https://support.tools/tags/agents/Recent content in Agents on Support ToolsHugoen-USMon, 18 Sep 2023 00:00:00 -0600https://support.tools/post/rancher-deep-dive/Mon, 18 Sep 2023 00:00:00 -0600https://support.tools/post/rancher-deep-dive/<p>In this blog post, we will explore Rancher, a powerful platform designed to simplify the management of Kubernetes clusters at scale. We will delve into Rancher&rsquo;s architecture, covering controllers, agents, WebSockets, the Rancher API, and the use of Custom Resource Definitions (CRDs).</p>https://support.tools/training/rancher/rancher-agents/Fri, 13 May 2022 04:04:00 +0000https://support.tools/training/rancher/rancher-agents/<h1 id="what-do-the-ranchercattle-agents-do">What do the Rancher/cattle agents do?</h1> <p>The Rancher agents are how Rancher communicates with downstream clusters. It&rsquo;s important to understand that Rancher does not create outbound connections to downstream clusters for gaining access to the Kubernetes API endpoint. This includes Rancher deployed clusters and imported clusters.</p> <p><img src="../images/rancher-architecture-rancher-api-server.svg" alt="rancher-architecture"></p> <p>There are two different agent resources deployed on Rancher managed clusters:</p> <ul> <li>cattle-cluster-agent</li> <li>cattle-node-agent</li> </ul> <h2 id="cattle-cluster-agents">cattle-cluster-agents</h2> <p>In Rancher v2.5, the cattle-cluster-agent Deployment has a single replica; in Rancher v2.6, it runs as at least two replicas for HA. When this pod starts, it creates a WebSocket connection to Ranchers API.</p>