Vvc: /* Pacemaker management */

2011-04-23T18:27:21Z

Pacemaker management

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__TOC__
Pacemaker [http://www.clusterlabs.org/rpm/epel-5 repository]

=== Cluster ===
{| border="1" cellpadding="5" cellspacing="0"
| c20 || node ip || 10.10.10.20
|-
| || crossover || 10.0.0.1
|-
| c21 || node ip || 10.10.10.21
|-
| || crossover || 10.0.0.2
|-
| cl1 || virt ip|| 10.10.10.22
|-
| /u00 || FS ||/dev/drbd/by-res/u00
|-
| cl2 || virt ip || 10.10.10.23
|-
| /u01 || FS || /dev/drbd/by-res/u01
|}

===Cluster stack===
You can use either Heartbeat or Corosync, make sure only one is enabled during startup

I suggest to change default priorities for the corosync service
sed -i -e 's/.*chkconfig:.*/# chkconfig: 345 99 00/' /etc/rc.d/init.d/corosync
chkconfig corosync resetpriorities

==== Heartbeat ====
* /etc/ha.d/ha.cf
<pre>
# Logging
debug 1
use_logd false
logfacility daemon

# Misc Options
traditional_compression off
compression bz2
coredumps true

# Communications
udpport 694
bcast eth1 eth0
node c20
node c21

# Thresholds (in seconds)
keepalive 1
warntime 6
deadtime 10
initdead 30

pacemaker respawn
</pre>

* /etc/ha.d/authkeys
<pre>
auth 1
1 sha1 SecretCode
</pre>

* fix permissions
chmod 400 /etc/ha.d/authkeys

* populate heartbeat configuration to c21
[root@c21 ~]# rsync -av c20:/etc/ha.d/ /etc/ha.d/

* start heartbeat daemon on both nodes
service heartbeat start

==== Corosync ====
* generate secure key
corosync-keygen

* create config file '''/etc/corosync/corosync.conf''' on c20
When you have multiple interfaces, separate port numbers by 2, corosync uses port N and N-1

<pre>
compatibility: none

aisexec {
user: root
group: root
}

service {
name: pacemaker
clustername: chepkov
ver: 0
}

totem {
version: 2
token: 5000
token_retransmits_before_loss_const: 20
join: 1000
consensus: 11000
vsftype: none
max_messages: 20
secauth: on
threads: 0
clear_node_high_bit: yes
rrp_mode: passive
interface {
ringnumber: 0
broadcast: yes
bindnetaddr: 10.0.0.0
mcastport: 5405
}
interface {
ringnumber: 1
broadcast: yes
bindnetaddr: 10.10.10.0
mcastport: 5407
}
}

logging {
fileline: off
to_stderr: no
to_syslog: yes
debug: off
timestamp: on
}

amf {
mode: disabled
}

</pre>

* populate corosync configuration to c21
[root@c21 ~]# rsync -av c20:/etc/corosync/ /etc/corosync/

* start corosync daemon on both nodes
service corosync start

==Pacemaker config ==
=== Set default cluster options===
<pre>
[root@c20 ~]# crm configure
property no-quorum-policy=ignore
property stonith-enabled=false
property default-resource-stickiness=1000
property dc-deadtime=2min
property default-action-timeout=120s
property shutdown-escalation=5min
property cluster-recheck-interval=10min
property start-failure-is-fatal=false
property pe-error-series-max=1000
property pe-input-series-max=1000
property pe-warn-series-max=1000
rsc_defaults failure-timeout=10min
commit
bye
</pre>

===Configure drbd resources===
<pre>
[root@c20 ~]# crm configure
primitive drbd_u00 ocf:linbit:drbd params drbd_resource="u00" \
op start timeout="240" \
op monitor interval="59s" role="Master" timeout="30s" \
op monitor interval="60s" role="Slave" timeout="30s"
primitive drbd_u01 ocf:linbit:drbd params drbd_resource="u01" \
op start timeout="240" \
op monitor interval="59s" role="Master" timeout="30s" \
op monitor interval="60s" role="Slave" timeout="30s"
ms ms_drbd_u00 drbd_u00 \
meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
ms ms_drbd_u01 drbd_u01 \
meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
commit
bye
</pre>

=== Configure filesystems ===
<pre>
[root@c20 ~]# crm configure
primitive fs_u00 ocf:heartbeat:Filesystem \
params device="/dev/drbd/by-res/u00" directory="/u00" fstype="ext3" options="noatime"
primitive fs_u01 ocf:heartbeat:Filesystem \
params device="/dev/drbd/by-res/u01" directory="/u01" fstype="ext3" options="noatime"
colocation col_u00 inf: fs_u00 ms_drbd_u00:Master
colocation col_u01 inf: fs_u01 ms_drbd_u01:Master
order fs_after_drbd_u00 inf: ms_drbd_u00:promote fs_u00:start
order fs_after_drbd_u01 inf: ms_drbd_u01:promote fs_u01:start
commit
bye
</pre>

===Configure IP===
<pre>
[root@c20 ~]# crm configure
primitive ip_rg0 ocf:heartbeat:IPaddr2 params nic="eth0" ip="10.10.10.22" cidr_netmask="32"
primitive ip_rg1 ocf:heartbeat:IPaddr2 params nic="eth0" ip="10.10.10.23" cidr_netmask="32"
commit
bye
</pre>

===Configure apache===
<pre>
[root@c20 ~]# crm configure
primitive apache_rg0 ocf:heartbeat:apache \
params configfile="/u00/apache/conf/httpd.conf" \
statusurl="http://cl1.chepkov.lan/server-status" \
op monitor interval="2min" \
meta target-role="stopped"
primitive apache_rg1 ocf:heartbeat:apache \
params configfile="/u01/apache/conf/httpd.conf" \
statusurl="http://cl2.chepkov.lan/server-status" \
op monitor interval="2min" \
meta target-role="stopped"
commit
bye
</pre>

===Create groups of resources and their preferred location===
<pre>
[root@c20 ~]# crm configure
group rg0 fs_u00 ip_rg0 apache_rg0
group rg1 fs_u01 ip_rg1 apache_rg1
location rg0_on_c20 rg0 100: c20.chepkov.lan
location rg1_on_c21 rg1 100: c21.chepkov.lan
commit
bye
</pre>

===Start apache===
crm resource start apache_rg0
crm resource start apache_rg1

===Define ping constraints===

We don't want to run any service if default router is unreachable.

<pre>
# crm configure
primitive ping ocf:pacemaker:ping \
params name="pingd" host_list="10.10.10.250" multiplier="200" timeout="5" \
op monitor interval="10"

clone connected ping \
meta globally-unique="false"

location rg0-connected rg0 \
rule -inf: not_defined pingd or pingd lte 0

location rg1-connected rg1 \
rule -inf: not_defined pingd or pingd lte 0

commit
bye
</pre>

==Pacemaker management==
* Stop all resources
crm configure property stop-all-resources=true

* increase number of lrmd children
/usr/sbin/lrmadmin -p max-children 10

[[Category:Linux]]

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Vvc: /* Pacemaker management */