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[Neutron] Split Network node from controller Node


Hi,

Please check in neutron-l3 agent logs on new host if all was configured properly.
Also, are You trying to ping VM via floating IP or fixed one? If floating IP is not working, please check from qdhcp- and qrouter- namespaces if fixed IP is working fine or not.
If fixed IP is not reachable from there, check on this new host if L2 agent (ovs agent) configured everything properly. 

> WiadomoÅ?Ä? napisana przez Zufar Dhiyaulhaq <zufar at onf-ambassador.org> w dniu 11.02.2019, o godz. 17:46:
> 
> Hi
> 
> Thank you for your answer,
> I just install the network agent in a network node,
> 
> with this following package
> 	â?¢ openstack-neutron.noarch
> 	â?¢ openstack-neutron-common.noarch
> 	â?¢ openstack-neutron-openvswitch.noarch
> 	â?¢ openstack-neutron-metering-agent.noarch
> and configuring and appear in the agent list
> 
> [root at zu-controller1 ~(keystone_admin)]# openstack network agent list
> +--------------------------------------+--------------------+----------------+-------------------+-------+-------+---------------------------+
> | ID                                   | Agent Type         | Host           | Availability Zone | Alive | State | Binary                    |
> +--------------------------------------+--------------------+----------------+-------------------+-------+-------+---------------------------+
> | 025f8a15-03b5-421e-94ff-3e07fc1317b5 | Open vSwitch agent | zu-compute2    | None              | :-)   | UP    | neutron-openvswitch-agent |
> | 04af3150-7673-4ac4-9670-fd1505737466 | Metadata agent     | zu-network1    | None              | :-)   | UP    | neutron-metadata-agent    |
> | 11a9c764-e53d-4316-9801-fa2a931f0572 | Open vSwitch agent | zu-compute1    | None              | :-)   | UP    | neutron-openvswitch-agent |
> | 1875a93f-09df-4c50-8660-1f4dc33b228d | L3 agent           | zu-controller1 | nova              | :-)   | UP    | neutron-l3-agent          |
> | 1b492ed7-fbc2-4b95-ba70-e045e255a63d | L3 agent           | zu-network1    | nova              | :-)   | UP    | neutron-l3-agent          |
> | 2fb2a714-9735-4f78-8019-935cb6422063 | Metering agent     | zu-network1    | None              | :-)   | UP    | neutron-metering-agent    |
> | 3873fc10-1758-47e9-92b8-1e8605651c70 | Open vSwitch agent | zu-network1    | None              | :-)   | UP    | neutron-openvswitch-agent |
> | 4b51bdd2-df13-4a35-9263-55e376b6e2ea | Metering agent     | zu-controller1 | None              | :-)   | UP    | neutron-metering-agent    |
> | 54af229f-3dc1-49db-b32a-25f3fd62c010 | DHCP agent         | zu-controller1 | nova              | :-)   | UP    | neutron-dhcp-agent        |
> | 9337c72b-8703-4c80-911b-106abe51ffbd | DHCP agent         | zu-network1    | nova              | :-)   | UP    | neutron-dhcp-agent        |
> | a3c78231-027d-4ddd-8234-7afd1d67910e | Metadata agent     | zu-controller1 | None              | :-)   | UP    | neutron-metadata-agent    |
> | aeb7537e-98af-49f0-914b-204e64cb4103 | Open vSwitch agent | zu-controller1 | None              | :-)   | UP    | neutron-openvswitch-agent |
> +--------------------------------------+--------------------+----------------+-------------------+-------+-------+---------------------------+
> 
> I try to migrate the network (external & internal) and router into zu-network1 (my new network node). 
> and success
> 
> [root at zu-controller1 ~(keystone_admin)]# openstack network agent list --router $ROUTER_ID
> +--------------------------------------+------------+-------------+-------------------+-------+-------+------------------+
> | ID                                   | Agent Type | Host        | Availability Zone | Alive | State | Binary           |
> +--------------------------------------+------------+-------------+-------------------+-------+-------+------------------+
> | 1b492ed7-fbc2-4b95-ba70-e045e255a63d | L3 agent   | zu-network1 | nova              | :-)   | UP    | neutron-l3-agent |
> +--------------------------------------+------------+-------------+-------------------+-------+-------+------------------+
> [root at zu-controller1 ~(keystone_admin)]# openstack network agent list --network $NETWORK_INTERNAL
> 
> +--------------------------------------+------------+-------------+-------------------+-------+-------+--------------------+
> | ID                                   | Agent Type | Host        | Availability Zone | Alive | State | Binary             |
> +--------------------------------------+------------+-------------+-------------------+-------+-------+--------------------+
> | 9337c72b-8703-4c80-911b-106abe51ffbd | DHCP agent | zu-network1 | nova              | :-)   | UP    | neutron-dhcp-agent |
> +--------------------------------------+------------+-------------+-------------------+-------+-------+--------------------+
> [root at zu-controller1 ~(keystone_admin)]# openstack network agent list --network $NETWORK_EXTERNAL
> +--------------------------------------+------------+-------------+-------------------+-------+-------+--------------------+
> | ID                                   | Agent Type | Host        | Availability Zone | Alive | State | Binary             |
> +--------------------------------------+------------+-------------+-------------------+-------+-------+--------------------+
> | 9337c72b-8703-4c80-911b-106abe51ffbd | DHCP agent | zu-network1 | nova              | :-)   | UP    | neutron-dhcp-agent |
> +--------------------------------------+------------+-------------+-------------------+-------+-------+--------------------+
> 
> But, I cannot ping my instance after the migration.
> I don't know why.
> 
> ii check my DHCP and router has already moved.
> 
> [root at zu-controller1 ~(keystone_admin)]# ip netns
> [root at zu-controller1 ~(keystone_admin)]# 
> 
> [root at zu-network1 ~]# ip netns
> qdhcp-fddd647b-3601-43e4-8299-60b703405110 (id: 1)
> qrouter-dd8ae033-0db2-4153-a060-cbb7cd18bae7 (id: 0)
> [root at zu-network1 ~]# 
> 
> What step do I miss?
> Thanks
> 
> Best Regards,
> Zufar Dhiyaulhaq
> 
> 
> On Mon, Feb 11, 2019 at 3:13 PM Slawomir Kaplonski <skaplons at redhat.com> wrote:
> Hi,
> 
> I donâ??t know if there is any tutorial for that but You can just deploy new node with agents which You need, then disable old DHCP/L3 agents with neutron API [1] and move existing networks/routers to agents in new host with neutron API. Docs for agents scheduler API is in [2] and [3].
> Please keep in mind that when You will move routers to new agent You will have some downtime in data plane.
> 
> [1] https://developer.openstack.org/api-ref/network/v2/#update-agent
> [2] https://developer.openstack.org/api-ref/network/v2/#l3-agent-scheduler
> [3] https://developer.openstack.org/api-ref/network/v2/#dhcp-agent-scheduler
> 
> > WiadomoÅ?Ä? napisana przez Zufar Dhiyaulhaq <zufar at onf-ambassador.org> w dniu 11.02.2019, o godz. 03:33:
> > 
> > Hi everyone, 
> > 
> > I Have existing OpenStack with 1 controller node (Network Node in controller node) and 2 compute node. I need to expand the architecture by splitting the network node from controller node (create 1 node for network). 
> > 
> > Do you have any recommended step or tutorial for doing this? 
> > Thanks
> > 
> > Best Regards,
> > Zufar Dhiyaulhaq
> 
> â?? 
> Slawek Kaplonski
> Senior software engineer
> Red Hat
> 

â?? 
Slawek Kaplonski
Senior software engineer
Red Hat