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I do believe it is just an arbitrary uuid.  I don't know the decision
behind doing it this way, but I'm sure there were reasons.  Or maybe
not :)

https://github.com/openstack/neutron-lbaas/blob/stable/kilo/neutron_lbaas/services/loadbalancer/drivers/common/agent_driver_base.py#L195


On Wed, 2016-02-24 at 16:43 -0800, surekha saharan wrote:
> Hello All,
> 
> 
> I can't find the "device_id" anywhere the port in vip returns.
> 
> Below is the details of a vip, note the port_id
> "03a12958-656f-492b-8114-65d037ad6743"
> 
> neutron lb-vip-show b2b11f89-48fc-4fd4-99f9-6f26977f353a
> 
> +---------------------+--------------------------------------+
> 
> | Field            | Value                             |
> 
> +---------------------+--------------------------------------+
> 
> | address          | 30.0.0.138                        |
> 
> | admin_state_up   | True                              |
> 
> | connection_limit | -1                                |
> 
> | description      |                                   |
> 
> | id               | b2b11f89-48fc-4fd4-99f9-6f26977f353a |
> 
> | name             | vip2                              |
> 
> | pool_id          | 4e0a1909-08f9-4124-94c0-ef0650b36512 |
> 
> | port_id          | 03a12958-656f-492b-8114-65d037ad6743 |
> 
> | protocol         | HTTP                              |
> 
> | protocol_port    | 80                                |
> 
> | session_persistence |                                   |
> 
> | status           | ACTIVE                            |
> 
> | status_description  |                                   |
> 
> | subnet_id        | 61ed9305-7b15-484a-b843-cb759aebc163 |
> 
> | tenant_id        | 3418d53683654d37b47caa1b66b72a21 |
> 
> +---------------------+--------------------------------------+
> 
> 
> 
> 
> 
> Now, if I get the details of the above port, I get the device_id "
> 724fc160-2b2e-597e-b9ed-7f65313cd73f". 
> The id of the vip is part of name attribute
> "vip-b2b11f89-48fc-4fd4-99f9-6f26977f353a "
> 
> 
> 
> 
> neutron port-show 03a12958-656f-492b-8114-65d037ad6743
> 
> +-----------------------+-----------------------------------------------------------------------------------+
> 
> | Field              | Value
> |
> 
> +-----------------------+-----------------------------------------------------------------------------------+
> 
> | admin_state_up     | True
> |
> 
> | allowed_address_pairs |
> |
> 
> | binding:host_id    | ubuntu
> |
> 
> | binding:profile    | {}
> |
> 
> | binding:vif_details   | {"port_filter": true, "ovs_hybrid_plug":
> true}                                 |
> 
> | binding:vif_type   | ovs
> |
> 
> | binding:vnic_type | normal
> |
> 
> | device_id          | 724fc160-2b2e-597e-b9ed-7f65313cd73f
> |
> 
> | device_owner       | neutron:LOADBALANCER
> |
> 
> | extra_dhcp_opts    |
> |
> 
> | fixed_ips          | {"subnet_id":
> "61ed9305-7b15-484a-b843-cb759aebc163", "ip_address": "30.0.0.138"} |
> 
> | id                 | 03a12958-656f-492b-8114-65d037ad6743
> |
> 
> | mac_address        | fa:16:3e:ec:2e:3b
> |
> 
> | name               | vip-b2b11f89-48fc-4fd4-99f9-6f26977f353a
> |
> 
> | network_id         | ef132b57-edc1-4d64-9591-38b80f73e23f
> |
> 
> | security_groups    | 3365e9e0-4038-4800-b6b3-364b34e177d1
> |
> 
> | status             | ACTIVE
> |
> 
> | tenant_id          | 3418d53683654d37b47caa1b66b72a21
> |
> 
> +-----------------------+-----------------------------------------------------------------------------------+
> 
> 
> 
> I cannot find the device_id anywhere as part of "nova list" or any
> other neutron command, what is this device_id referring to.
> 
> 
> Appreciate any response on this.
> 
> 
> Regards,
> 
> Surekha
> 
> 
> 
> 
> 
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