kubernetes 1.23 to 1.24 ,1.25, 1.26, 27, 28, 29 upgrade

  • install containerd and remove docker
systemctl stop docker
dnf remove docker-ce -y

dnf install containerd -y

sudo mkdir -p /etc/containerd
containerd config default | sudo tee /etc/containerd/config.toml
systemctl start containerd
systemctl enable containerd
  • edit /var/lib/kubelet/kubeadm-flags.env add below
KUBELET_KUBEADM_ARGS="--pod-infra-container-image=k8s.gcr.io/pause:3.5 --container-runtime=remote --container-runtime-endpoint=unix:///run/containerd/containerd.sock"

OR
KUBELET_KUBEADM_ARGS="--container-runtime=remote --container-runtime-endpoint=unix:///run/containerd/containerd.sock"
  • edit /etc/crictl.yaml to remove crictl warning message
echo 'runtime-endpoint: unix:///run/containerd/containerd.sock' > /etc/crictl.yaml
systemctl start containerd


#[ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist
#[ERROR FileContent--proc-sys-net-ipv4-ip_forward]: /proc/sys/net/ipv4/ip_forward contents are not set to 1

lsmod | grep -i netfilter
modprobe br_netfilter

echo 1 > /proc/sys/net/ipv4/ip_forward

echo 'net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1' > /etc/sysctl.d/k8s.conf

Remove CNI binary form /opt/cni/bin/*

rm -rf /opt/cni/bin/*

For Ubuntu 22.04 need to install containernetworking-plugins:

failed to load CNI config list file /etc/cni/net.d/10-calico.conflist: error parsing configuration list: unexpected end of JSON input: invalid cni config: failed to load

apt install containernetworking-plugins

#crontab entry for ubuntu 

@reboot modprobe br_netfilter
@reboot echo 1 > /proc/sys/net/ipv4/ip_forward

Note : weaves CNI had issue with containerd , k8 1.24 I uninstalled it.

It’s working with calico CNI

Published by

Alok

DevSecOps

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