DevOps in the era of Cloud Computing


As mentioned in the last Post, deployment is a very tricky thing in the Cloud. It can be easy if you run your applications on a PaaS-Service. However, it might be tricky in IaaS Environments. There is mostly a need for an Operations-Team that takes care of deployment and maintains the Application for failures. In DevOps Environments, we often see the following: Dev: „It‘s not my Code, it is your machines!“ Ops: „It‘s not my machines, it is your Code!“ This means that there are often problems between the two teams. The Development Teams finger-point at the Operations Team and vice versa. Flickr gave some best practices on how to overcome this issue. These Reccomendations are divided into two main points: Right Tools Culture Right Tools consists of the following recommendations: Automated Infrastructure This consists of different tools such as Puppet for IT Automation, Cobbler for Automated Installation, CFengine for Configuration Management or other Tools Shared Version Control One-Step Build All Build

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Challenges for Large-Scale Cloud Computing Deployment


Large Applications such as Amazon, Google, eBay, Facebook and other large Websites have problems when it comes to deploying their Applications. Often, there are some 10,000 servers or even more of them when a new Version needs to be deployed. In Cloud Platforms, we often have similar issues. Even if we need to deploy to 100 instances, it might be difficult to get everything correct. There is a significant difference between PaaS (Platform as a Service) and IaaS (Infrastructure as a Service) Applications. If we use IaaS, we have to take care of deployment. Each instance needs to have the newest Version. There are different tools available to automate that task or you either write your own tool for that. If you use PaaS, it is easy since most platforms (such as Google App Engine and Windows Azure) usually take care of that. There are several issues and challenges if you use IaaS Platforms to run your applications: You have

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