Failed to add worker to cluster: Failed to exec command: sudo env PATH=$PATH /bin/sh -c "/usr/local/bin/kubeadm join lb.kubesphere.local:6443
error execution phase preflight: [preflight] Some fatal errors occurred:
[ERROR FileExisting-conntrack]: conntrack not found in system path
[ERROR FileExisting-ip]: ip not found in system path
[ERROR FileExisting-iptables]: iptables not found in system path
但是conntrack确实安装过了
