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Autoscaling

Autoscaling is the home for any autoscaling functionality used on the RPK platform. Currently, it includes the Vertical Pod Autoscaler (VPA). In order to use, create a VerticalPodAutoscaler resource to configure vertical autoscaling behavior for your workload. An example manifest can be found here.

Default Variables

The following variables are defaulted at common/vars/main.yaml and are included via meta/main.yaml. They do not need to be explicitly specified.

Variable Name Description Default Value Variable Type Required
tanzu_autoscaling.namespace Defines the name for the autoscaling namespace "tanzu-autoscaling" string yes
tanzu_autoscaling.demo_namespace Defines the name for the autoscaling namespace used by make demo.role "tanzu-demo" string yes
tanzu_autoscaling.staging_dir Local directory to write the staging manfiests to "{{ rpk_staging_dir }}/tanzu-autoscaling" string yes
tanzu_workload_tenancy.vpa.version Version of the Vertical Pod Autoscaler to use "0.9.0" string yes

Additional Variables

The following variables are required for proper role operation and should be specified as part of the global inventory, or other mechanism.

Variable Name Description Default Value Variable Type Required
tanzu_kubectl_context Name of context to use for connection to Kubernetes - string yes

Dependencies

Also see meta/main.yaml to view role dependencies which are run when running the role independently.

  • security
  • monitoring

Deploying

NOTE: roles from meta/main.yaml are also deployed.

In order to deploy the role from a versioned image:

ROLE=autoscaling make deploy.role

If you've made changes to the role and need to verify your changes:

ROLE=autoscaling make deploy.test.role

Validating

For a module that has validation tests, run them with:

$ ROLE=autoscaling make validate.role

To view the status of the validation test:

$ make validate.status

Once status is complete, If test result is passed, clean up the sonobuoy assets as follows:

$ make validate.clean

See docs/VALIDATION.md for further info regarding validation tests.

Demonstrating

Once the role has run successfully, you should be able to demonstrate the role. This demo simply does the following:

  • Creates a TanzuNamespace resource, which in turn creates:
    • Namespace
    • LimitRange in the Namespace
    • ResourceQuota in the Namespace
  • Creates a sample nginx Deployment and Service
  • Creates a VerticalPodAutoscaler in Initial mode for the nginx sample workload
ROLE=autoscaling make demo.role

Cleaning

To remove the role, from the root of the repo:

ROLE=autoscaling make clean.role

Author(s)

Rich Lander