guide to 
 building agents Contents What is an agent? 4 When should you build an agent? 5 Agent design foundations 7 Guardrails 24 Conclusion 32 2 Practical guide to building agents Introduction Large new category of LLM-powered systems known as agents. This guide is designed for product and engineering teams exploring how to build their first agents, distilling insights from numerous customer deployments cases, clear patterns for designing agent logic and orchestration, and best practices to ensure your agents run safely, predictably, 
 and effectively. After reading this guide, you’ll have the foundational

fetch answers, summarize text, or mimic conversation – but always in a reactive, limited frame. AI agents represent a step-change forward. These are intelligent long-running processes that can reason, set of utilities – AI agents are turning conversational interfaces into functional infrastructure. Whereas early assistants needed clear inputs and produced narrow outputs, agents promise to operate with about accomplishing. While we are early in the development of these agents, the implications are just starting to emerge. AI agents could reshape how users interact with digital systems – from customer

ubuntu-ha-introduction Introduction 3 ubuntu-ha-pacemaker-resource-agents Pacemaker - resource agents 3 ubuntu-ha-pacemaker-fence-agents Pacemaker - fence agents 3 ubuntu-ha-drbd Distributed Replicated Block Device uses a Mail User Agent (MUA), or email client, to send the message through one or more Mail Transfer Agents (MTA), the last of which will hand it off to a Mail Delivery Agent (MDA) for delivery to the recipient’s Certificates CA trust store Console High Availability Introduction Pacemaker - resource agents Pacemaker - fence agents Distributed Replicated Block Device (DRBD) Ubuntu HA - Migrate from crmsh to pcs Databases

software. Discovery contains instructions for setting up automatic discovery of network devices, active agents, file systems, network inter- faces, etc. Distributed monitoring deals with the possibilities of • custom checks • gathering desired data at custom intervals • performed by server/proxy and by agents Flexible threshold definitions • you can define very flexible problem thresholds, called triggers responsibilities of which are outlined below. Server Zabbix server is the central component to which agents report availability and integrity information and statistics. The server is the central repository

software. Discovery contains instructions for setting up automatic discovery of network devices, active agents, file systems, network inter- faces, etc. Distributed monitoring deals with the possibilities of • custom checks • gathering desired data at custom intervals • performed by server/proxy and by agents Flexible threshold definitions • you can define very flexible problem thresholds, called triggers responsibilities of which are outlined below. Server Zabbix server is the central component to which agents report availability and integrity information and statistics. The server is the central repository

software. Discovery contains instructions for setting up automatic discovery of network devices, active agents, file systems, network inter- faces, etc. Distributed monitoring deals with the possibilities of • custom checks • gathering desired data at custom intervals • performed by server/proxy and by agents Flexible threshold definitions • you can define very flexible problem thresholds, called triggers responsibilities of which are outlined below. Server 6 Zabbix server is the central component to which agents report availability and integrity information and statistics. The server is the central repository

software. Discovery contains instructions for setting up automatic discovery of network devices, active agents, file systems, network inter- faces, etc. Distributed monitoring deals with the possibilities of • custom checks • gathering desired data at custom intervals • performed by server/proxy and by agents Flexible threshold definitions • you can define very flexible problem thresholds, called triggers responsibilities of which are outlined below. Server Zabbix server is the central component to which agents report availability and integrity information and statistics. The server is the central repository

software. Discovery contains instructions for setting up automatic discovery of network devices, active agents, file systems, network inter- faces, etc. Distributed monitoring deals with the possibilities of • custom checks • gathering desired data at custom intervals • performed by server/proxy and by agents Flexible threshold definitions • you can define very flexible problem thresholds, called triggers responsibilities of which are outlined below. Server Zabbix server is the central component to which agents report availability and integrity information and statistics. The server is the central repository

software. Discovery contains instructions for setting up automatic discovery of network devices, active agents, file systems, network inter- faces, etc. Distributed monitoring deals with the possibilities of • custom checks • gathering desired data at custom intervals • performed by server/proxy and by agents Flexible threshold definitions • you can define very flexible problem thresholds, called triggers responsibilities of which are outlined below. Server Zabbix server is the central component to which agents report availability and integrity information and statistics. The server is the central repository