ansible - 如果位数少于三，则加零

Question

我有裸机服务器，我想通过代理为串行控制台设置一个特定端口，我决定从 ip 的最后一个八位位组创建端口，但有时服务器在最后一个八位位组中有两位数字，并且在这种情况下，我希望为他们添加零。

例子:

---
- name: Test
  hosts: test
  gather_facts: no
  tasks:
    - name: IPV4 address lookup for node
      set_fact:
        ip: "{{ lookup('community.general.dig', '{{ inventory_hostname }}-ipmi.mydomain.com') }}"
      delegate_to: localhost
    - name: Set port for serial console
      debug:
        msg: "Console port will set 48{{ ip.split('.')[3] }}"

输出:

TASK [IPV4 address lookup for node] ************************************************************************************************************************************************************************
ok: [hostA] => {
    "ansible_facts": {
        "ip": "10.100.100.25"
    },
    "changed": false
}
ok: [hostB] => {
    "ansible_facts": {
        "ip": "10.101.100.203"
    },
    "changed": false
}

TASK [Set port for serial console] *************************************************************************************************************************************************************************
ok: [hostA] => {
    "msg": "Console port will set 4825"
}
ok: [hostB] => {
    "msg": "Console port will set 48203"
}

问题是我还需要为hostA设置48K之后的端口。这可以用 Ansible 完成吗？

Answer 1

使用format .例如，剧本

- hosts: localhost
  vars:
    ip:
      - 10.100.100.2
      - 10.100.100.25
      - 10.101.100.203
    prefix: 48
  tasks:
    - debug:
        msg: "{{ item }}:{{ prefix }}{{ console_port }}"
      loop: "{{ ip }}"
      vars:
        console_port: "{{ '%03d'|format(item.split('.')|last|int) }}"

给出(删节)

  msg: 10.100.100.2:48002
  msg: 10.100.100.25:48025
  msg: 10.101.100.203:48203