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params ip=1.2.3.4
crm(live)configure# primitive Email lsb:exim
3
Group the primitives with their relevant identifiers in the correct order:
crm(live)configure# group shortcut Public-IP Email
5.12 Configuring a Clone Resource
Clones were initially conceived as a convenient way to start N instances of an IP resource
and have them distributed throughout the cluster for load balancing. They have turned
out to quite useful for a number of other purposes, including integrating with DLM,
the fencing subsystem and OCFS2. You can clone any resource, provided the resource
agent supports it.
These types of cloned resources exist:
Anonymous Resources
Anonymous clones are the simplest type. These resources behave completely
identically wherever they are running. Because of this, there can only be one copy
of an anonymous clone active per machine.
Multi-State Resources
Multi-state resources are a specialization of clones. They allow the instances to be
in on of two operating modes. These modes are called “master” and “slave” but
can mean whatever you wish them to mean. The only limitation is that when an
instance is started, it must come up in a slave state.
5.12.1 Creating Anonymous Clone Resources
To create an anonymouse clone resource, first create a primitive resource and then refer
to it with the
clone
command. Do the following:
1
Run the
crm
command as system administrator. The prompt changes to
crm(live)
.
2 Configure the primitive, for example:
Configuring Cluster Resources From Command Line 71