ansible - 使用带有 Ansible 的分隔符从字符串列表创建字典
问题描述
我有一个嵌套的字符串列表,我正在尝试将其转换为字典。该列表似乎采用合理的格式,但每次我附加到它时,我的字典都会被覆盖。
初始名单:
TASK [test first_list] **********************************************************************************************************************************************************************************************************************************************************************************************************
ok: [node11] => {
"first_list": [
[
"DEVNAME: /dev/sanstorage/node11-data103-2fd31b74e1ef5a8006c9ce9000b10399f",
"UUID: 2751719f-d1a2-49b0-9e42-3d686c90d2e6",
"TYPE: xfs"
],
[
"DEVNAME: /dev/sanstorage/node11-data104-2e81f1279171dce656c9ce9000b10399f",
"UUID: 6a6265d6-b103-471e-9e25-e8cc5f5585a8",
"TYPE: xfs"
],
[
"DEVNAME: /dev/sanstorage/node11-data102-2e385a327788d866e6c9ce9000b10399f",
"UUID: 8c52d974-8584-4aa6-89b8-f1e1db016118",
"TYPE: xfs"
],
[
"DEVNAME: /dev/sanstorage/node11-data101-241afe5ab93b5c0ee6c9ce9000b10399f",
"UUID: 94b56164-6717-4b82-8f11-86fd94a39672",
"TYPE: xfs"
],
[
"DEVNAME: /dev/sanstorage/node11-data100-25626d38d4c4239456c9ce9000b10399f",
"UUID: 55a1a388-fe0a-4dd0-980a-a10c5317952e",
"TYPE: xfs"
],
[
"DEVNAME: /dev/sanstorage/node11-data114-231d2661b7ab88f8f6c9ce9000b10399f",
"UUID: f87ad708-1d12-41a5-9441-d32a97b5318c",
"TYPE: ext4"
],
[
"DEVNAME: /dev/sanstorage/node11-data115-2d3a824975e90550f6c9ce9000b10399f",
"UUID: b8b79886-9710-4205-900b-7b9d7d4ad933",
"TYPE: ext4"
],
[
"DEVNAME: /dev/sanstorage/oneview-FA-data8165-284392eae1ad17d846c9ce9000b10399f",
"UUID: c5a43057-676e-49b7-b2a9-b53a40f7010b",
"TYPE: xfs"
],
[
"DEVNAME: /dev/sanstorage/oneview-FA-data3420-2e262703236f9b7046c9ce9000b10399f",
"UUID: 1a70c187-9364-4f48-92f8-f9b9dec9824f",
"TYPE: xfs"
],
[
"DEVNAME: /dev/sanstorage/node11-data112-2464954fd324508e66c9ce9000b10399f",
"UUID: 2238a12e-2ca1-466e-8617-11051e1d612e",
"TYPE: ext4"
],
[
"DEVNAME: /dev/sanstorage/node11-data111-25bb14827531149456c9ce9000b10399f",
"UUID: db37479f-80b0-46b2-85e0-aef679bea164",
"TYPE: ext4"
],
[
"DEVNAME: /dev/sanstorage/node11-data105-28ac6825aa80520d46c9ce9000b10399f",
"UUID: e987fc7c-9a4f-46ea-91f0-4d5f37d3421e",
"TYPE: xfs"
],
[
"DEVNAME: /dev/sanstorage/node11-data113-2177c50c4dd5063506c9ce9000b10399f",
"UUID: 36c1194d-ac4f-4cee-8688-353974cb6be0",
"TYPE: ext4"
]
]
}
从这里开始,我尝试形成一个字典,但最后只存储最后一个列表条目:
TASK [test final_list] **********************************************************************************************************************************************************************************************************************************************************************************************************
ok: [node11] => {
"final_list": {
"DEVNAME": "/dev/sanstorage/node11-data113-2177c50c4dd5063506c9ce9000b10399f",
"TYPE": "ext4",
"UUID": "36c1194d-ac4f-4cee-8688-353974cb6be0"
}
}
理想情况下,它看起来像这样,我猜我需要将字典嵌套在列表中?
"final list": [
{
"DEVNAME: /dev/sanstorage/node11-data103-2fd31b74e1ef5a8006c9ce9000b10399f",
"UUID: 2751719f-d1a2-49b0-9e42-3d686c90d2e6",
"TYPE: xfs"
},
{
"DEVNAME: /dev/sanstorage/node11-data104-2e81f1279171dce656c9ce9000b10399f",
"UUID: 6a6265d6-b103-471e-9e25-e8cc5f5585a8",
"TYPE: xfs"
},
{
"DEVNAME: /dev/sanstorage/node11-data102-2e385a327788d866e6c9ce9000b10399f",
"UUID: 8c52d974-8584-4aa6-89b8-f1e1db016118",
"TYPE: xfs"
},
... snip ...
以下是剧本的重要部分:
- set_fact:
first_list: "{{ first_list | default([]) + [disk_data.split('\n')] }}"
vars:
disk_data: '{{ item.stdout }}'
with_items: "{{ disk_check.results }}"
- name: test first_list
debug:
var: first_list
- set_fact: final_list:{}
- set_fact:
final_list: "{{ final_list | default([]) | combine(dict([ item.partition(':')[::2]|map('trim')])) }}"
with_items: "{{ first_list }}"
- name: test final_list
debug:
var: final_list
想法?
解决方案
TL;博士
- debug:
msg: "{{ disk_check.results | map(attribute='stdout') | map('from_yaml') | list }}"
您没有提供返回的初始任务disk_check
。从您在示例中的用法来看,我认为它是循环中使用的shell
or任务是理所当然的。command
同时,您仍然提供了足够的信息,因此我们可以避免陷入x/y 问题。您的问题基本上是“如何在分隔符上拆分字符串并使用结果创建字典?” 你真正想要的是更多“如何将表示 yaml dict 的字符串解析为实际的 dict?”
开始
- set_fact: first_list: "{{ first_list | default([]) + [disk_data.split('\n')] }}" vars: disk_data: '{{ item.stdout }}' with_items: "{{ disk_check.results }}"
这将遍历您的所有命令结果,stdout
在新行上拆分并将该列表添加到顶级列表中。
由于 的输出shell/command
包含一个stdout_lines
属性,并且我们可以使用jinja2map
过滤器从字典列表中提取属性,因此可以一次性替换它,而无需使用以下 jinja 表达式运行任务:
"{{ disk_check.results | map(attribute='stdout_lines') | list }}"
但我们仍然会走错路。
让我们看看你的一个(重建的)stdout
个人results
"stdout": "DEVNAME: /dev/sanstorage/node11-data102-2e385a327788d866e6c9ce9000b10399f\nUUID: 8c52d974-8584-4aa6-89b8-f1e1db016118\nTYPE: xfs"
这是 yaml 字典的字符串表示形式。Ansible 有一个from_yaml
过滤器。我们可以使用map
过滤器对列表中的每个元素应用过滤器。
下面的剧本尝试复制您的原始数据以一次性显示它
---
- name: Parse a yaml dict in each element of a list
hosts: localhost
gather_facts: false
vars:
example_disks: 3
tasks:
- name: Faking your disk check supposed command
shell: |-
cat <<EOF
DEVNAME: /dev/sanstorage/node{{ (item | string)*2 }}-data{{ (item | string)*3 }}-$(uuidgen)
UUID: $(uuidgen)
TYPE: xfs
EOF
loop: "{{ range(1, example_disks+1) }}"
register: disk_check
- name: Show the original data (use -v to trigger)
debug:
var: disk_check
verbosity: 1
- name: Display a list of dicts from the above result
debug:
msg: "{{ disk_check.results | map(attribute='stdout') | map('from_yaml') | list }}"
并给出(运行-v
以显示中间调试):
PLAY [Parse a yaml dict in each element of a list] *************************************************************************************************************************************************************************************
TASK [Faking your disk check supposed command] *****************************************************************************************************************************************************************************************
changed: [localhost] => (item=1)
changed: [localhost] => (item=2)
changed: [localhost] => (item=3)
TASK [Show the original data (use -v to trigger)] **********************************************************************************************************************************************************************************************************
skipping: [localhost]
TASK [Display a list of dicts from the above result] ***********************************************************************************************************************************************************************************
ok: [localhost] => {
"msg": [
{
"DEVNAME": "/dev/sanstorage/node11-data111-10e7a318-62af-46db-895e-5d94b0c2cf88",
"TYPE": "xfs",
"UUID": "5a87ae1c-c312-4325-88ac-b9cc1edfa69b"
},
{
"DEVNAME": "/dev/sanstorage/node22-data222-18247d1d-87b2-4c7d-8d48-cd333d7530f9",
"TYPE": "xfs",
"UUID": "bc0d7f1a-16e4-4694-b3e2-904e69cc208d"
},
{
"DEVNAME": "/dev/sanstorage/node33-data333-21bc7fde-645f-4cf2-9e18-72d004700085",
"TYPE": "xfs",
"UUID": "58985028-3eb1-4f34-90e9-f0e4c8257607"
}
]
}
PLAY RECAP *****************************************************************************************************************************************************************************************************************************
localhost : ok=2 changed=1 unreachable=0 failed=0 skipped=1 rescued=0 ignored=0
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