Many deployments require the ability to distribute some workload to be executed on hosts other than the Domain Orchestrator. Some types of workload can be executed on a remote host without an agent being installed on it. However, more functionality is available when a CA Process Automation agent is installed on the target host.
Each process instance consists of one or more operators. Each operator is targeted to run on a specific host, either directly, or indirectly using the concept of touchpoints. Each touchpoint is mapped to a specific host through system configuration.
The same touchpoint name can map to different hosts in different CA Process Automation domains or environments. Thus, touchpoints allow the same process content to be deployed unaltered in different CA Process Automation domains or environments.
Touchpoints can map to a CA Process Automation Orchestrator or a CA Process Automation agent. Proxy touchpoints map to a remote host with no CA Process Automation software on it. Orchestrators can distribute workload to a remote host by connecting to it directly over SSH, or connecting through an agent, that in turn connects to the remote host over SSH.
Like a touchpoint, a proxy touchpoint is a logical entity. It is a name that can be used in the process designer to specify an operator execution target. While a touchpoint is defined and mapped to a specific agent through environment configuration, a proxy touchpoint is mapped to a specific agentless remote host. Each agentless remote host (mapped to a proxy touchpoint) is managed by an agent installed on a different host. When an Orchestrator distributes work that is targeting a proxy touchpoint, it sends the work to the agent that manages the remote host, and that agent in turn establishes an SSH session to the remote host to execute the work.
Consequently, the primary task of a CA Process Automation agent is to execute workload on the host on which it is installed. Additionally, agents can act as a gateway through which workload is distributed to remote hosts on which you cannot install an agent.
|
Copyright © 2014 CA.
All rights reserved.
|
|