Docker Cookbook

218 | Chapter 7: The Docker Ecosystem: Tools

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This had a side effect in the example: you needed to specify to run the application as
root
for Nginx to be deployed successfully. This was achieved with the 
-r
option of
ltc create
.
Although this basic setup was done with Vagrant, Lattice can be deployed in various
cloud providers by using 
Terraform
.
See Also
• Using 
buildpacks
 with Lattice
7.11 Running Containers via Apache Mesos and Marathon
Problem
You are looking for a cluster scheduler to launch containers on a Docker host in your
data center. You might also already be running Apache Mesos to schedule long-
running jobs, cron jobs, or even Hadoop or parallel computing workloads, and would
like to use it to run containers.
Solution
Use Apache 
Mesos
 and the Docker containerizer. Mesos is a cluster resource allocator
that leverages multiple scheduling frameworks to maximize utilization of your data-
center resources. Mesos is used by large companies like eBay, Twitter, Netflix, Airbnb,
and 
more
.
The Mesos 
architecture
 is based on one or several master nodes, worker nodes (or
Mesos slaves), one or more scheduling frameworks that are deployed in Mesos, and a
service-discovery system that uses 
ZooKeeper
. In 
Recipe 7.2
, you already saw how to
use Docker Compose to start a testing Mesos infrastructure on a single node.
Marathon
 is one of the Mesos frameworks that can allow you to run tasks on a Mesos
cluster. Mesos supports Docker (i.e., Docker containerizer). This means that you can
launch Marathon tasks that are made of Docker containers.
Amazon ECS service (see 
Recipe 8.11
) can also use Mesos to sched‐
ule containers on AWS. Docker Swarm (see 
Recipe 7.3
) is also
scheduled to add support for Mesos-based scheduling.
This recipe uses Mesos 
Playa
, a Mesos sandbox, to show you how to run Docker con‐
tainers with Mesos.