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Chapter 13. Creating availability zones for load balancing network traffic at the edge

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You can create load balancers in availability zones to increase traffic throughput and reduce latency by using the Red Hat OpenStack Platform (RHOSP) Load-balancing service (octavia).

The topics included in this section are:

13.1. Creating availability zones for the Load-balancing service

With the Red Hat OpenStack Platform (RHOSP) Load-balancing service (octavia), RHOSP administrators can create availability zones (AZs) that enable project users to create load balancers in a distributed compute node (DCN) environment to increase traffic throughput and reduce latency.

There are two steps required to create a Load-balancing service AZ: RHOSP administrators must first create an AZ profile, and then use the profile to create a Load-balancing service AZ that is visible to users.

An AZ profile must have the following:

  • The name of the Compute service (nova) AZ.
  • The management network to use.

    There are multiple management networks, one unique network for each AZ. The central AZ uses the existing load-balancing management network, lb-mgmt-net, and the additional AZs use their respective network, lb-mgmt-<AZ_name>-net, for example, lb-mgmt-az-dcn1-net, lb-mgmt-az-dcn2-net, and so on.

Prerequisites

  • You must have a DCN environment in which the required networking resources have been created by running the octavia-dcn-deployment.yaml Ansible playbook.

    For more information, see Creating network resources for Load-balancing service availability zones in the Deploying a Distributed Compute Node (DCN) architecture guide.

  • Your Load-balancing service provider driver must be amphora. The OVN provider driver does not support AZs.
  • You must be a RHOSP user with the admin role.

Procedure

  1. Source your credentials file.

    Example

    $ source ~/centralrc

  2. Gather the names of the Compute service AZs that you will use to name your Load-balancing service AZs.

    Important

    The names of the Load-balancing service AZ that you create must match the names of your Compute service AZs.

    $ openstack availability zone list --compute

    Sample output

    +------------+-------------+
    | Zone Name  | Zone Status |
    +------------+-------------+
    | az-central | available   |
    | az-dcn1    | available   |
    | az-dcn2    | available   |
    | internal   | available   |
    +------------+-------------+

  3. Gather the IDs for the management networks that you will use to create your Load-balancing service AZs:

    $ openstack network list -c Name -c ID

    Sample output

    +--------------------------------------+--------------------------+
    | ID                                   | Name                     |
    +--------------------------------------+--------------------------+
    | 10458d6b-e7c9-436f-92d9-711677c9d9fd | lb-mgmt-az-dcn2-net      |
    | 662a94f5-51eb-4a4c-86c4-52dcbf471ef9 | lb-mgmt-net              |
    | 6b97ef58-2a25-4ea5-931f-b7c07cd09474 | lb-mgmt-backbone-net     |
    | 99f4215b-fad8-432d-8444-1f894154dc30 | heat_tempestconf_network |
    | a2884aaf-846c-4936-9982-3083f6a71d9b | lb-mgmt-az-dcn1-net      |
    | d7f7de6c-0e84-49e2-9042-697fa85d2532 | public                   |
    | e887a9f9-15f7-4854-a797-033cedbfe5f3 | public2                  |
    +--------------------------------------+--------------------------+

  4. Create an AZ profile. Repeat this step to create an AZ profile for each Load-balancing service AZ that you want to create:

    $ openstack loadbalancer availabilityzoneprofile create \
    --name <AZ_profile_name> --provider amphora --availability-zone-data '{"compute_zone": "<compute_AZ_name>","management_network": "<lb_mgmt_AZ_net_UUID>"}'

    Example - create profile for az-central

    In this example, an AZ profile (az_profile_central) is created that uses the management network (lb-mgmt-net) on a Compute node that runs in the Compute AZ (az-central):

    $ openstack loadbalancer availabilityzoneprofile create \
    --name az_profile_central --provider amphora --availability-zone-data \
    '{"compute_zone": "az-central","management_network": \
    "662a94f5-51eb-4a4c-86c4-52dcbf471ef9"}'
  5. Repeat step 4 to create an AZ profile for each Load-balancing service AZ that you want to create.

    Example - create profile for az-dcn1

    In this example, an AZ profile (az-profile-dcn1) is created that uses the management network (lb-mgmt-az-dcn1-net) on a Compute node that runs in the Compute AZ (az-dcn1):

    $ openstack loadbalancer availabilityzoneprofile create \
    --name az-profile-dcn1 --provider amphora --availability-zone-data \
    '{"compute-zone": "az-dcn1","management-network": \
    "a2884aaf-846c-4936-9982-3083f6a71d9b"}'

    Example - create profile for az-dcn2

    In this example, an AZ profile (az-profile-dcn2) is created that uses the management network (lb-mgmt-az-dcn2-net) on a Compute node that runs in the Compute AZ (az-dcn2):

    $ openstack loadbalancer availabilityzoneprofile create \
    --name az-profile-dcn2 --provider amphora --availability-zone-data \
    '{"compute-zone": "az-dcn2","management-network": \
    "10458d6b-e7c9-436f-92d9-711677c9d9fd"}'
  6. Using the AZ profile, create a Load-balancing service AZ. Repeat this step for any additional AZs, using the appropriate profile for each AZ.

    Example - create AZ: az-central

    In this example, a Load-balancing service AZ (az-central) is created by using the AZ profile (az-profile-central):

    $ openstack loadbalancer availabilityzone create --name az-central \
    --availabilityzoneprofile az-profile-central \
    --description "AZ for Headquarters" --enable

    Example - create AZ: az-dcn1

    In this example, a Load-balancing service AZ (az-dcn1) is created by using the AZ profile (az-profile-az-dcn1):

    $ openstack loadbalancer availabilityzone create --name az-dcn1 \
    --availabilityzoneprofile az-profile-az-dcn1 \
    --description "AZ for South Region" --enable

    Example - create AZ: az-dcn2

    In this example, a Load-balancing service AZ (az-dcn2) is created by using the AZ profile (az-profile-az-dcn2):

    $ openstack loadbalancer availabilityzone create --name az-dcn2 \
    --availabilityzoneprofile az-profile-az-dcn2 \
    --description "AZ for North Region" --enable

Verification

  • Confirm that the AZ (az-central) was created. Repeat this step for any additional AZs, using the appropriate name for each AZ.

    Example - verify az-central

    $ openstack loadbalancer availabilityzone show az-central

    Sample output

    +------------------------------+--------------------------------------+
    | Field                        | Value                                |
    +------------------------------+--------------------------------------+
    | name                         | az-central                           |
    | availability_zone_profile_id | 5ed25d22-52a5-48ad-85ec-255910791623 |
    | enabled                      | True                                 |
    | description                  | AZ for Headquarters                  |
    +------------------------------+--------------------------------------+

    Example - verify az-dcn1

    $ openstack loadbalancer availabilityzone show az-dcn1

    Sample output

    +------------------------------+--------------------------------------+
    | Field                        | Value                                |
    +------------------------------+--------------------------------------+
    | name                         | az-dcn1                              |
    | availability_zone_profile_id | e0995a82-8e67-4cea-b32c-256cd61f9cf3 |
    | enabled                      | True                                 |
    | description                  | AZ for South Region                  |
    +------------------------------+--------------------------------------+

    Example - verify az-dcn2

    $ openstack loadbalancer availabilityzone show az-dcn2

    Sample output

    +------------------------------+--------------------------------------+
    | Field                        | Value                                |
    +------------------------------+--------------------------------------+
    | name                         | az-dcn2                              |
    | availability_zone_profile_id | 306a4725-7dac-4046-8f16-f2e668ee5a8d |
    | enabled                      | True                                 |
    | description                  | AZ for North Region                  |
    +------------------------------+--------------------------------------+

Additional resources

13.2. Creating load balancers in availability zones

With the Red Hat OpenStack Platform (RHOSP) Load-balancing service (octavia), you can create load balancers in availability zones (AZs) in a distributed compute node (DCN) environment to increase traffic throughput and reduce latency.

Prerequisites

  • You must have a Load-balancing service AZ provided by your RHOSP administrator.
  • The virtual IP (VIP) network associated with the load balancer must be available in the AZ in which your load balancer is a member.

Procedure

  1. Source your credentials file.

    Example

    $ source ~/centralrc

  2. To create a load balancer for a DCN environment, use the loadbalancer create command with the --availability-zone option and specify the appropriate AZ.

    Example

    For example, to create a non-terminated HTTPS load balancer (lb1) on a public subnet (public_subnet) on availability zone (az-central), you would enter the following command:

    $ openstack loadbalancer create --name lb1 --vip-subnet-id \
    public_subnet --availability-zone az-central
  3. Continue to create your load balancer by adding a listener, pool, health monitor, and load balancer members.

Verification

  • Confirm that the load balancer (lb1) is a member of the availability zone (az-central).

    Example

    $ openstack loadbalancer show lb1

    Sample output

    +---------------------+--------------------------------------+
    | Field               | Value                                |
    +---------------------+--------------------------------------+
    | admin_state_up      | True                                 |
    | availability_zone   | az-central                           |
    | created_at          | 2023-07-12T16:35:05                  |
    | description         |                                      |
    | flavor_id           | None                                 |
    | id                  | 85c7e567-a0a7-4fcb-af89-a0bbc9abe3aa |
    | listeners           |                                      |
    | name                | lb1                                  |
    | operating_status    | ONLINE                               |
    | pools               |                                      |
    | project_id          | d303d3bda9b34d73926dc46f4d0cb4bc     |
    | provider            | amphora                              |
    | provisioning_status | ACTIVE                               |
    | updated_at          | 2023-07-12T16:36:45                  |
    | vip_address         | 10.101.10.229                        |
    | vip_network_id      | d7f7de6c-0e84-49e2-9042-697fa85d2532 |
    | vip_port_id         | 7f916764-d171-4317-9c86-a1750a54b16e |
    | vip_qos_policy_id   | None                                 |
    | vip_subnet_id       | a421cbcf-c5db-4323-b7ab-1df20ee6acab |
    | tags                |                                      |
    +---------------------+--------------------------------------+

Additional resources

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