Configuration Openstack with Masakari#

This article describes how to configure Instance High Availability service with Openstack CLI. Before continuing please make sure that the Masakari and its components are enabled in the system as it described in the article

Group compute nodes into segments#

The segment object is a logical grouping of compute nodes into zones also known as availability zones. The segment object enables the cloud operator to list, create, show details for, update, and delete segments.

To create a segment named allcomputes with service_type = compute, and recovery_method = auto, run:

openstack segment create allcomputes auto compute

Create hosts under segments#

The host object represents compute service hypervisors. A host belongs to a segment. The host can be any kind of virtual machine that has compute service running on it. The host object enables the operator to list, create, show details for, update, and delete hosts.

To create a host under a given segment:

Obtain the hypervisor hostname:
```
openstack hypervisor list
```
Create the host under previously created segment.
```
openstack segment host create \
    <hypervisor hostname> \
    compute \
    SSH \
    <segment>
```
where:
- <hypervisor hostname> - hostname from the command's result on step 1.
- <segment> - name or UUID of existing segment, created in previous section

For example:

openstack segment host create \
    test-host-1 \
    compute \
    SSH \
    b8b0d7ca-1088-49db-a1e2-be004522f3d1

Requirements for the introspective instance monitor#

For the introspective instance monitor to work correctly, the following conditions must be met:

The images used to create the virtual machines have the hw_qemu_guest_agent=yes property set. To set it, you must run the command:
```
openstack image set --property hw_qemu_guest_agent=yes Ubuntu-18.04
```
where Ubuntu-18.04 is the name of the image for which you want to set the property.

Virtual machines must be created with the HA_Enabled=True property set

openstack server create --flavor <FLAVOR> \
                        --image <IMAGE> \
                        --network <NETWORK> \
                        --property HA_Enabled=True \
                        <SERVER_NAME>

QEMU Guest Agent must be installed in the virtual machine after it is launched.