docker + cri-docker

docker

cri-docker

install cri-docker

docker proxy

kubeadm

install kubeadm

flannal

$ sudo modprobe br_netfilter
$ sudo apt update
$ sudo apt install -y tcpdump net-tools iptables wget nmap telnet man lsof ipvsadm ipset

flannel deployment

Failed to check br_netfilter: stat /proc/sys/net/bridge/bridge-nf-call-iptables: no such file or directory

pod cidr not assgned