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#!/bin/sh
#
# Description: Manages a PostgreSQL Server as an OCF High-Availability
# resource
#
# Authors: Serge Dubrouski (sergeyfd@gmail.com) -- original RA
# Florian Haas (florian@linbit.com) -- makeover
# Takatoshi MATSUO (matsuo.tak@gmail.com) -- support replication
# David Corlette (dcorlette@netiq.com) -- add support for non-standard library locations and non-standard port
#
# Copyright: 2006-2012 Serge Dubrouski <sergeyfd@gmail.com>
# and other Linux-HA contributors
# License: GNU General Public License (GPL)
#
###############################################################################
# Initialization:
: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs
# Use runuser if available for SELinux.
if [ -x /sbin/runuser ]; then
SU=runuser
else
SU=su
fi
#
# Get PostgreSQL Configuration parameter
#
get_pgsql_param() {
local param_name
param_name=$1
perl_code="if (/^\s*$param_name[\s=]+\s*(.*)$/) {
\$dir=\$1;
\$dir =~ s/\s*\#.*//;
\$dir =~ s/^'(\S*)'/\$1/;
print \$dir;}"
perl -ne "$perl_code" < $OCF_RESKEY_config
}
# Defaults
OCF_RESKEY_pgctl_default=/usr/bin/pg_ctl
OCF_RESKEY_psql_default=/usr/bin/psql
OCF_RESKEY_pgdata_default=/var/lib/pgsql/data
OCF_RESKEY_pgdba_default=postgres
OCF_RESKEY_pghost_default=""
OCF_RESKEY_pgport_default=5432
OCF_RESKEY_pglibs_default=/usr/lib
OCF_RESKEY_start_opt_default=""
OCF_RESKEY_ctl_opt_default=""
OCF_RESKEY_pgdb_default=template1
OCF_RESKEY_logfile_default=/dev/null
OCF_RESKEY_stop_escalate_default=90
OCF_RESKEY_monitor_user_default=""
OCF_RESKEY_monitor_password_default=""
OCF_RESKEY_monitor_sql_default="select now();"
OCF_RESKEY_check_wal_receiver_default="false"
# Defaults for replication
OCF_RESKEY_rep_mode_default=none
OCF_RESKEY_node_list_default=""
OCF_RESKEY_restore_command_default=""
OCF_RESKEY_archive_cleanup_command_default=""
OCF_RESKEY_recovery_end_command_default=""
OCF_RESKEY_master_ip_default=""
OCF_RESKEY_repuser_default="postgres"
OCF_RESKEY_primary_conninfo_opt_default=""
OCF_RESKEY_restart_on_promote_default="false"
OCF_RESKEY_tmpdir_default="/var/lib/pgsql/tmp"
OCF_RESKEY_xlog_check_count_default="3"
OCF_RESKEY_crm_attr_timeout_default="5"
OCF_RESKEY_stop_escalate_in_slave_default=90
OCF_RESKEY_replication_slot_name_default=""
: ${OCF_RESKEY_pgctl=${OCF_RESKEY_pgctl_default}}
: ${OCF_RESKEY_psql=${OCF_RESKEY_psql_default}}
: ${OCF_RESKEY_pgdata=${OCF_RESKEY_pgdata_default}}
: ${OCF_RESKEY_pgdba=${OCF_RESKEY_pgdba_default}}
: ${OCF_RESKEY_pghost=${OCF_RESKEY_pghost_default}}
: ${OCF_RESKEY_pgport=${OCF_RESKEY_pgport_default}}
: ${OCF_RESKEY_pglibs=${OCF_RESKEY_pglibs_default}}
: ${OCF_RESKEY_config=${OCF_RESKEY_pgdata}/postgresql.conf}
: ${OCF_RESKEY_start_opt=${OCF_RESKEY_start_opt_default}}
: ${OCF_RESKEY_ctl_opt=${OCF_RESKEY_ctl_opt_default}}
: ${OCF_RESKEY_pgdb=${OCF_RESKEY_pgdb_default}}
: ${OCF_RESKEY_logfile=${OCF_RESKEY_logfile_default}}
: ${OCF_RESKEY_stop_escalate=${OCF_RESKEY_stop_escalate_default}}
: ${OCF_RESKEY_monitor_user=${OCF_RESKEY_monitor_user_default}}
: ${OCF_RESKEY_monitor_password=${OCF_RESKEY_monitor_password_default}}
: ${OCF_RESKEY_monitor_sql=${OCF_RESKEY_monitor_sql_default}}
: ${OCF_RESKEY_check_wal_receiver=${OCF_RESKEY_check_wal_receiver_default}}
# for replication
: ${OCF_RESKEY_rep_mode=${OCF_RESKEY_rep_mode_default}}
: ${OCF_RESKEY_node_list=${OCF_RESKEY_node_list_default}}
: ${OCF_RESKEY_restore_command=${OCF_RESKEY_restore_command_default}}
: ${OCF_RESKEY_archive_cleanup_command=${OCF_RESKEY_archive_cleanup_command_default}}
: ${OCF_RESKEY_recovery_end_command=${OCF_RESKEY_recovery_end_command_default}}
: ${OCF_RESKEY_master_ip=${OCF_RESKEY_master_ip_default}}
: ${OCF_RESKEY_repuser=${OCF_RESKEY_repuser_default}}
: ${OCF_RESKEY_primary_conninfo_opt=${OCF_RESKEY_primary_conninfo_opt_default}}
: ${OCF_RESKEY_restart_on_promote=${OCF_RESKEY_restart_on_promote_default}}
: ${OCF_RESKEY_tmpdir=${OCF_RESKEY_tmpdir_default}}
: ${OCF_RESKEY_xlog_check_count=${OCF_RESKEY_xlog_check_count_default}}
: ${OCF_RESKEY_crm_attr_timeout=${OCF_RESKEY_crm_attr_timeout_default}}
: ${OCF_RESKEY_stop_escalate_in_slave=${OCF_RESKEY_stop_escalate_in_slave_default}}
: ${OCF_RESKEY_replication_slot_name=${OCF_RESKEY_replication_slot_name_default}}
usage() {
cat <<EOF
usage: $0 start|stop|status|monitor|promote|demote|notify|meta-data|validate-all|methods
$0 manages a PostgreSQL Server as an HA resource.
The 'start' operation starts the PostgreSQL server.
The 'stop' operation stops the PostgreSQL server.
The 'status' operation reports whether the PostgreSQL is up.
The 'monitor' operation reports whether the PostgreSQL is running.
The 'promote' operation promotes the PostgreSQL server.
The 'demote' operation demotes the PostgreSQL server.
The 'validate-all' operation reports whether the parameters are valid.
The 'methods' operation reports on the methods $0 supports.
EOF
return $OCF_ERR_ARGS
}
meta_data() {
cat <<EOF
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="pgsql">
<version>1.0</version>
<longdesc lang="en">
Resource script for PostgreSQL. It manages a PostgreSQL as an HA resource.
</longdesc>
<shortdesc lang="en">Manages a PostgreSQL database instance</shortdesc>
<parameters>
<parameter name="pgctl" unique="0" required="0">
<longdesc lang="en">
Path to pg_ctl command.
</longdesc>
<shortdesc lang="en">pgctl</shortdesc>
<content type="string" default="${OCF_RESKEY_pgctl_default}" />
</parameter>
<parameter name="start_opt" unique="0" required="0">
<longdesc lang="en">
Start options (-o start_opt in pg_ctl). "-i -p 5432" for example.
</longdesc>
<shortdesc lang="en">start_opt</shortdesc>
<content type="string" default="${OCF_RESKEY_start_opt_default}" />
</parameter>
<parameter name="ctl_opt" unique="0" required="0">
<longdesc lang="en">
Additional pg_ctl options (-w, -W etc..).
</longdesc>
<shortdesc lang="en">ctl_opt</shortdesc>
<content type="string" default="${OCF_RESKEY_ctl_opt_default}" />
</parameter>
<parameter name="psql" unique="0" required="0">
<longdesc lang="en">
Path to psql command.
</longdesc>
<shortdesc lang="en">psql</shortdesc>
<content type="string" default="${OCF_RESKEY_psql_default}" />
</parameter>
<parameter name="pgdata" unique="0" required="0">
<longdesc lang="en">
Path to PostgreSQL data directory.
</longdesc>
<shortdesc lang="en">pgdata</shortdesc>
<content type="string" default="${OCF_RESKEY_pgdata_default}" />
</parameter>
<parameter name="pgdba" unique="0" required="0">
<longdesc lang="en">
User that owns PostgreSQL.
</longdesc>
<shortdesc lang="en">pgdba</shortdesc>
<content type="string" default="${OCF_RESKEY_pgdba_default}" />
</parameter>
<parameter name="pghost" unique="0" required="0">
<longdesc lang="en">
Hostname/IP address where PostgreSQL is listening
</longdesc>
<shortdesc lang="en">pghost</shortdesc>
<content type="string" default="${OCF_RESKEY_pghost_default}" />
</parameter>
<parameter name="pgport" unique="0" required="0">
<longdesc lang="en">
Port where PostgreSQL is listening
</longdesc>
<shortdesc lang="en">pgport</shortdesc>
<content type="integer" default="${OCF_RESKEY_pgport_default}" />
</parameter>
<parameter name="pglibs" unique="0" required="0">
<longdesc lang="en">
Custom location of the Postgres libraries. If not set, the standard location
will be used.
</longdesc>
<shortdesc lang="en">pglibs</shortdesc>
<content type="string" default="${OCF_RESKEY_pglibs_default}" />
</parameter>
<parameter name="monitor_user" unique="0" required="0">
<longdesc lang="en">
PostgreSQL user that pgsql RA will user for monitor operations. If it's not set
pgdba user will be used.
</longdesc>
<shortdesc lang="en">monitor_user</shortdesc>
<content type="string" default="${OCF_RESKEY_monitor_user_default}" />
</parameter>
<parameter name="monitor_password" unique="0" required="0">
<longdesc lang="en">
Password for monitor user.
</longdesc>
<shortdesc lang="en">monitor_password</shortdesc>
<content type="string" default="${OCF_RESKEY_monitor_password_default}" />
</parameter>
<parameter name="monitor_sql" unique="0" required="0">
<longdesc lang="en">
SQL script that will be used for monitor operations.
</longdesc>
<shortdesc lang="en">monitor_sql</shortdesc>
<content type="string" default="${OCF_RESKEY_monitor_sql_default}" />
</parameter>
<parameter name="config" unique="0" required="0">
<longdesc lang="en">
Path to the PostgreSQL configuration file for the instance.
</longdesc>
<shortdesc lang="en">Configuration file</shortdesc>
<content type="string" default="${OCF_RESKEY_pgdata}/postgresql.conf" />
</parameter>
<parameter name="pgdb" unique="0" required="0">
<longdesc lang="en">
Database that will be used for monitoring.
</longdesc>
<shortdesc lang="en">pgdb</shortdesc>
<content type="string" default="${OCF_RESKEY_pgdb_default}" />
</parameter>
<parameter name="logfile" unique="0" required="0">
<longdesc lang="en">
Path to PostgreSQL server log output file.
</longdesc>
<shortdesc lang="en">logfile</shortdesc>
<content type="string" default="${OCF_RESKEY_logfile_default}" />
</parameter>
<parameter name="socketdir" unique="0" required="0">
<longdesc lang="en">
Unix socket directory for PostgreSQL.
If you use PostgreSQL 9.3 or higher and define unix_socket_directories in the postgresql.conf, then you must set socketdir to determine which directory is used for psql command.
</longdesc>
<shortdesc lang="en">socketdir</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="stop_escalate" unique="0" required="0">
<longdesc lang="en">
Number of seconds to wait for stop (using -m fast) before resorting to -m immediate
</longdesc>
<shortdesc lang="en">stop escalation</shortdesc>
<content type="integer" default="${OCF_RESKEY_stop_escalate_default}" />
</parameter>
<parameter name="rep_mode" unique="0" required="0">
<longdesc lang="en">
Replication mode may be set to "async" or "sync" or "slave".
They require PostgreSQL 9.1 or later.
Once set, "async" and "sync" require node_list, master_ip, and
restore_command parameters,as well as configuring PostgreSQL
for replication (in postgresql.conf and pg_hba.conf).
"slave" means that RA only makes recovery.conf before starting
to connect to primary which is running somewhere.
It doesn't need master/slave setting.
It requires master_ip restore_command parameters.
</longdesc>
<shortdesc lang="en">rep_mode</shortdesc>
<content type="string" default="${OCF_RESKEY_rep_mode_default}" />
</parameter>
<parameter name="node_list" unique="0" required="0">
<longdesc lang="en">
All node names. Please separate each node name with a space.
This is optional for replication. Defaults to all nodes in the cluster
</longdesc>
<shortdesc lang="en">node list</shortdesc>
<content type="string" default="${OCF_RESKEY_node_list_default}" />
</parameter>
<parameter name="restore_command" unique="0" required="0">
<longdesc lang="en">
restore_command for recovery.conf.
This is required for replication.
</longdesc>
<shortdesc lang="en">restore_command</shortdesc>
<content type="string" default="${OCF_RESKEY_restore_command_default}" />
</parameter>
<parameter name="archive_cleanup_command" unique="0" required="0">
<longdesc lang="en">
archive_cleanup_command for recovery.conf.
This is used for replication and is optional.
</longdesc>
<shortdesc lang="en">archive_cleanup_command</shortdesc>
<content type="string" default="${OCF_RESKEY_archive_cleanup_command_default}" />
</parameter>
<parameter name="recovery_end_command" unique="0" required="0">
<longdesc lang="en">
recovery_end_command for recovery.conf.
This is used for replication and is optional.
</longdesc>
<shortdesc lang="en">recovery_end_command</shortdesc>
<content type="string" default="${OCF_RESKEY_recovery_end_command_default}" />
</parameter>
<parameter name="master_ip" unique="0" required="0">
<longdesc lang="en">
Master's floating IP address to be connected from hot standby.
This parameter is used for "primary_conninfo" in recovery.conf.
This is required for replication.
</longdesc>
<shortdesc lang="en">master ip</shortdesc>
<content type="string" default="${OCF_RESKEY_master_ip_default}" />
</parameter>
<parameter name="repuser" unique="0" required="0">
<longdesc lang="en">
User used to connect to the master server.
This parameter is used for "primary_conninfo" in recovery.conf.
This is required for replication.
</longdesc>
<shortdesc lang="en">repuser</shortdesc>
<content type="string" default="${OCF_RESKEY_repuser_default}" />
</parameter>
<parameter name="primary_conninfo_opt" unique="0" required="0">
<longdesc lang="en">
primary_conninfo options of recovery.conf except host, port, user and application_name.
This is optional for replication.
</longdesc>
<shortdesc lang="en">primary_conninfo_opt</shortdesc>
<content type="string" default="${OCF_RESKEY_primary_conninfo_opt_default}" />
</parameter>
<parameter name="restart_on_promote" unique="0" required="0">
<longdesc lang="en">
If this is true, RA deletes recovery.conf and restarts PostgreSQL
on promote to keep Timeline ID. It probably makes fail-over slower.
It's recommended to set on-fail of promote up as fence.
This is optional for replication.
</longdesc>
<shortdesc lang="en">restart_on_promote</shortdesc>
<content type="boolean" default="${OCF_RESKEY_restart_on_promote_default}" />
</parameter>
<parameter name="replication_slot_name" unique="0" required="0">
<longdesc lang="en">
Set this option when using replication slots.
Can only use lower case letters, numbers and underscore for replication_slot_name.
The replication slots would be created for each node, with the name adding the node name as postfix.
For example, replication_slot_name is "sample" and 2 slaves which are "node1" and "node2" connect to
their slots, the slots names are "sample_node1" and "sample_node2".
If the node name contains a upper case letter, hyphen and dot, those characters will be converted to a lower case letter or an underscore.
For example, Node-1.example.com to node_1_example_com.
pgsql RA doesn't monitor and delete the replication slot.
When the slave node has been disconnected in failure or the like, execute one of the following manually.
Otherwise it may eventually cause a disk full because the master node will continue to accumulate the unsent WAL.
1. recover and reconnect the slave node to the master node as soon as possible.
2. delete the slot on the master node by following psql command.
$ select pg_drop_replication_slot('replication_slot_name');
</longdesc>
<shortdesc lang="en">replication_slot_name</shortdesc>
<content type="string" default="${OCF_RESKEY_replication_slot_name_default}" />
</parameter>
<parameter name="tmpdir" unique="0" required="0">
<longdesc lang="en">
Path to temporary directory.
This is optional for replication.
</longdesc>
<shortdesc lang="en">tmpdir</shortdesc>
<content type="string" default="${OCF_RESKEY_tmpdir_default}" />
</parameter>
<parameter name="xlog_check_count" unique="0" required="0">
<longdesc lang="en">
Number of checks of xlog on monitor before promote.
This is optional for replication.
Note: For backward compatibility, the terms are unified with PostgreSQL 9.
If you are using PostgreSQL 10 or later, replace "xlog" with "wal".
Likewise, replacing "location" with "lsn".
</longdesc>
<shortdesc lang="en">xlog check count</shortdesc>
<content type="integer" default="${OCF_RESKEY_xlog_check_count_default}" />
</parameter>
<parameter name="crm_attr_timeout" unique="0" required="0">
<longdesc lang="en">
The timeout of crm_attribute forever update command.
Default value is 5 seconds.
This is optional for replication.
</longdesc>
<shortdesc lang="en">The timeout of crm_attribute forever update command.</shortdesc>
<content type="integer" default="${OCF_RESKEY_crm_attr_timeout_default}" />
</parameter>
<parameter name="stop_escalate_in_slave" unique="0" required="0">
<longdesc lang="en">
Number of seconds to wait for stop (using -m fast) before resorting to -m immediate
in slave state.
This is optional for replication.
</longdesc>
<shortdesc lang="en">stop escalation_in_slave</shortdesc>
<content type="integer" default="${OCF_RESKEY_stop_escalate_in_slave_default}" />
</parameter>
<parameter name="check_wal_receiver" unique="0" required="0">
<longdesc lang="en">
If this is true, RA checks wal_receiver process on monitor
and notifies its status using "(resource name)-receiver-status" attribute.
It's useful for checking whether PostgreSQL (hot standby) connects to primary.
The attribute shows status as "normal" or "normal (master)" or "ERROR".
Note that if you configure PostgreSQL as master/slave resource, then
wal receiver is not running in the master and the attribute shows status as
"normal (master)" consistently because it is normal status.
</longdesc>
<shortdesc lang="en">check_wal_receiver</shortdesc>
<content type="boolean" default="${OCF_RESKEY_check_wal_receiver_default}" />
</parameter>
</parameters>
<actions>
<action name="start" timeout="120s" />
<action name="stop" timeout="120s" />
<action name="status" timeout="60s" />
<action name="monitor" depth="0" timeout="30s" interval="30s"/>
<action name="monitor" depth="0" timeout="30s" interval="29s" role="Master" />
<action name="promote" timeout="120s" />
<action name="demote" timeout="120s" />
<action name="notify" timeout="90s" />
<action name="meta-data" timeout="5s" />
<action name="validate-all" timeout="5s" />
<action name="methods" timeout="5s" />
</actions>
</resource-agent>
EOF
}
#
# Run the given command in the Resource owner environment...
#
runasowner() {
local quietrun=""
local loglevel="-err"
local var
for var in 1 2
do
case "$1" in
"-q")
quietrun="-q"
shift 1;;
"warn"|"err")
loglevel="-$1"
shift 1;;
*)
;;
esac
done
ocf_run $quietrun $loglevel $SU $OCF_RESKEY_pgdba -c "cd $OCF_RESKEY_pgdata; $*"
}
#
# Shell escape
#
escape_string() {
echo "$*" | sed -e "s/'/'\\\\''/g"
}
#
# methods: What methods/operations do we support?
#
pgsql_methods() {
cat <<EOF
start
stop
status
monitor
promote
demote
notify
methods
meta-data
validate-all
EOF
}
# Execulte SQL and return the result.
exec_sql() {
local sql="$1"
local output
local rc
output=`$SU $OCF_RESKEY_pgdba -c "cd $OCF_RESKEY_pgdata; \
$OCF_RESKEY_psql $psql_options -U $OCF_RESKEY_pgdba \
-Atc \"$sql\""`
rc=$?
echo $output
return $rc
}
#pgsql_real_start: Starts PostgreSQL
pgsql_real_start() {
local pgctl_options
local postgres_options
local rc
if pgsql_status; then
ocf_log info "PostgreSQL is already running. PID=`cat $PIDFILE`"
if is_replication; then
return $OCF_ERR_GENERIC
else
return $OCF_SUCCESS
fi
fi
# Remove postmaster.pid if it exists
rm -f $PIDFILE
# Remove backup_label if it exists
if [ -f $BACKUPLABEL ] && ! is_replication; then
ocf_log info "Removing $BACKUPLABEL. The previous backup might have failed."
rm -f $BACKUPLABEL
fi
# Check if we need to create a log file
if ! check_log_file $OCF_RESKEY_logfile
then
ocf_exit_reason "PostgreSQL can't write to the log file: $OCF_RESKEY_logfile"
return $OCF_ERR_PERM
fi
# Check socket directory
if [ -n "$OCF_RESKEY_socketdir" ]
then
check_socket_dir
fi
check_stat_temp_directory
if [ "$OCF_RESKEY_rep_mode" = "slave" ]; then
rm -f $RECOVERY_CONF
make_recovery_conf || return $OCF_ERR_GENERIC
fi
# Set options passed to pg_ctl
pgctl_options="$OCF_RESKEY_ctl_opt -D $OCF_RESKEY_pgdata -l $OCF_RESKEY_logfile"
# Set options passed to the PostgreSQL server process
postgres_options="-c config_file=${OCF_RESKEY_config}"
if [ -n "$OCF_RESKEY_pghost" ]; then
postgres_options="$postgres_options -h $OCF_RESKEY_pghost"
fi
if [ -n "$OCF_RESKEY_start_opt" ]; then
postgres_options="$postgres_options $OCF_RESKEY_start_opt"
fi
# Tack pass-through options onto pg_ctl options
pgctl_options="$pgctl_options -o '$postgres_options'"
# Invoke pg_ctl
runasowner "unset PGUSER; unset PGPASSWORD; $OCF_RESKEY_pgctl $pgctl_options -W start"
if [ $? -eq 0 ]; then
# Probably started.....
ocf_log info "PostgreSQL start command sent."
else
ocf_exit_reason "Can't start PostgreSQL."
return $OCF_ERR_GENERIC
fi
while :
do
pgsql_real_monitor warn
rc=$?
if [ $rc -eq $OCF_SUCCESS -o $rc -eq $OCF_RUNNING_MASTER ]; then
break;
fi
sleep 1
ocf_log debug "PostgreSQL still hasn't started yet. Waiting..."
done
# delete replication slots on all nodes. On master node will be created during promotion.
if use_replication_slot; then
delete_replication_slots
if [ $? -eq $OCF_ERR_GENERIC ]; then
ocf_exit_reason "PostgreSQL can't clean up replication_slot."
return $OCF_ERR_GENERIC
fi
fi
ocf_log info "PostgreSQL is started."
return $rc
}
pgsql_replication_start() {
local rc
local synchronous_standby_names
# initializing for replication
change_pgsql_status "$NODENAME" "STOP"
delete_master_baseline
exec_with_retry 0 $CRM_MASTER -v $CAN_NOT_PROMOTE
rm -f ${XLOG_NOTE_FILE}.* $REP_MODE_CONF $RECOVERY_CONF
if ! make_recovery_conf || ! delete_xlog_location || ! set_async_mode_all; then
return $OCF_ERR_GENERIC
fi
if [ -f $PGSQL_LOCK ]; then
ocf_exit_reason "My data may be inconsistent. You have to remove $PGSQL_LOCK file to force start."
return $OCF_ERR_GENERIC
fi
# start
pgsql_real_start
if [ $? -ne $OCF_SUCCESS ]; then
return $OCF_ERR_GENERIC
fi
synchronous_standby_names=$(exec_sql "${CHECK_SYNCHRONOUS_STANDBY_NAMES_SQL}")
if [ -n "${synchronous_standby_names}" ]; then
ocf_exit_reason "Invalid synchronous_standby_names is set in postgresql.conf."
return $OCF_ERR_CONFIGURED
fi
change_pgsql_status "$NODENAME" "HS:alone"
return $OCF_SUCCESS
}
#pgsql_start: pgsql_real_start() wrapper for replication
pgsql_start() {
if ! is_replication; then
pgsql_real_start
return $?
else
pgsql_replication_start
return $?
fi
}
#pgsql_promote: Promote PostgreSQL
pgsql_promote() {
local output
local target
local rc
if ! is_replication; then
ocf_exit_reason "Not in a replication mode."
return $OCF_ERR_CONFIGURED
fi
output=`exec_sql "${CHECK_MS_SQL}"`
if [ $? -ne 0 ]; then
report_psql_error $rc $loglevel "Can't get PostgreSQL recovery status on promote."
return $OCF_ERR_GENERIC
fi
if [ "$output" = "f" ]; then
ocf_log info "PostgreSQL is alredy Master. Don't execute promote."
return $OCF_SUCCESS
fi
rm -f ${XLOG_NOTE_FILE}.*
for target in $NODE_LIST; do
[ "$target" = "$NODENAME" ] && continue
change_data_status "$target" "DISCONNECT"
change_master_score "$target" "$CAN_NOT_PROMOTE"
done
ocf_log info "Creating $PGSQL_LOCK."
touch $PGSQL_LOCK
show_master_baseline
if ocf_is_true ${OCF_RESKEY_restart_on_promote}; then
ocf_log info "Restarting PostgreSQL instead of promote."
#stop : this function returns $OCF_SUCCESS only.
pgsql_real_stop slave
rm -f $RECOVERY_CONF
pgsql_real_start
rc=$?
if [ $rc -ne $OCF_RUNNING_MASTER ]; then
ocf_exit_reason "Can't start PostgreSQL as primary on promote."
if [ $rc -ne $OCF_SUCCESS ]; then
change_pgsql_status "$NODENAME" "STOP"
fi
return $OCF_ERR_GENERIC
fi
else
runasowner "$OCF_RESKEY_pgctl -D $OCF_RESKEY_pgdata -W promote"
if [ $? -eq 0 ]; then
ocf_log info "PostgreSQL promote command sent."
else
ocf_exit_reason "Can't promote PostgreSQL."
return $OCF_ERR_GENERIC
fi
while :
do
pgsql_real_monitor warn
rc=$?
if [ $rc -eq $OCF_RUNNING_MASTER ]; then
break;
elif [ $rc -eq $OCF_ERR_GENERIC ]; then
ocf_exit_reason "Can't promote PostgreSQL."
return $rc
fi
sleep 1
ocf_log debug "PostgreSQL still hasn't promoted yet. Waiting..."
done
ocf_log info "PostgreSQL is promoted."
fi
# create replication slots on master after promotion
if use_replication_slot; then
create_replication_slots
if [ $? -eq $OCF_ERR_GENERIC ]; then
ocf_exit_reason "PostgreSQL can't create replication_slot."
return $OCF_ERR_GENERIC
fi
fi
change_data_status "$NODENAME" "LATEST"
exec_with_retry 0 $CRM_MASTER -v $PROMOTE_ME
change_pgsql_status "$NODENAME" "PRI"
return $OCF_SUCCESS
}
#pgsql_demote: Demote PostgreSQL
pgsql_demote() {
local rc
if ! is_replication; then
ocf_exit_reason "Not in a replication mode."
return $OCF_ERR_CONFIGURED
fi
exec_with_retry 0 $CRM_MASTER -v $CAN_NOT_PROMOTE
delete_master_baseline
if ! pgsql_status; then
ocf_log info "PostgreSQL is already stopped on demote."
else
ocf_log info "Stopping PostgreSQL on demote."
pgsql_real_stop master
rc=$?
if [ "$rc" -ne "$OCF_SUCCESS" ]; then
change_pgsql_status "$NODENAME" "UNKNOWN"
return $rc
fi
fi
change_pgsql_status "$NODENAME" "STOP"
return $OCF_SUCCESS
}
#pgsql_real_stop: Stop PostgreSQL
pgsql_real_stop() {
local rc
local count
local stop_escalate
if ocf_is_true ${OCF_RESKEY_check_wal_receiver}; then
attrd_updater -n "$PGSQL_WAL_RECEIVER_STATUS_ATTR" -D -q
fi
if ! pgsql_status
then
#Already stopped
return $OCF_SUCCESS
fi
stop_escalate=$OCF_RESKEY_stop_escalate
if [ "$1" = "slave" ]; then
stop_escalate="$OCF_RESKEY_stop_escalate_in_slave"
fi
# adjust stop_escalate time when it is longer than the timeout
if [ -n "$OCF_RESKEY_CRM_meta_timeout" ] && \
[ "$stop_escalate" -ge $((OCF_RESKEY_CRM_meta_timeout/1000)) ]; then
stop_escalate=$(((OCF_RESKEY_CRM_meta_timeout/1000) - 10))
ocf_log info "stop_escalate(or stop_escalate_in_slave) time is adjusted to ${stop_escalate} based on the configured timeout."
fi
# Stop PostgreSQL, do not wait for clients to disconnect
if [ $stop_escalate -gt 0 ]; then
runasowner "$OCF_RESKEY_pgctl -W -D $OCF_RESKEY_pgdata stop -m fast"
fi
# stop waiting
count=0
while [ $count -lt $stop_escalate ]
do
if ! pgsql_status
then
#PostgreSQL stopped
break;
fi
count=`expr $count + 1`
sleep 1
done
if pgsql_status
then
#PostgreSQL is still up. Use another shutdown mode.
ocf_log info "PostgreSQL failed to stop after ${stop_escalate}s using -m fast. Trying -m immediate..."
runasowner "$OCF_RESKEY_pgctl -W -D $OCF_RESKEY_pgdata stop -m immediate"
fi
while :
do
pgsql_real_monitor
rc=$?
if [ $rc -eq $OCF_NOT_RUNNING ]; then
# An unnecessary debug log is prevented.
break;
fi
sleep 1
ocf_log debug "PostgreSQL still hasn't stopped yet. Waiting..."
done
# Remove postmaster.pid if it exists
rm -f $PIDFILE
if [ "$1" = "master" -a "$OCF_RESKEY_CRM_meta_notify_slave_uname" = " " ]; then
ocf_log info "Removing $PGSQL_LOCK."
rm -f $PGSQL_LOCK
fi
return $OCF_SUCCESS
}
pgsql_replication_stop() {
local rc
exec_with_retry 5 $CRM_MASTER -v $CAN_NOT_PROMOTE
delete_xlog_location
if ! pgsql_status
then
ocf_log info "PostgreSQL is already stopped."
change_pgsql_status "$NODENAME" "STOP"
return $OCF_SUCCESS
fi
pgsql_real_stop slave
rc=$?
if [ $rc -ne $OCF_SUCCESS ]; then
change_pgsql_status "$NODENAME" "UNKNOWN"
return $rc
fi
change_pgsql_status "$NODENAME" "STOP"
set_async_mode_all
delete_master_baseline
return $OCF_SUCCESS
}
#pgsql_stop: pgsql_real_stop() wrapper for replication
pgsql_stop() {
if ! is_replication; then
pgsql_real_stop
return $?
else
pgsql_replication_stop
return $?
fi
}
#
# pgsql_status: is PostgreSQL up?
#
pgsql_status() {
if [ -f $PIDFILE ]
then
PID=`head -n 1 $PIDFILE`
runasowner "kill -s 0 $PID >/dev/null 2>&1"
return $?
fi
# No PID file
false
}
pgsql_wal_receiver_status() {
local PID
local receiver_parent_pids
local pgsql_real_monitor_status=$1
PID=`head -n 1 $PIDFILE`
receiver_parent_pids=`ps -ef | tr -s " " | grep "[w]al receiver process" | cut -d " " -f 3`
if echo "$receiver_parent_pids" | grep -q -w "$PID" ; then
attrd_updater -n "$PGSQL_WAL_RECEIVER_STATUS_ATTR" -v "normal" -q
return 0
fi
if [ $pgsql_real_monitor_status -eq "$OCF_RUNNING_MASTER" ]; then
attrd_updater -n "$PGSQL_WAL_RECEIVER_STATUS_ATTR" -v "normal (master)" -q
return 0
fi
attrd_updater -n "$PGSQL_WAL_RECEIVER_STATUS_ATTR" -v "ERROR" -q
ocf_log warn "wal receiver process is not running"
return 1
}
#
# pgsql_real_monitor
#
pgsql_real_monitor() {
local loglevel
local rc
local output
# Set the log level of the error message
loglevel=${1:-err}
if ! pgsql_status
then
ocf_log info "PostgreSQL is down"
return $OCF_NOT_RUNNING
fi
if is_replication; then
#Check replication state
output=`exec_sql "${CHECK_MS_SQL}"`
rc=$?
if [ $rc -ne 0 ]; then
report_psql_error $rc $loglevel "Can't get PostgreSQL recovery status."
return $OCF_ERR_GENERIC
fi
case "$output" in
f) ocf_log debug "PostgreSQL is running as a primary."
if [ "$OCF_RESKEY_monitor_sql" = "$OCF_RESKEY_monitor_sql_default" ]; then
return $OCF_RUNNING_MASTER
fi
;;
t) ocf_log debug "PostgreSQL is running as a hot standby."
return $OCF_SUCCESS;;
*) ocf_exit_reason "$CHECK_MS_SQL output is $output"
return $OCF_ERR_GENERIC;;
esac
fi
OCF_RESKEY_monitor_sql=`escape_string "$OCF_RESKEY_monitor_sql"`
runasowner -q $loglevel "$OCF_RESKEY_psql $psql_options \
-c '$OCF_RESKEY_monitor_sql'"
rc=$?
if [ $rc -ne 0 ]; then
report_psql_error $rc $loglevel "PostgreSQL $OCF_RESKEY_pgdb isn't running."
return $OCF_ERR_GENERIC
fi
if is_replication; then
return $OCF_RUNNING_MASTER
fi
return $OCF_SUCCESS
}
pgsql_replication_monitor() {
local rc
rc=$1
if [ $rc -ne $OCF_SUCCESS -a $rc -ne "$OCF_RUNNING_MASTER" ]; then
return $rc
fi
# If I am Master
if [ $rc -eq $OCF_RUNNING_MASTER ]; then
change_data_status "$NODENAME" "LATEST"
change_pgsql_status "$NODENAME" "PRI"
control_slave_status || return $OCF_ERR_GENERIC
if [ "$RE_CONTROL_SLAVE" = "true" ]; then
sleep 2
ocf_log info "re-controlling slave status."
RE_CONTROL_SLAVE="none"
control_slave_status || return $OCF_ERR_GENERIC
fi
return $rc
fi
# I can't get master node name from $OCF_RESKEY_CRM_meta_notify_master_uname on monitor,
# so I will get master node name using crm_mon -n
print_crm_mon | tr -d "\t" | tr -d " " | grep -q "^${RESOURCE_NAME}[(:].*[):].*Master"
if [ $? -ne 0 ] ; then
# If I am Slave and Master is not exist
ocf_log info "Master does not exist."
change_pgsql_status "$NODENAME" "HS:alone"
have_master_right
if [ $? -eq 0 ]; then
rm -f ${XLOG_NOTE_FILE}.*
fi
else
output=`exec_with_retry 0 $CRM_ATTR_FOREVER -N "$NODENAME" \
-n "$PGSQL_DATA_STATUS_ATTR" -G -q`
if [ "$output" = "DISCONNECT" ]; then
change_pgsql_status "$NODENAME" "HS:alone"
fi
fi
return $rc
}
#pgsql_monitor: pgsql_real_monitor() wrapper for replication
pgsql_monitor() {
local rc
pgsql_real_monitor
rc=$?
if ocf_is_true ${OCF_RESKEY_check_wal_receiver}; then
pgsql_wal_receiver_status $rc
fi
if ! is_replication; then
return $rc
else
pgsql_replication_monitor $rc
return $?
fi
}
# pgsql_post_demote
pgsql_post_demote() {
DEMOTE_NODE=`echo $OCF_RESKEY_CRM_meta_notify_demote_uname | sed "s/ /\n/g" | head -1 | tr '[A-Z]' '[a-z]'`
ocf_log debug "post-demote called. Demote uname is $DEMOTE_NODE"
if [ "$DEMOTE_NODE" != "$NODENAME" ]; then
if ! echo $OCF_RESKEY_CRM_meta_notify_master_uname | tr '[A-Z]' '[a-z]' | grep $NODENAME; then
show_master_baseline
change_pgsql_status "$NODENAME" "HS:alone"
fi
fi
return $OCF_SUCCESS
}
pgsql_pre_promote() {
local master_baseline
local my_master_baseline
local cmp_location
local number_of_nodes
# If my data is newer than new master's one, I fail my resource.
PROMOTE_NODE=`echo $OCF_RESKEY_CRM_meta_notify_promote_uname | \
sed "s/ /\n/g" | head -1 | tr '[A-Z]' '[a-z]'`
number_of_nodes=`echo $NODE_LIST | wc -w`
if [ $number_of_nodes -ge 3 -a \
"$OCF_RESKEY_rep_mode" = "sync" -a \
"$PROMOTE_NODE" != "$NODENAME" ]; then
master_baseline=`$CRM_ATTR_REBOOT -N "$PROMOTE_NODE" -n \
"$PGSQL_MASTER_BASELINE" -G -q 2>/dev/null`
if [ $? -eq 0 ]; then
my_master_baseline=`$CRM_ATTR_REBOOT -N "$NODENAME" -n \
"$PGSQL_MASTER_BASELINE" -G -q 2>/dev/null`
# get older location
cmp_location=`printf "$master_baseline\n$my_master_baseline\n" |\
sort | head -1`
if [ "$cmp_location" != "$my_master_baseline" ]; then
# We used to set the failcount to INF for the resource here in
# order to move the master to the other node. However, setting
# the failcount should be done only by the CRM and so this use
# got deprecated in pacemaker version 1.1.17. Now we do the
# "ban resource from the node".
ocf_exit_reason "My data is newer than new master's one. New master's location : $master_baseline"
exec_with_retry 0 $CRM_RESOURCE -B -r $OCF_RESOURCE_INSTANCE -N $NODENAME -Q
return $OCF_ERR_GENERIC
fi
fi
fi
return $OCF_SUCCESS
}
pgsql_notify() {
local type="${OCF_RESKEY_CRM_meta_notify_type}"
local op="${OCF_RESKEY_CRM_meta_notify_operation}"
local rc
if ! is_replication; then
return $OCF_SUCCESS
fi
ocf_log debug "notify: ${type} for ${op}"
case $type in
pre)
case $op in
promote)
pgsql_pre_promote
return $?
;;
esac
;;
post)
case $op in
promote)
delete_xlog_location
PROMOTE_NODE=`echo $OCF_RESKEY_CRM_meta_notify_promote_uname | \
sed "s/ /\n/g" | head -1 | tr '[A-Z]' '[a-z]'`
if [ "$PROMOTE_NODE" != "$NODENAME" ]; then
delete_master_baseline
fi
return $OCF_SUCCESS
;;
demote)
pgsql_post_demote
return $?
;;
start|stop)
MASTER_NODE=`echo $OCF_RESKEY_CRM_meta_notify_master_uname | \
sed "s/ /\n/g" | head -1 | tr '[A-Z]' '[a-z]'`
if [ "$NODENAME" = "$MASTER_NODE" ]; then
control_slave_status
fi
return $OCF_SUCCESS
;;
esac
;;
esac
return $OCF_SUCCESS
}
control_slave_status() {
local rc
local data_status
local target
local all_data_status
local tmp_data_status
local number_of_nodes
all_data_status=`exec_sql "${CHECK_REPLICATION_STATE_SQL}"`
rc=$?
if [ $rc -eq 0 ]; then
if [ -n "$all_data_status" ]; then
all_data_status=`echo $all_data_status | sed "s/\n/ /g"`
fi
else
report_psql_error $rc err "Can't get PostgreSQL replication status."
return 1
fi
number_of_nodes=`echo $NODE_LIST | wc -w`
for target in $NODE_LIST; do
if [ "$target" = "$NODENAME" ]; then
continue
fi
data_status="DISCONNECT"
if [ -n "$all_data_status" ]; then
for tmp_data_status in $all_data_status; do
if ! echo $tmp_data_status | grep -q "^${target}|"; then
continue
fi
data_status=`echo $tmp_data_status | cut -d "|" -f 2,3`
ocf_log debug "node_name and data_status is $tmp_data_status"
break
done
fi
case "$data_status" in
"STREAMING|SYNC")
change_data_status "$target" "$data_status"
change_master_score "$target" "$CAN_PROMOTE"
change_pgsql_status "$target" "HS:sync"
;;
"STREAMING|ASYNC")
change_data_status "$target" "$data_status"
if [ "$OCF_RESKEY_rep_mode" = "sync" ]; then
change_master_score "$target" "$CAN_NOT_PROMOTE"
set_sync_mode "$target"
else
if [ $number_of_nodes -le 2 ]; then
change_master_score "$target" "$CAN_PROMOTE"
else
# I can't determine which slave's data is newest in async mode.
change_master_score "$target" "$CAN_NOT_PROMOTE"
fi
fi
change_pgsql_status "$target" "HS:async"
;;
"STREAMING|POTENTIAL")
change_data_status "$target" "$data_status"
change_master_score "$target" "$CAN_NOT_PROMOTE"
change_pgsql_status "$target" "HS:potential"
;;
"DISCONNECT")
change_data_status "$target" "$data_status"
change_master_score "$target" "$CAN_NOT_PROMOTE"
if [ "$OCF_RESKEY_rep_mode" = "sync" ]; then
set_async_mode "$target"
fi
;;
*)
change_data_status "$target" "$data_status"
change_master_score "$target" "$CAN_NOT_PROMOTE"
if [ "$OCF_RESKEY_rep_mode" = "sync" ]; then
set_async_mode "$target"
fi
change_pgsql_status "$target" "HS:connected"
;;
esac
done
return 0
}
have_master_right() {
local old
local new
local output
local data_status
local node
local mylocation
local count
local newestXlog
local oldfile
local newfile
ocf_log debug "Checking if I have a master right."
data_status=`$CRM_ATTR_FOREVER -N "$NODENAME" -n \
"$PGSQL_DATA_STATUS_ATTR" -G -q 2>/dev/null`
if [ "$OCF_RESKEY_rep_mode" = "sync" ]; then
if [ -n "$data_status" -a "$data_status" != "STREAMING|SYNC" -a \
"$data_status" != "LATEST" ]; then
ocf_log warn "My data is out-of-date. status=$data_status"
return 1
fi
else
if [ -n "$data_status" -a "$data_status" != "STREAMING|SYNC" -a \
"$data_status" != "STREAMING|ASYNC" -a \
"$data_status" != "LATEST" ]; then
ocf_log warn "My data is out-of-date. status=$data_status"
return 1
fi
fi
ocf_log info "My data status=$data_status."
show_xlog_location
if [ $? -ne 0 ]; then
ocf_exit_reason "Failed to show my xlog location."
exit $OCF_ERR_GENERIC
fi
old=0
for count in `seq $OCF_RESKEY_xlog_check_count`; do
if [ -f ${XLOG_NOTE_FILE}.$count ]; then
old=$count
continue
fi
break
done
new=`expr $old + 1`
# get xlog locations of all nodes
for node in ${NODE_LIST}; do
output=`$CRM_ATTR_REBOOT -N "$node" -n \
"$PGSQL_XLOG_LOC_NAME" -G -q 2>/dev/null`
if [ $? -ne 0 ]; then
ocf_log warn "Can't get $node xlog location."
continue
else
ocf_log info "$node xlog location : $output"
echo "$node $output" >> ${XLOG_NOTE_FILE}.${new}
if [ "$node" = "$NODENAME" ]; then
mylocation=$output
fi
fi
done
oldfile=`cat ${XLOG_NOTE_FILE}.${old} 2>/dev/null`
newfile=`cat ${XLOG_NOTE_FILE}.${new} 2>/dev/null`
if [ "$oldfile" != "$newfile" ]; then
# reset counter
rm -f ${XLOG_NOTE_FILE}.*
printf "$newfile\n" > ${XLOG_NOTE_FILE}.0
return 1
fi
if [ "$new" -ge "$OCF_RESKEY_xlog_check_count" ]; then
newestXlog=`printf "$newfile\n" | sort -t " " -k 2,3 -r | \
head -1 | cut -d " " -f 2`
if [ "$newestXlog" = "$mylocation" ]; then
ocf_log info "I have a master right."
exec_with_retry 5 $CRM_MASTER -v $PROMOTE_ME
return 0
fi
change_data_status "$NODENAME" "DISCONNECT"
ocf_log info "I don't have correct master data."
# reset counter
rm -f ${XLOG_NOTE_FILE}.*
printf "$newfile\n" > ${XLOG_NOTE_FILE}.0
fi
return 1
}
is_replication() {
if [ "$OCF_RESKEY_rep_mode" != "none" -a "$OCF_RESKEY_rep_mode" != "slave" ]; then
return 0
fi
return 1
}
use_replication_slot() {
if [ -n "$OCF_RESKEY_replication_slot_name" ]; then
return 0
fi
return 1
}
create_replication_slot_name() {
local number_of_nodes=0
local target
local replication_slot_name
local replication_slot_name_list_tmp
local replication_slot_name_list
if [ -n "$NODE_LIST" ]; then
number_of_nodes=`echo $NODE_LIST | wc -w`
fi
if [ $number_of_nodes -le 0 ]; then
replication_slot_name_list=""
# The Master node should have some slots equal to the number of Slaves, and
# the Slave nodes connect to their dedicated slot on the Master.
# To ensuring that the slots name are each unique, add postfix to $OCF_RESKEY_replication_slot.
# The postfix is "_$target".
else
for target in $NODE_LIST
do
if [ "$target" != "$NODENAME" ]; then
# The Uppercase, "-" and "." don't allow to use in slot_name.
# If the NODENAME contains them, convert upper case to lower case and "_" and "." to "_".
target=`echo "$target" | tr 'A-Z.-' 'a-z__'`
replication_slot_name="$OCF_RESKEY_replication_slot_name"_"$target"
replication_slot_name_list_tmp="$replication_slot_name_list"
replication_slot_name_list="$replication_slot_name_list_tmp $replication_slot_name"
fi
done
fi
echo $replication_slot_name_list
}
delete_replication_slot(){
DELETE_REPLICATION_SLOT_sql="SELECT pg_drop_replication_slot('$1');"
output=`exec_sql "$DELETE_REPLICATION_SLOT_sql"`
return $?
}
delete_replication_slots() {
local replication_slot_name_list
local replication_slot_name
replication_slot_name_list=`create_replication_slot_name`
ocf_log debug "replication slot names are $replication_slot_name_list."
for replication_slot_name in $replication_slot_name_list
do
if [ `check_replication_slot $replication_slot_name` = "1" ]; then
delete_replication_slot $replication_slot_name
if [ $? -eq 0 ]; then
ocf_log info "PostgreSQL delete the replication slot($replication_slot_name)."
else
ocf_exit_reason "$output"
return $OCF_ERR_GENERIC
fi
fi
done
}
create_replication_slots() {
local replication_slot_name
local replication_slot_name_list
local output
local rc
local CREATE_REPLICATION_SLOT_sql
local DELETE_REPLICATION_SLOT_sql
replication_slot_name_list=`create_replication_slot_name`
ocf_log debug "replication slot names are $replication_slot_name_list."
for replication_slot_name in $replication_slot_name_list
do
# If the same name slot is already exists, initialize(delete and create) the slot.
if [ `check_replication_slot $replication_slot_name` = "1" ]; then
delete_replication_slot $replication_slot_name
if [ $? -eq 0 ]; then
ocf_log info "PostgreSQL delete the replication slot($replication_slot_name)."
else
ocf_exit_reason "$output"
return $OCF_ERR_GENERIC
fi
fi
CREATE_REPLICATION_SLOT_sql="SELECT pg_create_physical_replication_slot('$replication_slot_name');"
output=`exec_sql "$CREATE_REPLICATION_SLOT_sql"`
rc=$?
if [ $rc -eq 0 ]; then
ocf_log info "PostgreSQL creates the replication slot($replication_slot_name)."
else
ocf_exit_reason "$output"
return $OCF_ERR_GENERIC
fi
done
return 0
}
# This function check the replication slot does exists.
check_replication_slot(){
local replication_slot_name=$1
local output
local CHECK_REPLICATION_SLOT_sql="SELECT count(*) FROM pg_replication_slots WHERE slot_name = '$replication_slot_name'"
output=`exec_sql "$CHECK_REPLICATION_SLOT_sql"`
echo "$output"
}
# On postgreSQL 10 or later, "location" means "lsn".
get_my_location() {
local rc
local output
local replay_loc
local receive_loc
local output1
local output2
local log1
local log2
local newer_location
output=`exec_sql "$CHECK_XLOG_LOC_SQL"`
rc=$?
if [ $rc -ne 0 ]; then
report_psql_error $rc err "Can't get my xlog location."
return 1
fi
replay_loc=`echo $output | cut -d "|" -f 1`
receive_loc=`echo $output | cut -d "|" -f 2`
output1=`echo "$replay_loc" | cut -d "/" -f 1`
output2=`echo "$replay_loc" | cut -d "/" -f 2`
log1=`printf "%08s\n" $output1 | sed "s/ /0/g"`
log2=`printf "%08s\n" $output2 | sed "s/ /0/g"`
replay_loc="${log1}${log2}"
output1=`echo "$receive_loc" | cut -d "/" -f 1`
output2=`echo "$receive_loc" | cut -d "/" -f 2`
log1=`printf "%08s\n" $output1 | sed "s/ /0/g"`
log2=`printf "%08s\n" $output2 | sed "s/ /0/g"`
receive_loc="${log1}${log2}"
newer_location=`printf "$replay_loc\n$receive_loc" | sort -r | head -1`
echo "$newer_location"
return 0
}
# On postgreSQL 10 or later, "xlog_location" means "wal_lsn".
show_xlog_location() {
local location
location=`get_my_location` || return 1
exec_with_retry 0 $CRM_ATTR_REBOOT -N "$NODENAME" -n "$PGSQL_XLOG_LOC_NAME" -v "$location"
}
# On postgreSQL 10 or later, "xlog_location" means "wal_lsn".
delete_xlog_location() {
exec_with_retry 5 $CRM_ATTR_REBOOT -N "$NODENAME" -n "$PGSQL_XLOG_LOC_NAME" -D
}
show_master_baseline() {
local rc
local location
location=`get_my_location`
ocf_log info "My master baseline : $location."
exec_with_retry 0 $CRM_ATTR_REBOOT -N "$NODENAME" -n "$PGSQL_MASTER_BASELINE" -v "$location"
}
delete_master_baseline() {
exec_with_retry 5 $CRM_ATTR_REBOOT -N "$NODENAME" -n "$PGSQL_MASTER_BASELINE" -D
}
set_async_mode_all() {
[ "$OCF_RESKEY_rep_mode" = "sync" ] || return 0
ocf_log info "Set all nodes into async mode."
runasowner -q err "echo \"synchronous_standby_names = ''\" > \"$REP_MODE_CONF\""
if [ $? -ne 0 ]; then
ocf_exit_reason "Can't set all nodes into async mode."
return 1
fi
return 0
}
set_async_mode() {
cat $REP_MODE_CONF | grep -q -E "(\"$1\")|([,' ]$1[,' ])"
if [ $? -eq 0 ]; then
ocf_log info "Setup $1 into async mode."
runasowner -q err "echo \"synchronous_standby_names = ''\" > \"$REP_MODE_CONF\""
else
ocf_log debug "$1 is already in async mode."
return 0
fi
exec_with_retry 0 reload_conf
}
set_sync_mode() {
local sync_node_in_conf
sync_node_in_conf=`cat $REP_MODE_CONF | cut -d "'" -f 2`
if [ -n "$sync_node_in_conf" ]; then
ocf_log debug "$sync_node_in_conf is already sync mode."
else
ocf_log info "Setup $1 into sync mode."
runasowner -q err "echo \"synchronous_standby_names = '\\\"$1\\\"'\" > \"$REP_MODE_CONF\""
[ "$RE_CONTROL_SLAVE" = "false" ] && RE_CONTROL_SLAVE="true"
exec_with_retry 0 reload_conf
fi
}
reload_conf() {
# Invoke pg_ctl
runasowner "$OCF_RESKEY_pgctl -D $OCF_RESKEY_pgdata reload"
if [ $? -eq 0 ]; then
ocf_log info "Reload configuration file."
else
ocf_exit_reason "Can't reload configuration file."
return 1
fi
return 0
}
user_recovery_conf() {
local nodename_tmp
# put archive_cleanup_command and recovery_end_command only when defined by user
if [ -n "$OCF_RESKEY_archive_cleanup_command" ]; then
echo "archive_cleanup_command = '${OCF_RESKEY_archive_cleanup_command}'"
fi
if [ -n "$OCF_RESKEY_recovery_end_command" ]; then
echo "recovery_end_command = '${OCF_RESKEY_recovery_end_command}'"
fi
if use_replication_slot; then
nodename_tmp=`echo "$NODENAME" | tr 'A-Z.-' 'a-z__'`
echo "primary_slot_name = '${OCF_RESKEY_replication_slot_name}_$nodename_tmp'"
fi
}
make_recovery_conf() {
runasowner "touch $RECOVERY_CONF"
if [ $? -ne 0 ]; then
ocf_exit_reason "Can't create recovery.conf."
return 1
fi
cat > $RECOVERY_CONF <<END
standby_mode = 'on'
primary_conninfo = 'host=${OCF_RESKEY_master_ip} port=${OCF_RESKEY_pgport} user=${OCF_RESKEY_repuser} application_name=${NODENAME} ${OCF_RESKEY_primary_conninfo_opt}'
restore_command = '${OCF_RESKEY_restore_command}'
recovery_target_timeline = 'latest'
END
user_recovery_conf >> $RECOVERY_CONF
ocf_log debug "Created recovery.conf. host=${OCF_RESKEY_master_ip}, user=${OCF_RESKEY_repuser}"
return 0
}
# change pgsql-status.
# arg1:node, arg2: value
change_pgsql_status() {
local output
if ! is_node_online $1; then
return 0
fi
output=`$CRM_ATTR_REBOOT -N "$1" -n "$PGSQL_STATUS_ATTR" -G -q 2>/dev/null`
if [ "$output" != "$2" ]; then
# If slave's disk is broken, RA cannot read PID file
# and misjudges the PostgreSQL as down while it is running.
# It causes overwriting of pgsql-status by Master because replication is still connected.
if [ "$output" = "STOP" -o "$output" = "UNKNOWN" ]; then
if [ "$1" != "$NODENAME" ]; then
ocf_log warn "Changing $PGSQL_STATUS_ATTR on $1 : $output->$2 by $NODENAME is prohibited."
return 0
fi
fi
ocf_log info "Changing $PGSQL_STATUS_ATTR on $1 : $output->$2."
exec_with_retry 0 $CRM_ATTR_REBOOT -N "$1" -n "$PGSQL_STATUS_ATTR" -v "$2"
fi
return 0
}
# change pgsql-data-status.
# arg1:node, arg2: value
change_data_status() {
local output
if ! node_exist $1; then
return 0
fi
while :
do
output=`$CRM_ATTR_FOREVER -N "$1" -n "$PGSQL_DATA_STATUS_ATTR" -G -q 2>/dev/null`
if [ "$output" != "$2" ]; then
ocf_log info "Changing $PGSQL_DATA_STATUS_ATTR on $1 : $output->$2."
exec_with_retry 0 exec_with_timeout 0 "$CRM_ATTR_FOREVER" -N $1 -n $PGSQL_DATA_STATUS_ATTR -v "$2"
else
break
fi
done
return 0
}
# set master-score
# arg1:node, arg2: score, arg3: resoure
set_master_score() {
local current_score
current_score=`$CRM_ATTR_REBOOT -N "$1" -n "master-$3" -G -q 2>/dev/null`
if [ -n "$current_score" -a "$current_score" != "$2" ]; then
ocf_log info "Changing $3 master score on $1 : $current_score->$2."
exec_with_retry 0 $CRM_ATTR_REBOOT -N "$1" -n "master-$3" -v "$2"
fi
return 0
}
# change master-score
# arg1:node, arg2: score
change_master_score() {
local instance
if ! is_node_online $1; then
return 0
fi
if echo $OCF_RESOURCE_INSTANCE | grep -q ":"; then
# If Pacemaker version is 1.0.x
instance=0
while :
do
if [ "$instance" -ge "$OCF_RESKEY_CRM_meta_clone_max" ]; then
break
fi
if [ "${RESOURCE_NAME}:${instance}" = "$OCF_RESOURCE_INSTANCE" ]; then
instance=`expr $instance + 1`
continue
fi
set_master_score $1 $2 "${RESOURCE_NAME}:${instance}" || return 1
instance=`expr $instance + 1`
done
else
# If globally-unique=false and Pacemaker version is 1.1.8 or higher
# Master/Slave resource has no instance number
set_master_score $1 $2 ${RESOURCE_NAME} || return 1
fi
return 0
}
report_psql_error()
{
local rc
local loglevel
local message
rc=$1
loglevel=${2:-err}
message="$3"
ocf_log $loglevel "$message rc=$rc"
if [ $rc -eq 1 ]; then
ocf_exit_reason "Fatal error (out of memory, file not found, etc.) occurred while executing the psql command."
elif [ $rc -eq 2 ]; then
ocf_log $loglevel "Connection error (connection to the server went bad and the session was not interactive) occurred while executing the psql command."
elif [ $rc -eq 3 ]; then
ocf_exit_reason "Script error (the variable ON_ERROR_STOP was set) occurred while executing the psql command."
fi
}
#
# timeout management function
# arg1 timeout >= 0 (if arg1 is 0, OCF_RESKEY_crm_attr_timeout is used.)
# arg2 : command
# arg3 : command's args
exec_with_timeout() {
local func_pid
local count=$OCF_RESKEY_crm_attr_timeout
local rc
if [ "$1" -ne 0 ]; then
count=$1
fi
shift
$* &
func_pid=$!
sleep .1
while kill -s 0 $func_pid >/dev/null 2>&1; do
sleep 1
count=`expr $count - 1`
if [ $count -le 0 ]; then
ocf_exit_reason "\"$*\" (pid=$func_pid) timed out."
kill -s 9 $func_pid >/dev/null 2>&1
return 1
fi
ocf_log info "Waiting($count). \"$*\" (pid=$func_pid)."
done
wait $func_pid
}
# retry command when command doesn't return 0
# arg1 : count >= 0 (if arg1 is 0, it retries command in infinitum(1day))
# arg2..argN : command and args
exec_with_retry() {
local count="86400"
local output
local rc
if [ "$1" -ne 0 ]; then
count=$1
fi
shift
while [ $count -gt 0 ]; do
output=`$*`
rc=$?
if [ $rc -ne 0 ]; then
ocf_log warn "Retrying(remain $count). \"$*\" failed. rc=$rc. stdout=\"$output\"."
count=`expr $count - 1`
sleep 1
else
printf "${output}"
return 0
fi
done
ocf_exit_reason "giving up executing \"$*\""
return $rc
}
is_node_online() {
print_crm_mon | tr '[A-Z]' '[a-z]' | grep -e "^node $1 " -e "^node $1:" | grep -q -v "offline"
}
node_exist() {
print_crm_mon | tr '[A-Z]' '[a-z]' | grep -q "^node $1"
}
check_binary2() {
if ! have_binary "$1"; then
ocf_exit_reason "Setup problem: couldn't find command: $1"
return 1
fi
return 0
}
check_config() {
local rc=0
if [ ! -f "$1" ]; then
if ocf_is_probe; then
ocf_log info "Configuration file is $1 not readable during probe."
rc=1
else
ocf_exit_reason "Configuration file $1 doesn't exist"
rc=2
fi
fi
return $rc
}
# Validate most critical parameters
pgsql_validate_all() {
local version
local check_config_rc
local rep_mode_string
local socket_directories
local rc
version=`cat $OCF_RESKEY_pgdata/PG_VERSION`
if ! check_binary2 "$OCF_RESKEY_pgctl" ||
! check_binary2 "$OCF_RESKEY_psql"; then
return $OCF_ERR_INSTALLED
fi
check_config "$OCF_RESKEY_config"
check_config_rc=$?
[ $check_config_rc -eq 2 ] && return $OCF_ERR_INSTALLED
if [ $check_config_rc -eq 0 ]; then
ocf_version_cmp "$version" "9.3"
if [ $? -eq 0 ]; then
: ${OCF_RESKEY_socketdir=`get_pgsql_param unix_socket_directory`}
else
# unix_socket_directories is used by PostgreSQL 9.3 or higher.
socket_directories=`get_pgsql_param unix_socket_directories`
if [ -n "$socket_directories" ]; then
# unix_socket_directories may have multiple socket directories and the pgsql RA can not know which directory is used for psql command.
# Therefore, the user must set OCF_RESKEY_socketdir explicitly.
if [ -z "$OCF_RESKEY_socketdir" ]; then
ocf_exit_reason "In PostgreSQL 9.3 or higher, socketdir can't be empty if you define unix_socket_directories in the postgresql.conf."
return $OCF_ERR_CONFIGURED
fi
fi
fi
fi
getent passwd $OCF_RESKEY_pgdba >/dev/null 2>&1
if [ ! $? -eq 0 ]; then
ocf_exit_reason "User $OCF_RESKEY_pgdba doesn't exist";
return $OCF_ERR_INSTALLED;
fi
if ocf_is_probe; then
ocf_log info "Don't check $OCF_RESKEY_pgdata during probe"
else
if ! runasowner "test -w $OCF_RESKEY_pgdata"; then
ocf_exit_reason "Directory $OCF_RESKEY_pgdata is not writable by $OCF_RESKEY_pgdba"
return $OCF_ERR_PERM;
fi
fi
if [ -n "$OCF_RESKEY_monitor_user" -a ! -n "$OCF_RESKEY_monitor_password" ]
then
ocf_exit_reason "monitor password can't be empty"
return $OCF_ERR_CONFIGURED
fi
if [ ! -n "$OCF_RESKEY_monitor_user" -a -n "$OCF_RESKEY_monitor_password" ]
then
ocf_exit_reason "monitor_user has to be set if monitor_password is set"
return $OCF_ERR_CONFIGURED
fi
if is_replication || [ "$OCF_RESKEY_rep_mode" = "slave" ]; then
if [ `printf "$version\n9.1" | sort -n | head -1` != "9.1" ]; then
ocf_exit_reason "Replication mode needs PostgreSQL 9.1 or higher."
return $OCF_ERR_INSTALLED
fi
if [ ! -n "$OCF_RESKEY_master_ip" ]; then
ocf_exit_reason "master_ip can't be empty."
return $OCF_ERR_CONFIGURED
fi
fi
if is_replication; then
REP_MODE_CONF=${OCF_RESKEY_tmpdir}/rep_mode.conf
PGSQL_LOCK=${OCF_RESKEY_tmpdir}/PGSQL.lock
XLOG_NOTE_FILE=${OCF_RESKEY_tmpdir}/xlog_note
CRM_MASTER="${HA_SBIN_DIR}/crm_master -l reboot"
CRM_ATTR_REBOOT="${HA_SBIN_DIR}/crm_attribute -l reboot"
CRM_ATTR_FOREVER="${HA_SBIN_DIR}/crm_attribute -l forever"
CRM_RESOURCE="${HA_SBIN_DIR}/crm_resource"
CAN_NOT_PROMOTE="-INFINITY"
CAN_PROMOTE="100"
PROMOTE_ME="1000"
CHECK_MS_SQL="select pg_is_in_recovery()"
CHECK_SYNCHRONOUS_STANDBY_NAMES_SQL="show synchronous_standby_names"
ocf_version_cmp "$version" "10"
rc=$?
if [ $rc -eq 1 ]||[ $rc -eq 2 ]; then
CHECK_XLOG_LOC_SQL="select pg_last_wal_replay_lsn(),pg_last_wal_receive_lsn()"
else
CHECK_XLOG_LOC_SQL="select pg_last_xlog_replay_location(),pg_last_xlog_receive_location()"
fi
CHECK_REPLICATION_STATE_SQL="select application_name,upper(state),upper(sync_state) from pg_stat_replication"
PGSQL_STATUS_ATTR="${RESOURCE_NAME}-status"
PGSQL_DATA_STATUS_ATTR="${RESOURCE_NAME}-data-status"
PGSQL_XLOG_LOC_NAME="${RESOURCE_NAME}-xlog-loc"
PGSQL_MASTER_BASELINE="${RESOURCE_NAME}-master-baseline"
NODE_LIST=`echo $OCF_RESKEY_node_list | tr '[A-Z]' '[a-z]'`
RE_CONTROL_SLAVE="false"
if ! ocf_is_ms; then
ocf_exit_reason "Replication(rep_mode=async or sync) requires Master/Slave configuration."
return $OCF_ERR_CONFIGURED
fi
if [ ! "$OCF_RESKEY_rep_mode" = "sync" -a ! "$OCF_RESKEY_rep_mode" = "async" ]; then
ocf_exit_reason "Invalid rep_mode : $OCF_RESKEY_rep_mode"
return $OCF_ERR_CONFIGURED
fi
if [ ! -n "$NODE_LIST" ]; then
ocf_exit_reason "node_list can't be empty."
return $OCF_ERR_CONFIGURED
fi
if [ $check_config_rc -eq 0 ]; then
rep_mode_string="include '$REP_MODE_CONF' # added by pgsql RA"
if [ "$OCF_RESKEY_rep_mode" = "sync" ]; then
if ! grep -q "^[[:space:]]*$rep_mode_string" $OCF_RESKEY_config; then
ocf_log info "adding include directive into $OCF_RESKEY_config"
echo "$rep_mode_string" >> $OCF_RESKEY_config
fi
else
if grep -q "$rep_mode_string" $OCF_RESKEY_config; then
ocf_log info "deleting include directive from $OCF_RESKEY_config"
rep_mode_string=`echo $rep_mode_string | sed -e 's|/|\\\\/|g'`
sed -i "/$rep_mode_string/d" $OCF_RESKEY_config
fi
fi
fi
if ! mkdir -p $OCF_RESKEY_tmpdir || ! chown $OCF_RESKEY_pgdba $OCF_RESKEY_tmpdir || ! chmod 700 $OCF_RESKEY_tmpdir; then
ocf_exit_reason "Can't create directory $OCF_RESKEY_tmpdir or it is not readable by $OCF_RESKEY_pgdba"
return $OCF_ERR_PERM
fi
fi
if [ "$OCF_RESKEY_rep_mode" = "slave" ]; then
if ocf_is_ms; then
ocf_exit_reason "Replication(rep_mode=slave) does not support Master/Slave configuration."
return $OCF_ERR_CONFIGURED
fi
fi
if use_replication_slot; then
ocf_version_cmp "$version" "9.4"
rc=$?
if [ $rc -eq 0 ]||[ $rc -eq 3 ]; then
ocf_exit_reason "Replication slot needs PostgreSQL 9.4 or higher."
return $OCF_ERR_CONFIGURED
fi
echo "$OCF_RESKEY_replication_slot_name" | grep -q -e '[^a-z0-9_]'
if [ $? -eq 0 ]; then
ocf_exit_reason "Invalid replication_slot_name($OCF_RESKEY_replication_slot_name). only use lower case letters, numbers, and the underscore character."
return $OCF_ERR_CONFIGURED
fi
fi
return $OCF_SUCCESS
}
#
# Check if we need to create a log file
#
check_log_file() {
if [ ! -e "$1" ]
then
touch $1 > /dev/null 2>&1
chown $OCF_RESKEY_pgdba:`getent passwd $OCF_RESKEY_pgdba | cut -d ":" -f 4` $1
fi
#Check if $OCF_RESKEY_pgdba can write to the log file
if ! runasowner "test -w $1"
then
return 1
fi
return 0
}
#
# Check if we need to create stats temp directory in tmpfs
#
check_stat_temp_directory() {
local stats_temp
stats_temp=`get_pgsql_param stats_temp_directory`
if [ -z "$stats_temp" ]; then
return
fi
if [ "${stats_temp#/}" = "$stats_temp" ]; then
stats_temp="$OCF_RESKEY_pgdata/$stats_temp"
fi
if [ -d "$stats_temp" ]; then
return
fi
if ! mkdir -p "$stats_temp"; then
ocf_exit_reason "Can't create directory $stats_temp"
exit $OCF_ERR_PERM
fi
if ! chown $OCF_RESKEY_pgdba: "$stats_temp"; then
ocf_exit_reason "Can't change ownership for $stats_temp"
exit $OCF_ERR_PERM
fi
if ! chmod 700 "$stats_temp"; then
ocf_exit_reason "Can't change permissions for $stats_temp"
exit $OCF_ERR_PERM
fi
}
#
# Check socket directory
#
check_socket_dir() {
if [ ! -d "$OCF_RESKEY_socketdir" ]; then
if ! mkdir "$OCF_RESKEY_socketdir"; then
ocf_exit_reason "Can't create directory $OCF_RESKEY_socketdir"
exit $OCF_ERR_PERM
fi
if ! chown $OCF_RESKEY_pgdba:`getent passwd \
$OCF_RESKEY_pgdba | cut -d ":" -f 4` "$OCF_RESKEY_socketdir"
then
ocf_exit_reason "Can't change ownership for $OCF_RESKEY_socketdir"
exit $OCF_ERR_PERM
fi
if ! chmod 2775 "$OCF_RESKEY_socketdir"; then
ocf_exit_reason "Can't change permissions for $OCF_RESKEY_socketdir"
exit $OCF_ERR_PERM
fi
else
if ! runasowner "touch $OCF_RESKEY_socketdir/test.$$"; then
ocf_exit_reason "$OCF_RESKEY_pgdba can't create files in $OCF_RESKEY_socketdir"
exit $OCF_ERR_PERM
fi
rm $OCF_RESKEY_socketdir/test.$$
fi
}
print_crm_mon() {
if [ -z "$CRM_MON_OUTPUT" ]; then
CRM_MON_OUTPUT=`exec_with_retry 0 crm_mon -n1`
fi
printf "${CRM_MON_OUTPUT}\n"
}
#
# 'main' starts here...
#
if [ $# -ne 1 ]
then
usage
exit $OCF_ERR_GENERIC
fi
PIDFILE=${OCF_RESKEY_pgdata}/postmaster.pid
BACKUPLABEL=${OCF_RESKEY_pgdata}/backup_label
RESOURCE_NAME=`echo $OCF_RESOURCE_INSTANCE | cut -d ":" -f 1`
PGSQL_WAL_RECEIVER_STATUS_ATTR="${RESOURCE_NAME}-receiver-status"
RECOVERY_CONF=${OCF_RESKEY_pgdata}/recovery.conf
NODENAME=$(ocf_local_nodename | tr '[A-Z]' '[a-z]')
case "$1" in
methods) pgsql_methods
exit $?;;
meta-data) meta_data
exit $OCF_SUCCESS;;
esac
pgsql_validate_all
rc=$?
[ "$1" = "validate-all" ] && exit $rc
if [ $rc -ne 0 ]
then
case "$1" in
stop) if is_replication; then
change_pgsql_status "$NODENAME" "UNKNOWN"
fi
exit $OCF_SUCCESS;;
monitor) exit $OCF_NOT_RUNNING;;
status) exit $OCF_NOT_RUNNING;;
*) exit $rc;;
esac
fi
US=`id -u -n`
if [ $US != root -a $US != $OCF_RESKEY_pgdba ]
then
ocf_exit_reason "$0 must be run as root or $OCF_RESKEY_pgdba"
exit $OCF_ERR_GENERIC
fi
# make psql command options
if [ -n "$OCF_RESKEY_monitor_user" ]; then
PGUSER=$OCF_RESKEY_monitor_user; export PGUSER
PGPASSWORD=$OCF_RESKEY_monitor_password; export PGPASSWORD
psql_options="-p $OCF_RESKEY_pgport $OCF_RESKEY_pgdb"
else
psql_options="-p $OCF_RESKEY_pgport -U $OCF_RESKEY_pgdba $OCF_RESKEY_pgdb"
fi
if [ -n "$OCF_RESKEY_pghost" ]; then
psql_options="$psql_options -h $OCF_RESKEY_pghost"
else
if [ -n "$OCF_RESKEY_socketdir" ]; then
psql_options="$psql_options -h $OCF_RESKEY_socketdir"
fi
fi
if [ -n "$OCF_RESKEY_pgport" ]; then
export PGPORT=$OCF_RESKEY_pgport
fi
if [ -n "$OCF_RESKEY_pglibs" ]; then
if [ -n "$LD_LIBRARY_PATH" ]; then
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$OCF_RESKEY_pglibs
else
export LD_LIBRARY_PATH=$OCF_RESKEY_pglibs
fi
fi
# What kind of method was invoked?
case "$1" in
status) if pgsql_status
then
ocf_log info "PostgreSQL is up"
exit $OCF_SUCCESS
else
ocf_log info "PostgreSQL is down"
exit $OCF_NOT_RUNNING
fi;;
monitor) pgsql_monitor
exit $?;;
start) pgsql_start
exit $?;;
promote) pgsql_promote
exit $?;;
demote) pgsql_demote
exit $?;;
notify) pgsql_notify
exit $?;;
stop) pgsql_stop
exit $?;;
*)
exit $OCF_ERR_UNIMPLEMENTED;;
esac