# Setup Addons ## Add-On Components Upon deploying a Kubernetes cluster, it becomes essential to install a series of add-on components (addons). These addons are often crucial for the regular operation of the cluster. The [addon-manager](/en/setup/addon-list/addon-manager.md), commonly utilized to manage the add-ons in a cluster, operates within the Kubernetes cluster's Master node. It oversees all the extensions in the `$ADDON_PATH` (defaulting to `/etc/kubernetes/addons/`) directory to ensure they are functioning as intended. Some of the common components include: * [addon-manager](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/addon-manager) * [cluster-loadbalancing](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/cluster-loadbalancing) * [dashboard](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/dashboard) * [device-plugins/nvidia-gpu](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/device-plugins/nvidia-gpu) * [dns-horizontal-autoscaler](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/dns-horizontal-autoscaler) * [dns](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/dns) * [fluentd-elasticsearch](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/fluentd-elasticsearch) * [ip-masq-agent](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/ip-masq-agent) * [istio](https://istio.io) * [kube-proxy](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/kube-proxy) * [metrics-server](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/metrics-server) * [node-problem-detector](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/node-problem-detector) * [prometheus](https://prometheus.io/) * [storage-class](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/storage-class) For additional extensions, refer to [Installing Addons](https://kubernetes.io/docs/concepts/cluster-administration/addons/) and [Legacy Addons](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons). *** ## Power-Up Your Kubernetes: Essential Add-Ons for Peak Performance Once you've got your Kubernetes cluster up and running, think of it like a smartphone without apps—it's functional, but you're not getting the most out of it. That's where add-ons come in—they're like the apps that power-up your cluster's capabilities. Picture a digital maestro—[addon-manager](/en/setup/addon-list/addon-manager.md)—nestled within the Master node of your Kubernetes command center. This wizard is keeping an eagle eye on the `$ADDON_PATH` (which, by default, is the `/etc/kubernetes/addons/` directory), ensuring every component is humming along just right. Ready for the tour? Here's the all-star lineup of add-ons that can turn your cluster into a powerhouse: * **Command Central,** [**addon-manager**](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/addon-manager): Keeps your add-ons tightly regulated. * **Traffic Cop,** [**cluster-loadbalancing**](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/cluster-loadbalancing): Directs digital traffic efficiently. * **Mission Control,** [**dashboard**](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/dashboard): A clear visual on your cluster activities. * **The Muscle,** [**device-plugins/nvidia-gpu**](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/device-plugins/nvidia-gpu): Amping up your computing power. * **The Balancer,** [**dns-horizontal-autoscaler**](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/dns-horizontal-autoscaler): Keeps network naming at peak performance. * **The Communicator,** [**dns**](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/dns): For seamless service-name resolutions. * **The Analyzer,** [**fluentd-elasticsearch**](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/fluentd-elasticsearch): Dives deep into data logs. * **Stealth Mode,** [**ip-masq-agent**](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/ip-masq-agent): Keeps IP addresses under wraps. * **The Envoy,** [**istio**](https://istio.io): Smart networking for your services. * **The Enforcer,** [**kube-proxy**](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/kube-proxy): Manages network rules and connections. * **The Scout,** [**metrics-server**](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/metrics-server): Keeps an eye on resource usage. * **The Watchdog,** [**node-problem-detector**](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/node-problem-detector): On the lookout for pesky issues. * **The Statistician,** [**prometheus**](https://prometheus.io/): Monitors and alerts like a pro. * **The Organizer,** [**storage-class**](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/storage-class): Manages your storage needs efficiently. For those hungry for even more power-ups, gear up with additional extensions detailed in [Installing Addons](https://kubernetes.io/docs/concepts/cluster-administration/addons/) and for a nostalgic twist, visit [Legacy Addons](https://github.com/kubernetes/kubernetes/tree/master/cluster/addons). Your Kubernetes cluster is set for the big leagues now! --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://kubernetes.feisky.xyz/en/setup/addon-list.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. 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