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3.2. Topology recommendation for the Object Storage service

Define dedicated nodes for the Red Hat OpenStack Platform (RHOSP) Object Storage service. Doing this prevents any disk I/O by the RHOSP Telemetry service from impacting any other services on the Controller node.

3.2.1. Defining dedicated Object Storage nodes

Dedicating a node to the Red Hat OpenStack Platform (RHOSP) Object Storage service improves performance.

Procedure

  1. Create a custom roles_data.yaml file (based on the default /usr/share/openstack-tripleo-heat-templates/roles_data.yaml).

  2. Edit the custom roles_data.yaml file by removing the Object Storage service entry from the Controller node.

    Specifically, remove the following line from the ServicesDefault list of the Controller role: 

        - OS::TripleO::Services::SwiftStorage

  3. Use the ObjectStorageCount resource in your custom environment file to set how many dedicated nodes to allocate for the Object Storage service.

    For example, add ObjectStorageCount: 3 to the parameter_defaults in your environment file to deploy three dedicated object storage nodes: 

    parameter_defaults:
  ObjectStorageCount: 3

  4. To apply this configuration, deploy the overcloud, adding roles_data.yaml to the stack along with your other environment files: 

    (undercloud) $ openstack overcloud deploy --templates \
  -e [your environment files]
  -e /home/stack/templates/roles_data.yaml

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