kubespray/roles/reset/tasks/main.yml

---
- name: reset | stop services
  service:
    name: "{{ item }}"
    state: stopped
  with_items:
    - kubelet
    - vault
  failed_when: false
  tags:
    - services

- name: reset | remove services
  file:
    path: "/etc/systemd/system/{{ item }}.service"
    state: absent
  with_items:
    - kubelet
    - vault
    - calico-node
  register: services_removed
  tags:
    - services

- name: reset | remove docker dropins
  file:
    path: "/etc/systemd/system/docker.service.d/{{ item }}"
    state: absent
  with_items:
    - docker-dns.conf
    - docker-options.conf
    - http-proxy.conf
  register: docker_dropins_removed
  tags:
    - docker

- name: reset | systemctl daemon-reload  # noqa 503
  systemd:
    daemon_reload: true
  when: services_removed.changed or docker_dropins_removed.changed

- name: reset | remove all containers
  shell: "set -o pipefail && {{ docker_bin_dir }}/docker ps -aq | xargs -r docker rm -fv"
  args:
    executable: /bin/bash
  register: remove_all_containers
  retries: 4
  until: remove_all_containers.rc == 0
  delay: 5
  when: container_manager == "docker"
  tags:
    - docker

- name: reset | restart docker if needed  # noqa 503
  service:
    name: docker
    state: restarted
  when: docker_dropins_removed.changed and container_manager == "docker"
  tags:
    - docker

- name: reset | stop all cri containers
  shell: "set -o pipefail && {{ bin_dir }}/crictl ps -aq | xargs -r {{ bin_dir }}/crictl -t 60s stop"
  args:
    executable: /bin/bash
  register: remove_all_cri_containers
  retries: 5
  until: remove_all_cri_containers.rc == 0
  delay: 5
  tags:
    - crio
    - containerd
  when: container_manager in ["crio", "containerd"]

- name: reset | remove all cri containers
  shell: "set -o pipefail && {{ bin_dir }}/crictl ps -aq | xargs -r {{ bin_dir }}/crictl -t 60s rm"
  args:
    executable: /bin/bash
  register: remove_all_cri_containers
  retries: 5
  until: remove_all_cri_containers.rc == 0
  delay: 5
  tags:
    - crio
    - containerd
  when: container_manager in ["crio", "containerd"] and deploy_container_engine|default(true)

- name: reset | stop and disable crio service
  service:
    name: crio
    state: stopped
    enabled: false
  failed_when: false
  tags: [ crio ]
  when: container_manager == "crio"

- name: reset | forcefully wipe CRI-O's container and image storage
  command: "crio wipe -f"
  failed_when: false
  tags: [ crio ]
  when: container_manager == "crio"

- name: reset | stop all cri pods
  shell: "set -o pipefail && {{ bin_dir }}/crictl pods -q | xargs -r {{ bin_dir }}/crictl -t 60s stopp"
  args:
    executable: /bin/bash
  register: remove_all_cri_containers
  retries: 5
  until: remove_all_cri_containers.rc == 0
  delay: 5
  tags: [ containerd ]
  when: container_manager == "containerd"

- name: reset | remove all cri pods
  shell: "set -o pipefail && {{ bin_dir }}/crictl pods -q | xargs -r {{ bin_dir }}/crictl -t 60s rmp"
  args:
    executable: /bin/bash
  register: remove_all_cri_containers
  retries: 5
  until: remove_all_cri_containers.rc == 0
  delay: 5
  tags: [ containerd ]
  when: container_manager == "containerd"

- name: reset | stop etcd services
  service:
    name: "{{ item }}"
    state: stopped
  with_items:
    - etcd
    - etcd-events
  failed_when: false
  tags:
    - services

- name: reset | remove etcd services
  file:
    path: "/etc/systemd/system/{{ item }}.service"
    state: absent
  with_items:
    - etcd
    - etcd-events
  register: services_removed
  tags:
    - services

- name: reset | gather mounted kubelet dirs  # noqa 301
  shell: set -o pipefail && mount | grep /var/lib/kubelet/ | awk '{print $3}' | tac
  args:
    executable: /bin/bash
    warn: false
  check_mode: no
  register: mounted_dirs
  failed_when: false
  tags:
    - mounts

- name: reset | unmount kubelet dirs  # noqa 301
  command: umount -f {{ item }}
  with_items: "{{ mounted_dirs.stdout_lines }}"
  register: umount_dir
  when: mounted_dirs
  retries: 4
  until: umount_dir.rc == 0
  delay: 5
  tags:
    - mounts

- name: flush iptables
  iptables:
    table: "{{ item }}"
    flush: yes
  with_items:
    - filter
    - nat
    - mangle
  when: flush_iptables|bool
  tags:
    - iptables

- name: Clear IPVS virtual server table
  command: "ipvsadm -C"
  when:
    - kube_proxy_mode == 'ipvs' and inventory_hostname in groups['k8s-cluster']

- name: reset | check kube-ipvs0 network device
  stat:
    path: /sys/class/net/kube-ipvs0
  register: kube_ipvs0

- name: reset | Remove kube-ipvs0
  command: "ip link del kube-ipvs0"
  when:
    - kube_proxy_mode == 'ipvs'
    - kube_ipvs0.stat.exists

- name: reset | check nodelocaldns network device
  stat:
    path: /sys/class/net/nodelocaldns
  register: nodelocaldns_device

- name: reset | Remove nodelocaldns
  command: "ip link del nodelocaldns"
  when:
    - enable_nodelocaldns|default(false)|bool
    - nodelocaldns_device.stat.exists

- name: reset | delete some files and directories
  file:
    path: "{{ item }}"
    state: absent
  with_items:
    - "{{ kube_config_dir }}"
    - /var/lib/kubelet
    - "{{ ansible_env.HOME | default('/root') }}/.kube"
    - "{{ ansible_env.HOME | default('/root') }}/.helm"
    - "{{ etcd_data_dir }}"
    - "{{ etcd_events_data_dir }}"
    - "{{ etcd_config_dir }}"
    - /var/log/calico
    - /etc/cni
    - "{{ nginx_config_dir }}"
    - /etc/dnsmasq.d
    - /etc/dnsmasq.conf
    - /etc/dnsmasq.d-available
    - /etc/etcd.env
    - /etc/calico
    - /etc/weave.env
    - /opt/cni
    - /etc/dhcp/dhclient.d/zdnsupdate.sh
    - /etc/dhcp/dhclient-exit-hooks.d/zdnsupdate
    - /run/flannel
    - /etc/flannel
    - /run/kubernetes
    - /usr/local/share/ca-certificates/etcd-ca.crt
    - /usr/local/share/ca-certificates/kube-ca.crt
    - /usr/local/share/ca-certificates/vault-ca.crt
    - /etc/ssl/certs/etcd-ca.pem
    - /etc/ssl/certs/kube-ca.pem
    - /etc/ssl/certs/vault-ca.crt
    - /etc/pki/ca-trust/source/anchors/etcd-ca.crt
    - /etc/pki/ca-trust/source/anchors/kube-ca.crt
    - /etc/pki/ca-trust/source/anchors/vault-ca.crt
    - /etc/vault
    - /var/log/pods/
    - "{{ bin_dir }}/kubelet"
    - "{{ bin_dir }}/etcd-scripts"
    - "{{ bin_dir }}/etcd"
    - "{{ bin_dir }}/etcd-events"
    - "{{ bin_dir }}/etcdctl"
    - "{{ bin_dir }}/kubernetes-scripts"
    - "{{ bin_dir }}/kubectl"
    - "{{ bin_dir }}/kubeadm"
    - "{{ bin_dir }}/helm"
    - "{{ bin_dir }}/calicoctl"
    - "{{ bin_dir }}/calicoctl.sh"
    - "{{ bin_dir }}/calico-upgrade"
    - "{{ bin_dir }}/weave"
    - "{{ bin_dir }}/crictl"
    - "{{ bin_dir }}/netctl"
    - /var/lib/cni
    - /etc/vault
    - /etc/openvswitch
    - /run/openvswitch
    - /var/lib/kube-router
    - /var/lib/calico
    - /etc/cilium
    - /run/calico
  ignore_errors: yes
  tags:
    - files

- name: reset | remove dns settings from dhclient.conf
  blockinfile:
    path: "{{ item }}"
    state: absent
    marker: "# Ansible entries {mark}"
  failed_when: false
  with_items:
    - /etc/dhclient.conf
    - /etc/dhcp/dhclient.conf
  tags:
    - files
    - dns

- name: reset | remove host entries from /etc/hosts
  blockinfile:
    path: "/etc/hosts"
    state: absent
    marker: "# Ansible inventory hosts {mark}"
  tags:
    - files
    - dns

- name: reset | include file with reset tasks specific to the network_plugin if exists
  include_tasks: "{{ (role_path + '/../network_plugin/' + kube_network_plugin + '/tasks/reset.yml') | realpath  }}"
  when:
    - kube_network_plugin in ['flannel', 'cilium', 'kube-router', 'calico']
  tags:
    - network

- name: reset | Restart network
  service:
    name: >-
      {% if ansible_os_family == "RedHat" -%}
      {%- if ansible_distribution_major_version|int == 8 -%}
      NetworkManager
      {%- else -%}
      network
      {%- endif -%}
      {%- elif ansible_distribution == "Ubuntu" and ansible_distribution_release in ["bionic", "focal"] -%}
      systemd-networkd
      {%- elif ansible_os_family == "Debian" -%}
      networking
      {%- endif %}      
    state: restarted
  when:
    - ansible_os_family not in ["Flatcar Container Linux by Kinvolk"]
    - reset_restart_network
  tags:
    - services
    - network