# kubectl apply -f https://github.com/weaveworks/weave/releases/download/v2.8.1/weave-daemonset-k8s.yaml 

This worked for me. Cheers!

[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get "http://localhost:10248/healthz": dial tcp [::1]:10248: connect: connection refused.
[kubelet-check] It seems like the kubelet isn't running or healthy.
[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get "http://localhost:10248/healthz": dial tcp [::1]:10248: connect: connection refused.
[kubelet-check] It seems like the kubelet isn't running or healthy.
[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get "http://localhost:10248/healthz": dial tcp [::1]:10248: connect: connection refused.
[kubelet-check] It seems like the kubelet isn't running or healthy.
[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get "http://localhost:10248/healthz": dial tcp [::1]:10248: connect: connection refused.

I had the same issue. I found the fix here https://upcloud.com/community/tutorials/install-kubernetes-cluster-centos-8/

It seems docker is now using cgroupfs driver by default while Kubernetes is expecting systemd. You can change docker to use systemd as well by adding the following to a file /etc/docker/daemon.json.

{
  "exec-opts": ["native.cgroupdriver=systemd"]
}

Next, restart docker

$ sudo systemctl restart docker

Then reset Kubernetes to clear the failed install

$ kubeadm reset

You should then be able to initialize the master as normal.

$ kubeadm init --pod-network-cidr 192.168.0.0/16

firewall only has been opened for high ports on the worker nodes:

# firewall-cmd --permanent --add-port=30000-32767/tcp