Apache Mesos was the first open source cluster manager to handle workloads in a distributed environment through dynamic resource sharing and isolation. It is great for deploying and managing applications in large-scale cluster environments.
Since its inception, Mesos has been under constant development and it is one of the most mature, robust and stable cluster managers in both the open source and commercial software worlds.
This guide is packed with powerful recipes for using Apache Mesos and its integration with containers and frameworks.
Chapter 1, Getting Started with Apache Mesos, provides instructions for installing Mesos on several different operating systems.
Chapter 2, Implementing High Availability with Apache ZooKeeper, teaches you how to install Apache Zookeeper and configure it with Mesos to create a multi-master, highly available Mesos cluster.
Chapter 3, Running and Maintaining Mesos, describes the components of a running Mesos cluster and shows you how to configure them.
Chapter 4, Understanding the Scheduler API, first teaches you about frameworks and how they interact with Mesos, then proceeds to show you how to develop a simple framework.
Chapter 5, Managing Containers, shows you how to deploy and manage containerizers in Mesos.
Chapter 6, Deploying PaaS with Marathon, demonstrates how to install and configure Marathon and other tools required to set up a private PaaS.
Chapter 7, Job Scheduling with Metronome, shows you how to run a cron service on Mesos.
Chapter 8, Continuous Integration with Jenkins, teaches you how to run a highly scalable Jenkins continuous integration and continuous delivery system on Mesos.
We recommend one server or virtual machine installed with Ubuntu 14.04 as a development environment for following most of the recipes in this book. To test the high availability recipes in Chapter 2, Implementing High Availability with Apache ZooKeepera minimum of six servers or virtual machines is required. Chapters 1, Getting Started with Apache Mesosand Chapter 2, Implementing High Availability with Apache ZooKeeperwill guide you through installing and configuring Mesos and ZooKeeper on multiple operating systems but we recommend mastering the recipes in chapters 3 - 8 on Ubuntu 14.04 before adapting them for other supported operating systems.
This book is for systems administrators, engineers, and programmers who are interested in using Mesos. Basic experience with distributed systems and cluster management would be helpful but is not essential. A working knowledge of the Linux operating system is expected.
In this book, you will find several headings that appear frequently (Getting ready, How to do it..., How it works..., There's more..., and See also). To give clear instructions on how to complete a recipe, we use these sections as follows:
This section tells you what to expect in the recipe, and describes how to set up any software or any preliminary settings required for the recipe.
This section usually consists of a detailed explanation of what happened in the previous section.
This section consists of additional information about the recipe in order to make the reader more knowledgeable about the recipe.
In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.
Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: " By default, Marathon logs to stdout and syslog."
A block of code is set as follows:
cat <<EOF > /etc/systemd/system/traefik.service [Unit] Description=Traefik Wants=network-online.target After=network.target network-online.target [Service] Restart=on-failure ExecStart=/usr/bin/traefik [Install] WantedBy=multi-user.target EOF
Any command-line input or output is written as follows:
curl -k https://localhost:8443/ping
New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: " You should also be able to see Marathon listed as a framework in the Mesos UIFrameworks tab."
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