Configuration

The virtual environment deployed by tripleo-quickstart is largely controlled by variables that get there defaults from the common role.

You configure tripleo-quickstart by placing variable definitions in a YAML file and passing that to ansible using the -e command line option, like this:

ansible-playbook playbook.yml -e @myconfigfile.yml

Controlling resources

These variables set the resources that will be assigned to a node by default, unless overridden by a more specific variable:

  • default_disk
  • default_memory
  • default_vcpu

These variables set the resources assigned to the undercloud node:

  • undercloud_disk
  • undercloud_memory (defaults to 12288)
  • undercloud_vcpu (defaults to 4)

These variables set the resources assigned to controller nodes:

  • control_disk
  • control_memory
  • control_vcpu

These variables control the resources assigned to compute nodes:

  • compute_disk
  • compute_memory
  • compute_vcpu

These variables control the resources assigned to ceph storage nodes:

  • ceph_disk
  • ceph_memory
  • ceph_vcpu

There is another option extradevices that can be used to create three additional blockdevices vdb, vdc and vdd per node. By default it is only enabled on the objectstorage node flavor.

Setting number and type of overcloud nodes

The overcloud_nodes variable can be used to change the number and type of nodes deployed in your overcloud. The default (config/general_config/minimal.yml) looks like this:

overcloud_nodes:
  - name: control_0
    flavor: control

  - name: compute_0
    flavor: compute

You can use your own config if you want to test a different setup. For example:

overcloud_nodes:
  - name: control_0
    flavor: control
  - name: control_1
    flavor: control
  - name: control_2
    flavor: control

  - name: compute_0
    flavor: compute

  - name: ceph_0
    flavor: ceph

  - name: swift_0
    flavor: objectstorage

Specifying custom heat templates

The overcloud_templates_path variable can be used to define a different path where to get the heat templates. By default this variable will not be set.

The overcloud_templates_repo variable can be used to define the remote repository from where the templates need to be cloned. When this variable is set, along with overcloud_templates_path, the templates will be cloned from that remote repository into the target specified, and these will be used in overcloud deployment.

The overcloud_templates_branch variable can be used to specify the branch that needs to be cloned from a specific repository. When this variable is set, git will clone only the branch specified.

An example

To create a minimal environment that would be unsuitable for deploying anything real nova instances, you could place something like the following in myconfigfile.yml:

undercloud_memory: 8192
control_memory: 6000
compute_memory: 2048

overcloud_nodes:
  - name: control_0
    flavor: control

  - name: compute_0
    flavor: compute

And then pass that to the ansible-playbook command as described at the beginning of this document.

Explicit Teardown

You can select what to delete prior to the run of quickstart adding a –teardown (or -T) options with the following parameters:

  • nodes: default, remove only undercloud and overcloud nodes
  • virthost: same as nodes but network setup is deleted too
  • all: same as virthost but user setup in virthost is deleted too
  • none: will not teardown anything (useful for testing multiple actions against a deployed overcloud)

Undercloud customization

You can perform extra undercloud customization steps, using a script that will be applied with virt-customize on the final undercloud image. To allow that, you need to pass the undercloud_customize_script var, that needs to point to an script living on your filesystem. That script will be copied to working directory, and applied on the undercloud. The script can be in Jinja template format, so you can benefit from ansible var substitutions.

Overcloud customization

You can perform extra overclud customization steps, using a script that will be applied with virt-customize on the overcloud-full image. To allow that, you need to pass the overcloud_customize_script var, that needs to point to an script living on your filesystem. That script will be copied to working directory, and applied on the overcloud. The script can be in Jinja template format, so you can benefit from ansible var substitutions.

Consuming external images

In the usual workflow, tripleo-quickstart relies on the overcloud and agent images that are shipped in the undercloud. But for certain types of tests, it is useful to provide your own images. To achieve that, set the use_external_images to True. This will cause to inject all the images listed in the inject_images list into the undercloud, so the system can use it. Please note that you also need to define all the images you want to fetch, using the images setting. You will need to define the name of the image, the url where to get it, and the image type (qcow2, tar). As a reference, please look at http://git.openstack.org/cgit/openstack/tripleo-quickstart/tree/config/release/master-tripleo-ci.yml