By David Greenberg
How can Apache Mesos make a distinction on your association? With this functional advisor, you are going to learn the way this cluster supervisor directs your datacenter's assets, and offers genuine time APIs for interacting with (and constructing for) the full cluster. you will how to use Mesos as a deployment method, like Ansible or Chef, and as an execution platform for development and website hosting higher-level purposes, like Hadoop. writer David Greenberg exhibits you ways Mesos manages all of your datacenter as a unmarried logical entity, getting rid of the necessity to assign mounted units of machines to functions. you will fast notice why Mesos is the final word DevOps software.
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Extra info for Building Applications on Mesos: Leveraging Resilient, Scalable, and Distributed Systems
Sample text
Spread evenly by rack { // ... snip ... "constraints": [["rack", "GROUP_BY"]] } UNIQUE This operator ensures that every instance of the application has a different value for the UNIQUE constraint. info different values for the attribute, the application will fail to fully deploy, rather than running multiple instances on some slaves. Usually, GROUP_BY is the best choice for availability, since it’s generally preferable to have multiple tasks run‐ ning on a single slave rather than fewer than the desired number.
These con‐ straints can be driven either by the hostname of the slave or any slave attribute. Con‐ straints are provided in an array to the application; each constraint is itself an array of two or three elements, depending on whether there’s an argument. Let’s take a look at what constraints are available and how to use them: GROUP_BY This operator ensures that instances of the application are evenly spread across nodes with a particular attribute. You can use this to spread the application equi‐ tably across hosts (Example 3-3) or racks (assuming that the rack is encoded by the rack attribute on the slave; see Example 3-4).
Bamboo provides a complete solution for sophisticated HAProxy configurations for Marathon applications. HAProxy for microservices Nowadays, microservices are a popular architectural pattern. Mesos and Marathon form a great substrate for building microservices-based applications: after all, you can host all your services on Marathon. Unfortunately, service discovery is typically a substantial problem for microservice deployments. Let’s look at how we can use Mesos and Marathon to create a SmartStack-like system.