flannel multiarch (https://blog.lwolf.org/post/how-to-deploy-multi-arch-kubernetes-cluster-using-kubespray/)

flannel.yaml

apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: kube-flannel-ds-arm64
  namespace: kube-system
  ...
spec:
  template:
    spec:
      ...
      nodeSelector:
        beta.kubernetes.io/os: linux
        beta.kubernetes.io/arch: arm64
      ...
      containers:
      - name: kube-flannel
        image: {{ flannel_image_repo }}:{{ flannel_image_tag }}-arm64