使用 ad-hoc 命令的 Ansible 过滤器

Question

如何使用 ad-hoc 命令过滤 nocache block 或 free block ？我尝试了 ansible centos1 -m setup -a 'filter=ansible_memory_mb.nocache' 但没有将其过滤掉。

ansible centos1 -m setup -a 'filter=ansible_memory_mb'
centos1 | SUCCESS => {
    "ansible_facts": {
        "ansible_memory_mb": {
            "nocache": {
                "free": 11808,
                "used": 926
            },
            "real": {
                "free": 10686,
                "total": 12734,
                "used": 2048
            },
            "swap": {
                "cached": 0,
                "free": 4096,
                "total": 4096,
                "used": 0
            }
        },
        "discovered_interpreter_python": "/usr/libexec/platform-python"
    },
    "changed": false
}

Answer 1

如果你想尝试使用ansible命令，你必须与grep和head混合使用:

ansible centos -m setup -a 'filter=ansible_memory_mb' | grep -Eo [0-9]+ | head -1

但您应该使用 playbook:var 结果将包含所需的值。

- name: test
  hosts: centos1
  
  tasks:
    - name: set vars
      set_fact: result="{{ ansible_memory_mb.nocache.free}}" 
    - name: show
      debug:
        var: result

---

结果:

TASK [show] ***********************************************************************************************************************************************************************
ok: [localhost] => {
    "result": "712"
}