Chapter 10. Using feature gates to develop solutions for your applications

Procedure

1. Apply features gates in one of the two following ways:

   1. Update the MicroShift config.yaml configuration file by making a copy of the provided config.yaml.default file in the /etc/microshift/ directory. Name it config.yaml and keep it in the source directory.
   2. Use a configuration snippet to apply the ingress control settings you want. To do this, create a configuration snippet YAML file and put it in the /etc/microshift/config.d/ configuration directory. For example, /etc/microshift/config.d/10-feature-gate.yaml.

2. Replace the default values in the xyz section of the MicroShift YAML with your valid values, or create a configuration snippet file with the sections you need.

   Feature gates configuration with example values

   # ...
   apiServer:
     featureGates:
       featureSet: TechPreviewNoUpgrade
   # ...
   apiServer:
     featureGates:
       featureSet: CustomNoUpgrade
       customNoUpgrade:
         enabled:
         - "CPUManagerPolicyAlphaOptions"
         - "MemoryQoS"
         disabled:
         - "SomeDefaultEnabledFeature"
   # ...

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3. Use the following configuration rules:

   1. You must set the featureSet field when configuring feature gates.
   2. When you use customNoUpgrade feature, you must set the featureSet to CustomNoUpgrade. The customNoUpgrade field is only valid when featureSet: CustomNoUpgrade.
4. Configure any settings required for the feature set you want to work with.

5. Restart MicroShift to apply the configuration changes by running the following command:

   $ sudo systemctl restart microshift

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