Gestión de redes con neutron

En la última demostración vamos a crear una nueva red, un nuevo router y una instancia conectada a esta nueva red. Será necesario tener instalado el cliente python-neutronclient como se explica en la sección de conceptos previos. Veamos los pasos que tenemos que seguir:

  1. Vemos las redes, subredes y routers que tenemos en nuestro proyecto:

     neutron net-list
 +--------------------------------------+--------------+-----------------------------------------------------+
 | id                                   | name         | subnets                                             |
 +--------------------------------------+--------------+-----------------------------------------------------+
 | d15e0eb6-c892-4717-8be1-b3e85795e8c9 | ext-net      | c80b173f-c203-4e63-956a-ed7351a5a073 185.45.72.0/23 |
 | d5d686b5-32fb-4e45-8809-98df3ee5ef3e | 00000061-net | 4751dc7e-6b54-4284-ba02-6c1a44deb076 10.0.15.64/26  |
 +--------------------------------------+--------------+-----------------------------------------------------+

 neutron subnet-list
 +--------------------------------------+-----------------+----------------+---------------------------------------------------+
 | id                                   | name            | cidr           | allocation_pools                                  |
 +--------------------------------------+-----------------+----------------+---------------------------------------------------+
 | 4751dc7e-6b54-4284-ba02-6c1a44deb076 | 00000061-subnet | 10.0.15.64/26  | {"start": "10.0.15.66", "end": "10.0.15.126"}     |
 | c80b173f-c203-4e63-956a-ed7351a5a073 | ext-net         | 185.45.72.0/23 | {"start": "185.45.72.17", "end": "185.45.73.254"} |
 +--------------------------------------+-----------------+----------------+---------------------------------------------------+

 neutron router-list
 +--------------------------------------+---------------------+-----------------------------------------------------------------------------+
 | id                                   | name                | external_gateway_info                                                       |
 +--------------------------------------+---------------------+-----------------------------------------------------------------------------+
 | d377a1cf-e78b-472f-8235-197c107b9e5d | 00000061-ext-router | {"network_id": "d15e0eb6-c892-4717-8be1-b3e85795e8c9", "enable_snat": true} |
 +--------------------------------------+---------------------+-----------------------------------------------------------------------------+

  2. Creamos una red de nombre mi_red con una subred asociada con el direccionamiento 192.168.0.0/24:

     neutron net-create mi_red
 Created a new network:
 +----------------+--------------------------------------+
 | Field          | Value                                |
 +----------------+--------------------------------------+
 | admin_state_up | True                                 |
 | id             | 44925468-3181-490e-8d81-6c1012aba2e8 |
 | name           | mi_red                               |
 | shared         | False                                |
 | status         | ACTIVE                               |
 | subnets        |                                      |
 | tenant_id      | 44f5cb63ad34481aab5cc9c2809e4a76     |
 +----------------+--------------------------------------+

 neutron subnet-create mi_red 192.168.0.0/24 --name mi_subred
 Created a new subnet:
 +------------------+--------------------------------------------------+
 | Field            | Value                                            |
 +------------------+--------------------------------------------------+
 | allocation_pools | {"start": "192.168.0.2", "end": "192.168.0.254"} |
 | cidr             | 192.168.0.0/24                                   |
 | dns_nameservers  |                                                  |
 | enable_dhcp      | True                                             |
 | gateway_ip       | 192.168.0.1                                      |
 | host_routes      |                                                  |
 | id               | e0e4b108-ac13-4827-86fd-a8ea325057cc             |
 | ip_version       | 4                                                |
 | name             |                                                  |
 | network_id       | 44925468-3181-490e-8d81-6c1012aba2e8             |
 | tenant_id        | 44f5cb63ad34481aab5cc9c2809e4a76                 |
 +------------------+--------------------------------------------------+

  3. Creamos un nuevo router (mi_router), que vamos a conectar con la red externa y con la subred anteriormente creada:

     neutron router-create mi_router
 Created a new router:
 +-----------------------+--------------------------------------+
 | Field                 | Value                                |
 +-----------------------+--------------------------------------+
 | admin_state_up        | True                                 |
 | external_gateway_info |                                      |
 | id                    | 4e179266-06b1-46d4-a0f7-f3e2f06bc7d3 |
 | name                  | mi_router                            |
 | status                | ACTIVE                               |
 | tenant_id             | 44f5cb63ad34481aab5cc9c2809e4a76     |
 +-----------------------+--------------------------------------+

    Coenctamos el router a la red externa:

     neutron router-gateway-set mi_router ext-net

    Conectamos el router a la red:

     neutron router-interface-add mi_router mi_subred

    Para listar los puertos:

     neutron port-list

  4. Creamos una nueva instancia conectada a la nueva red y le asignamos una ip pública.

     nova boot --flavor ssd.XXXS \
 --image 44288012-b805-455f-a21f-74ab36c46362 \
 --security-groups gr_seguridad \
 --key-name clave_acceso \
 --nic net-id=44925468-3181-490e-8d81-6c1012aba2e8 \
 otra_instancia
 +--------------------------------------+---------------------------------------------------------------------------------+
 | Property                             | Value                                                                           |
 +--------------------------------------+---------------------------------------------------------------------------------+
 | OS-DCF:diskConfig                    | MANUAL                                                                          |
 | OS-EXT-AZ:availability_zone          | nova                                                                            |
 | OS-EXT-STS:power_state               | 0                                                                               |
 | OS-EXT-STS:task_state                | scheduling                                                                      |
 | OS-EXT-STS:vm_state                  | building                                                                        |
 | OS-SRV-USG:launched_at               | -                                                                               |
 | OS-SRV-USG:terminated_at             | -                                                                               |
 | accessIPv4                           |                                                                                 |
 | accessIPv6                           |                                                                                 |
 | adminPass                            | iwWBVxtYcv4R                                                                    |
 | config_drive                         |                                                                                 |
 | created                              | 2014-10-23T08:15:15Z                                                            |
 | flavor                               | ssd.XXXS (20)                                                                   |
 | hostId                               |                                                                                 |
 | id                                   | ae5a8cea-2c6c-4666-a02b-1d246d97caa5                                            |
 | image                                | Ubuntu 14.04 LTS - Trusty Tahr - 64 bits (44288012-b805-455f-a21f-74ab36c46362) |
 | key_name                             | clave_acceso                                                                    |
 | metadata                             | {}                                                                              |
 | name                                 | otra_instancia                                                                  |
 | os-extended-volumes:volumes_attached | []                                                                              |
 | progress                             | 0                                                                               |
 | security_groups                      | gr_seguridad                                                                    |
 | status                               | BUILD                                                                           |
 | tenant_id                            | 44f5cb63ad34481aab5cc9c2809e4a76                                                |
 | updated                              | 2014-10-23T08:15:16Z                                                            |
 | user_id                              | 7a15970a225d41babb750da8a6f5e8d2                                                |
 +--------------------------------------+---------------------------------------------------------------------------------+

 nova show otra_instancia
 +--------------------------------------+---------------------------------------------------------------------------------+
 | Property                             | Value                                                                           |
 +--------------------------------------+---------------------------------------------------------------------------------+
 | OS-DCF:diskConfig                    | MANUAL                                                                          |
 | OS-EXT-AZ:availability_zone          | nova                                                                            |
 | OS-EXT-STS:power_state               | 1                                                                               |
 | OS-EXT-STS:task_state                | -                                                                               |
 | OS-EXT-STS:vm_state                  | active                                                                          |
 | OS-SRV-USG:launched_at               | 2014-10-23T08:15:25.000000                                                      |
 | OS-SRV-USG:terminated_at             | -                                                                               |
 | accessIPv4                           |                                                                                 |
 | accessIPv6                           |                                                                                 |
 | config_drive                         |                                                                                 |
 | created                              | 2014-10-23T08:15:15Z                                                            |
 | flavor                               | ssd.XXXS (20)                                                                   |
 | hostId                               | 962db8c7b201499f39eeea5cb2c88d73cae9931aa8703e1d3e2c8027                        |
 | id                                   | ae5a8cea-2c6c-4666-a02b-1d246d97caa5                                            |
 | image                                | Ubuntu 14.04 LTS - Trusty Tahr - 64 bits (44288012-b805-455f-a21f-74ab36c46362) |
 | key_name                             | clave_acceso                                                                    |
 | metadata                             | {}                                                                              |
 | mi_red network                       | 192.168.0.2                                                                     |
 | name                                 | otra_instancia                                                                  |
 | os-extended-volumes:volumes_attached | []                                                                              |
 | progress                             | 0                                                                               |
 | security_groups                      | gr_seguridad                                                                    |
 | status                               | ACTIVE                                                                          |
 | tenant_id                            | 44f5cb63ad34481aab5cc9c2809e4a76                                                |
 | updated                              | 2014-10-23T08:15:25Z                                                            |
 | user_id                              | 7a15970a225d41babb750da8a6f5e8d2                                                |
 +--------------------------------------+---------------------------------------------------------------------------------+

 nova floating-ip-create ext-net
 +-------------+-----------+----------+---------+
 | Ip          | Server Id | Fixed Ip | Pool    |
 +-------------+-----------+----------+---------+
 | 185.45.73.4 | -         | -        | ext-net |
 +-------------+-----------+----------+---------+
 
 nova floating-ip-associate otra_instancia 185.45.73.4