geni: geni - tutorial: introduction to omni...sponsored by the national science foundation tutorial:...
TRANSCRIPT
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Sponsored by the National Science Foundation
Tutorial: Introduction to Omni
Niky Riga, Sarah Edwards GENI Project Office 23 October 2012
$ omni.py createsliver aliceslice myRSpec.xml INFO:omni:Loading config file omni_config INFO:omni:Using control framework pgeni INFO:omni:Slice urn:publicid:IDN+pgeni.gpolab. expires within 1 day on 2011-07-07 INFO:omni:Creating sliver(s) from rspec file INFO:omni:Writing result of createsliver for INFO:omni:Writing to ‘aliceslice-manifest-rspe INFO:omni: ----------------------------------- INFO:omni: Completed createsliver: Options as run: aggregate: https://www.emulab. framework: pgeni native: True Args: createsliver aliceslice myRSpec.xml Result Summary: Slice urn:publicid:IDN+pgeni Reserved resources on https://www.emulab.net/p Saved createsliver results to aliceslice-man INFO:omni: ===================================
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Sponsored by the National Science Foundation 2 GEC11: July 26, 2011
Let’s start …
Prework
Configure Omni
Run your experiment
Cleanup resources
Wrap up
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Sponsored by the National Science Foundation 3 GEC11: July 26, 2011
Tutorial Overview
• Learn what is happening behind the scenes – How is an experiment setup ? – What are the key participants?
• Use Mesoscale for your experiment – Run Layer 2 (and up) experiments
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Sponsored by the National Science Foundation 4 GEC11: July 26, 2011
Looking behind the scenes Disclaimer
• GENI is evolving fast – What is true today, might change tomorrow
• Use tutorial resources as a pointer
• Best place to get up-to-date info is the GENI wiki
• Email us with questions ([email protected])
http://groups.geni.net/geni/wiki/GeniExperiments
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Sponsored by the National Science Foundation 5 GEC11: July 26, 2011
GENI Clearinghouse (CH)
Experimenter
Terminology
Slice
Sliver A Sliver B Sliver C
Slice Authority (SA)
AM A AM B AM C
Aggregate Managers (AMs)
Stitching
UC
SC
RSpec RSpec
RSpec
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Sponsored by the National Science Foundation 6 GEC11: July 26, 2011
GENI Clearinghouse (CH)
Experimenter
For the Tutorial: Keep it simple
Slice
Sliver
Slice Authority (SA)
AM
emulab.net
pgeni.gpolab.bbn.com
ProtoGENI Aggregate
You Once you understand how to run this simple experiment, scaling up
is easy!
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Sponsored by the National Science Foundation 7 GEC11: July 26, 2011
Experimenter
GENI Accounts, GENI Credentials, GENI Certificates, GENI Keys
GENI Account : Usually this refers to your web UI account (e.g. pgeni.gpolab.bbn.com, emulab.net, etc) GENI Certificate : identifies user; created by CH and you can download it through the webUI, it is an ssl certificate GENI Credential : identifies user's permissions; you almost never have to handle; tools query it from CH, SA GENI Keys : Access to compute resources are through ssh-keys, you can use your own or use the one GENI created for you Password : GENI account password; use to login to ProtoGENI web UI Passphrase : like a password but for you certificate and you ssh keys
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Sponsored by the National Science Foundation 8 GEC11: July 26, 2011
Today’s GENI Experiments
Slice
ProtoGENI
MyPLC sliver OpenFlow sliver
UC
MyPLC sliver
Slice
ProtoGENI sliver
MyPLC sliver
OpenFlow sliver
UC
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Sponsored by the National Science Foundation 9 GEC11: July 26, 2011
Omni: Resource Reservation tool
• A command line experimenter tool
• Create slices and slivers using the GENI AM API
• Written in and scriptable from Python
• Use existing accounts – ProtoGENI – PlanetLab – GENI Portal
• Works with aggregates that implement the GENI AM API – ProtoGENI, PlanetLab,
OpenFlow, InstaGENI, ExoGENI
$ omni.py createsliver aliceslice myRSpec.xml INFO:omni:Loading config file omni_config INFO:omni:Using control framework pgeni INFO:omni:Slice urn:publicid:IDN+pgeni.gpolab. expires within 1 day on 2011-07-07 INFO:omni:Creating sliver(s) from rspec file INFO:omni:Writing result of createsliver for INFO:omni:Writing to ‘aliceslice-manifest-rspe INFO:omni: ----------------------------------- INFO:omni: Completed createsliver: Options as run: aggregate: https://www.emulab. framework: pgeni native: True Args: createsliver aliceslice myRSpec.xml Result Summary: Slice urn:publicid:IDN+pgeni Reserved resources on https://www.emulab.net/p Saved createsliver results to aliceslice-man INFO:omni: ===================================
http://trac.gpolab.bbn.com/gcf/wiki/Omni
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Omni Command Workflow
createslice!
listmyslices!
getversion!
renewslice!
createsliver!
listresources!
sliverstatus!
deletesliver!
Repeat for each aggregate
Repeat for each aggregate
Create Slice
Create Sliver Cleanup
Legend: AM API command
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omni_configure.py!
���[omni]!default_cf = pgeni !users = gpousr21!# ---------- Users ----------![gpousr21]!urn = urn:publicid:IDN+pgeni.gpolab.bbn.com+user+gpousr21 !keys = ~/.ssh/geni_key!
...!!
ü You only need your GENI certificate passphrase ü It will create the ssh key for uploading to compute resources ü Standard AM nicknames
Run this script for standard configuration: 1. Download GENI certificate 2. Run the script
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clear-passphrases.py!
Removes the passphrase from • GENI certificate • GENI ssh key
Use this script with caution. Don’t use it on public computers.
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omni_config!���[omni]!default_cf = pgeni # Tutorial accounts are on GPO’s PG!users = gpousr21 # gpousr21’s keys loaded on the VM to allow login!!# ---------- Users ----------![gpousr21]!urn = urn:publicid:IDN+pgeni.gpolab.bbn.com+user+gpousr21 !# Really important to get the keys correct!!!!#key to load on VM!keys = ~/Tutorials/Omni/gpousr20/ssh/gpousr20_key.pub!!# default aggregates to run omni commands on!aggregates = http://emulab.net/protogeni/xmlrpc/am, https://pgeni.gpolab.bbn.com/protogeni/xmlrpc/am, ...!
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omni_config (cont.) ���# ---------- Frameworks ----------![pgeni]!type = pg!ch = https://www.emulab.net:443/protogeni/xmlrpc/ch!sa = https://www.pgeni.gpolab.bbn.com:443/protogeni/xmlrpc/sa!!# Tutorial certificate and key!cert = ~/omni_tutorial/ssh/gpousr21_cert_ct.pem!key = ~/omni_tutorial/ssh/gpousr21_cert_ct.pem!!���#------ AM nicknames ----------------!���[aggregate_nicknames]!pg-gpo=urn:publicid:IDN+pgeni.gpolab.bbn.com+authority+am,https://pgeni.gpolab.bbn.com/protogeni/xmlrpc/am!plc=,https://www.planet-lab.org:12346!!
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omni.py getversion!
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Getting Help
• omni.py –h! Lists all commands and their arguments Lists all command line options Lists Omni version Lists url to find out more information about Omni
• Omni Troubleshooting page:
http://trac.gpolab.bbn.com/gcf/wiki/OmniTroubleShoot
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Before we start
• Many people will be accessing the resources, so some calls might fail. Wait a bit and try again!
• Omni is a command line tool, copy-paste is your friend
• You can copy-paste between your computer and the VM.
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Experiment Progress
Prework
Configure Omni
Run your experiment
Cleanup resources
Wrap up
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Prework
Configure Omni
Run your experiment
Cleanup resources
Wrap up
Experiment Progress
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Request Resources
Resource Specification Document (RSpec) • XML document that describes resources
– hosts, links, switches, etc
• today only 1 RSpec version is used – GENI v3
• AM extensions • Client extensions • Tool extensions
• Other versions are supported – SFA – ProtoGENI v2.0
<?xml version="1.0" encoding="UTF-8"?> <rspec xmlns="http://www.protogeni.net/resources/rspec/2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.protogeni.net/resources/rspec/2 http://www.protogeni.net/resources/rspec/2/request.xsd” type="request" > <node client_id="my-node" exclusive="false"> <sliver_type name="emulab-openvz" /> </node> </rspec>
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GENI v3 RSpecs
���<rspec type="request" xsi:schemaLocation=“… ” xmlns=" ���"http://www.geni.net/resources/rspec/3""> ! <node client_id=“…” component_manager_id=“urn:…" component_id=”urn:…” component_name=“…” exclusive="true"> ! <sliver_type name="raw-pc"> !
! <disk_image name=”urn:…”> ! </sliver_type> ! <services> ! <execute command=“…” shell=“…” /> ! <install install_path=“…” ! url=“…” ! file_type=“…”/>! </services> ! </node>!</rspec>!
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The Three Types of RSpecs
Aggregate Manager
Client
Advertisement
Request
Manifest
Advertisement RSpec : What does the AM have? Request RSpec : What does the Experimenter want? Manifest RSpec: What does the Experimenter have?
omni.py li
stresource
s slicenam
e
omni.py li
stresource
s
omni.py createsliver slicename reqRSpec!
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Too many RSpecs ….
• There is an art in writing well formed RSpecs
• Do not try to write one from scratch – Find example RSpecs and use
them as your base – Use tools, like Flack, to generate
sample RSpecs for you – When appropriate modify
advertisement RSpecs
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Prework
Configure Omni
Run your experiment
Cleanup resources
Wrap up
Experiment Progress
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Scripting Omni
• You can write custom Python scripts – Call existing Omni functions – Parse the Output
• Example: readyToLogin.py – Calls getversion, sliverstatus, listresources – Parses output – Determines ssh command to log into node – Print ssh configuration blocks to place in your ssh
config file
• More examples distributed with Omni
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Cleanup
• When your experiment is done, you should always release your resources. – Archive your data – Delete all your slivers
• OpenFlow slivers might outlive your slice, make sure you delete them before your slice expires
– When appropriate delete your slice
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Prework
Configure Omni
Run your experiment
Cleanup resources
Wrap up
Experiment Progress
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Prework
Configure Omni
Run your experiment
Cleanup resources
Wrap up
Experiment Progress
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Backbone #1
Backbone #2
Campus #3
Campus #2
Access #1
Research Testbed
Campus Your GENI Slice
• Get an account to run experiments on GENI • Contact us at [email protected]
• More information on Experimenter Portal:
– http://groups.geni.net/geni/wiki/ExperimenterPortal
Running Experiments on GENI
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• Fill out the survey • Attend more tutorials
• Come to Experimenter Drop-in session Wednesday 3-5pm
• Come to coding sprint and start your experiment
Thursday 1-5pm
The end ….
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Prework
Configure Omni
Run your experiment
Cleanup resources
Wrap up
Experiment Progress
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… the end!
UC
UC
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Backup Slides
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Omni Resources
• Primary Information – omni.py -h – Omni Troubleshooting page:
http://trac.gpolab.bbn.com/gcf/wiki/OmniTroubleShoot – For Omni specific help: [email protected] – For general GENI help: [email protected]
• Omni Wiki (install instructions, documentation, bug reporting):
http://trac.gpolab.bbn.com/gcf/wiki/Omni • For an overview of GENI Experimentation using Omni:
– http://groups.geni.net/geni/wiki/GENIExperimenter • Example experiment walk-through:
– http://groups.geni.net/geni/wiki/GENIExperimenter/ExperimentExample • Example script walk-throughs:
– http://trac.gpolab.bbn.com/gcf/wiki/OmniScriptingWithOptions and http://trac.gpolab.bbn.com/gcf/wiki/OmniScriptingExpiration
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Omni Commands!
• omni.py getversion!• omni.py createslice slicename!• omni.py renewslice slicename date!• omni.py listmyslices username!• omni.py createsliver slicename requestRSpec!
• omni.py sliverstatus slicename!• omni.py listresources [slicename]!
-t ProtoGENI 2 to request PGV2 Rspecs • omni.py deletesliver slicename !
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Other Omni command line arguments
!-c omni_config to use another omni_config!-f plc to use a different framework!-t ProtoGENI 2 to specify the version of the Rspec