#!/bin/bash

KUBE_SVC='
kubelet
kube-scheduler
kube-proxy
kube-controller-manager
kube-apiserver
'

for kube_svc in ${KUBE_SVC};
do
  # 停止服务
  if [[ `systemctl is-active ${kube_svc}` == 'active' ]]; then
    systemctl stop ${kube_svc}
  fi
  # 禁止服务开机启动
  if [[ `systemctl is-enabled ${kube_svc}` == 'enabled' ]]; then
    systemctl disable ${kube_svc}
  fi
done

# 停止所有容器
docker stop $(docker ps -aq)

# 删除所有容器
docker rm -f $(docker ps -qa)

# 删除所有容器卷
docker volume rm $(docker volume ls -q)

# 卸载 mount 目录
for mount in $(mount | grep tmpfs | grep '/var/lib/kubelet' | awk '{ print $3 }') /var/lib/kubelet /var/lib/rancher;
do
  umount $mount;
done

# 备份目录
mv /etc/kubernetes /etc/kubernetes-bak-$(date +"%Y%m%d%H%M")
mv /var/lib/etcd /var/lib/etcd-bak-$(date +"%Y%m%d%H%M")
mv /var/lib/rancher /var/lib/rancher-bak-$(date +"%Y%m%d%H%M")
mv /opt/rke /opt/rke-bak-$(date +"%Y%m%d%H%M")

# 删除残留路径
rm -rf /etc/ceph \
    /etc/cni \
    /opt/cni \
    /run/secrets/kubernetes.io \
    /run/calico \
    /run/flannel \
    /var/lib/calico \
    /var/lib/cni \
    /var/lib/kubelet \
    /var/log/containers \
    /var/log/kube-audit \
    /var/log/pods \
    /var/run/calico

# 清理网络接口
no_del_net_inter='
lo
docker0
eth
ens
bond
'

network_interface=`ls /sys/class/net`

for net_inter in ${network_interface};
do
  if ! echo "${no_del_net_inter}" | grep -qE ${net_inter:0:3}; then
    ip link delete $net_inter
  fi
done

# 清理残留进程
port_list='
80
443
6443
2376
2379
2380
8472
9099
10250
10254
'

for port in ${port_list};
do
  pid=`netstat -atlnup | grep -w ${port} | grep -v - | awk '{print $7}' | awk -F '/' '{print $1}' | sort -rnk2 | uniq`
  if [[ -n ${pid} ]]; then
    kill -15 ${pid}
  fi
done

kube_pid=`ps -ef | grep -v grep | grep kube | awk '{print $2}'`

if [[ -n ${kube_pid} ]]; then
  kill -15 ${kube_pid}
fi

# 清理 Iptables 表
## 注意：如果节点 Iptables 有特殊配置，以下命令请谨慎操作
sudo iptables --flush
sudo iptables --flush --table nat
sudo iptables --flush --table filter
sudo iptables --table nat --delete-chain
sudo iptables --table filter --delete-chain
systemctl restart docker