6.2. Configuring High Availability Deployments
The
broker, msgserver, and datastore roles can be deployed in high availability (HA) configurations.
6.2.1. Configuring a High Availability Broker
Broker clustering is accomplished using an external load balancer in front of an arbitrary number of broker instances. This allows the broker and Management Console applications to achieve high availability. These applications do not require session affinity; round-robin load balancing is sufficient.
See the OpenShift Enterprise Deployment Guide [11] for additional information on broker redundancy.
The following are the variations that you must make to your basic configurations.
Example 6.3. Non-broker Host Configuration
class { 'openshift_origin' :
# Other settings as appropriate per above examples
...
# Use the *virtual* broker info for these values on hosts that are not Brokers
broker_hostname => 'virtbroker.openshift.local',
broker_ip_addr => '10.10.20.250',
...
}
Example 6.4. Broker Host Configuration
class { 'openshift_origin' :
# Other settings as appropriate per above examples
...
# Use the actual target host info for these values on hosts that are Brokers
broker_hostname => <target_hostname>,
broker_ip_addr => <target_ip_addr>,
# Provide the cluster info
broker_virtual_hostname => 'virtbroker.openshift.local',
broker_virtual_ip_address => '10.10.20.250',
...
}
Example 6.5. Name Server Configuration
If OpenShift Enterprise is also handling DNS, add the following information to the host where you are deploying the
nameserver role:
class { 'openshift_origin' :
# Other settings as appropriate per above examples
...
# Use the *virtual* broker info for these values
broker_virtual_hostname => 'virtbroker.openshift.local',
broker_virtual_ip_addr => '10.10.20.250',
# Additionally if you are using this nameserver to serve the domain for
# OpenShift host systems, include the virtual host info in the infrastructure
# list:
dns_infrastructure_names =>
[
...
{ hostname => 'virtbroker.openshift.local',
ipaddr => '10.10.10.250'
},
],
...
}