第3章 Deploying Ceph services on dedicated nodes

By default, the director deploys the Ceph MON and Ceph MDS services on the Controller nodes. This is suitable for small deployments. However, with larger deployments Red Hat recommends that you deploy the Ceph MON and Ceph MDS services on dedicated nodes to improve the performance of your Ceph cluster. Create a custom role for services that you want to isolate on dedicated nodes.

注記

For more information about custom roles, see Creating a New Role in the Advanced Overcloud Customization guide.

The director uses the following file as a default reference for all overcloud roles:

  • /usr/share/openstack-tripleo-heat-templates/roles_data.yaml

3.1. Creating a custom roles file

To create a custom role file, complete the following steps:

Procedure

  1. Make a copy of the roles_data.yaml file in /home/stack/templates/ so that you can add custom roles: 

    $ cp /usr/share/openstack-tripleo-heat-templates/roles_data.yaml /home/stack/templates/roles_data_custom.yaml
  2. Include the new custom role file in the openstack overcloud deploy command.