[vagrant@k8s-master ~]$ which kubeadm
/usr/bin/kubeadm
[vagrant@k8s-master ~]$ which kubelet
/usr/bin/kubelet
[vagrant@k8s-master ~]$ which kubectl
/usr/bin/kubectl
[vagrant@k8s-master ~]$ sudo kubeadm init --pod-network-cidr 172.100.0.0/16 --apiserver-advertise-address 192.168.205.120
W0403 09:50:42.929446 8893 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
[init] Using Kubernetes version: v1.18.0
[preflight] Running pre-flight checks
[WARNING IsDockerSystemdCheck]: detected “cgroupfs” as the Docker cgroup driver. The recommended driver is “systemd”. Please follow the guide at https://kubernetes.io/docs/setup/cri/
error execution phase preflight: [preflight] Some fatal errors occurred:
[ERROR Swap]: running with swap on is not supported. Please disable swap
[preflight] If you know what you are doing, you can make a check non-fatal with --ignore-preflight-errors=...
To see the stack trace of this error execute with --v=5 or higher
[vagrant@k8s-master ~]$

这个要怎么解决呢