Kubernetes failed to setup network for pod after executed kubeadm reset

Question

I initialized Kubernetes with kubeadm init, and after I used kubeadm reset to reset it I found --pod-network-cidr was wrong. After correct

Answer 1

I figured it out, if you change --pod-network-cidr when you reinitialize kubernetes via kubeadm init, you should delete some auto-created things, just follow the steps below before you execute kubeadm init again:

1. execute kubeadm reset on master and nodes.

2. execute etcdctl rm --recursive registry reset data in etcd.

3. rm -rf /var/lib/cni on master and nodes

4. rm -rf /run/flannel on master and nodes

5. rm -rf /etc/cni on master and nodes

6. ifconfig cni0 down on master and nodes

7. brctl delbr cni0 on master and nodes

Now, my Kubernetes works fine :)