High availability agents

Agents communicate with the server over JMS and HTTP/HTTPS. These modes of communication are handled differently in a high availability scenario.

JMS communication

JMS communications is subscription-based. All agents subscribe to all topics and filter the list with their agent ID (which is one reason that agents should have unique IDs).

For JMS-based communications, agents can be configured in several ways:

Approach 2 is optimal because workloads are distributed randomly and transparently. If a server cannot keep up with the workload, work is queued and no additional configuration is required.

HTTP/HTTPS communication

HTTP/HTTPS server-agent communications are handled by a standard load balancer. Authentication is run on every request; any server can run validation for any request.

In case of server failure, user-server authentication must be redone unless the ‘remember me’ cookie is used.


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