从列表中选择最后2行stdout_lines

- local_action: copy content={{ init_output.stdout_lines[-2:] }} dest="./join-command"

可以格式化块中的行。例如

- local_action:
        module: copy
        content: |
          {{ init_output.stdout_lines[-2] }}
          {{ init_output.stdout_lines[-1] }}
        dest: "./join-command"

要在循环中追加行，请尝试

- local_action:
        module: lineinfile
        path: "./join-command"
        line: "{{ item }}"
        insertafter: EOF
        create: true
      loop: "{{ init_output.stdout_lines[-2:] }}"

我遇到了这类问题，不想将join命令复制到本地文件，所以我用set_fact代替了它：

- set_fact:
    join_cmd: '{{ init_output.stdout_lines[-2][:-2] }}{{ init_output.stdout_lines[-1] }}'

我做了这个...

- name: kubeadm init
  shell: |
    kubeadm init --control-plane-endpoint \
    localhost \
    --control-plane-endpoint kube-api.local >> /tmp/run_kube_init.sh
  when: master == "yes"

- name: Get join from master
  fetch:
    src: "/tmp/run_kube_init.sh"
    dest: "/tmp/run_kube_init.sh"
    flat: yes
  when: ansible_hostname == 'k-master'

- name: Add join file to nodes
  copy:
    src: "/tmp/run_kube_init.sh"
    dest: "/tmp/run_kube_init.sh"
  when: master == "no"

- name: Extract join token for nodes
  shell: tail -n +2 /tmp/run_kube_init.sh | head -n -1 | awk '{print $5}' | tail -n 1
  register: JOIN_TOKEN

- set_fact:
    join_token: "{{ JOIN_TOKEN.stdout }}"

- name: join nodes
  shell: |
    kubeadm join kube-api.local:6443 \
    --token {{ JOIN_TOKEN.stdout }} \
    --discovery-token-unsafe-skip-ca-verification
  when: master == "no"

- name: rm /tmp/run_kube_init.sh
  ansible.builtin.file:
    path: /tmp/run_kube_init.sh
    state: absent