kubeasz/playbooks/32.delnode.yml

# WARNNING:  this playbook will clean the node {{ NODE_TO_DEL }}

- hosts: localhost 
  tasks:
  - fail: msg="you CAN NOT delete the last member of kube_master!"
    when: "groups['kube_master']|length < 2 and NODE_TO_DEL in groups['kube_master']"

  - name: 注册变量 K8S 主版本
    shell: echo {{ K8S_VER }}|awk -F. '{print $1"."$2}'
    register: K8S_VER_MAIN

  - name: 设置kubectl drain 参数
    set_fact: DRAIN_OPT="--delete-emptydir-data --ignore-daemonsets --force"
    when: "K8S_VER_MAIN.stdout|float > 1.19"

  - name: 设置kubectl drain 参数
    set_fact: DRAIN_OPT="--delete-local-data --ignore-daemonsets --force"
    when: "K8S_VER_MAIN.stdout|float < 1.20"

  - name: debug info
    debug: var="DRAIN_OPT"

  - name: get the node name to delete
    shell: "{{ base_dir }}/bin/kubectl get node -owide|grep ' {{ NODE_TO_DEL }} '|awk '{print $1}'"
    register: NODE_NAME

  - debug: var="NODE_NAME.stdout"

  - name: run kubectl drain @{{ NODE_NAME.stdout }}
    shell: "{{ base_dir }}/bin/kubectl drain {{ NODE_NAME.stdout }} {{ DRAIN_OPT }}"
    #ignore_errors: true

  - name: clean node {{ NODE_TO_DEL }}
    shell: "cd {{ base_dir }} && ansible-playbook -i clusters/{{ CLUSTER }}/hosts \
              roles/clean/clean_node.yml \
              -e NODE_TO_CLEAN={{ NODE_TO_DEL }} \
              -e DEL_NODE=yes \
              -e DEL_LB=yes >> /tmp/ansible-`date +'%Y%m%d%H%M%S'`.log 2>&1 \
            || echo 'data not cleaned on {{ NODE_TO_DEL }}'"
    register: CLEAN_STATUS

  - debug: var="CLEAN_STATUS"

  - name: run kubectl delete node {{ NODE_NAME.stdout }}
    shell: "{{ base_dir }}/bin/kubectl delete node {{ NODE_NAME.stdout }}"
    ignore_errors: true

  # lineinfile is inadequate to delete lines between some specific line range
  - name: remove the node's entry in hosts
    shell: 'sed -i "/^\[kube_node/,/^\[harbor/ {/^{{ NODE_TO_DEL }}$/d}" {{ base_dir }}/clusters/{{ CLUSTER }}/hosts'
    args:
      warn: false

  # lineinfile is inadequate to delete lines between some specific line range
  - name: remove the node's entry in hosts
    shell: 'sed -i "/^\[kube_node/,/^\[harbor/ {/^{{ NODE_TO_DEL }} /d}" {{ base_dir }}/clusters/{{ CLUSTER }}/hosts'
    args:
      warn: false