JS7 JobScheduler

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Introduction

The Agent Cluster is designed to provide horizontal scalability and fail-over capabilities for Agents. Multiple Subagents are utilized across different servers to distribute the workload within the Agent Cluster, resulting in an active-active clustering setup. To ensure high availability and the ability to restart, automated fail-over mechanisms are employed in the Agent Cluster, creating an active-passive cluster configuration. The JS7 - License governs the usage of the Agent Cluster and must be followed accordingly.

Architecture

The JS7 - Agent Cluster documentation provides an in-depth explanation of the architecture. For guidance on planning Agent Clusters, refer to the JS7 - Strategies for Agent Clustering resources.

The Agent Cluster architecture comprises several facets related to clustering, which can be classified into two distinct layers:

  • The Operational Layer of the Agent Cluster architecture involves the setup and configuration of Cluster Agents. This layer handles the installation procedure, which closely resembles that of Standalone Agents. Furthermore, it involves the crucial step of registering Agents as active members within the Agent Cluster, enabling their seamless integration and participation in various cluster operations.
  • The Functional Layer defines multiple logical Subagent Clusters. These Subagent Clusters form the basis for organizing and managing the workload distribution within the Agent Cluster.

Manage Director Agent Clusters

The JS7 - Agent Installation On Premises and JS7 - Agent Installation for Containers articles explains the installation procedure that is the same for Cluster Agents and for Standalone Agents. Agent Director instances need individual license keys to be assigned, see JS7 - How to apply a JS7 License Key.

The icon in the JOC Cockpit main menu is used to select the Manage Controllers/Agents view:


This brings forward the following view:

  • The view is grouped in Controllers.
  • For each Controller separate lists of Standalone Agents and Cluster Agents are displayed.


Add Director Agent Cluster

The Agent Cluster is situated in the operational layer and includes specification of Director Agents.

To add an Director Agent Cluster users can start from the action menu of the Controller:

This brings forward the following popup window:


Explanation:

For explanation of Input fields, see JS7 - Management of Agent Clusters.

Status Of Agent Cluster

To check the Status see, JS7 - Resources - Agent Job Executions.

Switch-Over

Switch-over is an operation that is caused by user intervention in JOC Cockpit or by use of the JS7 - REST Web Service API. The switch-over procedure does not require termination of an Active Director Agent, instead it shifts the active role to the standby Director Agent.

In the JS7 - Resources - Agent Job Executions the user performs one of the operations from Cluster action menu:

  • Switch-over
  • Confirm loss of a Director instance



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