Setting up Liberty server clusters
A Liberty can be configured into a server cluster for application high availability and scale.
The collectiveController-1.0
feature and its
capabilities are available only in multiple-server products such as WebSphere® Application Server Network Deployment Liberty and WebSphere Application Server for z/OS® Liberty. The feature is not available in
single-server products such as WebSphere Application Server Liberty, or
WebSphere Application Server Liberty Core. If you have a multiple-server
product installation, you can use its collectiveController-1.0
feature to work with
collective members from single-server products.
collectiveController-1.0
feature supports several
operations on Liberty server clusters through
the ClusterManager
MBean:- List clusters
- Start cluster
- Stop cluster
- List cluster members
- Generate cluster plug-in configuration
To be part of a server cluster, a Liberty
must be a member of a Liberty collective and
also be configured with the clusterMember
feature.
A collective member can be a member of only one server cluster. All cluster members must be members of the same collective. Multiple server clusters can be configured within the same collective. The following diagram illustrates these relationships.