By David Greenberg
How can Apache Mesos make a distinction on your association? With this useful advisor, you will learn the way this cluster supervisor directs your datacenter's assets, and gives actual time APIs for interacting with (and constructing for) the whole cluster. you are going to the way to use Mesos as a deployment method, like Ansible or Chef, and as an execution platform for construction and internet hosting higher-level functions, like Hadoop. writer David Greenberg exhibits you ways Mesos manages all your datacenter as a unmarried logical entity, taking out the necessity to assign fastened units of machines to functions. you are going to speedy observe why Mesos is the final word DevOps software.
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Extra resources for Building Applications on Mesos: Leveraging Resilient, Scalable, and Distributed Systems
Rather than building everything from first principles, however, let’s take a look how to utilize existing frameworks to port our legacy applications. When we think about most applications, they typically fall into two categories: applications that respond to requests and appli‐ cations that do actions at a particular time. In the LAMP stack, these two components are PHP and cron jobs. First, we’re going to look at how to move an existing HTTP-based application from your current infrastructure onto Mesos.
Unfortu‐ nately, that in turn means that occasionally the executor APIs can be difficult to understand, since they see less use. info CommandExecutor Most users and developers don’t need to leverage the sophisticated features of the Mesos executor APIs. To assist rapid and reliable application development, Mesos comes with the CommandExecutor, which is a special, simplified executor. If your task simply launches a command-line application (and optionally downloads it from a location in storage) or a Docker image, you can specify a CommandInfo when launch‐ ing a task, rather than an ExecutorInfo.
3. Every one of the slaves has its host volume mounted on the same path (luckily, this is the easiest part). If you feel up to the task, this can help you to get certain types of databases running on Marathon. Sadly, you won’t have scaling or automatic recovery handled for you, since there’s so much special configuration necessary on each slave. Happily, as Mesos adds support for persistent disks, more and more specialized frameworks that handle launching and configuring databases will pop up, and this mess will no longer be needed.
Building Applications on Mesos: Leveraging Resilient, Scalable, and Distributed Systems by David Greenberg