Cutting through the fog of cloud

Cutting Through The Fog Of
Cloud
Kyle Rames
Developer Advocate
@krames

Agenda
• Cloud 101
• Working in the Clouds

Infrastructure as a Service
IaaS

When I say Cloud,
you think...

source: https://www.ruby-toolbox.com/projects/fog

Fog Providers
>>
Fog.providers.keys

=>
[:atmos,
:aws,
:baremetalcloud,

:bluebox,:brightbox,
:clodo,
:cloudsigma,
:clou
dstack,
:digitalocean,
:dnsimple,
:dnsmadeeasy,

:dreamhost,
:dynect,
:ecloud,
:glesys,
:gogrid,

:google,
:hp,
:ibm,
:internetarchive,
:joyent,
:
libvirt,
:linode,
:local,
:ninefold,
:openstack,

:openvz,
:ovirt,
:rackspace,
:riakcs,
:serverlov
e,
:stormondemand,
:vcloud,
:vmfusion,
:voxel,
:
vsphere,
:xenserver,
:zerigo]

Rackspace Services
>>
Fog.services.select
{|k,v|

v.include?(:rackspace)

}.keys

=>
[:storage,
:cdn,
:compute,
:dns,

:block_storage,
:compute_v2,
:load_balancers,
:i
dentity,
:databases]

Load Balancer
VMVM
DNS
bespin-mining.com

Create Compute Service
>>
service
=
Fog::Compute.new
{

:provider
=>
'rackspace',

:version
=>
:v2,

:rackspace_username
=>
USERNAME,

:rackspace_api_key
=>
API_KEY,

:rackspace_region
=>
:ord

Get List of Images
>>
images
=
service.images

=>
<Fog::Compute::RackspaceV2::Images
[

<Fog::Compute::RackspaceV2::Image

id="ccaf99bc-‐472a-‐46ea-‐a125-‐d3ecfca66695",

name="FreeBSD
9.1",

...>,


id="16e6c0ae-‐f881-‐4180-‐95b0-‐3450fe3f8e96",

name="Red
Hat
Enterprise
Linux
6.4",

...>,

...

]>

Get Ubuntu Image
>>
image
=
images.find
do
|img|

img.name
=~
/Ubuntu/

end

=>

id="23cebbc9-‐3219-‐4a27-‐9210-‐d63e1af7181b",

name="Ubuntu
13.04
(Raring
Ringtail)",

...

>

Get Flavor
>>
flavor
=
service.flavors.first

=>
<Fog::Compute::RackspaceV2::Flavor

id="2",

name="512MB
Standard
Instance",

ram=nil,

disk=nil,

vcpus=nil,

links=[{"href"=>"https://
ord.servers.api.rackspacecloud.com/v2/772045/
flavors/2",
"rel"=>"self"},
{"href"=>"https://
ord.servers.api.rackspacecloud.com/772045/flavors/
2",
"rel"=>"bookmark"}]

Create Server
>>
tk_421
=
service.servers.create
{

:image_id
=>
image.id,

:flavor_id
=>
flavor.id,

:name
=>
'TK-‐421'}

=>
<Fog::Compute::RackspaceV2::Server

id="308e5fd5-‐ff50-‐42bd-‐911c-‐b91a9180673d",

name="TK-‐421",

created=nil,

updated=nil,

host_id=nil,

state=nil,

progress=nil,

...>

Update Server Object
>>
tk_421.reload 
=>
<Fog::Compute::RackspaceV2::Server

id="308e5fd5-‐ff50-‐42bd-‐911c-‐b91a9180673d",

name="TK-‐421",

created="2013-‐07-‐03T18:08:40Z",

updated="2013-‐07-‐03T18:08:43Z",

host_id="",

state="BUILD",

progress=0,

...>

Server Attributes
>>
tk_421.attributes

=>
{:image_id=>"23cebbc9-‐3219-‐4a27-‐9210-‐d63e1af7181b",

:flavor_id=>"2",
:name=>"TK-‐421",
:disk_config=>"AUTO"
,
:id=>"308e5fd5-‐ff50-‐42bd-‐911c-‐
b91a9180673d"
:state=>"BUILD",
:progress=>0,

...}

Fog Meta Magic
>>
tk_421.state

=>
"BUILD"

>>
tk_421.progress

=>
0

Is it ready?
>>
tk_421.reload

>>
tk_421.state

=>
"BUILD"

>>
tk_421.progress

=>
17

Waiting for TK-421
>>
tk_421.wait_for
{
ready?
}

=>
{:duration=>197.0}

Login
>>
tk_421.username

=>
“root”

>>
tk_421.password

=>
“r3b3lz-‐st1nk42”

Bootstrap
1. Creates server
2. Waits for server to finish building
3. Create ROOT_USER/.ssh/authorized_keys
4. Lock password for root user
5. Create ROOT_USER/attributes.json file
6. Create ROOT_USER/metadata.json file

Bootstrap
>>
tk_422
=
service.servers.bootstrap
{

:image_id
=>
image.id,

:flavor_id
=>
flavor.id,

:name
=>
'TK-‐422',

:public_key_path
=>
'~/.ssh/fog_rsa.pub',

:private_key_path
=>
'~/.ssh/fog_rsa'

}

SCP / SSH
>>
tk_422.scp
'setup.sh',
'/root/setup.sh'

>>
results
=
tk_422.ssh
‘sh
/root/setup.sh’

>>
results.first.stdout

=>
"Setting
up
VMrn"

We have only scratched
the surface!

Collection
Array
Fog::Collection
Fog::Compute::RackspaceV2::Images

Collection Methods
all
fetch every object of that type from the
provider.
get
fetch a single object by its identity from the
provider.
create
initialize a new record locally and a remote
resource with the provider.
new
initialize a new record locally, but do not
create a remote resource with the provider.

Collections
>>
service.collections

[:servers,
:flavors,
:images,
:at
tachments,
:networks]

Model
Fog::Model
Fog::Compute::RackspaceV2:Image

Model Methods
attributes
Returns a hash containing the list of model
attributes and values.
save Saves object. (not all object support update)
reload
Updates object with latest state from
service.
ready?
Returns true if object is in a ready state and
able to perform actions.
wait_for Periodically reloads model yielding to block.

Create Load Balancer Service
>>
lb_service
=

Fog::Rackspace::LoadBalancers.new
{

:rackspace_username
=>
USERNAME,

:rackspace_api_key
=>
API_KEY,

:rackspace_region
=>
:ord

}

Load Balancer Collections
>>
lb_service.collections

=>
[:load_balancers,
:nodes,
:virtual_ips,

:access_rules]

Creating a Load Balancer
lb
=
lb_service.load_balancers.

Creating a Load Balancer
lb
=
lb_service.load_balancers.create

:name
=>
'bob-‐the-‐balancer',

:protocol
=>
'HTTP',

:port
=>
80,

:virtual_ips
=>
[{:type
=>
'PUBLIC'}],

:nodes
=>
[{

:address
=>
tk_421.ipv4_address,

:port
=>
80,

:condition
=>
'ENABLED'

}]

Add Additional Node
lb.nodes.create
{

:address
=>
tk_422.ipv4_address,

:port
=>
80,

:condition
=>
'ENABLED'

}

IP Address
>>
vip
=
lb.virtual_ips.find
do
|ip|

ip.ip_version
==
"IPV4"

end

>>
vip.address

=>
"166.78.41.240"

Continuous Deployment
[tk_602,
tk_603].each
do
|server|

lb.nodes.create(:address
=>

server.ipv4_address,

:port
=>
80,

:condition
=>
'ENABLED')

end

existing_nodes.each
do
|node|

node.condition
=
'DRAINING'

node.save

end

Request Layer
• Mirrors REST interface
• Most efﬁcient way to access cloud
• Not portable between providers
• Preference model layer!

Requests
>>
service.requests

[:copy_object,
:delete_container,

:delete_object,
:get_container,
:
get_containers,
:get_object,

...]

Create DNS Service
>>
service
=
Fog::DNS.new
{

:provider

=>
'rackspace',

:rackspace_username
=>
USERNAME,

:rackspace_api_key

=>
API_KEY

}

DNS Requests
>>
dns_service.requests

=>
[:callback,
:list_domains,

:list_domain_details,
:modify_domain,
:create_do
mains,
:remove_domain,
:remove_domains,
:list_su
bdomains,
:list_records,
:list_record_details,
:
modify_record,
:remove_record,
:remove_records,

:add_records]

List Domains
>>
r
=
service.list_domains

#<Excon::Response:0x007fdf1ea0f7d0

@data={:body=>{"domains"=>[{"name"=>"bespin-‐
mining.com",
"id"=>3753036,
"accountId"=>772045,

"emailAddress"=>"darth@empire.com",

"updated"=>"2013-‐06-‐17T15:52:29.000+0000",

"created"=>"2013-‐06-‐17T15:52:29.000+0000"},..]}}

@headers={"Content-‐Type"=>"application/json",

"Via"=>"1.1
Repose
(Repose/2.6.11)",
"x-‐api-‐
version"=>"1.0.25",
"Content-‐Length"=>"1509",

"Date"=>"Fri,
05
Jul
2013
18:43:12
GMT",

"Server"=>"Jetty(8.0.y.z-‐SNAPSHOT)"},
@status=200,

@remote_ip="50.56.3.32">

Excon::Response
>>
domain
=
r.body["domains"].find
do
|h|

h["name"]
==
"bespin-‐mining.com"

end

=>
{"name"=>"bespin-‐mining.com",
"id"=>3753036,

"accountId"=>772045,

"emailAddress"=>"darth@empire.com",

"updated"=>"2013-‐07-‐05T19:07:42.000+0000",

"created"=>"2013-‐06-‐17T15:52:29.000+0000"}

>>
r.status

=>

200

Adding A Record
>>
vip
=
lb.virtual_ips.find
{|ip|

ip.ip_version
==
"IPV4"

}

>>
service.add_records
domain[“id”],
[{

:name
=>
'bespin-‐mining.com',

:type
=>
'A',

:data
=>
vip.address,

:ttl
=>
600

}]

Retrieve Image
service.images.get
"23cebbc9-‐3219-‐4a27-‐9210-‐d63e1af7181b"

module
Fog

module
Compute

class
RackspaceV2

class
Images
<
Fog::Collection

def
get(image_id)

data
=
service.get_image(image_id).body['image']

new(data)

rescue
Fog::Compute::RackspaceV2::NotFound

nil

end

end

end

end

end

module
Fog

module
Compute

class
RackspaceV2

class
Real

def
get_image(image_id)

request(

:expects
=>
[200,
203],

:method
=>
'GET',

:path
=>
"images/#{image_id}"

)

end

end

end

end

GET https://ord.servers.api.rackspacecloud.com:443/v2/5555/
images/23cebbc9-3219-4a27-9210-d63e1af7181b HTTP/1.1
Content-Type: application/json
Accept: application/json
X-Auth-Token: abc41dc54e594e9c8fb73b89b1b79142
Host: ord.servers.api.rackspacecloud.com:443

RACKSPACE® HOSTING | WWW.RACKSPACE.COM
http://developer.rackspace.com/#ruby
@krames
Questions?

Images
tule fog, marya, CC BY-SA 2.0
Clouds, Daniel Boyd, CC BY 2.0
Metroid II: Return of Samus, Michel Ngilen, CC BY-SA 2.0
Lego Mindstorms Kit, Marlon J. Manrique, CC BY 2.0
CD,Visual Pharm, CC BY-SA 2.0
Public Bikes, Richard Masoner / Cyclelicious, CC BY 2.0
PRIVATE, Rupert Ganzer, CC BY 2.0
Hybrid
Sorry We Are Not Open, Alan Levine, CC BY 2.0
We are, e1ther, CC BY 2.0

Images (cont)
Yipwm_1b, Greg Goebel, CC BY-SA 2.0
Pause Button, GreenLantern33, CC BY-SA 2.0
3..., Cristiano Betta, CC BY-SA 2.0

Cutting through the fog of cloud

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