Nodus dual stack support

Owned by Krzysztof Szajerski
Last updated: Oct 27, 2021
1 min read

How to bring up the Kubernetes dual stack support?

  • IPv6 and IPv6 forwarding must be enabled:
    sysctl -w net.ipv6.conf.all.disable_ipv6=0
    sysctl -w net.ipv6.conf.all.forwarding=1
  • All the nodes must have an IPv6 address and they should be able to reach others over an IPv6 connection:
    Edit netplan configuration file (/etc/netplan/50-vagrant.yaml). Add IPv6 address to list of addresses and set in interface section:
    accept-ra: no

    After that netplan apply needs to be called.

  • Following parameters need to be added to kubeadm init command:
    --pod-network-cidr=10.233.64.0/18,2001:db8:1234:5678:8:2::/64 \
    --service-cidr=10.96.0.0/12,2001:db8:1234:5678:8:3::/108 \
    --feature-gates=IPv6DualStack=true \
    --apiserver-advertise-address=10.10.10.13