior to 1.0.50)
required this to be on shared storage.  This parameter should not
be set for current versions of CTDB, and only remains in the RA
for backwards compatibility.
</longdesc>
<shortdesc lang="en">Samba private dir (deprecated)</shortdesc>
<content type="string" default="${OCF_RESKEY_smb_private_dir_default}" />
</parameter>

<parameter name="smb_passdb_backend" unique="0" required="0">
<longdesc lang="en">
Which backend to use for storing user and possibly group
information.  Only necessary if CTDB is managing Samba.
</longdesc>
<shortdesc lang="en">Samba passdb backend</shortdesc>
<content type="string" default="${OCF_RESKEY_smb_passdb_backend_default}" />
</parameter>

<parameter name="smb_idmap_backend" unique="0" required="0">
<longdesc lang="en">
Which backend to use for SID/uid/gid mapping.  Only necessary
if CTDB is managing Samba.
</longdesc>
<shortdesc lang="en">Samba idmap backend</shortdesc>
<content type="string" default="${OCF_RESKEY_smb_idmap_backend_default}" />
</parameter>

<parameter name="smb_fileid_algorithm" unique="0" required="0">
<longdesc lang="en">
Which fileid:algorithm to use with vfs_fileid.  The correct
value depends on which clustered filesystem is in use, e.g.:
for OCFS2, this should be set to "fsid".  Only necessary if
CTDB is managing Samba.
</longdesc>
<shortdesc lang="en">Samba VFS fileid algorithm</shortdesc>
<content type="string" default="${OCF_RESKEY_smb_fileid_algorithm_default}" />
</parameter>

</parameters>

<actions>
<action name="start"        timeout="90s" />
<action name="stop"         timeout="100s" />
<action name="monitor"      timeout="20s" interval="10s" depth="0" />
<action name="meta-data"    timeout="5s" />
<action name="validate-all"   timeout="30s" />
</actions>
</resource-agent>
END
}

#######################################################################

# Figure out path to /etc/sysconfig/ctdb (same logic as
# loadconfig() from /etc/ctdb/functions
if [ -f /etc/sysconfig/ctdb ]; then
	CTDB_SYSCONFIG=/etc/sysconfig/ctdb
elif [ -f /etc/default/ctdb ]; then
	CTDB_SYSCONFIG=/etc/default/ctdb
elif [ -f "$OCF_RESKEY_ctdb_config_dir/ctdb" ]; then
	CTDB_SYSCONFIG=$OCF_RESKEY_ctdb_config_dir/ctdb
elif [ -f "$OCF_RESKEY_ctdb_config_dir/ctdbd.conf" ]; then
	CTDB_SYSCONFIG=$OCF_RESKEY_ctdb_config_dir/ctdbd.conf
fi

# Backup paths
CTDB_SYSCONFIG_BACKUP=${CTDB_SYSCONFIG}.ctdb-ra-orig

invoke_ctdb() {
	# CTDB's defaults are:
	local timelimit
	timelimit=120
	# ...but we override with the timeout for the current op:
	if [ -n "$OCF_RESKEY_CRM_meta_timeout" ]; then
		timelimit=$((OCF_RESKEY_CRM_meta_timeout/1000))
	fi

	local vers=$(ctdb_version)
	ocf_version_cmp "$vers" "4.9.0"

	# if version < 4.9.0 specify '--socket' otherwise it's
	# a compiled option
	if [ "$?" -eq "0" ]; then
		$OCF_RESKEY_ctdb_binary --socket="$OCF_RESKEY_ctdb_socket" \
			-t ${OCF_RESKEY_ctdb_timeout} -T $timelimit \
			"$@"
	else
		$OCF_RESKEY_ctdb_binary \
			-t ${OCF_RESKEY_ctdb_timeout} -T $timelimit \
			"$@"
	fi
}

# Enable any event scripts that are explicitly required.
# Any others will ultimately be invoked or not based on how they ship
# with CTDB, but will generally have no effect, beacuase the relevant
# CTDB_MANAGES_* options won't be set in /etc/sysconfig/ctdb.
enable_event_scripts_chmod() {
	local event_dir
	event_dir=$OCF_RESKEY_ctdb_config_dir/events.d

	chmod u+x "$event_dir/00.ctdb"	# core database health check

	if [ -f "${OCF_RESKEY_ctdb_config_dir}/public_addresses" ]; then
		chmod u+x "$event_dir/10.interface"
	else
		chmod a-x "$event_dir/10.interface"
	fi
	if [ -f "${OCF_RESKEY_ctdb_config_dir}/static-routes" ]; then
		chmod u+x "$event_dir/11.routing"
	else
		chmod a-x "$event_dir/11.routing"
	fi
	if ocf_is_true "$OCF_RESKEY_ctdb_manages_samba" || \
	   ocf_is_true "$OCF_RESKEY_ctdb_manages_winbind"; then
		chmod u+x "$event_dir/50.samba"
	else
		chmod a-x "$event_dir/50.samba"
	fi
}

enable_event_scripts_symlink() {
	# event scripts are symlinked once enabled, with the link source in...
	mkdir -p "$OCF_RESKEY_ctdb_config_dir/events/legacy" 2>/dev/null

	invoke_ctdb event script enable legacy 00.ctdb

	if [ -f "${OCF_RESKEY_ctdb_config_dir}/public_addresses" ]; then
		invoke_ctdb event script enable legacy 10.interface
	else
		invoke_ctdb event script disable legacy 10.interface
	fi
	if [ -f "${OCF_RESKEY_ctdb_config_dir}/static-routes" ]; then
		invoke_ctdb event script enable legacy 11.routing
	else
		invoke_ctdb event script disable legacy 11.routing
	fi

	if ocf_is_true "$OCF_RESKEY_ctdb_manages_winbind"; then
		invoke_ctdb event script enable legacy 49.winbind
	else
		invoke_ctdb event script disable legacy 49.winbind
	fi

	if ocf_is_true "$OCF_RESKEY_ctdb_manages_samba"; then
		invoke_ctdb event script enable legacy 50.samba
	else
		invoke_ctdb event script disable legacy 50.samba
	fi
}

# This function has no effect (currently no way to set CTDB_SET_*)
# but remains here in case we need it in future.
set_ctdb_variables() {
	rv=$OCF_SUCCESS
	set | grep ^CTDB_SET_ | cut -d_ -f3- |
	while read v; do
		varname=$(echo "$v" | cut -d= -f1)
		value=$(echo "$v" | cut -d= -f2)
		invoke_ctdb setvar "$varname" "$value" || rv=$OCF_ERR_GENERIC
	done || rv=$OCF_ERR_GENERIC
	return $rv
}


# Add necessary settings to /etc/samba/smb.conf.  In a perfect world,
# we'd be able to generate a new, temporary, smb.conf file somewhere,
# something like:
#     include = /etc/samba/smb.conf
#     [global]
#       clustering = yes
#       # ...etc...
# Unfortunately, we can't do this, because there's no way to tell the
# smb init script where the temporary config is, so we just edit
# the default config file.
init_smb_conf() {
	# Don't screw around with the config if CTDB isn't managing Samba!
	ocf_is_true "$OCF_RESKEY_ctdb_manages_samba" || return 0

	# replace these things in smb.conf
	local repl
	repl='# CTDB-RA:|passdb backend|clustering|idmap backend|idmap config[[:space:]]*\*[[:space:]]*:[[:space:]]*backend|private dir|ctdbd socket'

	local private_dir
	[ -n "$OCF_RESKEY_smb_private_dir" ] && private_dir="\tprivate dir = $OCF_RESKEY_smb_private_dir\n"

	local vfs_fileid
	local do_vfs
	do_vfs=0
	if  [ -n "$OCF_RESKEY_smb_fileid_algorithm" ]; then
		repl="${repl}|fileid:algorithm|fileid:mapping"
		vfs_fileid="\tfileid:algorithm = $OCF_RESKEY_smb_fileid_algorithm\n"
		if sed -n '/^[[:space:]]*\[global\]/,/^[[:space:]]*\[/p' $OCF_RESKEY_smb_conf | \
		   grep -Eq '^[[:space:]]*vfs objects'; then
			# vfs objects already specified, will append fileid to existing line
			do_vfs=1
		else
			vfs_fileid="$vfs_fileid\tvfs objects = fileid\n"
		fi
	fi
	# Preserve permissions of smb.conf
	local idmap_config
	if grep -Eqs '^[[:space:]]*idmap backend[[:space:]]*=' $OCF_RESKEY_smb_conf; then
		idmap_config=old
	else
		idmap_config=new
	fi
	cp -a "$OCF_RESKEY_smb_conf" "$OCF_RESKEY_smb_conf.$$"
	awk '
		/^[[:space:]]*\[/ { global = 0 }
		/^[[:space:]]*\[global\]/ { global = 1 }
		{
			if(global) {
				if ('$do_vfs' && $0 ~ /^[[:space:]]vfs objects/ && $0 !~ /fileid/) {
					print $0" fileid"
				} else if ($0 !~ /^[[:space:]]*('"$repl"')/) {
					print
				}
			} else {
				print
			}
		}' "$OCF_RESKEY_smb_conf" | sed "/^[[:space:]]*\[global\]/ a\\
\t# CTDB-RA: Begin auto-generated section (do not change below)\n\
\tpassdb backend = $OCF_RESKEY_smb_passdb_backend\n\
\tclustering = yes\n\
\tctdbd socket = $OCF_RESKEY_ctdb_socket\n$private_dir$vfs_fileid\
\t# CTDB-RA: End auto-generated section (do not change above)" > "$OCF_RESKEY_smb_conf.$$"
	if [ "$idmap_config" = "old" ]; then
		sed -i "/^[[:space:]]*clustering = yes/ a\\
\tidmap backend = $OCF_RESKEY_smb_idmap_backend" $OCF_RESKEY_smb_conf.$$
	else
		sed -i "/^[[:space:]]*clustering = yes/ a\\
\tidmap config * : backend = $OCF_RESKEY_smb_idmap_backend" $OCF_RESKEY_smb_conf.$$
	fi
	dd conv=notrunc,fsync of="$OCF_RESKEY_smb_conf.$$" if=/dev/null >/dev/null 2>&1
	mv "$OCF_RESKEY_smb_conf.$$" "$OCF_RESKEY_smb_conf"
}


# Get rid of that section we added
cleanup_smb_conf() {
	ocf_is_true "$OCF_RESKEY_ctdb_manages_samba" || return 0

	# preserve permissions of smb.conf
	cp -a "$OCF_RESKEY_smb_conf" "$OCF_RESKEY_smb_conf.$$"
	sed '/# CTDB-RA: Begin/,/# CTDB-RA: End/d' "$OCF_RESKEY_smb_conf" > "$OCF_RESKEY_smb_conf.$$"
	mv "$OCF_RESKEY_smb_conf.$$" "$OCF_RESKEY_smb_conf"
}

append_conf() {
	local file_path="$1"
	shift
	[ -n "$2" ] && echo "$1=$2" >> "$file_path"
}

generate_ctdb_config() {
	local ctdb_config="$OCF_RESKEY_ctdb_config_dir/ctdb.conf"

	# Backup existing config if we're not already using an auto-generated one
	grep -qa '# CTDB-RA: Auto-generated' $ctdb_config || cp -p $ctdb_config ${ctdb_config}.ctdb-ra-orig
	if [ $? -ne 0 ]; then
		ocf_log warn "Unable to backup $ctdb_config to ${ctdb_config}.ctdb-ra-orig"
	fi

	local log_option="file:$OCF_RESKEY_ctdb_logfile"
	if [ "$OCF_RESKEY_ctdb_logfile" = "syslog" ]; then
		log_option="syslog"
	fi

	local start_as_disabled="false"
	ocf_is_true "$OCF_RESKEY_ctdb_start_as_disabled" && start_as_disabled="true"

	local dbdir_volatile="$OCF_RESKEY_ctdb_dbdir/volatile"
	[ -d "$dbdir_volatile" ] || mkdir -p "$dbdir_volatile" 2>/dev/null
	local dbdir_persistent="$OCF_RESKEY_ctdb_dbdir/persistent"
	[ -d "$dbdir_persistent" ] || mkdir -p "$dbdir_persistent" 2>/dev/null
	local dbdir_state="$OCF_RESKEY_ctdb_dbdir/state"
	[ -d "$dbdir_state" ] || mkdir -p "$dbdir_state" 2>/dev/null

cat >$ctdb_config <<EOF
# CTDB-RA: Auto-generated
[logging]
	location = $log_option
	log level = $OCF_RESKEY_ctdb_debuglevel
[cluster]
	recovery lock = $OCF_RESKEY_ctdb_recovery_lock
[database]
	volatile database directory = $dbdir_volatile
	persistent database directory = $dbdir_persistent
	state database directory = $dbdir_state
[legacy]
	start as disabled = $start_as_disabled
EOF
}

generate_event_script_options() {
	local script_options="$OCF_RESKEY_ctdb_config_dir/script.options"

	# Backup existing config if we're not already using an auto-generated one
	grep -qa '# CTDB-RA: Auto-generated' $script_options || cp -p $script_options ${script_options}.ctdb-ra-orig
	if [ $? -ne 0 ]; then
		ocf_log warn "Unable to backup $script_options to ${script_options}.ctdb-ra-orig"
	fi

cat >$script_options <<EOF
# CTDB-RA: Auto-generated
CTDB_SAMBA_SKIP_SHARE_CHECK=$(ocf_is_true "$OCF_RESKEY_ctdb_samba_skip_share_check" && echo 'yes' || echo 'no')
EOF

	append_conf "$script_options" CTDB_SERVICE_SMB $OCF_RESKEY_ctdb_service_smb
	append_conf "$script_options" CTDB_SERVICE_NMB $OCF_RESKEY_ctdb_service_nmb
	append_conf "$script_options" CTDB_SERVICE_WINBIND $OCF_RESKEY_ctdb_service_winbind
}

# Generate a new, minimal CTDB config file that's just enough
# to get CTDB running as configured by the RA parameters.
generate_ctdb_sysconfig() {
	# Backup existing sysconfig if we're not already using an auto-generated one
	grep -qa '# CTDB-RA: Auto-generated' $CTDB_SYSCONFIG || cp -p $CTDB_SYSCONFIG $CTDB_SYSCONFIG_BACKUP
	if [ $? -ne 0 ]; then
		ocf_log warn "Unable to backup $CTDB_SYSCONFIG to $CTDB_SYSCONFIG_BACKUP"
	fi

	ocf_log info "Generating new $CTDB_SYSCONFIG"

	# Note to maintainers and other random hackers:
	# Parameters may need to be set here, for CTDB event
	# scripts to pick up, or may need to be passed to ctdbd
	# when starting, or both.  Be careful.  The CTDB source
	# tree and manpages are your friends.  As a concrete
	# example, setting CTDB_START_AS_DISABLED here is
	# completely useless, as this is actually a command line
	# argument for ctdbd; it's not used anywhere else.

	cat >$CTDB_SYSCONFIG <<EOF
# CTDB-RA: Auto-generated by ${0}, backup is at $CTDB_SYSCONFIG_BACKUP
CTDB_MONITOR_FREE_MEMORY=$OCF_RESKEY_ctdb_monitor_free_memory
CTDB_SAMBA_SKIP_SHARE_CHECK=$(ocf_is_true "$OCF_RESKEY_ctdb_samba_skip_share_check" && echo 'yes' || echo 'no')
CTDB_MANAGES_SAMBA=$(ocf_is_true "$OCF_RESKEY_ctdb_manages_samba" && echo 'yes' || echo 'no')
CTDB_MANAGES_WINBIND=$(ocf_is_true "$OCF_RESKEY_ctdb_manages_winbind" && echo 'yes' || echo 'no')
EOF
	append_conf "$CTDB_SYSCONFIG" CTDB_SERVICE_SMB $OCF_RESKEY_ctdb_service_smb
	append_conf "$CTDB_SYSCONFIG" CTDB_SERVICE_NMB $OCF_RESKEY_ctdb_service_nmb
	append_conf "$CTDB_SYSCONFIG" CTDB_SERVICE_WINBIND $OCF_RESKEY_ctdb_service_winbind
}


invoke_ctdbd() {
	local vers="$1"

	ocf_move_to_root_cgroup_if_rt_enabled

	ocf_version_cmp "$vers" "4.9.0"
	if [ "$?" -ne "0" ]; then
		# With 4.9+, all ctdbd binary parameters are provided as
		# config settings
		$OCF_RESKEY_ctdbd_binary
		return
	fi

	# Use logfile by default, or syslog if asked for
	local log_option
	# --logging supported from v4.3.0 and --logfile / --syslog support
	# has been removed from newer versions
	ocf_version_cmp "$vers" "4.2.14"
	if [ "$?" -eq "2" ]; then
		log_option="--logging=file:$OCF_RESKEY_ctdb_logfile"
		if [ "$OCF_RESKEY_ctdb_logfile" = "syslog" ]; then
			log_option="--logging=syslog"
		fi
	else
		log_option="--logfile=$OCF_RESKEY_ctdb_logfile"
		if [ "$OCF_RESKEY_ctdb_logfile" = "syslog" ]; then
			log_option="--syslog"
		fi
	fi

	# public addresses file (should not be present, but need to set for correctness if it is)
	local pub_addr_option
	pub_addr_option=""
	[ -f "${OCF_RESKEY_ctdb_config_dir}/public_addresses" ] && \
		pub_addr_option="--public-addresses=${OCF_RESKEY_ctdb_config_dir}/public_addresses"
	# start as disabled
	local start_as_disabled
	start_as_disabled="--start-as-disabled"
	ocf_is_true "$OCF_RESKEY_ctdb_start_as_disabled" || start_as_disabled=""

	$OCF_RESKEY_ctdbd_binary \
		--reclock="$OCF_RESKEY_ctdb_recovery_lock" \
		--nlist="$OCF_RESKEY_ctdb_config_dir/nodes" \
		--socket="$OCF_RESKEY_ctdb_socket" \
		--dbdir="$OCF_RESKEY_ctdb_dbdir" \
		--dbdir-persistent="$OCF_RESKEY_ctdb_dbdir/persistent" \
		--event-script-dir="$OCF_RESKEY_ctdb_config_dir/events.d" \
		--notification-script="$OCF_RESKEY_ctdb_config_dir/notify.sh" \
		--transport=tcp \
		$start_as_disabled $log_option $pub_addr_option \
		-d "$OCF_RESKEY_ctdb_debuglevel"
}


ctdb_usage() {
	cat <<END
usage: $0 {start|stop|monitor|validate-all|meta-data}

Expects to have a fully populated OCF RA-compliant environment set.
END
}


ctdb_start() {
	# Do nothing if already running
	ctdb_monitor && return $OCF_SUCCESS

	# Make sure config is adequate
	ctdb_validate
	rv=$?
	[ $rv -ne 0 ] && return $rv

	# Add necessary configuration to smb.conf
	init_smb_conf
	if [ $? -ne 0 ]; then
		ocf_exit_reason "Failed to update $OCF_RESKEY_smb_conf."
		return $OCF_ERR_GENERIC
	fi

	local version=$(ctdb_version)

	ocf_version_cmp "$version" "4.9.0"
	if [ "$?" -eq "0" ]; then
		# prior to 4.9, ctdbd parameters are in sysconfig or passed as
		# binary arguments
		generate_ctdb_sysconfig

		# prior to 4.9, event script enablement without a running
		# ctdbd is done by chmoding the scripts directly
		enable_event_scripts_chmod
	else
		# 4.9+ moves all ctdbd parameters to ctdb.conf
		generate_ctdb_config

		# 4.9+ event script options are in script.options
		generate_event_script_options

		# 4.9+ event scripts can be enabled with ctdb directly, which
		# performs a symlink
		enable_event_scripts_symlink
	fi

	if [ ! -d "$(dirname $OCF_RESKEY_ctdb_logfile)" ]; then
		# ensure the logfile's directory exists, otherwise ctdb will fail to start
		mkdir -p $(dirname $OCF_RESKEY_ctdb_logfile)
	fi

	# ensure ctdb's rundir exists, otherwise it will fail to start
	mkdir -p $OCF_RESKEY_ctdb_rundir 2>/dev/null

	# set nofile ulimit for ctdbd process
	if [ -n "$OCF_RESKEY_ctdb_max_open_files" ]; then
		ulimit -n "$OCF_RESKEY_ctdb_max_open_files"
	fi

	# Start her up
	invoke_ctdbd "$version"

	if [ $? -ne 0 ]; then
		# cleanup smb.conf
		cleanup_smb_conf

		ocf_exit_reason "Failed to execute $OCF_RESKEY_ctdbd_binary."
		return $OCF_ERR_GENERIC
	else
		# Wait a bit for CTDB to stabilize
		# (until start times out if necessary)
		while true; do
			# Initial sleep is intentional (ctdb init script
			# has sleep after ctdbd start, but before invoking
			# ctdb to talk to it)
			sleep 1
			status=$(invoke_ctdb status 2>/dev/null)
			if [ $? -ne 0 ]; then
				# CTDB will be running, kill it before returning
				ctdb_stop
				ocf_exit_reason "Can't invoke $OCF_RESKEY_ctdb_binary status"
				return $OCF_ERR_GENERIC
			fi
			if ! echo "$status" | grep -qs 'UNHEALTHY (THIS'; then
				# Status does not say this node is unhealthy,
				# so we're good to go.  Do a bit of final
				# setup and (hopefully) return success.
				set_ctdb_variables
				return $?
			fi
		done
	fi

	# ctdbd will (or can) actually still be running at this point, so kill it
	ctdb_stop

	ocf_exit_reason "Timeout waiting for CTDB to stabilize"
	return $OCF_ERR_GENERIC
}


ctdb_stop() {
	# Do nothing if already stopped
	pkill -0 -f "$OCF_RESKEY_ctdbd_binary" || return $OCF_SUCCESS

	# Tell it to die nicely
	invoke_ctdb shutdown >/dev/null 2>&1
	rv=$?

	# No more Mr. Nice Guy
	count=0
	while pkill -0 -f "$OCF_RESKEY_ctdbd_binary" ; do
		sleep 1
		count=$((count + 1))
		[ $count -gt 10 ] && {
			ocf_log info "killing ctdbd "
			pkill -9 -f "$OCF_RESKEY_ctdbd_binary"
			pkill -9 -f "${OCF_RESKEY_ctdb_config_dir}/events"
		}
	done

	# Cleanup smb.conf
	cleanup_smb_conf

	# It was a clean shutdown, return success
	[ $rv -eq $OCF_SUCCESS ] && return $OCF_SUCCESS

	# Unclean shutdown, return success if there's no ctdbds left (we
	# killed them forcibly, but at least they're good and dead).
	pkill -0 -f "$OCF_RESKEY_ctdbd_binary" || return $OCF_SUCCESS

	# Problem: ctdb shutdown didn't work and neither did some vigorous
	# kill -9ing.  Only thing to do is report failure.
	return $OCF_ERR_GENERIC
}


ctdb_monitor() {
	local status
	# "ctdb status" exits non-zero if CTDB isn't running.
	# It can also exit non-zero if there's a timeout (ctdbd blocked,
	# stalled, massive load, or otherwise wedged).  If it's actually
	# not running, STDERR will say "Errno:Connection refused(111)",
	# whereas if it's wedged, it'll say various other unpleasant things.
	status=$(invoke_ctdb status 2>&1)
	if [ $? -ne 0 ]; then
		if echo "$status" | grep -qs 'Connection refused'; then
			return $OCF_NOT_RUNNING
		elif echo "$status" | grep -qs 'No such file or directory'; then
			return $OCF_NOT_RUNNING
		elif echo $status | grep -qs 'connect() failed'; then
			return $OCF_NOT_RUNNING
		else
			ocf_exit_reason "CTDB status call failed: $status"
			return $OCF_ERR_GENERIC
		fi
	fi
	if echo "$status" | grep -Eqs '(OK|DISABLED) \(THIS'; then
		return $OCF_SUCCESS
	fi

	ocf_exit_reason "CTDB status is bad: $status"
	return $OCF_ERR_GENERIC
}


ctdb_validate() {
	# Required binaries
	for binary in pkill; do
		check_binary $binary
	done

	if ocf_is_true "$OCF_RESKEY_ctdb_manages_samba" && [ ! -f "$OCF_RESKEY_smb_conf" ]; then
		ocf_exit_reason "Samba config file '$OCF_RESKEY_smb_conf' does not exist."
		return $OCF_ERR_INSTALLED
	fi

	if [ -f "${OCF_RESKEY_ctdb_config_dir}/public_addresses" ]; then
		ocf_log info "CTDB file '${OCF_RESKEY_ctdb_config_dir}/public_addresses' exists - CTDB will try to manage IP failover!"
	fi

	if [ ! -f "$OCF_RESKEY_ctdb_config_dir/nodes" ]; then
		ocf_exit_reason "$OCF_RESKEY_ctdb_config_dir/nodes does not exist."
		return $OCF_ERR_ARGS
	fi

	if [ -z "$OCF_RESKEY_ctdb_recovery_lock" ]; then
		ocf_exit_reason "ctdb_recovery_lock not specified."
		return $OCF_ERR_CONFIGURED
	fi

	if [ "${OCF_RESKEY_ctdb_recovery_lock:0:1}" == '!' ]; then
		# '!' prefix means recovery lock is handled via a helper binary
		binary="${OCF_RESKEY_ctdb_recovery_lock:1}"
		binary="${binary%% *}"	# trim any parameters
		if [ -z "$binary" ]; then
			ocf_exit_reason "ctdb_recovery_lock invalid helper"
			return $OCF_ERR_CONFIGURED
		fi
		check_binary "${binary}"
	else
		lock_dir=$(dirname "$OCF_RESKEY_ctdb_recovery_lock")
		touch "$lock_dir/$$" 2>/dev/null
		if [ $? != 0 ]; then
			ocf_exit_reason "Directory for lock file '$OCF_RESKEY_ctdb_recovery_lock' does not exist, or is not writable."
			return $OCF_ERR_ARGS
		fi
		rm "$lock_dir/$$"
	fi

	return $OCF_SUCCESS
}


case $__OCF_ACTION in
meta-data)	meta_data
		exit $OCF_SUCCESS
		;;
start)		ctdb_start;;
stop)		ctdb_stop;;
monitor)	ctdb_monitor;;
validate-all)	ctdb_validate;;
usage|help)	ctdb_usage
		exit $OCF_SUCCESS
		;;
*)		ctdb_usage
		exit $OCF_ERR_UNIMPLEMENTED
		;;
esac
rc=$?
ocf_log debug "${OCF_RESOURCE_INSTANCE} $__OCF_ACTION : $rc"
exit $rc