CentOS 8
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OpenStack Victoria : How to use Octavia2020/11/27

 
Install and Configure OpenStack Load Balancing as a Service (Octavia).
This example is based on the environment like follows.
Configured Networking is Geneve like here on this environment.
------------+---------------------------+---------------------------+------------
            |                           |                           |
        eth0|10.0.0.30              eth0|10.0.0.50              eth0|10.0.0.51
+-----------+-----------+   +-----------+-----------+   +-----------+-----------+
|    [ Control Node ]   |   |    [ Network Node ]   |   |    [ Compute Node ]   |
|                       |   |                       |   |                       |
|  MariaDB    RabbitMQ  |   |      Open vSwitch     |   |        Libvirt        |
|  Memcached  httpd     |   |     Neutron Server    |   |     Nova Compute      |
|  Keystone   Glance    |   |       OVN-Northd      |   |      Open vSwitch     |
|  Nova API             |   |    Octavia Services   |   |   OVN Metadata Agent  |
|                       |   |                       |   |     OVN-Controller    |
+-----------------------+   +-----------------------+   +-----------------------+

[1] Create Loadbalancer instance. By default, [admin] users can create instances, so work as an admin user. It's OK to work on any node. (example below is on Control Node)
[root@dlp ~(keystone)]#
openstack subnet list

+--------------------------------------+----------------+--------------------------------------+------------------+
| ID                                   | Name           | Network                              | Subnet           |
+--------------------------------------+----------------+--------------------------------------+------------------+
| db0a36a6-5be6-4609-951e-27b4d3f9f5b9 | private-subnet | 431d7888-dcde-40dc-9727-ecfa65a25366 | 192.168.100.0/24 |
| e09e5481-afaf-484e-9c7a-b24a3545d092 | public-subnet  | dae78c9d-c885-4949-a05d-8e456f9ba1b9 | 10.0.0.0/24      |
+--------------------------------------+----------------+--------------------------------------+------------------+

[root@dlp ~(keystone)]#
openstack loadbalancer create --name lb01 --vip-subnet-id private-subnet

+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| admin_state_up      | True                                 |
| availability_zone   | None                                 |
| created_at          | 2020-11-26T05:51:48                  |
| description         |                                      |
| flavor_id           | None                                 |
| id                  | 9a4aeebc-68fb-4e4e-ae5f-94ad9cb1ca44 |
| listeners           |                                      |
| name                | lb01                                 |
| operating_status    | OFFLINE                              |
| pools               |                                      |
| project_id          | f631c12338934447bb3172f3378d2b9a     |
| provider            | amphora                              |
| provisioning_status | PENDING_CREATE                       |
| updated_at          | None                                 |
| vip_address         | 192.168.100.120                      |
| vip_network_id      | 431d7888-dcde-40dc-9727-ecfa65a25366 |
| vip_port_id         | 4dec49a6-f9fd-4ba6-a23b-f85707a70640 |
| vip_qos_policy_id   | None                                 |
| vip_subnet_id       | db0a36a6-5be6-4609-951e-27b4d3f9f5b9 |
+---------------------+--------------------------------------+

# after a few minutes, stauts turns to [ACTIVE] if instance successfully created

[root@dlp ~(keystone)]#
openstack loadbalancer list

+--------------------------------------+------+----------------------------------+-----------------+---------------------+------------------+----------+
| id                                   | name | project_id                       | vip_address     | provisioning_status | operating_status | provider |
+--------------------------------------+------+----------------------------------+-----------------+---------------------+------------------+----------+
| 9a4aeebc-68fb-4e4e-ae5f-94ad9cb1ca44 | lb01 | f631c12338934447bb3172f3378d2b9a | 192.168.100.120 | ACTIVE              | OFFLINE          | amphora  |
+--------------------------------------+------+----------------------------------+-----------------+---------------------+------------------+----------+
[2] Add a listener and pool to the instance and Configure loadbalancing to use 2 backend Web Server instances.
# create a listener that listens TCP 80

[root@dlp ~(keystone)]#
openstack loadbalancer listener create --name listener01 --protocol TCP --protocol-port 80 lb01

+-----------------------------+--------------------------------------+
| Field                       | Value                                |
+-----------------------------+--------------------------------------+
| admin_state_up              | True                                 |
| connection_limit            | -1                                   |
| created_at                  | 2020-11-26T05:54:59                  |
| default_pool_id             | None                                 |
| default_tls_container_ref   | None                                 |
| description                 |                                      |
| id                          | cb27a811-f50f-44cc-95a2-c34dee021928 |
| insert_headers              | None                                 |
| l7policies                  |                                      |
| loadbalancers               | 9a4aeebc-68fb-4e4e-ae5f-94ad9cb1ca44 |
| name                        | listener01                           |
| operating_status            | OFFLINE                              |
| project_id                  | f631c12338934447bb3172f3378d2b9a     |
| protocol                    | TCP                                  |
| protocol_port               | 80                                   |
| provisioning_status         | PENDING_CREATE                       |
| sni_container_refs          | []                                   |
| timeout_client_data         | 50000                                |
| timeout_member_connect      | 5000                                 |
| timeout_member_data         | 50000                                |
| timeout_tcp_inspect         | 0                                    |
| updated_at                  | None                                 |
| client_ca_tls_container_ref | None                                 |
| client_authentication       | NONE                                 |
| client_crl_container_ref    | None                                 |
| allowed_cidrs               | None                                 |
| tls_ciphers                 | None                                 |
| tls_versions                | None                                 |
| alpn_protocols              | None                                 |
+-----------------------------+--------------------------------------+

# add a pool to the listener

[root@dlp ~(keystone)]#
openstack loadbalancer pool create --name pool01 --lb-algorithm ROUND_ROBIN --listener listener01 --protocol TCP

+----------------------+--------------------------------------+
| Field                | Value                                |
+----------------------+--------------------------------------+
| admin_state_up       | True                                 |
| created_at           | 2020-11-26T05:55:17                  |
| description          |                                      |
| healthmonitor_id     |                                      |
| id                   | 79c101d8-5347-4737-add7-5e33ec51c056 |
| lb_algorithm         | ROUND_ROBIN                          |
| listeners            | cb27a811-f50f-44cc-95a2-c34dee021928 |
| loadbalancers        | 9a4aeebc-68fb-4e4e-ae5f-94ad9cb1ca44 |
| members              |                                      |
| name                 | pool01                               |
| operating_status     | OFFLINE                              |
| project_id           | f631c12338934447bb3172f3378d2b9a     |
| protocol             | TCP                                  |
| provisioning_status  | PENDING_CREATE                       |
| session_persistence  | None                                 |
| updated_at           | None                                 |
| tls_container_ref    | None                                 |
| ca_tls_container_ref | None                                 |
| crl_container_ref    | None                                 |
| tls_enabled          | False                                |
| tls_ciphers          | None                                 |
| tls_versions         | None                                 |
+----------------------+--------------------------------------+

# web server instances

[root@dlp ~(keystone)]#
openstack server list

+--------------------------------------+---------------+--------+-------------------------+---------+----------+
| ID                                   | Name          | Status | Networks                | Image   | Flavor   |
+--------------------------------------+---------------+--------+-------------------------+---------+----------+
| 1df58f38-bac2-46a7-ba6d-fb21fc43d120 | CentOS-8-Web2 | ACTIVE | private=192.168.100.207 | CentOS8 | m1.small |
| 65e97bf7-0561-437c-9301-f679bd81dc07 | CentOS-8-Web1 | ACTIVE | private=192.168.100.154 | CentOS8 | m1.small |
+--------------------------------------+---------------+--------+-------------------------+---------+----------+

# add web server instances to the pool member

[root@dlp ~(keystone)]#
openstack loadbalancer member create --subnet-id private-subnet --address 192.168.100.207 --protocol-port 80 pool01

+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| address             | 192.168.100.207                      |
| admin_state_up      | True                                 |
| created_at          | 2020-11-26T05:59:27                  |
| id                  | 636cd334-0a11-421a-9926-370b30116724 |
| name                |                                      |
| operating_status    | NO_MONITOR                           |
| project_id          | f631c12338934447bb3172f3378d2b9a     |
| protocol_port       | 80                                   |
| provisioning_status | PENDING_CREATE                       |
| subnet_id           | db0a36a6-5be6-4609-951e-27b4d3f9f5b9 |
| updated_at          | None                                 |
| weight              | 1                                    |
| monitor_port        | None                                 |
| monitor_address     | None                                 |
| backup              | False                                |
+---------------------+--------------------------------------+

[root@dlp ~(keystone)]#
openstack loadbalancer member create --subnet-id private-subnet --address 192.168.100.154 --protocol-port 80 pool01

+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| address             | 192.168.100.154                      |
| admin_state_up      | True                                 |
| created_at          | 2020-11-26T05:59:44                  |
| id                  | 0bf65bc4-03a3-4fe7-9991-fb7c67e3da2c |
| name                |                                      |
| operating_status    | NO_MONITOR                           |
| project_id          | f631c12338934447bb3172f3378d2b9a     |
| protocol_port       | 80                                   |
| provisioning_status | PENDING_CREATE                       |
| subnet_id           | db0a36a6-5be6-4609-951e-27b4d3f9f5b9 |
| updated_at          | None                                 |
| weight              | 1                                    |
| monitor_port        | None                                 |
| monitor_address     | None                                 |
| backup              | False                                |
+---------------------+--------------------------------------+

[root@dlp ~(keystone)]#
openstack loadbalancer member list pool01

+--------------------------------------+------+----------------------------------+---------------------+-----------------+---------------+------------------+--------+
| id                                   | name | project_id                       | provisioning_status | address         | protocol_port | operating_status | weight |
+--------------------------------------+------+----------------------------------+---------------------+-----------------+---------------+------------------+--------+
| 636cd334-0a11-421a-9926-370b30116724 |      | f631c12338934447bb3172f3378d2b9a | ACTIVE              | 192.168.100.207 |            80 | NO_MONITOR       |      1 |
| 0bf65bc4-03a3-4fe7-9991-fb7c67e3da2c |      | f631c12338934447bb3172f3378d2b9a | ACTIVE              | 192.168.100.154 |            80 | NO_MONITOR       |      1 |
+--------------------------------------+------+----------------------------------+---------------------+-----------------+---------------+------------------+--------+

# create a floating IP on public network

[root@dlp ~(keystone)]#
openstack floating ip create public

+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| created_at          | 2020-11-26T06:00:16Z                 |
| description         |                                      |
| dns_domain          |                                      |
| dns_name            |                                      |
| fixed_ip_address    | None                                 |
| floating_ip_address | 10.0.0.250                           |
| floating_network_id | dae78c9d-c885-4949-a05d-8e456f9ba1b9 |
| id                  | b107cd4e-c3a6-40ad-88b9-60e5b9af4ba7 |
| name                | 10.0.0.250                           |
| port_details        | None                                 |
| port_id             | None                                 |
| project_id          | f631c12338934447bb3172f3378d2b9a     |
| qos_policy_id       | None                                 |
| revision_number     | 0                                    |
| router_id           | None                                 |
| status              | DOWN                                 |
| subnet_id           | None                                 |
| tags                | []                                   |
| updated_at          | 2020-11-26T06:00:16Z                 |
+---------------------+--------------------------------------+

# assosiate floating IP with VIP of loadbalancer instace

[root@dlp ~(keystone)]#
VIPPORT=$(openstack loadbalancer show lb01 | grep vip_port_id | awk {'print $4'})

[root@dlp ~(keystone)]#
openstack floating ip set --port $VIPPORT 10.0.0.250
# verify settings to access to the floating IP

[root@dlp ~(keystone)]#
curl 10.0.0.250

Web Server on Instance01
[root@dlp ~(keystone)]#
curl 10.0.0.250

Web Server on Instance02
[root@dlp ~(keystone)]#
curl 10.0.0.250

Web Server on Instance01
[root@dlp ~(keystone)]#
curl 10.0.0.250

Web Server on Instance02
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