New parameter to configure clustering without HA

[guidograzioli]

Fix configuration for cluster topologies built with only primary servers. The ha-policy template failed to configure properly with activemq_ha_enabled and no backups; with no activemq_ha_enabled active, cluster-connections would not be generated.

New parameters:

Variable	Description	Default
activemq_cluster_enabled	Whether or not to enable clustering (cluster-connections)	{{ activemq_ha_enabled }}
activemq_scale_down_enabled	Whether or not clustering supports scale-down"	false

Fix #176

[garethahealy]

I tested against the source but found one issue related to the new activemq_cluster_enabled flag.

The below doesn't have that flag, which means activemq_cluster_nodes is never populated when using activemq_cluster_discovery=provided

• https://github.com/guidograzioli/amq/blob/live_only_clustering/roles/activemq/tasks/main.yml#L28-L33

[guidograzioli]

I tested against the source but found one issue related to the new activemq_cluster_enabled flag.

The below doesn't have that flag, which means activemq_cluster_nodes is never populated when using activemq_cluster_discovery=provided

• https://github.com/guidograzioli/amq/blob/live_only_clustering/roles/activemq/tasks/main.yml#L28-L33

OK i think it's complete now, thanks for the help. Can you review?

[garethahealy]

I've tested the latest. Got 3 clustered brokers, producing 600 messages to broker 1. Messages evenly (200 each) consumed by broker 1, 2 and 3

$ ansible-galaxy collection list | grep "middleware"
middleware_automation.amq     2.2.4
middleware_automation.common  1.2.2

[garethahealy]

/lgtm