ML2_MD_BP: bp/fsl-sdn-os-mech-driver
Change-Id: I707093ab09e9738b5e63ea928ead1cddc7f10386
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=====================================================
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Freescale SDN Mechanism Driver for Neutron ML2 plugin
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=====================================================
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https://blueprints.launchpad.net/neutron/+spec/fsl-sdn-os-mech-driver
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FSL-SDN MD : Freescale SDN Mechanism Driver
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CRD : Cloud Resource Discovery Service - like neutron,
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uses keystone authentication for all ReSTful calls.
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Freescale SDN (FSL-SDN) Mechanism Driver proxies ReSTful calls (formatted for
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CRD Service) from ML2 plugin of Neutron to CRD Service.
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It supports the Cloud Resource Discovery (CRD) service by updating
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the Network, Subnet and Port Create/Update/Delete data into the CRD database.
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CRD service manages network nodes, virtual network appliances and openflow
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controller network applications.
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The basic work flow is as shown below.
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::
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+---------------------------------+
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| |
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| Neutron Server |
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| (with ML2 plugin) |
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| |
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| +-------------------------------+
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| | Freescale SDN |
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| | Mechanism Driver |
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+-+--------+----------------------+
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| ReST API
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+----------+-------------+
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| CRD server |
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+------------------------+
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Problem description
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===================
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Openstack neutron based networks and ports information is required by
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CRD service to managed virtual network appliances and openflow controller
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apps.
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In order to send this information from neutron service, a new ML2
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mechanism driver is required to post the _postcommit data to the CRD
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service.
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Proposed change
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===============
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Freescale Mechanism driver handles the following postcommit operations.
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Network create/update/delete
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Subnet create/update/delete
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Port create/delete
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Supported network types by FSL OF Controller include vlan and vxlan.
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Freescale SDN mechanism driver handles VM port binding within in the
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mechanism driver (like ODL MD).
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'bind_port' functions verifies the supported network types (vlan,vxlan)
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and calls context.set_binding with binding details.
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Freescale Openflow Controller manages the flows required on OVS.
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Sequence flow of events for create_network is as follows:
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::
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create_network
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{
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neutron -> ML2_plugin
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ML2_plugin -> FSL-SDN-MD
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FSL-SDN-MD -> crd_service
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FSL-SDN-MD <-- crd_service
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ML2_plugin <-- FSL-SDN-MD
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neutron <-- ML2_plugin
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}
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Port binding task is handled within the mechanism driver, So OVS agent driver
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is not required when this mechanism driver is enabled.
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Alternatives
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------------
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None
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Data model impact
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-----------------
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None
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REST API impact
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---------------
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None
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Security impact
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---------------
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None
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Notifications impact
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--------------------
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None
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Other end user impact
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---------------------
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None
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Performance Impact
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------------------
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Negligible/None
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Though data is sent from mechansim driver to CRD service, the performance
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impact is negligible(less than 1%) or None.
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Other deployer impact
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---------------------
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This change doesn't take immediate effect.
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To work with the change, neutron need to be configured with ml2,
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and fslsdn as mechanism driver with CRD service running.
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The following configuration changes are to be made to enable
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Freescale SDN mechanism driver.
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In [ml2] section of /etc/neutron/plugins/ml2/ml2_conf.ini,
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modify 'mechanism_drivers' attributes as,
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::
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mechanism_drivers = fslsdn
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Update /etc/neutron/plugins/ml2/ml2_conf_fslsdn.ini, as below.
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::
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[ml2_fslsdn]
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crd_auth_strategy = keystone
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crd_url = http://127.0.0.1:9797
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crd_auth_url = http://127.0.0.1:5000/v2.0/
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crd_tenant_name = service
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crd_password = <-service-password->
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crd_user_name = <-service-username->
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CRD service must be running in the Controller.
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Developer impact
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----------------
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None.
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Implementation
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==============
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Assignee(s)
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-----------
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Primary assignee:
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trinath-somanchi
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Other contributors:
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None
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Work Items
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----------
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- Mechanism Driver (mechanism_fslsdn.py)
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Dependencies
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============
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None
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Testing
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=======
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- Complete Unit testing coverage of the code is included.
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- For tempest test coverage, 3rd party testing is provided (Freesacle CI).
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- Freescale CI reports on all changes affecting this driver.
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- Testing is done using devstack and CRD service.
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- CRD service logs are also posted into the CI log repository.
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Documentation Impact
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====================
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Configuration Reference guide will be updated from the code.
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References
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==========
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None
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