HACMP Installation and Cluster Definition
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as the path locations for start and stop scripts for the application. These
scripts have to be in the same location on every service node.
Just as for pre- and post-events, these scripts can be adapted to specific
nodes. They don’t need to be equal in content. The system administrator has
to ensure, however, that they are in the same location, use the same name,
and are executable for the root user.
4.3.1.4 Synchronizing Cluster Resources
After defining these resources and their relationship with the resource
group, the act of synchronizing cluster resources sends the information
contained on the current node to all defined cluster nodes.
If a node attempts to join the cluster when its configuration is out-of-sync with
other active cluster nodes, it will be denied. You must ensure that other nodes
are synchronized to the joining member.
4.4 Initial Testing
After installing and configuring your cluster, it is recommended that you do
some initial testing in order to verify that the cluster is acting as it should.
4.4.1 Clverify
Running
/usr/sbin/cluster/diag/clverify
is probably a good start to the
testing. It allows you to check the software and the cluster.
Software checking is reduced to lpp checking, which is basically checking
whether HACMP-specific modifications to AIX files are correct. For
correctness of the installation itself, use the
lppcheck -v
command.
Cluster verification is divided into topology and configuration checking. These
two parts do basically the same as
smit clverify
, i.e. verifying that the
clusters topology as well as the resource configurations are in sync on the
cluster nodes.
All configured nodes must be on their boot addresses when a cluster has
been configured and the nodes are synchronized for the first time. Any
node not on its boot address will not have its /etc/rc.net
file updated with
the HACMP entry; this causes problems for the reintegration of this node
into the cluster.
Note
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