cluster-reduce.yml

---
- hosts: node
  become: yes
  gather_facts: no
  vars_files:
    - vars/{{ env }}.yml
  tasks:
    - name: Add offline taint
      shell: kubectl taint node `hostname` Task=offline:NoExecute --overwrite

    - name: Drain node
      shell: kubectl drain `hostname`
      ignore_errors: yes

    - name: Check pod list
      shell: kubectl get pod -o wide --all-namespaces --field-selector spec.nodeName=`hostname` |grep -v NAME|wc -l
      register: all_pod_list
      delegate_to: "{{ ansible_play_hosts | first }}"
      run_once: true
      retries: 6
      delay: 5
      # kube-proxy
      until: all_pod_list.stdout|int == 1

    - name: Delete node
      shell: "kubectl delete node `hostname`"
      ignore_errors: yes

    - name: Kubeadm reset
      shell: kubeadm reset -f
    
    - name: Umount overlay shm
      shell: df -h | egrep 'docker|kubelet|containerd'|awk '{print$NF}'|xargs -r umount

    - name: Stop services
      systemd: 
        name: "{{ item }}"
        state: stopped
        enabled: no
        daemon_reload: yes
      with_items:
        - dockerd
        - containerd
        - kubelet
      ignore_errors: yes