Portal:Cloud VPS/Admin/Neutron Notes

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This page is a dumping ground for links and documentation in the process of moving Labs to using Neutron.

Preamble

http://research.esg-global.com/reportaction/blog0419201602/Toc

https://wiki.openstack.org/wiki/Meetings/TechnicalCommittee/Neutron_Gap_Coverage

https://www.quora.com/Whats-the-difference-between-the-OpenStack-Networking-neutron-and-the-Legacy-Networking-nova-network

https://review.openstack.org/#/c/101921/

https://docs.openstack.org/ocata/networking-guide/intro-os-networking.html

https://docs.openstack.org/admin-guide/networking-adv-features.html

Labtest Allocations

https://etherpad.wikimedia.org/p/labtestinfra

Labtest

* labtestneutron2001.codfw.wmnet

** Currently unused

** Future neutron network controller host

* labtestvirt2001.codfw.wmnet

** Compute node

** Runs nova-compute

** Has space for 4 or 5 smallish VMs

* labtestnet2001.codfw.wmnet

** Current network host and api server

** Runs nova-api

** Runs nova-network

* labtestmetal2001.codfw.wmnet

** Currently unused

** Potential experimental host for openstack 'ironic'

* labtestcontrol2001.wikimedia.org

** Openstack controller node

** Runs keystone API and all keystone services

** Runs nova scheduler

** Runs nova conductor

** Hosts all OpenStack databases for labtest

** Hosts puppetmaster for all labtest VMs

* labtestservices2001.wikimedia.org

** Ldap/DNS server

** Runs pdns

** Runs all designate services

* labtestweb2001.wikimedia.org

** Web UI frontend for labtest

** Runs Horizon test instance

** Runs Wikitech test instance

https://labtestwikitech.wikimedia.org/wiki/Main_Page

https://labtesthorizon.wikimedia.org/auth/login/?next=/project/instances/

Open questions

  • /etc/nova/nova-compute.conf is managed but unused?
  • Can the migration be performed online? (as in data plane)
  • Should we use linux bridging or OpenVSwitch?
    • Linux bridging is simpler conceptually and component wise but not as featurefull.
    • What Neutron plugin should we use?
  • What type and mechanism should we use?
  • Does L2 Population work as expected?
  • VXLAN
    • Overhead
    • debugging

Conceptual

http://events.linuxfoundation.org/sites/events/files/slides/LinuxConJapan2014_makita_0.pdf

http://www.opencloudblog.com/?p=96

http://www.sparkmycloud.com/blog/openstack-vlan-networking-overview/

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux_openstack_platform/7/html/networking_guide/

Topology

https://docs.openstack.org/mitaka/install-guide-ubuntu/neutron-controller-install-option2.html

The shared switch is a Boolean value that, when set to true, allows a network to be utilized among all tenants. This attribute is available only for networks created by administrators and is not available for networks created by users.

Denton, James (2015-11-27). Learning OpenStack Networking (Neutron) - Second Edition (p. 129). Packt Publishing. Kindle Edition.

Neutron l2/l3 agents https://www.youtube.com/watch?v=uNAkDfkTGBw

Migration(s)

https://docs.openstack.org/kilo/networking-guide/migration.html

https://specs.openstack.org/openstack/neutron-specs/specs/kilo-backlog/migration-from-nova-net.html

https://docs.openstack.org/liberty/networking-guide/migration-nova-network-to-neutron.html

  • General overview of transition mechanics with no real technical insight
  • assumes things exist and are working such as 'Run a DB dump/restore tool that creates Networking data structures representing current legacy networking config.'

https://wiki.openstack.org/wiki/Neutron/MigrationFromNovaNetwork/HowTo#How_to_test_migration_process

Spec for Neutron Migration feature (permanent -2?)

http://lists.openstack.org/pipermail/openstack/2017-March/018903.html (andrew asking for migration stories)

https://www.rivy.org/2012/11/switch-your-kvm-from-regular-bridge-to-open-vswitch/

https://github.com/NeCTAR-RC/novanet2neutron

https://www.youtube.com/watch?v=54wp1yzC-d8 (cern migration story)

http://superuser.openstack.org/articles/ebay-in-production-migration-from-nova-network-to-neutron/

https://www.slideshare.net/ChengyuanLi/seamless-migration-from-nova-network-to-neutron-in-e-bay-production20141104

https://blueprints.launchpad.net/neutron/+spec/allow-specific-floating-ip-address

http://www.stillhq.com/openstack/juno/000014.html

OpenVSwitch

http://docs.openvswitch.org/en/latest/faq/issues/

https://media.readthedocs.org/pdf/openvswitch/latest/openvswitch.pdf

https://pve.proxmox.com/wiki/Open_vSwitch

Managing Open vSwitch across a large heterogenous fleet (rackspace)

  • 2.1+ described as best and ubuntu seems to be on 2.0 (flow-eviction-thresholds) via apt-cache
  • 2.3 is OVS LTS

http://manpages.ubuntu.com/manpages/trusty/man8/ovs-controller.8.html

Linux Bridging

https://docs.openstack.org/kilo/networking-guide/scenario_legacy_lb.html (LEGACY)

https://robhirschfeld.com/2013/10/16/openstack-neutron-using-linux-bridges-technical-explanation/ (2013...)

http://man7.org/linux/man-pages/man8/bridge.8.html

http://www.microhowto.info/troubleshooting/troubleshooting_ethernet_bridging_on_linux.html

https://docs.openstack.org/kilo/networking-guide/scenario_l3ha_lb.html

https://docs.openstack.org/kilo/networking-guide/deploy_scenario4b.html

https://wiki.linuxfoundation.org/networking/bridge

http://www.linuxjournal.com/article/8172

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/s2-networkscripts-interfaces_network-bridge.html

https://wiki.aalto.fi/download/attachments/70789083/linux_bridging_review.pdf

ML2 Linux Bridging

https://wiki.openstack.org/wiki/Neutron-Linux-Bridge-Plugin (older docs seems redirected from old monolithic plugin)

https://github.com/openstack/neutron/blob/master/neutron/plugins/ml2/drivers/linuxbridge/agent/linuxbridge_neutron_agent.py

VXLAN

http://events.linuxfoundation.org/sites/events/files/slides/2013-linuxcon.pdf

https://kimizhang.wordpress.com/2014/04/01/how-ml2vxlan-works/

http://openstack.fr/r/meetup7/OpenStack-Neutron-l2-pop-Linux-VXLAN-Edouard-Thuleau.pdf

https://www.kernel.org/doc/Documentation/networking/vxlan.txt

OpenVSwitch vs Linux Bridging

https://github.com/openvswitch/ovs/blob/master/Documentation/intro/why-ovs.rst

https://ask.openstack.org/en/question/98644/openvswitch-vs-linux-bridge-network-deployment/

https://www.quora.com/What-is-the-major-difference-between-OVS-and-linux-bridge

https://kumul.us/switches-ovs-vs-linux-bridge-simplicity-rules/

Migrating Production Workloads from OVS to Linux Bridge w/ ML2 (RS internal cloud)

https://www.slideshare.net/JamesDenton1/2014-openstack-summit-neutron-ovs-to-linuxbridge-migration

ML2: The Plugin Of Plugins

https://docs.openstack.org/ocata/networking-guide/config-ml2.html

https://wiki.openstack.org/wiki/Neutron/ML2

https://wiki.openstack.org/wiki/Neutron/ML2#Multi-Segment_Networks

  • Virtual networks can be composed of multiple segments of the same or different types.
    • EXCEPT: The database schema and driver APIs support multi-segment networks, but the client API for multi-segment networks is not yet implemented.

https://wiki.openstack.org/wiki/Neutron/ModularL2Agent (original spec)

http://docs.ocselected.org/openstack-manuals/kilo/networking-guide/content/ml2_l2pop_scenarios.html

https://docs.openstack.org/ocata/config-reference/networking/networking_options_reference.html#modular-layer-2-ml2-plug-in-configuration-options

https://assafmuller.com/2014/02/23/ml2-address-population/

Next Phases

https://docs.openstack.org/newton/networking-guide/config-bgp-dynamic-routing.html

Associated

Neutron Planning/ldap

Misc Reference

https://kimizhang.wordpress.com/2014/04/01/how-ml2vxlan-works/

https://docs.openstack.org/developer/nova/man/nova-dhcpbridge.html

https://www.ovirt.org/

https://thornelabs.net/2014/03/13/openstack-commands-cheat-sheet.html

https://docs.openstack.org/user-guide/cli-cheat-sheet.html

http://ebtables.netfilter.org/documentation/features.html

Sub Pages

Portal:Wikimedia_VPS/Admin/Neutron_Notes/ldap ldap