Ubuntu 16.04
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OpenStack Mitaka : Neutron Network (FLAT)
2016/05/28
 
Configure virtual networking by OpenStack Network Service (Neutron).
For example, configure FLAT type of provider networking on here.
Before it, Configure basic settings on Control Node, Network Node, Compute Node.
Furthermore, this example is based on the environment that Network Node and Compute Node have 2 network interfaces.

                                        |
  +-------------+                  +----+----+
  | Name Server |                  | Gateway |
  +------+------+                  +----+----+
         |10.0.0.10                     |10.0.0.1
         |                              |
         +------------+-----------------+------------------+
         |            |                 |                  |     10.0.0.200-10.0.0.250
     eth0|10.0.0.30   |             eth0|10.0.0.50         |         +-----------------+
+--------+---------+  |     +-----------+----------+       |     +---| Virtual Machine |
| [ Control Node ] |  |     |   [ Network Node ]   |       |     |   +-----------------+
|     Keystone     |  |     |       DHCP Agent     |       |     |   +-----------------+
|      Glance      |  |     |       L3 Agent       |eth1   |     |---| Virtual Machine |
|     Nova API     |  |     |       L2 Agent       |       |     |   +-----------------+
|  Neutron Server  |  |     |    Metadata Agent    |       |     |   +-----------------+
+------------------+  |     +----------------------+       +-----+---| Virtual Machine |
                      |                                          |   +-----------------+
                      |     +----------------------+             |   +-----------------+
                      | eth0|   [ Compute Node ]   |             |---| Virtual Machine |
                      +-----|     Nova Compute     |eth1         |   +-----------------+
                   10.0.0.51|       L2 Agent       |             |   +-----------------+
                            +----------------------+             +---| Virtual Machine |
                                                                     +-----------------+

[1] Change settings like follows on both Network Node and Compute Node.
root@network:~#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# line 152: add

[ml2_type_flat]
flat_networks = physnet1
root@network:~#
vi /etc/neutron/plugins/ml2/linuxbridge_agent.ini
# line 128: add

[linux_bridge]
physical_interface_mappings = physnet1:eth1
# line 171: uncomment and change

enable_vxlan =
false
root@network:~#
systemctl restart neutron-linuxbridge-agent

[2] Create network. It's OK to work on any node. (This example is on Control Node)
root@dlp ~(keystone)#
tenantID=`openstack project list | grep service | awk '{print $2}'`
# create network named "sharednet1"

root@dlp ~(keystone)#
neutron net-create --tenant-id $tenantID sharednet1 \
--shared --provider:network_type flat --provider:physical_network physnet1

Created a new network:
+---------------------------+--------------------------------------+
| Field                     | Value                                |
+---------------------------+--------------------------------------+
| admin_state_up            | True                                 |
| availability_zone_hints   |                                      |
| availability_zones        |                                      |
| created_at                | 2016-05-29T16:01:56                  |
| description               |                                      |
| id                        | 8579942d-402f-403a-9713-be18b9bc546a |
| ipv4_address_scope        |                                      |
| ipv6_address_scope        |                                      |
| mtu                       | 1500                                 |
| name                      | sharednet1                           |
| port_security_enabled     | True                                 |
| provider:network_type     | flat                                 |
| provider:physical_network | physnet1                             |
| provider:segmentation_id  |                                      |
| router:external           | False                                |
| shared                    | True                                 |
| status                    | ACTIVE                               |
| subnets                   |                                      |
| tags                      |                                      |
| tenant_id                 | 004097e8a2da45e6a68f6474b5bd7207     |
| updated_at                | 2016-05-29T16:01:56                  |
+---------------------------+--------------------------------------+

# create subnet "10.0.0.0/24" in "sharednet1"

root@dlp ~(keystone)#
neutron subnet-create \
--tenant-id $tenantID --gateway 10.0.0.1 --dns-nameserver 10.0.0.1 \
--allocation-pool start=10.0.0.200,end=10.0.0.250 sharednet1 10.0.0.0/24

Created a new subnet:
+-------------------+----------------------------------------------+
| Field             | Value                                        |
+-------------------+----------------------------------------------+
| allocation_pools  | {"start": "10.0.0.200", "end": "10.0.0.250"} |
| cidr              | 10.0.0.0/24                                  |
| created_at        | 2016-05-29T16:02:12                          |
| description       |                                              |
| dns_nameservers   | 10.0.0.1                                     |
| enable_dhcp       | True                                         |
| gateway_ip        | 10.0.0.1                                     |
| host_routes       |                                              |
| id                | 24723118-8f1e-4530-aca7-b1dca4b6995d         |
| ip_version        | 4                                            |
| ipv6_address_mode |                                              |
| ipv6_ra_mode      |                                              |
| name              |                                              |
| network_id        | 8579942d-402f-403a-9713-be18b9bc546a         |
| subnetpool_id     |                                              |
| tenant_id         | 004097e8a2da45e6a68f6474b5bd7207             |
| updated_at        | 2016-05-29T16:02:12                          |
+-------------------+----------------------------------------------+

# confirm settings

root@dlp ~(keystone)#
neutron net-list

+--------------------------------------+------------+--------------------------------------------------+
| id                                   | name       | subnets                                          |
+--------------------------------------+------------+--------------------------------------------------+
| 8579942d-402f-403a-9713-be18b9bc546a | sharednet1 | 24723118-8f1e-4530-aca7-b1dca4b6995d 10.0.0.0/24 |
+--------------------------------------+------------+--------------------------------------------------+
[3] Create and start a Virtual machine Instance with the network just created above.
root@dlp ~(keystone)#
netID=`neutron net-list | grep sharednet1 | awk '{print $2}'`

root@dlp ~(keystone)#
nova image-list

+--------------------------------------+------------+--------+--------+
| ID                                   | Name       | Status | Server |
+--------------------------------------+------------+--------+--------+
| d7e743c4-c1f5-458b-abc5-2d9176c07a93 | Ubuntu1604 | ACTIVE |        |
+--------------------------------------+------------+--------+--------+

root@dlp ~(keystone)#
nova boot --flavor 2 --image Ubuntu1604 --security-groups default --nic net-id=$netID Ubuntu_1604
root@dlp ~(keystone)#
nova list

+--------------------------------------+-------------+--------+------------+-------------+-----------------------+
| ID                                   | Name        | Status | Task State | Power State | Networks              |
+--------------------------------------+-------------+--------+------------+-------------+-----------------------+
| c600c707-59b2-4377-a2a0-830a13713b83 | Ubuntu_1604 | ACTIVE | -          | Running     | sharednet1=10.0.0.201 |
+--------------------------------------+-------------+--------+------------+-------------+-----------------------+
[4] Configure security settings like follows to access with SSH and ICMP.
# permit ICMP

root@dlp ~(keystone)#
neutron security-group-rule-create --direction ingress --protocol icmp default

Created a new security_group_rule:
+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| description       |                                      |
| direction         | ingress                              |
| ethertype         | IPv4                                 |
| id                | 67699149-a85e-4334-91cc-48865147b7fd |
| port_range_max    |                                      |
| port_range_min    |                                      |
| protocol          | icmp                                 |
| remote_group_id   |                                      |
| remote_ip_prefix  |                                      |
| security_group_id | 04d72bc2-a73e-4803-b93a-0e22e69bae9f |
| tenant_id         | 61bb62a97e394b8db8f95aa05a678771     |
+-------------------+--------------------------------------+

# permit SSH

root@dlp ~(keystone)#
neutron security-group-rule-create --direction ingress --protocol tcp --port_range_min 22 --port_range_max 22 default

Created a new security_group_rule:
+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| description       |                                      |
| direction         | ingress                              |
| ethertype         | IPv4                                 |
| id                | 492eb253-3314-420a-98ee-3d652aecbe86 |
| port_range_max    | 22                                   |
| port_range_min    | 22                                   |
| protocol          | tcp                                  |
| remote_group_id   |                                      |
| remote_ip_prefix  |                                      |
| security_group_id | 04d72bc2-a73e-4803-b93a-0e22e69bae9f |
| tenant_id         | 61bb62a97e394b8db8f95aa05a678771     |
+-------------------+--------------------------------------+

root@dlp ~(keystone)#
neutron security-group-rule-list

+--------------------------------------+----------------+-----------+-----------+---------------+-----------------+
| id                                   | security_group | direction | ethertype | port/protocol | remote          |
+--------------------------------------+----------------+-----------+-----------+---------------+-----------------+
| 492eb253-3314-420a-98ee-3d652aecbe86 | default        | ingress   | IPv4      | 22/tcp        | any             |
| 67699149-a85e-4334-91cc-48865147b7fd | default        | ingress   | IPv4      | icmp          | any             |
| 6976acfc-c439-44f1-b8a1-be9b917ebef2 | default        | ingress   | IPv4      | any           | default (group) |
| 710640ac-f8ac-4d29-b708-861476758f83 | default        | ingress   | IPv6      | any           | default (group) |
| 7ab15e66-e89b-4c72-b7b9-a7a216d14a81 | default        | egress    | IPv4      | any           | any             |
| 825efe36-22a0-4037-9cb9-3622b798fea0 | default        | egress    | IPv6      | any           | any             |
+--------------------------------------+----------------+-----------+-----------+---------------+-----------------+
[5] Login to Instance.
root@dlp ~(keystone)#
ssh xerus@10.0.0.201

The authenticity of host '10.0.0.201 (10.0.0.201)' can't be established.
ECDSA key fingerprint is SHA256:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '10.0.0.201' (ECDSA) to the list of known hosts.
xerus@10.0.0.201's password:
Welcome to Ubuntu 16.04 LTS (GNU/Linux 4.4.0-22-generic x86_64)

 * Documentation:  https://help.ubuntu.com/

0 packages can be updated.
0 updates are security updates.

The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

xerus@ubuntu:~$    
# just logined
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