Changing load balancer resources

By default, a load balancer instance is created with 2 vCPUs and 4 GB of memory. When a load balancer needs more resources, you can add them by applying another flavor to the load balancer. To do this, you need to perform a manual load balancer failover.

By default, a load balancer is created by using the private amphora flavor that cannot be managed via vinfra. You can, however, change it by using the OpenStack command-line tool.

Prerequisites

To authorize further OpenStack commands, the OpenStack command-line client must be configured, as outlined in Connecting to OpenStack command-line interface.

To change the default load balancer flavor

Check if the default amphora flavor exists:

# openstack --insecure flavor list --all
+---------+---------+-------+------+-----------+-------+-----------+
| ID      | Name    |   RAM | Disk | Ephemeral | VCPUs | Is Public |
+---------+---------+-------+------+-----------+-------+-----------+
| 100     | tiny    |   512 |    0 |         0 |     1 | True      |
| 101     | small   |  2048 |    0 |         0 |     1 | True      |
| 102     | medium  |  4096 |    0 |         0 |     2 | True      |
| 103     | large   |  8192 |    0 |         0 |     4 | True      |
| 104     | xlarge  | 16384 |    0 |         0 |     8 | True      |
| amphora | amphora |  4096 |   30 |         0 |     2 | False     |
+---------+---------+-------+------+-----------+-------+-----------+

Delete this flavor:

# openstack --insecure flavor delete amphora

Create a new amphora flavor with custom parameters. For example:

# openstack --insecure flavor create amphora --id amphora --ram 8192 \
--vcpus 4 --disk 60 --private
+----------------------------+---------+
| Field                      | Value   |
+----------------------------+---------+
| OS-FLV-DISABLED:disabled   | False   |
| OS-FLV-EXT-DATA:ephemeral  | 0       |
| disk                       | 60      |
| id                         | amphora |
| name                       | amphora |
| os-flavor-access:is_public | False   |
| properties                 |         |
| ram                        | 8192    |
| rxtx_factor                | 1.0     |
| swap                       |         |
| vcpus                      | 4       |
+----------------------------+---------+

Change the load balancer flavor by performing its failover. For example:
```
# openstack --insecure loadbalancer failover mylbaas
```

The load balancer mylbaas will be re-created with 4 vCPUs, 8 GB of RAM, and 60 GB of disk space.