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3.2. Examples of configuration snippet lists or arrays

Lists, or arrays, are not merged, they are overwritten. For example, you can replace a SAN or list of SANs by creating an additional snippet for the same field that is read after the first:

MicroShift configuration directory contents

  • /etc/microshift/config.yaml.default or /etc/microshift/config.yaml

Example MicroShift configuration snippet directory contents

  • /etc/microshift/config.d/10-san.yaml

  • /etc/microshift/config.d/20-san.yaml

    Example 10-san.yaml snippet

    apiServer:
  subjectAltNames:
    - host1
    - host2

    Example 20-san.yaml snippet

    apiServer:
  subjectAltNames:
    - hostZ

    Example configuration result

    apiServer:
  subjectAltNames:
    - hostZ

If you want to add a value to an existing list, you can add it to an existing snippet. For example, to add hostZ to an existing list of SANs, edit the snippet you have instead of creating a new one:

Example 10-san.yaml snippet

apiServer:
  subjectAltNames:
    - host1
    - host2
    - hostZ

Example configuration result

apiServer:
  subjectAltNames:
    - host1
    - host2
    - hostZ

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