Messaging Solutions in a Linux Environment

176 Messaging Solutions in a Linux Environment

Figure 5-14 Scenario three under normal operation

For WebSphere MQ high availability to work in this scenario, the following

configurations are required on both brk1 and brk2.

1. We will again be using the MQ scripts that were discussed earlier in “Shell

scripts to manage MQ resources” on page 80. Make these scripts available

on the hosts brk1 and brk2. In addition, copy the script mqsMod.pl to

/etc/ha.d/resource.d.

2. Because the heartbeat software is already installed and configured on the

hosts brk1 and brk2 for scenario two, we only need to make slight

modifications to the setup. Refer to 4.2.3, “Configuring Linux-HA” on

page 125 for complete configuration of linux-ha.

3. Modify the etc/ha.d/haresources file on both brk1 and brk2 to include the

start and stop for the queue managers. Also there is no need to include the

ServeRAID failover script (see Example 4-9 on page 136) because both

machines have simultaneous access to the shared fiber enclosure. See

Example 5-14 for the final version of this configuration file.

Example 5-14 /etc/ha.d/haresources

brk1 IPaddr::192.168.10.201/24 mqsMod.pl::/var/mqm/::primary

brk2 IPaddr::192.168.10.202/24 mqsMod.pl::/var/mqm/::secondary

5.3.10 HA configuration summary

In summary, our high availability configuration works as shown in Table 5-2 on

page 177.

brk1

qmgr4

brk2

qmgr5

HeartBeat

/var/mqm/qmgrs/qmgr4

/var/mqm/qmgrs/qmgr5

/var/mqm/log/qmgr4

/var/mqm/log/qmgr5