如何在 Ansible 中遍历这本字典？
How to loop over this dictionary in Ansible?
假设我有这本词典
war_files:
server1:
- file1.war
- file2.war
server2:
- file1.war
- file2.war
- file3.war
现在我只想遍历每个项目（键），然后遍历键（值）中的每个项目。我这样做了
- name: Loop over the dictionary
debug: msg="Key={{ item.key }} value={{ item.value }}"
with_dict: "{{ war_files }}"
我明白了。这当然是正确的，但不是我想要的。
ok: [localhost] => (item={'value': [u'file1.war', u'file2.war'], 'key': u'server1'}) => {
"item": {
"key": "server1",
"value": [
"file1.war",
"file2.war"
]
},
"msg": "Server=server1, WAR=[u'file1.war', u'file2.war']"
}
ok: [localhost] => (item={'value': [u'file1.war', u'file2.war', u'file3.war'], 'key': u'server2'}) => {
"item": {
"key": "server2",
"value": [
"file1.war",
"file2.war",
"file3.war"
]
},
"msg": "Server=server2, WAR=[u'file1.war', u'file2.war', u'file3.war']"
}
我想要得到这样的输出
"msg": "Server=server1, WAR=file1.war"
"msg": "Server=server1, WAR=file2.war"
"msg": "Server=server2, WAR=file1.war"
"msg": "Server=server2, WAR=file2.war"
"msg": "Server=server2, WAR=file3.war"
IOW，我如何编写一个任务来遍历字典以便遍历每个键，然后遍历每个键中的项目？本质上，我有一个嵌套数组并想对其进行迭代？
编辑：在撰写此答案时，Ansible 2.6 尚未发布。请阅读@tmoschou 提供的答案，因为它好多了。
好吧，我找不到一个非常简单的方法来做到这一点，但是，通过一点点 jinja2，我们可以实现这样的事情：
/tmp ❯❯❯ cat example.yml
---
- hosts: 127.0.0.1
vars:
war_files:
server1:
- file1.war
- file2.war
server2:
- file1.war
- file2.war
- file3.war
tasks:
- set_fact:
war_files_list_of_dicts: |
{% set res = [] -%}
{% for key in war_files.keys() -%}
{% for value in war_files[key] -%}
{% set ignored = res.extend([{'Server': key, 'WAR':value}]) -%}
{%- endfor %}
{%- endfor %}
{{ res }}
- name: let's debug the crap out of this
debug: var=war_files_list_of_dicts
- name: Servers and their WARs!!!
debug:
msg: "Server={{ item.Server }}, WAR={{ item.WAR }}"
with_items: "{{ war_files_list_of_dicts }}"
并且，当剧本是 运行 时：
/tmp ❯❯❯ ansible-playbook example.yml
[WARNING]: provided hosts list is empty, only localhost is available
PLAY [127.0.0.1] ***************************************************************
TASK [setup] *******************************************************************
ok: [127.0.0.1]
TASK [set_fact] ****************************************************************
ok: [127.0.0.1]
TASK [let's debug the crap out of this] ****************************************
ok: [127.0.0.1] => {
"war_files_list_of_dicts": [
{
"Server": "server1",
"WAR": "file1.war"
},
{
"Server": "server1",
"WAR": "file2.war"
},
{
"Server": "server2",
"WAR": "file1.war"
},
{
"Server": "server2",
"WAR": "file2.war"
},
{
"Server": "server2",
"WAR": "file3.war"
}
]
}
TASK [Servers and their WARs!!!] ***********************************************
ok: [127.0.0.1] => (item={'WAR': u'file1.war', 'Server': u'server1'}) => {
"item": {
"Server": "server1",
"WAR": "file1.war"
},
"msg": "Server=server1, WAR=file1.war"
}
ok: [127.0.0.1] => (item={'WAR': u'file2.war', 'Server': u'server1'}) => {
"item": {
"Server": "server1",
"WAR": "file2.war"
},
"msg": "Server=server1, WAR=file2.war"
}
ok: [127.0.0.1] => (item={'WAR': u'file1.war', 'Server': u'server2'}) => {
"item": {
"Server": "server2",
"WAR": "file1.war"
},
"msg": "Server=server2, WAR=file1.war"
}
ok: [127.0.0.1] => (item={'WAR': u'file2.war', 'Server': u'server2'}) => {
"item": {
"Server": "server2",
"WAR": "file2.war"
},
"msg": "Server=server2, WAR=file2.war"
}
ok: [127.0.0.1] => (item={'WAR': u'file3.war', 'Server': u'server2'}) => {
"item": {
"Server": "server2",
"WAR": "file3.war"
},
"msg": "Server=server2, WAR=file3.war"
}
PLAY RECAP *********************************************************************
127.0.0.1 : ok=4 changed=0 unreachable=0 failed=0
现在 Ansible 允许这样做
- name: add several users
user:
name: "{{ item.name }}"
state: present
groups: "{{ item.groups }}"
with_items:
- { name: 'testuser1', groups: 'wheel' }
- { name: 'testuser2', groups: 'root' }
怎么样
- hosts: localhost
vars:
war_files:
server1:
- file1.war
- file2.war
server2:
- file1.war
- file2.war
- file3.war
tasks:
- name: Loop over subelements of the dictionary
debug:
msg: "Key={{ item.0.key }} value={{ item.1 }}"
loop: "{{ war_files | dict2items | subelements('value') }}"
dict2items、subelements 过滤器将出现在 Ansible 2.6 中。
仅供参考，如果 objective 的过滤器不存在，您可以在 python 中编写自己的过滤器，而不必求助于 jinja2 hacks。 Ansible 易于扩展； filter_plugins/*.py 中的过滤器默认在您的 plays/roles 附近搜索并自动包含 - 有关详细信息，请参阅 Developing Plugins。
这是我首选的字典循环方式：
input_data.yml 包含以下内容：
----
input_data:
item_1:
id: 1
info: "Info field number 1"
item_2:
id: 2
info: "Info field number 2"
然后我使用 keys() 函数在游戏中使用类似于上面的数据结构，并使用 with_items:
迭代数据
---
- hosts: localhost
gather_facts: false
connection: local
tasks:
- name: Include dictionary data
include_vars:
file: data.yml
- name: Show info field from data.yml
debug:
msg: "Id: {{ input_data[item]['id'] }} - info: {{ input_data[item]['info'] }}"
with_items: "{{ input_data.keys() | list }}"
以上剧本产生以下输出：
PLAY [localhost] ***********************************************************
TASK [Include dictionary data] *********************************************
ok: [localhost]
TASK [Show info field from data.yml] ***************************************
ok: [localhost] => (item=item_2) => {
"msg": "Id: 2 - info: Info field item 2"
}
ok: [localhost] => (item=item_3) => {
"msg": "Id: 3 - info: Info field item 3"
}
ok: [localhost] => (item=item_1) => {
"msg": "Id: 1 - info: Info field item 1"
}
PLAY RECAP *****************************************************************
localhost : ok=2 changed=0 unreachable=0 failed=0
dict2items
我发现自己想要遍历一组异构的键及其关联值，并在任务中使用键值对。 dict2items 过滤器是我发现的最不痛苦的方法。你可以在 Ansible 2.6
中找到 dict2items
示例字典
systemsetup:
remotelogin: "On"
timezone: "Europe/Oslo"
usingnetworktime: "On"
sleep: 0
computersleep: 0
displaysleep: 0
harddisksleep: 0
allowpowerbuttontosleepcomputer: "Off"
wakeonnetworkaccess: "On"
restartfreeze: "On"
restartpowerfailure: "On"
示例任务
---
- debug:
msg: "KEY: {{ item.key }}, VALUE: {{ item.value }}"
loop: "{{ systemsetup | dict2items }}"
一种对我有用的方法是使用 with_dict。注意字典不应该被命名。只是键值对。
- name: ssh config
lineinfile:
dest: /etc/ssh/sshd_config
regexp: '^#?\s*{{item.key}}\s'
line: '{{item.key}} {{item.value}}'
state: present
with_dict:
LoginGraceTime: "1m"
PermitRootLogin: "yes"
PubkeyAuthentication: "yes"
PasswordAuthentication: "no"
PermitEmptyPasswords: "no"
IgnoreRhosts: "yes"
Protocol: 2
假设我有这本词典
war_files:
server1:
- file1.war
- file2.war
server2:
- file1.war
- file2.war
- file3.war
现在我只想遍历每个项目（键），然后遍历键（值）中的每个项目。我这样做了
- name: Loop over the dictionary
debug: msg="Key={{ item.key }} value={{ item.value }}"
with_dict: "{{ war_files }}"
我明白了。这当然是正确的，但不是我想要的。
ok: [localhost] => (item={'value': [u'file1.war', u'file2.war'], 'key': u'server1'}) => {
"item": {
"key": "server1",
"value": [
"file1.war",
"file2.war"
]
},
"msg": "Server=server1, WAR=[u'file1.war', u'file2.war']"
}
ok: [localhost] => (item={'value': [u'file1.war', u'file2.war', u'file3.war'], 'key': u'server2'}) => {
"item": {
"key": "server2",
"value": [
"file1.war",
"file2.war",
"file3.war"
]
},
"msg": "Server=server2, WAR=[u'file1.war', u'file2.war', u'file3.war']"
}
我想要得到这样的输出
"msg": "Server=server1, WAR=file1.war"
"msg": "Server=server1, WAR=file2.war"
"msg": "Server=server2, WAR=file1.war"
"msg": "Server=server2, WAR=file2.war"
"msg": "Server=server2, WAR=file3.war"
IOW，我如何编写一个任务来遍历字典以便遍历每个键，然后遍历每个键中的项目？本质上，我有一个嵌套数组并想对其进行迭代？
编辑：在撰写此答案时，Ansible 2.6 尚未发布。请阅读@tmoschou 提供的答案，因为它好多了。
好吧，我找不到一个非常简单的方法来做到这一点，但是，通过一点点 jinja2，我们可以实现这样的事情：
/tmp ❯❯❯ cat example.yml
---
- hosts: 127.0.0.1
vars:
war_files:
server1:
- file1.war
- file2.war
server2:
- file1.war
- file2.war
- file3.war
tasks:
- set_fact:
war_files_list_of_dicts: |
{% set res = [] -%}
{% for key in war_files.keys() -%}
{% for value in war_files[key] -%}
{% set ignored = res.extend([{'Server': key, 'WAR':value}]) -%}
{%- endfor %}
{%- endfor %}
{{ res }}
- name: let's debug the crap out of this
debug: var=war_files_list_of_dicts
- name: Servers and their WARs!!!
debug:
msg: "Server={{ item.Server }}, WAR={{ item.WAR }}"
with_items: "{{ war_files_list_of_dicts }}"
并且，当剧本是 运行 时：
/tmp ❯❯❯ ansible-playbook example.yml
[WARNING]: provided hosts list is empty, only localhost is available
PLAY [127.0.0.1] ***************************************************************
TASK [setup] *******************************************************************
ok: [127.0.0.1]
TASK [set_fact] ****************************************************************
ok: [127.0.0.1]
TASK [let's debug the crap out of this] ****************************************
ok: [127.0.0.1] => {
"war_files_list_of_dicts": [
{
"Server": "server1",
"WAR": "file1.war"
},
{
"Server": "server1",
"WAR": "file2.war"
},
{
"Server": "server2",
"WAR": "file1.war"
},
{
"Server": "server2",
"WAR": "file2.war"
},
{
"Server": "server2",
"WAR": "file3.war"
}
]
}
TASK [Servers and their WARs!!!] ***********************************************
ok: [127.0.0.1] => (item={'WAR': u'file1.war', 'Server': u'server1'}) => {
"item": {
"Server": "server1",
"WAR": "file1.war"
},
"msg": "Server=server1, WAR=file1.war"
}
ok: [127.0.0.1] => (item={'WAR': u'file2.war', 'Server': u'server1'}) => {
"item": {
"Server": "server1",
"WAR": "file2.war"
},
"msg": "Server=server1, WAR=file2.war"
}
ok: [127.0.0.1] => (item={'WAR': u'file1.war', 'Server': u'server2'}) => {
"item": {
"Server": "server2",
"WAR": "file1.war"
},
"msg": "Server=server2, WAR=file1.war"
}
ok: [127.0.0.1] => (item={'WAR': u'file2.war', 'Server': u'server2'}) => {
"item": {
"Server": "server2",
"WAR": "file2.war"
},
"msg": "Server=server2, WAR=file2.war"
}
ok: [127.0.0.1] => (item={'WAR': u'file3.war', 'Server': u'server2'}) => {
"item": {
"Server": "server2",
"WAR": "file3.war"
},
"msg": "Server=server2, WAR=file3.war"
}
PLAY RECAP *********************************************************************
127.0.0.1 : ok=4 changed=0 unreachable=0 failed=0
现在 Ansible 允许这样做
- name: add several users
user:
name: "{{ item.name }}"
state: present
groups: "{{ item.groups }}"
with_items:
- { name: 'testuser1', groups: 'wheel' }
- { name: 'testuser2', groups: 'root' }
怎么样
- hosts: localhost
vars:
war_files:
server1:
- file1.war
- file2.war
server2:
- file1.war
- file2.war
- file3.war
tasks:
- name: Loop over subelements of the dictionary
debug:
msg: "Key={{ item.0.key }} value={{ item.1 }}"
loop: "{{ war_files | dict2items | subelements('value') }}"
dict2items、subelements 过滤器将出现在 Ansible 2.6 中。
仅供参考，如果 objective 的过滤器不存在，您可以在 python 中编写自己的过滤器，而不必求助于 jinja2 hacks。 Ansible 易于扩展； filter_plugins/*.py 中的过滤器默认在您的 plays/roles 附近搜索并自动包含 - 有关详细信息，请参阅 Developing Plugins。
这是我首选的字典循环方式：
input_data.yml 包含以下内容：
----
input_data:
item_1:
id: 1
info: "Info field number 1"
item_2:
id: 2
info: "Info field number 2"
然后我使用 keys() 函数在游戏中使用类似于上面的数据结构，并使用 with_items:
迭代数据---
- hosts: localhost
gather_facts: false
connection: local
tasks:
- name: Include dictionary data
include_vars:
file: data.yml
- name: Show info field from data.yml
debug:
msg: "Id: {{ input_data[item]['id'] }} - info: {{ input_data[item]['info'] }}"
with_items: "{{ input_data.keys() | list }}"
以上剧本产生以下输出：
PLAY [localhost] ***********************************************************
TASK [Include dictionary data] *********************************************
ok: [localhost]
TASK [Show info field from data.yml] ***************************************
ok: [localhost] => (item=item_2) => {
"msg": "Id: 2 - info: Info field item 2"
}
ok: [localhost] => (item=item_3) => {
"msg": "Id: 3 - info: Info field item 3"
}
ok: [localhost] => (item=item_1) => {
"msg": "Id: 1 - info: Info field item 1"
}
PLAY RECAP *****************************************************************
localhost : ok=2 changed=0 unreachable=0 failed=0
dict2items
我发现自己想要遍历一组异构的键及其关联值，并在任务中使用键值对。 dict2items 过滤器是我发现的最不痛苦的方法。你可以在 Ansible 2.6
示例字典
systemsetup:
remotelogin: "On"
timezone: "Europe/Oslo"
usingnetworktime: "On"
sleep: 0
computersleep: 0
displaysleep: 0
harddisksleep: 0
allowpowerbuttontosleepcomputer: "Off"
wakeonnetworkaccess: "On"
restartfreeze: "On"
restartpowerfailure: "On"
示例任务
---
- debug:
msg: "KEY: {{ item.key }}, VALUE: {{ item.value }}"
loop: "{{ systemsetup | dict2items }}"
一种对我有用的方法是使用 with_dict。注意字典不应该被命名。只是键值对。
- name: ssh config
lineinfile:
dest: /etc/ssh/sshd_config
regexp: '^#?\s*{{item.key}}\s'
line: '{{item.key}} {{item.value}}'
state: present
with_dict:
LoginGraceTime: "1m"
PermitRootLogin: "yes"
PubkeyAuthentication: "yes"
PasswordAuthentication: "no"
PermitEmptyPasswords: "no"
IgnoreRhosts: "yes"
Protocol: 2