Translate glossary entry.

Author: cloud-j-luna

content/pt/docs/reference/_index.md

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+---
+title: Reference
+approvers:
+- chenopis
+linkTitle: "Reference"
+main_menu: true
+weight: 70
+content_template: templates/concept
+---
+
+{{% capture overview %}}
+
+This section of the Kubernetes documentation contains references.
+
+{{% /capture %}}
+
+{{% capture body %}}
+
+## API Reference
+
+* [Kubernetes API Overview](/docs/reference/using-api/api-overview/) - Overview of the API for Kubernetes.
+* [Kubernetes API Reference {{< latest-version >}}](/docs/reference/generated/kubernetes-api/{{< latest-version >}}/)
+
+## API Client Libraries
+
+To call the Kubernetes API from a programming language, you can use
+[client libraries](/docs/reference/using-api/client-libraries/). Officially supported
+client libraries:
+
+- [Kubernetes Go client library](https://github.com/kubernetes/client-go/)
+- [Kubernetes Python client library](https://github.com/kubernetes-client/python)
+- [Kubernetes Java client library](https://github.com/kubernetes-client/java)
+- [Kubernetes JavaScript client library](https://github.com/kubernetes-client/javascript)
+
+## CLI Reference
+
+* [kubectl](/docs/reference/kubectl/overview/) - Main CLI tool for running commands and managing Kubernetes clusters.
+    * [JSONPath](/docs/reference/kubectl/jsonpath/) - Syntax guide for using [JSONPath expressions](http://goessner.net/articles/JsonPath/) with kubectl.
+* [kubeadm](/docs/reference/setup-tools/kubeadm/kubeadm/) - CLI tool to easily provision a secure Kubernetes cluster.
+
+## Config Reference
+
+* [kubelet](/docs/reference/command-line-tools-reference/kubelet/) - The primary *node agent* that runs on each node. The kubelet takes a set of PodSpecs and ensures that the described containers are running and healthy.
+* [kube-apiserver](/docs/reference/command-line-tools-reference/kube-apiserver/) - REST API that validates and configures data for API objects such as  pods, services, replication controllers.
+* [kube-controller-manager](/docs/reference/command-line-tools-reference/kube-controller-manager/) - Daemon that embeds the core control loops shipped with Kubernetes.
+* [kube-proxy](/docs/reference/command-line-tools-reference/kube-proxy/) - Can do simple TCP/UDP stream forwarding or round-robin TCP/UDP forwarding across a set of back-ends.
+* [kube-scheduler](/docs/reference/command-line-tools-reference/kube-scheduler/) - Scheduler that manages availability, performance, and capacity.
+
+## Design Docs
+
+An archive of the design docs for Kubernetes functionality. Good starting points are [Kubernetes Architecture](https://git.k8s.io/community/contributors/design-proposals/architecture/architecture.md) and [Kubernetes Design Overview](https://git.k8s.io/community/contributors/design-proposals).
+
+{{% /capture %}}

content/pt/docs/reference/glossary/controller.md

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+---
+title: Controlador
+id: controller
+date: 2020-03-23
+full_link: /docs/concepts/architecture/controller/
+short_description: >
+  Um ciclo de controlo que observa o estado partilhado do cluster através do apiserver e efetua
+  mudanças tentando mover o estado atual em direção ao estado desejado.
+
+aka: 
+tags:
+- architecture
+- fundamental
+---
+No Kubernetes, controladores são ciclos de controlo que observam o estado do seu
+{{< glossary_tooltip term_id="cluster" text="cluster">}}, e então fazer ou requisitar
+mudanças onde necessário.
+Cada controlador tenta mover o estado atual do cluster mais perto do estado desejado.
+
+<!--more-->
+
+Controladores observam o estado partilhado do cluster através do
+{{< glossary_tooltip text="apiserver" term_id="kube-apiserver" >}} (parte do
+{{< glossary_tooltip term_id="control-plane" >}}).
+
+Alguns controladores tambem correm dentro do plano de controlo, fornecendo ciclos
+de controlo que são centrais às operações do Kubernetes. Por exemplo: o controlador
+de *deployments*, o controlador de *daemonsets*, o controlador de *namespaces*, e o 
+controlador de volumes persistentes (*persistent volumes*) (e outros) todos correm
+dentro do {{< glossary_tooltip term_id="kube-controller-manager" >}}.