Question

我正尝试在ansible中将字符串追加到列表中，因此基本上我将构建有效负载以删除F5 GTM网络设备中的少数拓扑记录。

我能够创建一个单独的列表，其中包括相应拓扑记录的所有输出。对于输出的每一行，我需要附加一个字符串“ delete”。


- name: Lookup Topology Records  
  bigip_command:
    user: admin
    password: password
    server: gtm.abc.com
    commands: "list gtm topology | grep -i '{{ item }}'"
    warn: no
    validate_certs: no
  register: topology_info
  delegate_to: localhost
  loop: "{{ gtm_pool }}"

- debug: var=topology_info

- name: Sanitize the Topology records of the Pool
  set_fact:
    clean_topology_info: "{{ clean_topology_info | default ([]) + item.stdout_lines  }}"
  loop: "{{ topology_info.results }}"

- debug: var=clean_topology_info


- name: Sanitized Topology Info
  vars:
    topology_item: "{{ item }}"
   set_fact:
     sanitized_topology_info: "{{ sanitized_topology_info | default ([]) + topology_item }}"
  loop: "{{ clean_topology_info }}"

- name: Build payload to delete the Topology Record
  set_fact:
    topology_payload: "{{ topology_payload | default([]) + ['delete'] + item }}"
  loop: "{{ clean_topology_info }}"

- debug: var=topology_payload

------------------------------------------------------------
Debug outputs(stdout_lines) as below :-

"gtm_pool": [
        "test-poo1", 
        "test-pool2"
    ]

debug of "topology_info" :-

"stdout_lines": [
                    [
                        "gtm topology ldns: subnet 10.10.10.0/24 server: pool /Common/test-pool1 {", 
                        "gtm topology ldns: subnet 10.8.22.0/24 server: pool /Common/test-pool1 {"
                    ]
                ]

"stdout_lines": [
                    [
                        "gtm topology ldns: subnet 0.0.0.0/0 server: pool /Common/test-pool2 {"
                    ]


debug of "clean_topology_info":-

"clean_topology_info": [
        [
                        "gtm topology ldns: subnet 10.10.10.0/24 server: pool /Common/test-pool1 {", 
                        "gtm topology ldns: subnet 10.8.22.0/24 server: pool /Common/test-pool1 {", 
        ], 
        [
            "gtm topology ldns: subnet 0.0.0.0/0 server: pool /Common/test-pool2 {",
        ]
    ]

debug of "sanitized_topology_info":-

"sanitized_topology_info": [
             "gtm topology ldns: subnet 10.10.10.0/24 server: pool /Common/test-pool1 {", 
                        "gtm topology ldns: subnet 10.8.22.0/24 server: pool /Common/test-pool1 {", 
           "gtm topology ldns: subnet 0.0.0.0/0 server: pool /Common/test-pool2 {"
        ]



debug of "topology_payload":-

"topology_payload": [
        "delete", 
        "gtm topology ldns: subnet 10.10.10.0/24 server: pool /Common/test-pool1 {", 
                        "gtm topology ldns: subnet 10.8.22.0/24 server: pool /Common/test-pool1 {",  
        "delete", 
       "gtm topology ldns: subnet 0.0.0.0/0 server: pool /Common/test-pool2 {"
    ]


Expected output of topology_payload should be like :-

Basically i need to append a string 'delete' infront of the each output.

"topology_payload": [ 
        "delete gtm topology ldns: subnet 10.10.10.0/24 server: pool /Common/test-pool1 {", 
                        "delete gtm topology ldns: subnet 10.8.22.0/24 server: pool /Common/test-pool1 {",  
       "delete gtm topology ldns: subnet 0.0.0.0/0 server: pool /Common/test-pool2 {"
    ]

topology_payload的预期输出应类似于：-

基本上，我需要在每个输出的前面添加一个字符串'delete'。

“ topology_payload”：[ “删除gtm拓扑ldns：子网10.10.10.0/24服务器：pool / Common / test-pool1 {”， “删除gtm拓扑ldns：子网10.8.22.0/24服务器：池/ Common / test-pool1 {”，
“删除gtm拓扑ldns：子网0.0.0.0/0服务器：池/ Common / test-pool2 {” ]

Answer 1

您可以使用map filter将功能应用于列表中的每个元素。将其与regex_replace结合使用，可以实现所需的结果：

---
- hosts: localhost
  gather_facts: false
  vars:
      string: "prepend "
      list: ["value1", "value2", "value3"]
  tasks:
    - name: "append string to each element in a list"
      set_fact:
          list: "{{ list | map('regex_replace', '(.*)', '{{ string }}\\1') | list }}"
    - debug:
          msg: "{{ list }}"

Answer 2

您是looking for吗？

  vars:
    info: [ 'a', 'b', 'c' ]
  tasks:
    - set_fact:
        payload: "{{ payload|default([]) + [ 'delete ' ~ item ] }}"
      loop: "{{ info }}"
    - debug:
        var: payload

给予：

"payload": [
    "delete a", 
    "delete b", 
    "delete c"
]

要追加删除gtm topology盯着的所有事物

  vars:
    info: [ 'a', 'gtm topology', 'c' ]
  tasks:
    - set_fact:
        payload: "{{ payload|default([]) + [ 'delete ' ~ item ] }}"
      loop: "{{ info }}"
      when: item is search('^gtm topology')
    - debug:
        var: payload

给予：

  payload:
  - delete gtm topology

除了上述条件和

要一直输出到test-pool1

使用filter_plugins

def list_search(l, x):
    r = re.compile(x)
    return list(filter(r.match, l))
def list_index(l, x, *i):
    if len(i) == 0:
        return l.index(x) if x in l else -1
    elif len(i) == 1:
        return l.index(x, i[0]) if x in l[i[0]:] else -1
    else:
        return l.index(x, i[0], i[1]) if x in l[i[0]:i[1]] else -1

下面的戏

  vars:
    info: [ 'a', 'gtm topology 1', 'c', 'test-pool1', 'gtm topology 2', 'd' ]
    stop_regex: '.*pool1.*'
  tasks:
    - set_fact: # Find elements that match stop_regex
        stop_elements: "{{ info|list_search(stop_regex) }}"
    - set_fact: # Find index of the fist element that match stop_regex
        stop_index: "{{ info|list_index(stop_elements.0) }}"
    - set_fact: # Select and transform elements of the list
        payload: "{{ payload|default([]) + [ 'delete ' ~ item ] }}"
      loop: "{{ info[0:stop_index|int] }}"
      when: item is search('^gtm topology')
    - debug:
        var: payload

给予：

  payload:
  - delete gtm topology 1

Answer 3

您可以使用product filter为项目列表添加前缀或后缀：

---
- hosts: localhost
  gather_facts: false
  vars:
      string: "prepend "
      list: ["value1", "value2", "value3"]
  tasks:
    - name: "prefix"
      set_fact:
          prefix_list: "{{ "prefix_" | product(list) | map('join') }}"
    - debug:
          msg: "{{ prefix_list }}"
    - name: "suffix"
      set_fact:
          suffix_list: "{{ list | product(["_suffix"]) | map('join') }}"
    - debug:
          msg: "{{ suffix_list }}"

将字符串追加到Ansible中的列表

3 个答案: