Kubernetes DaemonSet: Monitoring in Kubernetes

That's why it makes sense to collect logs from every node and send them to some sort of central location outside the Kubernetes cluster for persistence and later analysis.
A DaemonSet in Kubernetes is a specific kind of workload controller that ensures a copy of a pod runs on either all or some specified nodes within the cluster.
While a Deployment ensures that a specified number of pod replicas run and are available across the nodes, a DaemonSet makes sure that a copy of a pod runs on all nodes in the cluster.
By deploying a monitoring agent via DaemonSet, you can guarantee that every node in your cluster is equipped with the tools necessary for monitoring its performance and health.
When a node is removed from the cluster, the DaemonSet ensures that the associated monitoring tools are also cleanly removed, keeping your cluster neat and efficient.
In essence, Kubernetes DaemonSets simplify the process of maintaining a high level of operational awareness across all nodes.
They provide a hands-off, automated solution that ensures no node goes unmonitored, enhancing the reliability and performance of Kubernetes clusters.
This makes DaemonSets an indispensable tool in the arsenal of Kubernetes cluster administrators, particularly for tasks like node-level monitoring that require uniform deployment across all nodes.
If a matching pod doesn't exist on the monitored node, the DaemonSet controller will create one for you.
By default, the DaemonSet creates pods on all nodes.
You can use the node selector to limit the number of nodes it can accept.
The DaemonSet controller will only create pods on nodes that match the YAML file's preset nodeSelector field.
When a node is removed, Kubernetes automatically garbage-collects that pod.
As you already know, DaemonSets are a Kubernetes feature that allows you to deploy a pod on every node in your cluster.
Well, each node in your Kubernetes cluster can be involved in different kinds of network activities.
By deploying a monitoring agent on every node, you get a comprehensive view of what's happening across your entire cluster.
Accurate and localized data: By having a monitoring agent on each node, you get precise, localized data about the traffic.
As nodes are added or removed, the DaemonSet automatically adjusts, deploying or removing pods as needed.
They empower you to maintain a high-performing and secure Kubernetes environment by providing a bird's-eye view of your network traffic, node by node.
Collector: A DaemonSet pod responsible for monitoring network traffic on nodes.


This Cyber News was published on feeds.dzone.com. Publication date: Mon, 04 Dec 2023 13:13:04 +0000


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