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List: linux-ha-dev
Subject: Re: [Linux-ha-dev] Resubmission of the "new" db2 agent with HADR
From: Holger Teutsch <holger.teutsch () web ! de>
Date: 2011-02-24 15:28:49
Message-ID: 1298561329.6086.12.camel () hotlx2 ! hotbso ! de
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Hi Dejan,
On Thu, 2011-02-24 at 11:08 +0100, Dejan Muhamedagic wrote:
> Hi Holger,
>
> On Wed, Feb 23, 2011 at 06:03:21PM +0100, Holger Teutsch wrote:
> > Hi Dejan,
> >
> > On Wed, 2011-02-23 at 11:54 +0100, Dejan Muhamedagic wrote:
> > > Hi Holger,
> > >
> > > On Tue, Feb 22, 2011 at 06:25:37PM +0100, Holger Teutsch wrote:
> > > > Hi,
> > > > I resubmit the db2 agent for inclusion into the project. Besides fixing
....
> > > > @@ -417,8 +445,12 @@
> > > > ocf_log err "Possible split brain ! Manual intervention required."
> > > > ocf_log err "If this DB is outdated use \"db2 start hadr on db $db as \
> > > > standby\"" ocf_log err "If this DB is the surviving primary use \"db2 start \
> > > > hadr on db $db as primary by force\""
> > > > - # should we return OCF_ERR_INSTALLED instead ?
> > > > - # might be a timing problem
> > > > +
> > > > + # might be a timing problem because "First active log" is \
> > > > delayed + # sleep long so we won't end up in a high speed \
> > > > retry loop + # lrmd will kill us eventually on timeout
> > > > + # on the next start attempt we might succeed when FAL was \
> > > > advanced + sleep 36000
> > >
> > > Perhaps you should still remove this sleep. If there's nothing
> > > that can be done without administrator intervention, then better
> > > exit soon and let the cluster try to recover whichever way it can
> > > (depending also on how it is configured).
> > >
> >
> > Yes, but we can end up in a "high speed" restart loop. Instead of
> > putting in some random sleep I felt that relying on the administrator's
> > timeout choice is better.
>
> Well, the RA should always tell the truth and in this case it
> gives an impression that there was a timeout even though there
> wasn't one. What is it actually that should or shouldn't happen
> at this point? Does it want to say: "I cannot be started anymore
> on this node"? Is that just a temporary condition? BTW, even if
> it gets into a restart loop, that cannot make things any worse,
> right? I can't say really, but somehow doing an artificial
> timeout doesn't look right.
The scenario is:
"I am a lonesome Primary and could not connect to my Standby during
startup within HADR_TIMEOUT seconds"
So multiple causes, multiple possible resolutions...
-> no sleep, return the truth: generic error
Regards
Holger
------------------ reference -----------------------
--- a/db2 Wed Feb 23 18:24:59 2011 +0100
+++ b/db2 Thu Feb 24 16:15:55 2011 +0100
@@ -446,11 +446,11 @@
ocf_log err "If this DB is outdated use \"db2 start hadr on db $db \
as standby\""
ocf_log err "If this DB is the surviving primary use \"db2 start \
hadr on db $db as primary by force\""
+ # might be the Standby is not yet there
# might be a timing problem because "First active log" is delayed
- # sleep long so we won't end up in a high speed retry loop
- # lrmd will kill us eventually on timeout
- # on the next start attempt we might succeed when FAL was advanced
- sleep 36000
+ # on the next start attempt we might succeed when FAL was \
advanced + # might be manual intervention is required
+ # ... so let pacemaker give it another try and we will succeed then
return $OCF_ERR_GENERIC
;;
["db2" (application/x-shellscript)]
#!/bin/sh
#
# db2
#
# Resource agent that manages a DB2 LUW database in Standard role
# or HADR configuration in master/slave configuration.
# Multi partition is supported as well.
#
# Copyright (c) 2011 Holger Teutsch <holger.teutsch@web.de>
#
# This agent incoporates code of a previous release created by
# Alan Robertson and the community.
#
# 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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#######################################################################
# Initialization:
> ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs
#######################################################################
db2_usage() {
echo "db2 start|stop|monitor|promote|demote|notify|validate-all|meta-data"
}
db2_meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="db2">
<version>1.0</version>
<longdesc lang="en">
Resource Agent that manages an IBM DB2 LUW databases in Standard role as primitive or \
in HADR roles in master/slave configuration. Multiple partitions are supported.
Standard mode:
An instance including all or selected databases is made highly available.
Configure each partition as a separate primitive resource.
HADR mode:
A single database in HADR configuration is made highly available by automating \
takeover operations. Configure a master / slave resource with notifications enabled \
and an additional monitoring operation with role "Master".
In case of HADR be very deliberate in specifying intervals/timeouts. The detection of \
a failure including promote must complete within HADR_PEER_WINDOW.
In addition to honoring requirements for crash recovery etc. for your specific \
database use the following relations as guidance:
"monitor interval" < HADR_PEER_WINDOW - (appr 30 sec)
"promote timeout" < HADR_PEER_WINDOW + (appr 20 sec)
For further information and examples consult \
http://www.linux-ha.org/wiki/db2_(resource_agent) </longdesc>
<shortdesc lang="en">Resource Agent that manages an IBM DB2 LUW databases in Standard \
role as primitive or in HADR roles as master/slave configuration. Multiple partitions \
are supported.</shortdesc>
<parameters>
<parameter name="instance" unique="1" required="1">
<longdesc lang="en">
The instance of the database(s).
</longdesc>
<shortdesc lang="en">instance</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="dblist" unique="0" required="0">
<longdesc lang="en">
List of databases to be managed, e.g "db1 db2".
Defaults to all databases in the instance. Specify one db for HADR mode.
</longdesc>
<shortdesc lang="en">List of databases to be managed</shortdesc>
<content type="string"/>
</parameter>
<parameter name="admin" unique="0" required="0">
<longdesc lang="en">
DEPRECATED: The admin user of the instance.
</longdesc>
<shortdesc lang="en">DEPRECATED: admin</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="dbpartitionnum" unique="0" required="0">
<longdesc lang="en">
The number of the partion (DBPARTITIONNUM) to be managed.
</longdesc>
<shortdesc lang="en">database partition number (DBPARTITIONNUM)</shortdesc>
<content type="string" default="0" />
</parameter>
</parameters>
<actions>
<action name="start" timeout="120"/>
<action name="stop" timeout="120"/>
<action name="promote" timeout="120"/>
<action name="demote" timeout="120"/>
<action name="notify" timeout="10"/>
<action name="monitor" depth="0" timeout="60" interval="20"/>
<action name="monitor" depth="0" timeout="60" role="Master" interval="22"/>
<action name="validate-all" timeout="5"/>
<action name="meta-data" timeout="5"/>
</actions>
</resource-agent>
END
}
#
# validate
# .. and set global variables
#
# exit on error
#
db2_validate() {
local db2home db2sql db2instance
# check required instance vars
if [ -z "$OCF_RESKEY_instance" ]
then
ocf_log err "DB2 required parameter instance is not set!"
return $OCF_ERR_CONFIGURED
fi
instance=$OCF_RESKEY_instance
if [ -n "$OCF_RESKEY_admin" ]
then
ocf_log warn "DB2 deprecated parameter admin is set, using $OCF_RESKEY_admin \
as instance." instance=$OCF_RESKEY_admin
fi
db2node=${OCF_RESKEY_dbpartitionnum:-0}
db2home=$(sh -c "echo ~$instance")
db2sql=$db2home/sqllib
db2profile=$db2sql/db2profile
db2bin=$db2sql/bin
STATE_FILE=${HA_RSCTMP}/db2-${OCF_RESOURCE_INSTANCE}.state
# Let's make sure a few important things are there...
if ! [ -d "$db2sql" -a -d "$db2bin" -a -f "$db2profile" -a \
-x "$db2profile" -a -x "$db2bin/db2" ]
then
ocf_is_probe && exit $OCF_NOT_RUNNING
ocf_log err "DB2 required directories and/or files not found"
exit $OCF_ERR_INSTALLED
fi
db2instance=$(runasdb2 'echo $DB2INSTANCE')
if [ "$db2instance" != "$instance" ]
then
ocf_is_probe && exit $OCF_NOT_RUNNING
ocf_log err "DB2 parameter instance \"$instance\" != DB2INSTANCE \
\"$db2instance\"" exit $OCF_ERR_CONFIGURED
fi
# enough checking for stop to succeed
[ $__OCF_ACTION = stop ] && return $OCF_SUCCESS
dblist=$OCF_RESKEY_dblist
if [ -n "$dblist" ]
then
# support , as separator as well
dblist=$(echo "$dblist" | sed -e 's/[,]/ /g')
else
if ! dblist=$(db2_dblist)
then
ocf_log err "DB2 $instance($db2node): cannot retrieve db directory"
exit $OCF_ERR_INSTALLED
fi
fi
# check requirements for the HADR case
if ocf_is_ms
then
set -- $dblist
if [ $# != 1 ]
then
ocf_log err "DB2 resource $OCF_RESOURCE_INSTANCE must have exactly one \
name in dblist" exit $OCF_ERR_CONFIGURED
fi
if [ $db2node != 0 ]
then
ocf_log err "DB2 resource $OCF_RESOURCE_INSTANCE must have \
dbpartitionnum=0" exit $OCF_ERR_CONFIGURED
fi
fi
return $OCF_SUCCESS
}
#
# Run the given command as db2 instance user
#
runasdb2() {
su $instance -c ". $db2profile; $*"
}
#
# Run a command as the DB2 admin, and log the output
#
logasdb2() {
local output rc
output=$(runasdb2 $*)
rc=$?
if [ $rc -eq 0 ]
then
ocf_log info "$output"
else
ocf_log err "$output"
fi
return $rc
}
#
# maintain the fal (first active log) attribute
# db2_fal_attrib DB {set val|get}
#
db2_fal_attrib() {
local db=$1
local attr val rc id node member me
attr=db2hadr_${instance}_${db}_fal
case "$2" in
set)
me=$(uname -n)
# loop over all member nodes and set attribute
crm_node -l |
while read id node member
do
[ "$member" = member -a "$node" != "$me" ] || continue
crm_attribute -t nodes -l reboot --node=$node -n $attr -v "$3"
rc=$?
ocf_log info "DB2 instance $instance($db2node/$db: setting attrib for FAL \
to $FIRST_ACTIVE_LOG @ $node" [ $rc != 0 ] && break
done
;;
get)
crm_attribute -t nodes -l reboot -n $attr -G -Q 2>&1
rc=$?
if [ $rc != 0 ]
then
ocf_log warn "DB2 instance $instance($db2node/$db: can't retrieve \
attribute $attr, are you sure notifications are enabled ?" fi
;;
*)
exit $OCF_ERR_CONFIGURED
esac
return $rc
}
#
# unfortunately a first connect after a crash may need several minutes
# for some internal cleanup stuff in DB2.
# We run a connect in background so other connects (i.e. monitoring!) may proceed.
#
db2_run_connect() {
local db=$1
logasdb2 "db2 connect to $db; db2 terminate"
}
#
# get some data from the database config
# sets HADR_ROLE HADR_TIMEOUT HADR_PEER_WINDOW
#
db2_get_cfg() {
local db=$1
local output hadr_vars
output=$(runasdb2 db2 get db cfg for $db)
[ $? != 0 ] && return $OCF_ERR_GENERIC
hadr_vars=$(echo "$output" |
awk '/HADR database role/ {printf "HADR_ROLE='%s'; ", $NF;}
/HADR_TIMEOUT/ {printf "HADR_TIMEOUT='%s'; ", $NF;}
/First active log file/ {printf "FIRST_ACTIVE_LOG='%s'\n", $NF;}
/HADR_PEER_WINDOW/ {printf "HADR_PEER_WINDOW='%s'\n", $NF;}')
# sets HADR_ROLE HADR_TIMEOUT HADR_PEER_WINDOW
eval $hadr_vars
# HADR_PEER_WINDOW comes with V9 and is checked later
if [ -z "$HADR_ROLE" -o -z "$HADR_TIMEOUT" ]
then
ocf_log error "DB2 cfg values invalid for $instance($db2node)/$db: \
$hadr_vars" return $OCF_ERR_GENERIC
fi
return $OCF_SUCCESS
}
#
# return the list of databases in the instance
#
db2_dblist() {
local output
output=$(runasdb2 db2 list database directory) || return $OCF_ERR_GENERIC
echo "$output" | grep -i 'Database name.*=' | sed 's%.*= *%%'
}
#
# Delayed check of the compatibility of DB2 instance and pacemaker
# config.
# Logically this belongs to validate but certain parameters can only
# be retrieved once the instance is started.
#
db2_check_config_compatibility() {
local db=$1
local is_ms
ocf_is_ms
is_ms=$?
case "$HADR_ROLE/$is_ms" in
STANDARD/0)
ocf_log err "DB2 database $instance/$db is not in a HADR configuration but I \
am a M/S resource" exit $OCF_ERR_INSTALLED
;;
STANDARD/1)
# OK
;;
*/0)
if [ -z "$HADR_PEER_WINDOW" ]
then
ocf_log err "DB2 database $instance: release to old, need \
HADR_PEER_WINDOW (>=V9)" exit $OCF_ERR_INSTALLED
fi
;;
*/1)
ocf_log err "DB2 database $instance/$db is in a HADR configuration but I must \
be a M/S resource" esac
}
#
# Start instance and DB.
# Standard mode is through "db2 activate" in order to start in previous
# mode (Standy/Primary).
# If the database is a primary AND we can determine that the running master
# has a higher "first active log" we conclude that we come up after a crash
# an the previous Standby is now Primary.
# The db is then started as Standby.
#
# Other cases: danger of split brain, log error and do nothing.
#
db2_start() {
local output start_cmd db
if output=$(runasdb2 db2start dbpartitionnum $db2node)
then
ocf_log info "DB2 instance $instance($db2node) started: $output"
else
case $output in
*SQL1026N*)
ocf_log info "DB2 instance $instance($db2node) already running: $output"
;;
*)
ocf_log err "$output"
return $OCF_ERR_GENERIC
esac
fi
if ! db2_instance_status
then
ocf_log err "DB2 instance $instance($db2node) is not active!"
return $OCF_ERR_GENERIC
fi
[ $db2node = 0 ] || return $OCF_SUCCESS
# activate DB only on node 0
for db in $dblist
do
# sets HADR_ROLE HADR_TIMEOUT HADR_PEER_WINDOW FIRST_ACTIVE_LOG
db2_get_cfg $db || return $?
# Better late than never: can only check this when the instance is already up
db2_check_config_compatibility $db
start_cmd="db2 activate db $db"
if [ $HADR_ROLE = PRIMARY ]
then
local master_fal
# communicate our FAL to other nodes the might start concurrently
db2_fal_attrib $db set $FIRST_ACTIVE_LOG
if master_fal=$(db2_fal_attrib $db get) && [ "$master_fal" '>' \
$FIRST_ACTIVE_LOG ] then
ocf_log info "DB2 database $instance($db2node)/$db is Primary and \
outdated, starting as secondary" start_cmd="db2 start hadr on db $db as standby"
HADR_ROLE=STANDBY
fi
fi
if output=$(runasdb2 $start_cmd)
then
ocf_log info "DB2 database $instance($db2node)/$db started/activated"
[ $HADR_ROLE != STANDBY ] && db2_run_connect $db &
else
case $output in
SQL1490W*|SQL1494W*|SQL1497W*|SQL1777N*)
ocf_log info "DB2 database $instance($db2node)/$db already activated: \
$output" ;;
SQL1768N*"Reason code = \"7\""*)
ocf_log err "DB2 database $instance($db2node)/$db is a Primary and \
the Standby is down"
ocf_log err "Possible split brain ! Manual intervention required."
ocf_log err "If this DB is outdated use \"db2 start hadr on db $db as \
standby\""
ocf_log err "If this DB is the surviving primary use \"db2 start hadr \
on db $db as primary by force\""
# might be the Standby is not yet there
# might be a timing problem because "First active log" is delayed
# on the next start attempt we might succeed when FAL was advanced
# might be manual intervention is required
# ... so let pacemaker give it another try and we will succeed then
return $OCF_ERR_GENERIC
;;
*)
ocf_log err "DB2 database $instance($db2node)/$db didn't start: \
$output" return $OCF_ERR_GENERIC
esac
fi
done
# come here with success
# Even if we are a db2 Primary pacemaker requires start to end up in slave mode
echo SLAVE > $STATE_FILE
return $OCF_SUCCESS
}
#
# helper function to be spawned
# so we can detect a hang of the db2stop command
#
db2_stop_bg() {
local rc output
rc=$OCF_SUCCESS
if output=$(runasdb2 db2stop force dbpartitionnum $db2node)
then
ocf_log info "DB2 instance $instance($db2node) stopped: $output"
else
case $output in
*SQL1032N*)
#SQL1032N No start database manager command was issued
ocf_log info "$output"
;;
*)
ocf_log err "DB2 instance $instance($db2node) stop failed: $output"
rc=$OCF_ERR_GENERIC
esac
fi
return $rc
}
#
# Stop the given db2 database instance
#
db2_stop() {
local stop_timeout grace_timeout stop_bg_pid i must_kill
# remove master score
crm_master -D -l reboot
# be very early here in order to avoid stale data
rm -f $STATE_FILE
if ! db2_instance_status
then
ocf_log info "DB2 instance $instance already stopped"
return $OCF_SUCCESS
fi
stop_timeout=${OCF_RESKEY_CRM_meta_timeout:-20000}
# grace_time is 4/5 (unit is ms)
grace_timeout=$((stop_timeout/1250))
# start db2stop in background as this may hang
db2_stop_bg &
stop_bg_pid=$!
# wait for grace_timeout
i=0
while [ $i -lt $grace_timeout ]
do
kill -0 $stop_bg_pid 2>/dev/null || break;
sleep 1
i=$((i+1))
done
# collect exit status but don't hang
if kill -0 $stop_bg_pid 2>/dev/null
then
stoprc=1
kill -9 $stop_bg_pid 2>/dev/null
else
wait $stop_bg_pid
stoprc=$?
fi
must_kill=0
if [ $stoprc -ne 0 ]
then
ocf_log warn "DB2 instance $instance($db2node): db2stop failed, using \
db2nkill" must_kill=1
elif ! db2_instance_dead
then
ocf_log warn "DB2 instance $instance($db2node): db2stop indicated success but \
there a still processes, using db2nkill" must_kill=1
fi
if [ $must_kill -eq 1 ]
then
# db2nkill kills *all* partions on the node
if [ -x $db2bin/db2nkill ]
then
logasdb2 $db2bin/db2nkill $db2node
elif [ -x $db2bin/db2_kill ]
then
logasdb2 $db2bin/db2_kill
fi
# loop forever (or lrmd kills us due to timeout) until the
# instance is dead
while ! db2_instance_dead
do
ocf_log info "DB2 instance $instance($db2node): waiting for processes to \
exit" sleep 1
done
ocf_log info "DB2 instance $instance($db2node) is now dead"
fi
return $OCF_SUCCESS
}
#
# check whether `enough ´ processes for a healthy instance are up
#
db2_instance_status() {
local pscount
pscount=$(runasdb2 $db2bin/db2nps $db2node | cut -c9- | grep ' db2[^ ]' | wc -l)
test $pscount -ge 4
}
#
# is the given db2 instance dead?
#
db2_instance_dead() {
local pscount
pscount=$(runasdb2 $db2bin/db2nps $db2node | cut -c9- | grep ' db2[^ ]' | wc -l)
test $pscount -eq 0
}
#
# return the status of the db as "Role/Status"
# e.g. Primary/Peer, Standby/RemoteCatchupPending
#
# If not in HADR configuration return "Standard/Standalone"
#
db2_hadr_status() {
local db=$1
local output
output=$(runasdb2 db2pd -hadr -db $db)
if [ $? != 0 ]
then
echo "Down/Off"
return 1
fi
echo "$output" |
awk '/^HADR is not active/ {print "Standard/Standalone"; exit; }
/^Role *State */ {getline; printf "%s/%s\n", $1, $2; exit; }'
}
#
# Monitor the db
# And as side effect set crm_master / FAL attribute
#
db2_monitor() {
local CMD output hadr db
if ! db2_instance_status
then
# instance is dead remove master score
crm_master -D -l reboot
exit $OCF_NOT_RUNNING
fi
[ $db2node = 0 ] || return 0
# monitoring only for partition 0
for db in $dblist
do
hadr=$(db2_hadr_status $db) || return $OCF_ERR_GENERIC
ocf_log debug "Monitor: DB2 database $instance($db2node)/$db has HADR status \
$hadr"
# set master preference accordingly
case "$hadr" in
Primary/*|Standard/*)
# perform a basic health check
CMD="if db2 connect to $db;
then
db2 select \* from sysibm.sysversions ; rc=\$?;
db2 terminate;
else
rc=\$?;
fi;
exit \$rc"
if ! output=$(runasdb2 $CMD)
then
case "$output" in
SQL1776N*)
# can't connect/select on standby, may be spurious turing \
takeover ;;
*)
ocf_log err "DB2 database $instance($db2node)/$db is not working"
ocf_log err "DB2 message: $output"
# dead primary, remove master score
crm_master -D -l reboot
return $OCF_ERR_GENERIC
esac
fi
ocf_log debug "DB2 database $instance($db2node)/$db appears to be \
working" ocf_is_ms && crm_master -v 10000 -l reboot
;;
Standby/*Peer)
crm_master -v 8000 -l reboot
;;
Standby/*)
ocf_log warn "DB2 database $instance($db2node)/$db in status $hadr can \
never be promoted" crm_master -D -l reboot
;;
*)
return $OCF_ERR_GENERIC
esac
done
# everything OK, return if running as slave
grep MASTER $STATE_FILE >/dev/null 2>&1 || return $OCF_SUCCESS
return $OCF_RUNNING_MASTER
}
#
# Promote db to Primary
#
db2_promote() {
# validate ensured that dblist contains only one entry
local db=$dblist
local i hadr output force
# we run this twice as after a crash of the other node
# within HADR_TIMEOUT the status may be still reported as Peer
# although a connection no longer exists
for i in 1 2
do
hadr=$(db2_hadr_status $db) || return $OCF_ERR_GENERIC
ocf_log info "DB2 database $instance($db2node)/$db has HADR status $hadr and \
will be promoted"
case "$hadr" in
Standard/Standalone)
# this case only to keep ocf-tester happy
return $OCF_SUCCESS
;;
Primary/Peer)
# nothing to do, only update pacemaker's view
echo MASTER > $STATE_FILE
return $OCF_SUCCESS
;;
Standby/Peer)
# must take over
;;
Standby/DisconnectedPeer)
# must take over forced
force="by force peer window only"
;;
*)
return $OCF_ERR_GENERIC
esac
if output=$(runasdb2 db2 takeover hadr on db $db $force)
then
# update pacemaker's view
echo MASTER > $STATE_FILE
# turn the log so we rapidly get a new FAL
logasdb2 "db2 archive log for db $db"
return $OCF_SUCCESS
fi
case "$output" in
SQL1770N*"Reason code = \"7\""*)
# expected, HADR_TIMEOUT is now expired
# go for the second try
continue
;;
*)
ocf_log err "DB2 database $instance($db2node)/$db promote failed: \
$output" return $OCF_ERR_GENERIC
esac
done
return $OCF_ERR_GENERIC
}
#
# Demote db to standby
#
db2_demote() {
# validate ensured that dblist contains only one entry
local db=$dblist
local hadr
# house keeping, set pacemaker's view to slave
echo SLAVE > $STATE_FILE
hadr=$(db2_hadr_status $dblist) || return $OCF_ERR_GENERIC
ocf_log info "DB2 database $instance($db2node)/$db has HADR status $hadr and will \
be demoted"
db2_monitor
return $?
}
#
# handle pre start notification
# We record our first active log on the other nodes.
# If two primaries come up after a crash they can safely determine who is
# the outdated one.
#
db2_notify() {
local node
# only interested in pre-start
[ $OCF_RESKEY_CRM_meta_notify_type = pre \
-a $OCF_RESKEY_CRM_meta_notify_operation = start ] || return $OCF_SUCESS
# gets FIRST_ACTIVE_LOG
db2_get_cfg $dblist || return $?
db2_fal_attrib $dblist set $FIRST_ACTIVE_LOG || return $OCF_ERR_GENERIC
exit $OCF_SUCCESS
}
########
# Main #
########
case "$__OCF_ACTION" in
meta-data)
db2_meta_data
exit $OCF_SUCCESS
;;
usage)
db2_usage
exit $OCF_SUCCESS
;;
start)
db2_validate
db2_start || exit $?
db2_monitor
exit $?
;;
stop)
db2_validate
db2_stop
exit $?
;;
promote)
db2_validate
db2_promote
exit $?
;;
demote)
db2_validate
db2_demote
exit $?
;;
notify)
db2_validate
db2_notify
exit $?
;;
monitor)
db2_validate
db2_monitor
exit $?
;;
validate-all)
db2_validate
exit $?
;;
*)
db2_usage
exit $OCF_ERR_UNIMPLEMENTED
esac
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