wiki:GENIExperimenter/ExperimentExample-stitching

Version 10 (modified by lnevers@bbn.com, 6 years ago) (diff)

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GENI Network Stitching Example

This page used gcf 2.4 preview 7 to show an example experiment that creates a network stitching path between the GPO InstaGENI and the Utah InstaGENI racks.

<<Insert Image>>

The experiment uses GENI Clearinghouse credentials with the omni tool named stitcher.py. GENI network stitching does not require any special configuration. If you haven't already configured Omni, please follow these configuration instructions.

Design the Stitching Experiment

Design/Setup

At this time GENI network stitching is supported by several aggregate, this example shows a simple stitching scenario with one server VM in the GPO InstaGENI rack and one VM client in the Utah InstaGENI rack that are connected with a link. The server-gpo host is configured to be both a Web Server and an Iperf server, also a routable IP address is requested to access the web server. All this is captured in the request RSpec used for this experiment:

Assemble a Request Rspec that includes one VM at each rack site:

<?xml version="1.0" encoding="UTF-8"?>
<rspec type="request" 
	xmlns="http://www.geni.net/resources/rspec/3" 
	xmlns:planetlab="http://www.planet-lab.org/resources/sfa/ext/planetlab/1" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
       xmlns:stitch="http://hpn.east.isi.edu/rspec/ext/stitch/0.1/" 
	xsi:schemaLocation="http://www.geni.net/resources/rspec/3 
	http://www.geni.net/resources/rspec/3/request.xsd">  
  <node client_id="server-gpo" component_manager_id="urn:publicid:IDN+instageni.gpolab.bbn.com+authority+cm" exclusive="false">
    <sliver_type name="emulab-openvz"/>
    <services>
      <execute command="sudo /local/install-script.sh" shell="sh"/>
      <install install_path="/local" url="http://www.gpolab.bbn.com/~lnevers/StitchDemo.tar.gz"/>
   </services>
    <emulab:routable_control_ip xmlns:emulab="http://www.protogeni.net/resources/rspec/ext/emulab/1"/>
    <interface client_id="server-gpo:if0">
      <ip address="192.168.4.1" netmask="255.255.255.0" type="ipv4"/>
    </interface>
  </node>
  <node client_id="client-utah" component_manager_id="urn:publicid:IDN+utah.geniracks.net+authority+cm" exclusive="false">
    <sliver_type name="emulab-openvz"/>
   <services>
      <execute command="sudo /local/install-script.sh" shell="sh"/>
      <install install_path="/local" url="http://www.gpolab.bbn.com/~lnevers/StitchDemo.tar.gz"/>
    </services>
    <interface client_id="client-utah:if0">
      <ip address="192.168.4.2" netmask="255.255.255.0" type="ipv4"/>
    </interface>
  </node>
  <link client_id="link">
    <component_manager name="urn:publicid:IDN+instageni.gpolab.bbn.com+authority+cm"/>
    <component_manager name="urn:publicid:IDN+utah.geniracks.net+authority+cm"/>
    <interface_ref client_id="server-gpo:if0"/>
    <interface_ref client_id="client-utah:if0"/>
    <property source_id="server-gpo:if0" dest_id="client-utah:if0" capacity="100000"/>
    <property source_id="client-utah:if0" dest_id="server-gpo:if0" capacity="100000"/>
  </link>
</rspec>

In the above RSpec, the link information in the component_manager name is used by the stitcher.py script to contact the GENI Stitching Computation Service and determine a path between the end-point.

Execute the Stitching experiment

Execute

First create a slice for this experiment:

$ omni.py print_slice_expiration ig-gpo-ig-utah
07:30:38 INFO     omni: Loading config file /home/lnevers/.gcf/omni_config
07:30:38 INFO     omni: Using control framework portal
07:30:40 INFO     omni: Slice urn:publicid:IDN+ch.geni.net:ln-prj+slice+ig-gpo-ig-utah expires on 2013-07-25 00:00:00 UTC
07:30:40 INFO     omni:  ------------------------------------------------------------
07:30:40 INFO     omni:  Completed print_slice_expiration:

  Options as run:
		framework: portal
		project: ln-prj

  Args: print_slice_expiration ig-gpo-ig-utah

  Result Summary: Slice urn:publicid:IDN+ch.geni.net:ln-prj+slice+ig-gpo-ig-utah expires on 2013-07-25 00:00:00 UTC 
07:30:40 INFO     omni:  ============================================================

A sliver that included a stitched VLAN path can be created using the stitcher.py script. There is no need to specify the -a aggregate option, aggregates are determined from the RSpec and need not be specified. Also note that a file is created in the directory where the sliver is created that capture the aggregates associated with the slice. Following is the stitcher operation that setup up all slivers:

$ stitcher.py createsliver ig-gpo-ig-utah stitch-ig-gpo-ig-utah.rspec -o
07:31:45 INFO     stitcher: Loading config file /home/lnevers/.gcf/omni_config
07:31:45 INFO     stitcher: Using control framework portal
07:31:45 INFO     stitcher: Checking that slice ig-gpo-ig-utah is valid...       <==(1)
07:31:46 INFO     stitcher: Slice urn:publicid:IDN+ch.geni.net:ln-prj+slice+ig-gpo-ig-utah expires on 2013-07-25 00:00:00 UTC
07:31:47 INFO     stitcher: <Aggregate urn:publicid:IDN+utah.geniracks.net+authority+cm> speaks AM API v3, but sticking with v2 <==(2)
07:31:47 INFO     stitcher: <Aggregate urn:publicid:IDN+instageni.gpolab.bbn.com+authority+cm> speaks AM API v3, but sticking with v2   <==(2)
07:31:47 INFO     stitcher: <Aggregate urn:publicid:IDN+emulab.net+authority+cm> speaks AM API v3, but sticking with v2          <==(2)
07:31:47 INFO     stitch.Aggregate: Writing to '/tmp/ig-gpo-ig-utah-createsliver-request-11-instageni-gpolab-bbn-com.xml'  <==(3)
07:31:47 INFO     stitch.Aggregate: 
	Stitcher doing createsliver at https://boss.instageni.gpolab.bbn.com:12369/protogeni/xmlrpc/am
07:32:04 INFO     stitch.Aggregate: Allocation at <Aggregate urn:publicid:IDN+instageni.gpolab.bbn.com+authority+cm> complete.
07:32:04 WARNING  stitch.Aggregate: Slivers at PG Utah may not be requested initially for > 5 days. PG Utah slivers will expire earlier than at other aggregates - requested expiration being reset from 2013-07-25T00:00:00Z to 2013-07-21T11:12:04Z
07:32:04 INFO     stitch.Aggregate: Writing to '/tmp/ig-gpo-ig-utah-createsliver-request-11-emulab-net.xml'                <==(3)
07:32:04 INFO     stitch.Aggregate: 
	Stitcher doing createsliver at https://www.emulab.net:12369/protogeni/xmlrpc/am
07:33:12 INFO     stitch.Aggregate: Allocation at <Aggregate urn:publicid:IDN+emulab.net+authority+cm> complete.
07:33:12 INFO     stitch.Aggregate: Writing to '/tmp/ig-gpo-ig-utah-createsliver-request-11-utah-geniracks-net.xml'         <==(3)
07:33:12 INFO     stitch.Aggregate: 
	Stitcher doing createsliver at https://boss.utah.geniracks.net:12369/protogeni/xmlrpc/am
07:33:33 INFO     stitch.Aggregate: Allocation at <Aggregate urn:publicid:IDN+utah.geniracks.net+authority+cm> complete.
07:33:33 INFO     stitch.Aggregate: Writing to '/tmp/ig-gpo-ig-utah-createsliver-request-11-ion-internet2-edu.xml'          <==(3)
07:33:33 INFO     stitch.Aggregate: 
	Stitcher doing createsliver at http://geni-am.net.internet2.edu:12346                                           
07:34:18 INFO     stitch.Aggregate: DCN AM <Aggregate urn:publicid:IDN+ion.internet2.edu+authority+am>: must wait for status ready....  <==(4)
07:34:18 INFO     stitch.Aggregate: Pause to let circuit become ready...
07:34:55 INFO     stitch.Aggregate: DCN circuit 22931 is ready
07:35:02 INFO     stitch.Aggregate: Allocation at <Aggregate urn:publicid:IDN+ion.internet2.edu+authority+am> complete.
07:35:02 INFO     stitch.launcher: All aggregates are complete.
07:35:02 INFO     stitcher: Writing to 'ig-gpo-ig-utah-manifest-rspec-stitching-combined.xml'
07:35:02 INFO     stitcher: Saved combined reservation RSpec at 4 AMs to file ig-gpo-ig-utah-manifest-rspec-stitching-combined.xml    <==(5)
Stitching success: Reserved resources in slice ig-gpo-ig-utah at 4 Aggregates (including 2 intermediate aggregate(s) not in the 
original request), creating 1 link(s).  

(1) Sticher.py runs rspeclint on the stitch-ig-gpo-ig-utah.rspec file.
(2) Sticher.py contacts the Stitching Computation Service (SCS) and returns the list of AMs that are needed to establish the stitching path in addition to the Internet2/ION aggregate.
(3) Stitcher.py generates a request RSpec for each of the aggregates in the path to request both network and compute resources.
(4) Request at Internet2/ION waits for DCN circuits. If this request fails, stitcher.py will try again after 600 seconds.
(5) A combined manifest rspec is assembled by the stitcher.py to show all aggregates and VLANs used in the sliver.

To combined manifest ig-gpo-ig-utah-manifest-rspec-stitching-combined.xml is attached.

Below is part of the ig-gpo-ig-utah-manifest-rspec-stitching-combined.xml file showing the stitching portion of the manifest that includes all hops hops along the stitched VLAN path:

        <stitching lastUpdateTime="2013-07-16T11:34:49.472Z" xmlns="http://hpn.east.isi.edu/rspec/ext/stitch/0.1/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://hpn.east.isi.edu/rspec/ext/stitch/0.1/ http://hpn.east.isi.edu/rspec/ext/stitch/0.1/stitch-schema.xsd">
                <path id="link">
                        <globalId>
        ion.internet2.edu-22931
                        </globalId>
                        <lifetime id="ion.internet2.edu-22931">
                                <start type="xgc">
          2013-07-25T00:00:00.000Z
                                </start>
                                <end type="xgc">
          2013-07-16T11:34:49.472Z
                                </end>
                        </lifetime>
                        <hop id="1">     
                                <link id="urn:publicid:IDN+instageni.gpolab.bbn.com+interface+procurve2:5.24">
                                        <trafficEngineeringMetric>
                                                10
                                        </trafficEngineeringMetric>
                                        <capacity>
                                                100000
                                        </capacity>
                                        <switchingCapabilityDescriptor>
                                                <switchingcapType>
                                                        l2sc
                                                </switchingcapType>
                                                <encodingType>
                                                        ethernet
                                                </encodingType>
                                                <switchingCapabilitySpecificInfo>
                                                        <switchingCapabilitySpecificInfo_L2sc>
                                                                <interfaceMTU>
                                                                        9000
                                                                </interfaceMTU>
                                                                <vlanRangeAvailability>
                                                                        3748
                                                                </vlanRangeAvailability>
                                                                <suggestedVLANRange>
                                                                        3748
                                                                </suggestedVLANRange>
                                                                <vlanTranslation>
                                                                        false
                                                                </vlanTranslation>
                                                        </switchingCapabilitySpecificInfo_L2sc>
                                                </switchingCapabilitySpecificInfo>
                                        </switchingCapabilityDescriptor>
                                </link>
                                <nextHop>
                                        2
                                </nextHop>
                        </hop>
                        <hop id="4">
                                <link id="urn:publicid:IDN+emulab.net+interface+procurve-pgeni-atla:3.21">
                                        <trafficEngineeringMetric>
                                                10
                                        </trafficEngineeringMetric>
                                        <capacity>
                                                100000
                                        </capacity>
                                        <switchingCapabilityDescriptor>
                                                <switchingcapType>
                                                        l2sc
                                                </switchingcapType>
                                                <encodingType>
                                                        ethernet
                                                </encodingType>
                                                <switchingCapabilitySpecificInfo>
                                                        <switchingCapabilitySpecificInfo_L2sc>
                                                                <interfaceMTU>
                                                                        9000
                                                                </interfaceMTU>
                                                                <vlanRangeAvailability>
                                                                        874
                                                                </vlanRangeAvailability>
                                                                <suggestedVLANRange>
                                                                        874
                                                                </suggestedVLANRange>
                                                                <vlanTranslation>
                                                                        false
                                                                </vlanTranslation>
                                                        </switchingCapabilitySpecificInfo_L2sc>
                                                </switchingCapabilitySpecificInfo>
                                        </switchingCapabilityDescriptor>
                                </link>
                                <nextHop>
                                        5
                                </nextHop>
                        </hop>
                        <hop id="5">
                                <link id="urn:publicid:IDN+emulab.net+interface+procurveA:3.19">
                                        <trafficEngineeringMetric>
                                                10
                                        </trafficEngineeringMetric>
                                        <capacity>
                                                100000
                                        </capacity>
                                        <switchingCapabilityDescriptor>
                                                <switchingcapType>
                                                        l2sc
                                                </switchingcapType>
                                                <encodingType>
                                                        ethernet
                                                </encodingType>
                                                <switchingCapabilitySpecificInfo>
                                                        <switchingCapabilitySpecificInfo_L2sc>
                                                                <interfaceMTU>
                                                                        9000
                                                                </interfaceMTU>
                                                                <vlanRangeAvailability>
                                                                        874
                                                                </vlanRangeAvailability>
                                                                <suggestedVLANRange>
                                                                        874
                                                                </suggestedVLANRange>
                                                                <vlanTranslation>
                                                                        false
                                                                </vlanTranslation>
                                                        </switchingCapabilitySpecificInfo_L2sc>
                                                </switchingCapabilitySpecificInfo>
                                        </switchingCapabilityDescriptor>
                                </link>
                                <nextHop>
                                        6
                                </nextHop>
                        </hop>
                        <hop id="6">
                                <link id="urn:publicid:IDN+utah.geniracks.net+interface+procurve2:1.19">
                                        <trafficEngineeringMetric>
                                                10
                                        </trafficEngineeringMetric>
                                        <capacity>
                                                100000
                                        </capacity>
                                        <switchingCapabilityDescriptor>
                                                <switchingcapType>
                                                        l2sc
                                                </switchingcapType>
                                                <encodingType>
                                                        ethernet
                                                </encodingType>
                                                <switchingCapabilitySpecificInfo>
                                                        <switchingCapabilitySpecificInfo_L2sc>
                                                                <interfaceMTU>
                                                                        9000
                                                                </interfaceMTU>
                                                                <vlanRangeAvailability>
                                                                        874
                                                                </vlanRangeAvailability>
                                                                <suggestedVLANRange>
                                                                        874
                                                                </suggestedVLANRange>
                                                                <vlanTranslation>
                                                                        false
                                                                </vlanTranslation>
                                                        </switchingCapabilitySpecificInfo_L2sc>
                                                </switchingCapabilitySpecificInfo>
                                        </switchingCapabilityDescriptor>
                                </link>
                                <nextHop>
                                        null
                                </nextHop>
                        </hop>
                </path>
        </stitching>

In the stitching definition:

  • <hop id="1"> is for the GPO InstaGENI switch (procurve2:5.24) and uses VLAN 3748.
  • <hop id="4"> is for the Internet2 switch (procurve-pgeni-atla:3.21) and uses VLAN 874
  • <hop id="5"> is for the Utah PG switch (procurveA:3.19) and uses VLAN 874
  • <hop id="6"> is for the Utah InstaGENI switch (procurve2:1.19) and uses VLAN 874

At this point the experiment has been set up and you may determine the login information at each compute aggregate:

$ readyToLogin.py ig-gpo-ig-utah -a ig-gpo        
...
server-gpo's geni_status is: ready (am_status:ready) 
User lnevers logs in to server-gpo using:

	ssh -i /home/lnevers/.ssh/geni_cert_portal_key lnevers@pcvm2-14.instageni.gpolab.bbn.com


$ readyToLogin.py ig-gpo-ig-utah -a ig-utah

client-utah's geni_status is: ready (am_status:ready) 
User lnevers logs in to client-utah using:
	ssh -p 30522  -i /home/lnevers/.ssh/geni_cert_portal_key lnevers@pc1.utah.geniracks.net

We will use the server-gpo login to determine the routable IP address that was requested for the Web Server:

$ ssh -i /home/lnevers/.ssh/geni_cert_portal_key lnevers@pcvm2-14.instageni.gpolab.bbn.com
[lnevers@server-gpo ~]$ /sbin/ifconfig
eth999    Link encap:Ethernet  HWaddr 02:1A:B9:6C:51:18  
          inet addr:192.1.242.151  Bcast:192.1.242.255  Mask:255.255.255.128  <==(a)
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:17379 errors:0 dropped:0 overruns:0 frame:0
          TX packets:9372 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:25441630 (24.2 MiB)  TX bytes:509859 (497.9 KiB)

eth3748   Link encap:Ethernet  HWaddr 02:73:1F:92:9B:C6  
          inet addr:192.168.4.1  Bcast:192.168.4.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:68 errors:0 dropped:0 overruns:0 frame:0
          TX packets:52 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:3901 (3.8 KiB)  TX bytes:27928 (27.2 KiB)

(a) publically routable IP address

You may also use the client-utah login to verify connectivity between to the server-gpo:

$ ssh -p 30522  -i /home/lnevers/.ssh/geni_cert_portal_key lnevers@pc1.utah.geniracks.net
[lnevers@client-utah ~]$ /sbin/ifconfig
eth874    Link encap:Ethernet  HWaddr 02:16:D6:8B:87:01  
          inet addr:192.168.4.2  Bcast:192.168.4.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:55 errors:0 dropped:0 overruns:0 frame:0
          TX packets:260 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:3434 (3.3 KiB)  TX bytes:323831 (316.2 KiB)

eth999    Link encap:Ethernet  HWaddr 02:DF:E2:D1:9E:24  
          inet addr:172.17.1.4  Bcast:172.31.255.255  Mask:255.240.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:15802 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7917 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:22849021 (21.7 MiB)  TX bytes:421874 (411.9 KiB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:2 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:196 (196.0 b)  TX bytes:196 (196.0 b)

[lnevers@client-utah ~]$ ping -c 5 192.168.4.1
PING 192.168.4.1 (192.168.4.1) 56(84) bytes of data.
64 bytes from 192.168.4.1: icmp_req=1 ttl=64 time=80.4 ms
64 bytes from 192.168.4.1: icmp_req=2 ttl=64 time=80.4 ms
64 bytes from 192.168.4.1: icmp_req=3 ttl=64 time=80.3 ms
64 bytes from 192.168.4.1: icmp_req=4 ttl=64 time=80.3 ms
64 bytes from 192.168.4.1: icmp_req=5 ttl=64 time=80.3 ms

--- 192.168.4.1 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4001ms
rtt min/avg/max/mdev = 80.376/80.395/80.436/0.180 ms
[lnevers@client-utah ~]$ 

We can now connected to the web server to verify that iperf test were run and that client completed wget operations from the web servers, which also is the iperf server:

[Image(web-server.jpeg)]

Select the Web Server Statistics link and verify that wget was sucessfull for images: [Image(web-server-stats.jpeg)]

Next, select the "Iperf Server Logs" link to verify that the iperf test completed:

[Image(web-server-iperf.jpeg)]

Finish the Stitching Experiment

Finish

Attachments (6)