Using OpenStack With
Fog
houston.rb 6/10/14

• @mwhagedorn (mwhagedorn)
• github.com/mwhagedorn

employer
• hpcloud.com
• @hpcloud

what is OpenStack?
• Open source cloud infrastructure
• Broadly available
• Runs on non proprietary hardware
• Governed by the OpenStack Foundation
• AT&T, Canonical, HP, IBM, Rackspace
(others)

OpenStack birth
“ Launched Nova. Apache-Licensed Cloud
Computing, in Python. It’s live. it’s buggy, it’s
beta. Check it out “
- Joshua McKenty blog post, summer 2010
@jmckenty
(Joshua McKenty)

OpenStack birth
• NASA Aimes CTO
• Worked with Microsoft/Google
on some NASA visualizations
• Preferred Google’s approach
• NASA needs a cloud!
@kemp
(Chris Kemp)

OpenStack birth
• Rackspace spotted the blog
post
• They decided to collaborate

Philosophy
“Why Do This?”

brief history of computing
• PCs
• Data Centers
• Hypervisors
• Hypervisor chaos

the vision
OpenStack
Hyper-V VMware Xen KVM

OpenStack projects
• Nova (Compute)
• Swift (Object Storage)
• Cinder (Block Storage)
• Quantum (Networking)
• Horizon (Dashboard)
• Keystone (Identity)
• Glance (VM Images)

devstack.org
• git clone https://github.com/
openstack-dev/devstack.git
• cd devstack && ./stack.sh

trystack.org
• sandbox for exploration

horizon demo

ok, why should I care?
• Less than 2% of global
compute workloads run on
AWS
• Large companies have public
data concerns
• Countries have security
concerns

this stuff is too hard!

fog
• ruby cloud services
• fog.io
• github.com/fog/fog
• @fog
• @geemus (Wesley Beary)
• “gem install fog”

fog
• portable
• powerful
• established

fog
• libraries
• knife
• chef
• bosh
• carrierwave
• paperclip

fog providers
• set of adapters for specific cloud
• aws, hp, rackspace.. etc

fog
require "fog"
require "ostruct"
!
user = OpenStruct.new({
:access_key=>{
:access_key_id => "<MY_HP_KEYID>"
:secret_key => "<MY_HP_SECRET_KEY>"
}, :tenant_id => "<MY_HP_TENANT_ID>"
})
!
@connection ||= Fog::Compute.new(
:provider => 'HP',
:hp_access_key => user.access_key[:access_key_id],
:hp_secret_key => user.access_key[:secret_key],
:version => "v2",
:hp_auth_uri => "https://region-a.geo-1.identity.hpcloudsvc.com:35357/v2.0/tokens",
:hp_tenant_id => user.tenant_id,
:hp_avl_zone => "region-b.geo-1"
)

fog
flavors = @connection.list_flavors
images = @connection.list_images
server_response = @connection.create_server("my server",
flavors.body["flavors"].first["id"],
images.body["images"].first["id"])
server_id = server_response.body["server"]["id"]
while(true){
response = @connection.list_servers(:status => "ACTIVE")
active_ids = response.body["servers"].map { |s| s["id"] }
unless active_ids.select { |item| item == server_id }.empty?
break
end
sleep(2)
}
!
#do stuff now

fog collections
module Fog
module Compute
class HPV2
class VolumeAttachments < Fog::Collection
!
model Fog::Compute::HPV2::VolumeAttachment
!
attr_accessor :server
!
def all
requires :server
data = service.list_server_volumes(server.id).body['volumeAttachments']
load(data)
end
!
def get(volume_id)
requires :server
if data = service.get_server_volume_details(server.id, volume_id).body['volumeAttachment']
new(data)
end
rescue Fog::Compute::HPV2::NotFound
nil
end
end
end
end
end

fog models
module Fog
module Compute
class HPV2
!
class AvailabilityZone < Fog::Model
!
identity :name, :aliases => 'zoneName'
!
attribute :zoneState
attribute :hosts
!
def available?
zoneState['available']
end
!
end
!
end
end
end

fog requests
• actual business logic for request
def list_flavors(options = {})
request(
:expects => [200, 203],
:method => 'GET',
:path => 'flavors',
:query => options
)
end

fog mocks
• test data to return example API responses
• requires no network connection

fog real
• actual request implementation

the fog “stack”
collections
models
requests
cloud provider
servers
server
list_servers

fog and OpenStack
• fog/openstack-core is the
official ruby sdk for
OpenStack
• Under active development

fog bin
• fog <provider>
• convenient way to explore
with fog
• uses .fog file in your home dir

demo

examples
• developer.rackspace.com (rails)
• http://goo.gl/HN78A3
• HP provider examples for compute (v2)
• http://goo.gl/bJaO6O

getting involved
• OpenStack
• https://wiki.openstack.org/wiki/How_To_Contribute
• Fog
• https://github.com/fog/fog/issues

questions?
@mwhagedorn
mike.hagedorn@hp.com