# 警告：此脚本将清理整个K8S集群，包括所有POD、ETCD数据等
# 请三思后运行此脚本 ansible-playbook 99.clean.yml

# 清理 kube-node 相关服务
- hosts:
  - kube-master
  - new-master
  - kube-node
  - new-node
  tasks:
  - name: stop kube-node service
    shell: "systemctl stop kubelet kube-proxy"
    ignore_errors: true

  - name: umount kubelet 挂载的目录
    shell: "mount | grep '/var/lib/kubelet'| awk '{print $3}'|xargs umount"
    ignore_errors: true

  - name: 清理目录和文件
    file: name={{ item }} state=absent
    with_items:
    - "/var/lib/kubelet/"
    - "/var/lib/kube-proxy/"
    - "/etc/systemd/system/kubelet.service"
    - "/etc/systemd/system/kube-proxy.service"
    - "/opt/kube/kube-system/"

# 清理 kube-master 相关
- hosts:
  - kube-master
  - new-master
  tasks:
  - name: stop kube-master service
    shell: "systemctl stop kube-apiserver kube-controller-manager kube-scheduler"
    ignore_errors: true

  - name: 清理目录和文件
    file: name={{ item }} state=absent
    with_items:
    - "/var/run/kubernetes"
    - "/etc/systemd/system/kube-apiserver.service"
    - "/etc/systemd/system/kube-controller-manager.service"
    - "/etc/systemd/system/kube-scheduler.service"

# 清理集群docker服务、网络相关
- hosts:
  - kube-master
  - new-master
  - kube-node
  - new-node
  tasks:
  - name: stop docker service
    shell: "systemctl stop docker"
    ignore_errors: true

  # 因为calico-kube-controller使用了host网络，相当于使用了docker -net=host，需要
  # 卸载 /var/run/docker/netns/default
  - name: 卸载docker 相关fs1
    mount: path=/var/run/docker/netns/default state=unmounted

  - name: 卸载docker 相关fs2
    mount: path=/var/lib/docker/overlay state=unmounted

  - name: 清理目录和文件
    file: name={{ item }} state=absent
    with_items:
    - "/etc/cni/"
    - "/root/.kube/"
    - "/run/flannel/"
    - "/etc/calico/"
    - "/var/run/calico/"
    - "/var/log/calico/"
    - "/var/lib/docker/"
    - "/var/lib/kube-router/"
    - "/var/run/docker/"
    - "/etc/systemd/system/calico-node.service"
    - "/etc/systemd/system/docker.service"
    - "/etc/systemd/system/docker.service.requires/"
    - "/opt/kube/kube-system/"

  - name: 清理 iptables
    shell: "iptables -F && iptables -X \
	&& iptables -F -t nat && iptables -X -t nat \
	&& iptables -F -t raw && iptables -X -t raw \
	&& iptables -F -t mangle && iptables -X -t mangle"

  - name: 清理网络
    shell: "ip link del docker0; \
	ip link del tunl0; \
	ip link del flannel.1; \
	ip link del cni0; \
        ip link del mynet0; \
	systemctl restart networking; \
	systemctl restart network"
    ignore_errors: true

  - name: 清理calico残留路由
    shell: "for rt in `ip route|grep bird|sed 's/blackhole//'|awk '{print $1}'`;do ip route del $rt;done;"
    when: "CLUSTER_NETWORK == 'calico'"
    ignore_errors: true

# 清理etcd 集群相关
- hosts: etcd
  tasks:
  - name: stop etcd service
    shell: systemctl stop etcd
    ignore_errors: true

  - name: 清理目录和文件
    file: name={{ item }} state=absent
    with_items:
    - "/var/lib/etcd"
    - "/etc/etcd/"
    - "/etc/systemd/system/etcd.service"

# 清理负载均衡相关
- hosts: lb
  tasks:
  - name: stop keepalived service
    shell: systemctl disable keepalived && systemctl stop keepalived
    ignore_errors: true

  - name: stop haproxy service
    shell: systemctl disable haproxy && systemctl stop haproxy
    ignore_errors: true

  - name: 清理LB 配置文件目录
    file: name={{ item }} state=absent
    with_items:
    - "/etc/haproxy"
    - "/etc/keepalived"

- hosts: all
  tasks:
  - name: 清理证书目录和文件
    file: name={{ item }} state=absent
    with_items:
    - "/etc/kubernetes/"
    - "{{ ca_dir }}" 
    - "/root/.kube/"
    - "/etc/docker/"

  - name: 清理自动生成的PATH
    lineinfile:
      dest: ~/.bashrc
      state: absent
      regexp: 'kubeasz'

  - name: 清理 kubectl 命令自动补全 
    lineinfile:
      dest: ~/.bashrc
      state: absent
      regexp: 'kubectl completion'