卸载k8s + containerd

清理kubeadm、containerd残留

#!/usr/bin/env bash
set -euo pipefail

echo -e "\033[42;30m===== 开始执行【全场景全覆盖】K8s 终极节点重置（适配kubeadm/sealos/kubekey/kubesray/kubeasz/二进制/deb混合残留）=====\033[0m"

# ======================
# 1. 通用集群重置（kubeadm体系）
# ======================
if command -v kubeadm >/dev/null; then
    kubeadm reset -f || true
fi

# ======================
# 2. 停止所有可能存在的服务（全覆盖）
# ======================
systemctl stop \
containerd kubelet \
kube-apiserver kube-controller-manager kube-scheduler kube-lb \
sealos kube-proxy etcd \
2>/dev/null || true

systemctl disable \
containerd kubelet \
kube-apiserver kube-controller-manager kube-scheduler kube-lb \
sealos kube-proxy etcd \
2>/dev/null || true

# ======================
# 3. 清理【二进制部署残留】控制面服务（你之前无限复活的元凶）
# ======================
rm -f /etc/systemd/system/kube-apiserver.service
rm -f /etc/systemd/system/kube-controller-manager.service
rm -f /etc/systemd/system/kube-scheduler.service
rm -f /etc/systemd/system/kube-lb.service
rm -f /etc/systemd/system/etcd.service
rm -f /etc/systemd/system/kube-proxy.service

# ======================
# 4. 清理 Sealos / Kubekey / KubeSray / Kubeasz 专属服务 & 目录
# ======================
# sealos 残留
rm -rf /var/lib/sealos /etc/sealos /root/.sealos
rm -f /etc/systemd/system/sealos.service

# kubekey/kubesray 残留
rm -rf /var/lib/kubekey /etc/kubekey /opt/kubekey
rm -rf /var/lib/kubesphere /etc/kubesphere

# kubeasz 残留
rm -rf /etc/kubeasz /var/lib/kubeasz

# ======================
# 5. 标准卸载：先卸载包再删文件（修复顺序错误）
# ======================
apt remove -y --allow-change-held-packages containerd.io containerd kubeadm kubectl kubelet 2>/dev/null || true
apt autoremove -y || true
apt autoclean

# 解除版本锁定，保证下次重装无冲突
apt-mark unhold kubeadm kubelet kubectl containerd.io 2>/dev/null || true

# ======================
# 6. 彻底清理所有路径 systemd 单元（解决二进制+deb双路径冲突）
# ======================
rm -f /lib/systemd/system/kubelet.service
rm -f /etc/systemd/system/kubelet.service
rm -rf /etc/systemd/system/kubelet.service.d

rm -f /lib/systemd/system/containerd.service
rm -f /etc/systemd/system/containerd.service
rm -rf /etc/systemd/system/containerd.service.d
rm -f /usr/local/lib/systemd/system/containerd.service

# ======================
# 7. 彻底清理所有路径 k8s/容器二进制
# 覆盖：apt/deb / 二进制解压 / kubekey / sealos
# ======================
rm -f /usr/bin/containerd /usr/bin/ctr /usr/bin/kube*
rm -f /usr/local/bin/containerd /usr/local/bin/ctr /usr/local/bin/kube*
rm -f /opt/kube/bin/* 2>/dev/null || true

# ======================
# 8. 重载 systemd、清除失效状态
# ======================
systemctl daemon-reload
systemctl reset-failed

# ======================
# 9. 绝杀所有残留进程（杜绝复活、端口占用）
# ======================
pkill -9 -f "kube-apiserver|kube-scheduler|kube-controller-manager|kube-lb|kubelet|containerd|sealos|etcd" 2>/dev/null || true

# ======================
# 10. 清空所有体系数据目录
# ======================

# 先卸载 Calico cgroup 挂载点（否则 rm 报 Operation not permitted）
umount -R /var/run/calico/cgroup 2>/dev/null || true
umount -R /run/calico/cgroup 2>/dev/null || true

# /var/run 和 /run 是 tmpfs，重启自动清空，无需 rm
rm -rf \
/var/lib/containerd \
/var/lib/cri \
/etc/cni \
/opt/cni \
/root/.kube \
/etc/containerd \
/etc/kubernetes \
/var/lib/kubelet \
/var/lib/etcd \
/var/lib/calico \
/var/lib/sealos \
/var/lib/nerdctl \
/var/lib/kubekey \
/var/lib/kubesphere \
/etc/kubeasz \
/etc/cni/net.d/*

# ======================
# 11. 重置网络栈（解决多工具残留网卡、iptables错乱）
# ======================
iptables -F && iptables -t nat -F && iptables -X && ipvsadm -C
ip link del tunl0 2>/dev/null || true
ip link del cni0 2>/dev/null || true
ip link del flannel.1 2>/dev/null || true
ip link del vxlan.calico 2>/dev/null || true

echo -e "\033[42;30m✅ 【k8s残留】清理完成！"

 

清理 containerd 软件源

# 删除docker源文件
rm -f /etc/apt/sources.list.d/docker.list
# 删除源密钥
rm -f /etc/apt/trusted.gpg.d/docker.gpg
# 更新源缓存
apt update

 

清理k8s软件源

rm -f /etc/apt/sources.list.d/kubernetes.list
rm -f /etc/apt/trusted.gpg.d/kubernetes-*.gpg
apt update