来自 2 个列表的 SUM 值

Question

我有以下输出：

 {
    "vmoff": [
        {
            "CONT2": [
                "vm1",
                "vm2",
                "vm5"
            ]
        },
        {
            "CONT1": [
                "vm3",
                "vm4",
                "vm6"
            ]
        }
    ]
}

和

{
    "vmprof2": [
        {
            "proc": {
                "vm1": "0.5",
                "vm2": "0.7",
                "vm3": "1.0",
                "vm4": "0.5",
                "vm5": "0.5",
                "vm6": "0.5"
            },
            "sec_sys": "CONT1"
        },
        {
            "proc": {
                "vm1": "1.0",
                "vm2": "0.7",
                "vm3": "1.0",
                "vm4": "0.7",
                "vm5": "0.5",
                "vm6": "0.7"
            },
            "sec_sys": "CONT2"
        }
    ]
}

我想在vmoff中对每个vm的proc值求和，例如：

proc_steal:
  - sec_sys: CONT1
    proc: 2.0
  - sec_sys: CONT2
    proc: 2.2

获取未激活vm的proc，我对输出感到困惑，不知道使用list还是dict。

Answer 1

我建议您使用自定义过滤器：

创建一个文件夹 filter_plugins 与您的 playbook 处于同一级别。

我创建了一个文件 myfilter.py，其中包含一个名为 extractfilter

的过滤器

.
├── filter_plugins
│   └── myfilter.py
└── playbook.yml

内容如下：

#!/usr/bin/python
class FilterModule(object):

    def filters(self):
        return {
            'extractfilter': self.extractfilter
        }
 
    def extractfilter(self, l1, l2):
        result = []
        ky = {}
        for k in l1:
            ky.update(k)

        for k in l2:
            s = k['sec_sys']
            l = ky[s]
            if s in ky:
                total = 0.0
                proc = k['proc']
                for p in proc:
                    if p in l:
                        total = total + float(proc[p])
                result.append({'sec_sys': s, 'proc': total})

        return result

然后是使用自定义过滤器的剧本：

- name: testplaybook jinja2
  hosts: localhost
  gather_facts: no
  vars:
    vmoff:
      - CONT2:
        - vm1
        - vm2
        - vm5
      - CONT1:
        - vm3
        - vm4
        - vm6
    vmprof2:
      - proc:
          vm1: '0.5'
          vm2: '0.7'
          vm3: '1.0'
          vm4: '0.5'
          vm5: '0.5'
          vm6: '0.5'
        sec_sys: CONT1
      - proc:
          vm1: '1.0'
          vm2: '0.7'
          vm3: '1.0'
          vm4: '0.7'
          vm5: '0.5'
          vm6: '0.7'
        sec_sys: CONT2
  tasks:

    - name: DEFINE VARIABLE SPINE
      set_fact: 
        proc_steal: "{{ vmoff | extractfilter(vmprof2) }}"
 
    - debug: msg="{{  proc_steal }}"

结果：

{
    "msg": [
        {
            "proc": 2.0,
            "sec_sys": "CONT1"
        },
        {
            "proc": 2.2,
            "sec_sys": "CONT2"
        }
    ]
}

如果您对自定义过滤器有疑问，可以使用 jinja:

- name: "make this working"
  hosts: localhost
  vars:
    vmoff:
      - CONT2:
        - vm1
        - vm2
        - vm5
      - CONT1:
        - vm3
        - vm4
        - vm6
    vmprof2:
      - proc:
          vm1: '0.5'
          vm2: '0.7'
          vm3: '1.0'
          vm4: '0.5'
          vm5: '0.5'
          vm6: '0.5'
        sec_sys: CONT1
      - proc:
          vm1: '1.0'
          vm2: '0.7'
          vm3: '1.0'
          vm4: '0.7'
          vm5: '0.5'
          vm6: '0.7'
        sec_sys: CONT2
  tasks:
    - name: list to dict
      set_fact: 
        ky: "{{ ky | d({}) | combine( item ) }}"
      loop: "{{ vmoff }}"

    - name: list to dict
      set_fact: 
        result: "{{ result| d([]) + [{'sec_sys': s, 'proc': total}] }}"
      loop: "{{ vmprof2 }}"
      vars:
        s: "{{ item['sec_sys'] }}"      
        l: "{{ ky[s] }}"
        total: >-
            {%- set st = namespace(tt=0.0) -%}
            {%- for p in item['proc'] if p in l -%}
            {%- set st.tt = st.tt + (item['proc'][p] | float) -%}
            {%- endfor -%}
            {{ st.tt | float }}  
      when: s in ky
      
    - name: list to dict
      debug: 
        msg: "{{ result }}"

来自 2 个列表的 SUM 值

SUM value from 2 lists

ansible

ansible-2.x