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Tweak glossary definition for Node (#14317)
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* Tweak glossary definition for Node

The services (eg kubelet) that run on a Node are not the kind of
Service that the Kubernetes API knows about. Reword accordingly.

Also, highlight that Docker is one container runtime and that
there are others.

* Adopt suggestions from #14523

Co-Authored-By: Rael Garcia <[email protected]>
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2 people authored and k8s-ci-robot committed Jun 4, 2019
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3 changes: 1 addition & 2 deletions content/en/docs/reference/glossary/node.md
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<!--more-->

A worker machine may be a VM or physical machine, depending on the cluster. It has the {{< glossary_tooltip text="Services" term_id="service" >}} necessary to run {{< glossary_tooltip text="Pods" term_id="pod" >}} and is managed by the master components. The {{< glossary_tooltip text="Services" term_id="service" >}} on a node include Docker, kubelet and kube-proxy.

A worker node may be a VM or physical machine, depending on the cluster. It has local daemons or services necessary to run {{< glossary_tooltip text="Pods" term_id="pod" >}} and is managed by the control plane. The daemons on a node include {{< glossary_tooltip text="kubelet" term_id="kubelet" >}}, {{< glossary_tooltip text="kube-proxy" term_id="kube-proxy" >}}, and a container runtime implementing the {{< glossary_tooltip text="CRI" term_id="cri" >}} such as {{< glossary_tooltip term_id="docker" >}}.

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