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Chapter 2. Configuring and deploying the overcloud for autoscaling
You must configure the templates for the services on your overcloud that enable autoscaling.
Procedure
- Create environment templates and a resource registry for autoscaling services before you deploy the overcloud for autoscaling. For more information, see Section 2.1, “Configuring the overcloud for autoscaling”
- Deploy the overcloud. For more information, see Section 2.2, “Deploying the overcloud for autoscaling”
2.1. Configuring the overcloud for autoscaling
Create the environment templates and resource registry that you need to deploy the services that provide autoscaling.
Procedure
-
Log in to the undercloud host with your overcloud administrator credentials, for example
overcloudrc. Create a directory for the autoscaling configuration files:
mkdir -p $HOME/templates/autoscaling/
$ mkdir -p $HOME/templates/autoscaling/Copy to Clipboard Copied! Toggle word wrap Toggle overflow Create the resource registry file for the definitions that the services require for autoscaling:
Copy to Clipboard Copied! Toggle word wrap Toggle overflow Create an environment template to configure the services required for autoscaling:
Copy to Clipboard Copied! Toggle word wrap Toggle overflow If you use Red Hat Ceph Storage as the data storage back end for the time-series database service, add the following parameters to your
parameters-autoscaling.yamlfile:parameter_defaults: GnocchiRbdPoolName: 'metrics' GnocchiBackend: 'rbd'
parameter_defaults: GnocchiRbdPoolName: 'metrics' GnocchiBackend: 'rbd'Copy to Clipboard Copied! Toggle word wrap Toggle overflow You must create the defined archive policy
genericbefore you can store metrics. You define this archive policy after the deployment. For more information, see Section 3.1, “Creating the generic archive policy for autoscaling”.-
Set the
polling_intervalparameter, for example, 60 seconds. The value of thepolling_intervalparameter must match the gnocchi granularity value that you defined when you created the archive policy. For more information, see Section 3.1, “Creating the generic archive policy for autoscaling”. - Deploy the overcloud. For more information, see Section 2.2, “Deploying the overcloud for autoscaling”
2.2. Deploying the overcloud for autoscaling
You can deploy the overcloud for autoscaling by using director.
Prerequisites
- You have created the environment templates for deploying the services that provide autoscaling capabilities. For more information, see Section 2.1, “Configuring the overcloud for autoscaling”.
2.2.1. Deploying the overcloud for autoscaling by using director
Use director to deploy the overcloud.
Prerequisites
- A deployed undercloud. For more information, see Installing director on the undercloud.
Procedure
-
Log in to the undercloud as the
stackuser. Source the
stackrcundercloud credentials file:source ~/stackrc
[stack@director ~]$ source ~/stackrcCopy to Clipboard Copied! Toggle word wrap Toggle overflow Add the autoscaling environment files to the stack with your other environment files and deploy the overcloud:
openstack overcloud deploy --templates \ -e [your environment files] \ -e $HOME/templates/autoscaling/parameters-autoscaling.yaml \ -e $HOME/templates/autoscaling/resources-autoscaling.yaml
(undercloud)$ openstack overcloud deploy --templates \ -e [your environment files] \ -e $HOME/templates/autoscaling/parameters-autoscaling.yaml \ -e $HOME/templates/autoscaling/resources-autoscaling.yamlCopy to Clipboard Copied! Toggle word wrap Toggle overflow
2.3. Verifying the overcloud deployment for autoscaling
Verify that the autoscaling services are deployed and enabled. The verification output examples might be different from your use case.
Prerequisites
- You have deployed the autoscaling services in an existing overcloud using director. For more information, see Section 2.2, “Deploying the overcloud for autoscaling”.
Procedure
-
Log in to your environment as the
stackuser. For director environments, source the
overcloudrcovercloud credentials file:source ~/overcloudrc
$ source ~/overcloudrcCopy to Clipboard Copied! Toggle word wrap Toggle overflow
Verification
Verify that the deployment was successful and ensure that the service API endpoints for autoscaling are available:
Copy to Clipboard Copied! Toggle word wrap Toggle overflow Copy to Clipboard Copied! Toggle word wrap Toggle overflow Use the overcloud credentials to check the heat service:
Copy to Clipboard Copied! Toggle word wrap Toggle overflow Verify that the services are running on the overcloud:
Copy to Clipboard Copied! Toggle word wrap Toggle overflow Verify that the time-series database service is available:
Copy to Clipboard Copied! Toggle word wrap Toggle overflow
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