Ansible循環相關問題

Question

我有一個劇本，它有多個角色和串行設置，以便它在一臺機器上運行，然後在其他機器上運行。在其中一個角色，我有以下任務：

- name: getting dbnodes IP addresses 
    local_action: shell echo "{% for host in groups['dbnodes'] %}{{ hostvars[host]['ansible_eth0']['ipv4']['address'] }},{% endfor %}" 
    run_once: true 
    register: IPS 

基本上就是我想要做的就是收集所有主機的IP地址，並與IPS註冊它以便今後使用。但是由於串行（我認爲），下面的錯誤導致任務失敗。

TASK [dbcluster : getting dbnodes IP addresses] ******************************** fatal: [162.220.52.190]: FAILED! => {"failed": true, "msg": "the field 'action' has an invalid value, which appears to include a variable that is undefined. The error was: 'dict object' has no attribute 'ansible_eth0'\n\nThe error appears to have been in '/root/tenon-delivery/ansible/roles/dbcluster/tasks/main.yml': line 52, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: getting dbnodes IP addresses\n^here\n"}

在運行ansible dbnode -s setup我可以看到ansible_eth0有一個適當的值。我不明白爲什麼它說這是未定義的。

任何想法如何在同一時間收集所有機器上的事實，同時仍然可以選擇幾個任務/處理程序仍在串行化。

Answer 1

ansible_eth0事實可能在您的任務運行時未知。

你可能想在你的劇本的最頂端添加事實收集玩法：

- hosts: dbnodes 
    gather_facts: yes 
    tasks: 
    - debug: msg="facts gathering" 

- hosts: othernodes 
    tasks: 
    - name: getting dbnodes IP addresses 
     ...