https://github.com/jwerak/coreos-mesos-marathon

This will serve as set of docker images that should enable running mesos on CoreOS
https://github.com/jwerak/coreos-mesos-marathon

Last synced: 9 days ago
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This will serve as set of docker images that should enable running mesos on CoreOS

• Host: GitHub
• URL: https://github.com/jwerak/coreos-mesos-marathon
• Owner: jwerak
• Created: 2014-07-18T16:05:53.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2014-08-15T13:24:58.000Z (about 10 years ago)
• Last Synced: 2024-08-02T14:12:40.888Z (3 months ago)
• Language: Shell
• Size: 3.59 MB
• Stars: 65
• Watchers: 10
• Forks: 8
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# Motivation

I want to run marathon-mesos-deimos setup (http://beingasysadmin.wordpress.com/2014/06/27/managing-docker-clusters-using-mesos-and-marathon/) on CoreOS.

I was ispired by Ebay's building from docker using hosts docker setup (http://www.ebaytechblog.com/2014/05/12/delivering-ebays-ci-solution-with-apache-mesos-part-ii/#.U85a4nV53Ua).

I want to enjoy both CoreOS and mesos resource management, in future hopefully kubernetes (https://github.com/mesosphere/kubernetes-mesos).

# Prerequisites

- fleetctl

- vagrant

- virtualbox

- python

 - docker-py==0.3.1

 - ansible

# Install

 - Start CoreOS cluster

  - for testing I am using vagrant - http://coreos.com/docs/running-coreos/platforms/vagrant/

  - slightly customized version is in coreos-vagrant directory

 - Connect to fleet from localhost - https://github.com/coreos/fleet/blob/master/Documentation/remote-access.md

  - fleet is getting ssh-keys from ssh-agent so if you don't have yours there already you can add one using

  - ``ssh-agent && vagrant ssh-config core-01 | sed -n "s/IdentityFile//gp" | xargs ssh-add``

  - ``export FLEETCTL_TUNNEL="$(vagrant ssh-config core-01 | sed -n "s/[ ]*HostName[ ]*//gp"):$(vagrant ssh-config core-01 | sed -n "s/[ ]*Port[ ]*//gp")"``

 - make initial changes on coreos hosts, following commnads have to be run from ansible directory

  - ansible-playbook -i vagranttest coreos.yml

 - submit and start following units:

  - registry

   - ansible-playbook -i vagranttest coreos-registry.yml

  - zookeeper

   - ansible-playbook -i vagranttest coreos-zookeeper.yml

  - mesos-master

   - ansible-playbook -i vagranttest coreos-mesos-master.yml

  - mesos-slave

   - ansible-playbook -i vagranttest coreos-mesos-slave.yml

  - marathon

   - ansible-playbook -i vagranttest coreos-marathon.yml

 - Test marathon API

  - ``curl -v -X POST -H "Content-Type: application/json" :8080/v2/apps [email protected]``

  - test.json:

``	{

	"id": "test",

	"container": {"image": "docker:///debian:jessie", "options" : []},

	"cmd": "while sleep 10; do date -u +%T; done",

	"cpus": "0.5",

	"mem": "268.0",

		"uris": [ ],

		"instances": "1"

	}``

# Architecture

 - Host OS

  - CoreOS - https://coreos.com/

   - Native Technology:

    - ETCD - key/value store 

    - Fleet - cluster level systemd

     - Used for triggering cluster apps - zookeeper, mesos-master/slave, marathon

    - Omaha update protocol - https://github.com/coreos/go-omaha

  - Mesos - Resource manager gathers resources

  - Marathon - Mesos framework for running docker images

  - Deimos - python Docker bindings for mesos-slave

# Features

 - Deploy app simply by specifying:

  - image name

  - cpu, ram

  - No. of instances

 - Fault tolerance - Environment will ensure that apps are running

 - Speed

  - Dev/Test

   - Create stack faster on demand (Ebay has minimal stack up in 10 minutes)

  - Prod

   - Faster Scaling - simply run more instances of app

 - Better resource utilization

  - Scale apps up/down on demand

   - http://blog.docker.com/2014/06/dockercon-video-cluster-management-and-containerization-at-twitter/

# TODO

 - [x] Crate docker images for

  - Docker Registry

  - Zookeeper

  - Mesos-master

  - Mesos-slave

  - Marathon (mesos framework)

 - [ ] Run apps in HA 

  - [ ] Create pattern Unit files

   - [ ] Idealy using some tool (ansible...)

  - [ ] Set dynamic communication between services

   - using etcd

   - using haproxy generated from marathon (https://github.com/mesosphere/marathon)