Files used for crun - cri-o kubernetes install: https://dalethestirling.github.io/Lightweight-Kubernetes-Centos-8-Stream/

02-cgroup-manager.conf

[crio.runtime]
conmon_cgroup = "pod"
cgroup_manager = "cgroupfs"

03-runtime-crun.conf

[crio.runtime.runtimes.crun]
runtime_path = "/usr/bin/crun"
runtime_type = "oci"
runtime_root = "/run/crun"

11-cgroups.conf

[Service]
CPUAccounting=true
MemoryAccounting=true

99-kubernetes-cri.conf

#File defines sysctl settings required for kubernetes/cri-o
net.bridge.bridge-nf-call-iptables  = 1
net.ipv4.ip_forward                 = 1
net.bridge.bridge-nf-call-ip6tables = 1

kubeadm-config.yaml

kind: ClusterConfiguration
apiVersion: kubeadm.k8s.io/v1beta2
kubernetesVersion: v1.21.1
clusterName: outpost-1
networking:  
  podSubnet: 10.244.0.0/16
---
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
cgroupDriver: cgroupfs

kubernetes.repo

[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-$basearch
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
exclude=kubelet kubeadm kubectl