ansible-mesos-playbook

An ansible playbook for launching a mesos cluster with docker (via Deimos and Marathon). Run this on Ubuntu 14.04 LTS. Read the blog post for a descriptive overview.

Getting Started

• Install librarian-ansible via gem install librarian-ansible
• Run librarian-ansible install
• Spin up a bunch of Ubuntu 14.04 servers, say 5.
• cp hosts.sample hosts and update the mesos_masters and mesos_slaves groups.
• Run ansible-playbook -i hosts playbook.yml.

The Setup

• zookeeper, haproxy, mesos-master and marathon with ha mode run on nodes in the mesos_master group. The zoo_id host variable is used to configure zookeeper.
• mesos-slave runs in the mesos_slaves group and are passed the list of mesos_masters for coordination.
• Deimos is installed on the slaves as the external container executor for Mesos.
• A cron job on each master is set up to query the marathon api and configure HAProxy.
• HAProxy routes a frontend (listening on port 80) to backends based on marathon tasks.
• You probably want to tweak the HAProxy configuration script (in /opt/marathon/bin) for your needs. With the current setup you can have a wildcard dns prefix route to a backend matching the marathon name: i.e. www.example.com would do a least-connection proxy to the www task.