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---
title: " Using Deployment objects with Kubernetes 1.2 "
date: 2016-04-01
slug: using-deployment-objects-with
url: /blog/2016/04/Using-Deployment-Objects-With
author: >
  Janet Kuo (Google) 
---
_**Editor's note:** this is the seventh post in a [series of in-depth posts](/blog/2016/03/five-days-of-kubernetes-12) on what's new in Kubernetes 1.2_  

Kubernetes has made deploying and managing applications very straightforward, with most actions a single API or command line away, including rolling out new applications, canary testing and upgrading. So why would we need Deployments?  

Deployment objects automate deploying and rolling updating applications. Compared with kubectl rolling-update, Deployment API is much faster, is declarative, is implemented server-side and has more features (for example, you can rollback to any previous revision even after the rolling update is done).  

 In today’s blogpost, we’ll cover how to use Deployments to:  

1. Deploy/rollout an application
2. Update the application declaratively and progressively, without a service outage
3. Rollback to a previous revision, if something’s wrong when you’re deploying/updating the application

[
](https://4.bp.blogspot.com/-M9Xc21XYtLA/Vv7ImzURFxI/AAAAAAAACg0/jlHU3nJ-qYwC74DMiD-joaDPqQfebj3-g/s1600/image03.gif)

Without further ado, let’s start playing around with Deployments!  


### Getting started
If you want to try this example, basically you’ll need 3 things:  

1. **A running Kubernetes cluster** : If you don’t already have one, check the [Getting Started guides](/docs/getting-started-guides/) for a list of solutions on a range of platforms, from your laptop, to VMs on a cloud provider, to a rack of bare metal servers.
2. **Kubectl, the Kubernetes CLI** : If you see a URL response after running kubectl cluster-info, you’re ready to go. Otherwise, follow the [instructions](/docs/user-guide/prereqs/) to install and configure kubectl; or the [instructions for hosted solutions](https://cloud.google.com/container-engine/docs/before-you-begin) if you have a Google Container Engine cluster.
Title: Introduction to Kubernetes Deployments
Summary
This blog post introduces Kubernetes Deployment objects, which automate application deployment and rolling updates. It highlights the advantages of Deployments over `kubectl rolling-update`, such as speed, declarative configuration, server-side implementation, and rollback capabilities. The post will cover deploying applications, updating them declaratively and progressively, and rolling back to previous revisions.