devnet workshop best rest in openstack · devnet workshop – best rest in openstack charles eckel,...

DevNet Workshop –Best REST in OpenStack

Charles Eckel, Open Source Developer Evangelist, @eckelcu

Vikram Hosakote, Sr. Software Engineer

DEVNET-2004

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Cisco Spark

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How

cs.co/ciscolivebot#DEVNET-2004

• What are REST APIs?

• How do REST APIs work in OpenStack?

• Using APIs to create virtual objects (network, subnet, router, virtual machine)

• Q&A

Agenda

What are REST APIs?


REpresentational State Transfer (REST) APIs

Any state needed to handle request is contained in request itself, as part of the URI, query-string parameters, body, or headers

Endpoint - 192.168.20.3:9696/v1/person/1234/details

Returned JSON:

{

‘FirstName’ : ‘Vikram’,

‘LastName’ : ‘Hosakote’,

‘Company’ : ‘Cisco Systems’,

‘City’ : ‘Boston’,

‘Team’ : ‘Cloud and Data center’

}

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Types of REST Requests

Methods (HTTP verbs):

• POST (create)

• GET (read)

• PUT (update/replace)

• PATCH (update/modify)

• DELETE (delete)

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How do REST APIs work in OpenStack?


REST APIs in OpenStack

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Using APIs to create virtual objects (network, port, virtual machine, router)


OpenStack virtual objects

• Network (neutron)

• Subnet (neutron)

• Router (neutron)

• Virtual Machine (nova)

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OpenStack virtual objects

When we create each virtual object, we will:

• Check the output in the OpenStack GUI (horizon)

• Analyze the captured REST API packet (HTTP) in WireShark

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Useful OpenStack REST API links

• Neutron:

• https://docs.openstack.org/user-guide/sdk-neutron-apis.html

• https://docs.openstack.org/developer/python-neutronclient/usage/library.html

• https://github.com/openstack/python-neutronclient/blob/master/doc/source/usage/library.rst

• Nova:

• https://docs.openstack.org/developer/python-novaclient/api.html

• https://docs.openstack.org/developer/python-novaclient/ref/v2/servers.html

• https://docs.openstack.org/developer/python-novaclient/ref/v2/quotas.html

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Useful OpenStack REST API links

• Workshop steps:

https://github.com/vhosakot/Cisco-Live-Workshop/blob/master/best-

rest/scripts/steps.RST

• Script/library used in the workshop:

https://github.com/vhosakot/Cisco-Live-Workshop/blob/master/best-

rest/scripts/api_setup.py

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Cisco Spark

Questions? Use Cisco Spark to communicate with the speaker after the session

1. Find this session in the Cisco Live Mobile App

2. Click “Join the Discussion”

3. Install Spark or go directly to the space

4. Enter messages/questions in the space

How

cs.co/ciscolivebot#DEVNET-2004


• Please complete your Online Session Evaluations after each session

• Complete 4 Session Evaluations & the Overall Conference Evaluation (available from Thursday) to receive your Cisco Live T-shirt

• All surveys can be completed via the Cisco Live Mobile App or the Communication Stations

Don’t forget: Cisco Live sessions will be available for viewing on-demand after the event at www.ciscolive.com/global/on-demand-library/.

Complete Your Online Session Evaluation

http://ciscolive.com/Online

http://www.ciscolive.com/global/on-demand-library/


Continue Your Education

• Become a DevNet Member:

• https://developer.cisco.com/join

• Access OpenStack resources

• https://developer.cisco.com/site/openstack/

• Visit our Open Source Dev Center:

• https://developer.cisco.com/site/opensource/

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https://developer.cisco.com/join/fosdem18

https://developer.cisco.com/site/openstack/

https://developer.cisco.com/site/opensource/

Thank you

devnet workshop best rest in openstack · devnet workshop – best rest in openstack charles eckel,...

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