Red Hat build of MicroShift

Resetting the IP family policy for application pods and services

The default PreferSingleStack value does not change when you migrate the MicroShift node to dual-stack. To enable dual-stack networking in application pods and services on a node that uses dual-stack, set the ipFamilyPolicy field to PreferDualStack or RequireDualStack and restart the pods.

Prerequisites

You used the MicroShift config.yaml to define a dual-stack network with an IPv6 address family.

Procedure

Set the spec.ipFamilyPolicy field to a valid value for dual-stack networking in your service or pod by using the following example:
Example dual-stack network configuration for a service
```
kind: Service
apiVersion: v1
metadata:
  name: microshift-new-service
  labels: app: microshift-application
spec:
  type: NodePort
  ipFamilyPolicy: PreferDualStack
# ...
```
where:

spec.ipFamilyPolicy

Required. Specifies the IP family policy for the service. Valid values are PreferDualStack and RequireDualStack. The value you set depends on the requirements of your application. PreferSingleStack is the default value for the ipFamilyPolicy field.
Restart any application pods that do not have a hostNetwork defined. Pods that do have a hostNetwork defined do not need to be restarted to update the ipFamilyPolicy value.

MicroShift system services and pods are automatically updated when the ipFamilyPolicy value is updated.