如果在 Ansible 中可以访问第一个主机，则跳过其他主机 [英] Skip other hosts if first host is reachable in Ansible

问题描述

我的文件包含 Ip 地址，我使用以下方法为我的任务制作此清单

I am having file consists of Ip address I using below method to to make this inventory for my tasks

ips.text

192.168.0.1
192.168.0.2
192.168.0.3
192.168.0.4

ma​​in.yml

    - name: Add Instance IP Addresses to temporary inventory groups
      shell: cat ~/ips.text
      register: serverlist
    - debug: msg={{ serverlist.stdout_lines }}
    - name: Add Instance IP Addresses to temporary inventory groups
    add_host
        groups: working_hosts
        hostname: "{{item}}"
      with_items: "{{ serverlist.stdout_lines }}"

- hosts: working_hosts
  become: yes

现在我想让它像如果 192.168.0.1 是可访问的，那么它应该跳过该文件中的其余 ips，如果 192.168.0.1 是不可访问的，那么只有转到下一个 192.168.0.2.

Now I want to make it like if 192.168.0.1 is reachable then it should skip rest of the ips from that file and if 192.168.0.1 is unreachable then only goes to next 192.168.0.2.

我们如何才能做到这一点?

How can we achieve this?

推荐答案

问:如果可以访问 192.168.0.1，那么它应该跳过其余的 IP."

A:让我们wait_for_connection 在 block 并将连接状态存储在变量 reachable 中.然后使用变量 reachable 创建可到达主机组 reachable 并使用组 groups.reachable.0 中的第一个主机运行新游戏.例如

A: Let's wait_for_connection on all hosts in the block and store the connection status in the variable reachable. Then use the variable reachable to create the group of reachable hosts reachable and run new play with the first host from the group groups.reachable.0. For example

- name: Test reachable hosts
  hosts: working_hosts
  gather_facts: false
  vars:
    connection_timeout: "10"
  tasks:
    - block:
        - wait_for_connection:
            timeout: "{{ connection_timeout }}"
      rescue:
        - set_fact:
            reachable: false
        - meta: clear_host_errors
        - meta: end_host
    - set_fact:
        reachable: true

    - add_host:
        name: '{{ item }}'
        groups: 'reachable'
      loop: "{{ hostvars|dict2items|json_query('[?value.reachable].key') }}"
      run_once: true

- hosts: "{{ groups.reachable.0 }}"
  tasks:
    - debug:
        msg: "{{ inventory_hostname }}"

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