kubeasz/roles/clean/tasks/clean_node.yml

# to clean 'kube_node' nodes
- block:
  - name: stop and disable kube_node service
    service: name={{ item }} state=stopped enabled=no
    with_items:
    - kube-lb
    - kubelet
    - kube-proxy
    ignore_errors: true

  - name: umount kubelet filesystems
    shell: "mount | grep '/var/lib/kubelet'| awk '{print $3}'|xargs umount || exit 0"
    args:
      warn: false
    ignore_errors: true

  - name: remove files and dirs of 'kube_node' nodes
    file: name={{ item }} state=absent
    with_items:
    - "/var/lib/kubelet/"
    - "/var/lib/kube-proxy/"
    - "/etc/systemd/system/kube-lb.service"
    - "/etc/systemd/system/kubelet.service"
    - "/etc/systemd/system/kube-proxy.service"
    - "/etc/kube-lb/"
    - "/etc/kubernetes/"
    - "/root/.kube/config"
    ignore_errors: true

# to clean container runtime and networking
  - block:
      - name: to check if container 'kubeasz' is running
        shell: 'docker ps|grep kubeasz || echo "NOT FOUND"'
        register: install_info

      - block:
        - name: stop and disable docker service
          service:
            name: docker
            state: stopped
            enabled: no
          ignore_errors: true
  
        # as k8s-network-plugins use host-network, '/var/run/docker/netns/default' must be umounted
        - name: umount docker filesystem-1
          mount: path=/var/run/docker/netns/default state=unmounted
  
        - name: umount docker filesystem-2
          mount: path=/var/lib/docker/overlay state=unmounted
  
        - name: umount docker filesystem-3
          shell: "echo /var/lib/docker/overlay2/*/merged|xargs umount || exit 0"
          args:
            warn: false
          ignore_errors: true

        - name: umount docker filesystem-4
          shell: "echo /var/lib/docker/containers/*/mounts/shm|xargs umount || exit 0"
          args:
            warn: false
          ignore_errors: true

        - name: umount docker filesystem-5
          shell: "echo /var/run/docker/netns/*|xargs umount || exit 0"
          args:
            warn: false
          ignore_errors: true

        - name: remove files and dirs
          file: name={{ item }} state=absent
          with_items:
          - "/var/lib/docker/"
          - "/var/lib/dockershim/"
          - "/var/run/docker/"
          - "/etc/docker/"
          - "/etc/systemd/system/docker.service"
          - "/etc/systemd/system/docker.service.requires/"
          - "/etc/systemd/system/docker.service.d/"
          - "/etc/bash_completion.d/docker"
          - "/usr/bin/docker"
        when: "'kubeasz' not in install_info.stdout"
    ignore_errors: true
    when: CONTAINER_RUNTIME == 'docker'

  - block:
      - name: stop and disable containerd service
        service:
          name: containerd
          state: stopped
          enabled: no
        ignore_errors: true

      - name: umount containerd filesystems
        shell: "mount | grep 'containerd/io.containerd'| awk '{print $3}'|xargs umount || exit 0"
        args:
          warn: false
        ignore_errors: true

      - name: remove files and dirs
        file: name={{ item }} state=absent
        with_items:
        - "/etc/containerd/"
        - "/etc/crictl.yaml"
        - "/etc/systemd/system/containerd.service"
        - "/opt/containerd/"
        - "/var/lib/containerd/"
        - "/var/run/containerd/"
    ignore_errors: true
    when: CONTAINER_RUNTIME == 'containerd'

  - name: remove files and dirs2
    file: name={{ item }} state=absent
    with_items:
    - "/etc/cni/"
    - "/run/flannel/"
    - "/etc/calico/"
    - "/var/run/calico/"
    - "/var/lib/calico/"
    - "/var/log/calico/"
    - "/etc/cilium/"
    - "/sys/fs/bpf/tc/"
    - "/var/lib/cni/"
    - "/var/lib/kube-router/"
    - "/opt/kube/kube-ovn/"
    - "/var/run/openvswitch/"
    - "/etc/origin/openvswitch/"
    - "/etc/openvswitch/"
    - "/var/log/openvswitch/"
    - "/var/run/ovn/"
    - "/etc/origin/ovn/"
    - "/etc/ovn/"
    - "/var/log/ovn/"
    ignore_errors: true

  when: "inventory_hostname in groups['kube_master'] or inventory_hostname in groups['kube_node']"