DaemonSet
A DaemonSet is a Kubernetes resource that ensures a copy of a pod runs on all (or some) nodes in a cluster, automatically deploying to new nodes as they join. It is commonly used for cluster-wide services like logging, monitoring, or storage daemons that need to be present on every node. This provides a way to manage system-level workloads that require node-specific presence.
Developers should use DaemonSets when they need to run a pod on every node in a Kubernetes cluster, such as for log collection agents (e.g., Fluentd), monitoring agents (e.g., Prometheus Node Exporter), or network plugins (e.g., Calico). It ensures high availability and consistency across nodes without manual intervention, making it ideal for infrastructure and operational tasks in distributed systems.