ansible - JSON 操作 - 过滤器和行内联
问题描述
我专注于 Ansible 将一些 F5 集成到 devops 管道中，到目前为止一切都很好，除了一件事。
如果我使用以下代码将一些 vlan 分配给来宾：
- name: Assign VLANS to vCMP Guest
bigip_vcmp_guest:
name: "{{ item.vcmp_name }}"
vlans: "{{ item.vcmp_vlans }}"
provider: "{{ var_provider }}"
delegate_to: localhost
loop: "{{ vcmp }}"
when: vcmp is defined
它会替换所有的 vlan，并且只保留新添加的。
所以我决定从这个配置中收集 vlan 信息，将其复制到一个文件中，附加列表，然后重新推送所有 vlan。这是我为此建立的角色：
- name: Create F5 VLAN File
file:
dest: ./roles/facts/vars/f5vlans.yml
state: touch
delegate_to: localhost
when: facts_vcmp_vlan is defined
- name: Create VLAN List
lineinfile:
dest: ./roles/facts/vars/f5vlans.yml
line: "vlan_list:"
insertafter: EOF
delegate_to: localhost
when: facts_vcmp_vlan is defined
- name: Collect BIG-IP vCMP facts
bigip_device_facts:
gather_subset:
- vcmp-guests
provider: "{{ var_provider }}"
delegate_to: localhost
register: gathered_vlans
when: facts_vcmp_vlan is defined
- name: Debug
debug:
msg: "{{ gathered_vlans }}"
- name: Appened Existing VLANs to List
lineinfile:
dest: ./roles/facts/vars/f5vlans.yml
line: "- {{ item.vcmp_guests }} "
insertafter: EOF
delegate_to: localhost
with_items: "{{ gathered_vlans }}"
when: facts_vcmp_vlan is defined
- 创建文件：好的
- 创建 VLAN 列表：确定
- 收集事实并打印输出：OK（见下面的输出）
ok: [device] => {
"msg": {
"changed": false,
"failed": false,
"queried": true,
"vcmp_guests": [
{
"allowed_slots": [
0
],
"assigned_slots": [
0
],
"boot_priority": 65535,
"cores_per_slot": 2,
"full_path": "name1",
"hostname": "value",
"hotfix_image": "value",
"initial_image": "value",
"mgmt_address": "subnet/24",
"mgmt_network": "IP",
"mgmt_route": "value",
"min_number_of_slots": 1,
"name": "name1",
"number_of_slots": 1,
"ssl_mode": "value",
"state": "value",
"virtual_disk": "value",
"vlans": [
"vlan100",
"vlan101",
"vlan102"
]
},
{
"allowed_slots": [
0
],
"assigned_slots": [
0
],
"boot_priority": 65535,
"cores_per_slot": 2,
"full_path": "name2",
"hostname": "value",
"hotfix_image": "value",
"initial_image": "value",
"mgmt_address": "subnet/24",
"mgmt_network": "IP",
"mgmt_route": "value",
"min_number_of_slots": 1,
"name": "name2",
"number_of_slots": 1,
"ssl_mode": "value",
"state": "value",
"virtual_disk": "value",
"vlans": [
"vlan200",
"vlan201",
"vlan202"
]
},
{
"allowed_slots": [
0
],
"assigned_slots": [
0
],
"boot_priority": 65535,
"cores_per_slot": 2,
"full_path": "name3",
"hostname": "value",
"hotfix_image": "value",
"initial_image": "value",
"mgmt_address": "subnet/24",
"mgmt_network": "IP",
"mgmt_route": "value",
"min_number_of_slots": 1,
"name": "name3",
"number_of_slots": 1,
"ssl_mode": "value",
"state": "value",
"virtual_disk": "value",
"vlans": [
"vlan300",
"vlan301",
"vlan302"
]
}
]
}
}
我的目标是仅使用分配给name: name2的 vlan。所以在我的文件后面加上：
- vlan201
- vlan202
- vlan203
解决方案
您可以为此使用json_queryJMESPath查询语言。
您甚至不需要在这里循环，因为 Ansible 可以将列表转储为带有过滤器的 YAML，例如to_nice_yaml. 而且，......老实说，你甚至不需要一个临时文件，如果这是你在这里实现的（更多关于答案的结尾）。
鉴于剧本：
- hosts: all
gather_facts: no
tasks:
- blockinfile:
dest: ./roles/facts/vars/f5vlans.yml
block: >-
{{
gathered_vlans
| json_query('vcmp_guests[?name==`name2`].vlans []')
| to_nice_yaml
}}
vars:
gathered_vlans:
changed: false
failed: false
queried: true
vcmp_guests:
- allowed_slots:
- 0
assigned_slots:
- 0
boot_priority: 65535
cores_per_slot: 2
full_path: name1
hostname: value
hotfix_image: value
initial_image: value
mgmt_address: subnet/24
mgmt_network: IP
mgmt_route: value
min_number_of_slots: 1
name: name1
number_of_slots: 1
ssl_mode: value
state: value
virtual_disk: value
vlans:
- vlan100
- vlan101
- vlan102
- allowed_slots:
- 0
assigned_slots:
- 0
boot_priority: 65535
cores_per_slot: 2
full_path: name2
hostname: value
hotfix_image: value
initial_image: value
mgmt_address: subnet/24
mgmt_network: IP
mgmt_route: value
min_number_of_slots: 1
name: name2
number_of_slots: 1
ssl_mode: value
state: value
virtual_disk: value
vlans:
- vlan200
- vlan201
- vlan202
- allowed_slots:
- 0
assigned_slots:
- 0
boot_priority: 65535
cores_per_slot: 2
full_path: name3
hostname: value
hotfix_image: value
initial_image: value
mgmt_address: subnet/24
mgmt_network: IP
mgmt_route: value
min_number_of_slots: 1
name: name3
number_of_slots: 1
ssl_mode: value
state: value
virtual_disk: value
vlans:
- vlan300
- vlan301
- vlan302
和文件角色/事实/vars/f5vlans.yml
- vlan-dummy-1
- vlan-dummy-2
这将在文件roles/facts/vars/f5vlans.yml中结束，其中包含：
- vlan-dummy-1
- vlan-dummy-2
# BEGIN ANSIBLE MANAGED BLOCK
- vlan200
- vlan201
- vlan202
# END ANSIBLE MANAGED BLOCK
没有临时文件，这个剧本，在vlan_to_add字典键中保存新的 VLAN：
- hosts: all
gather_facts: no
tasks:
- debug:
msg:
vlan_list: >-
{{
vlan_to_add + gathered_vlans
| json_query('vcmp_guests[?name==`name2`].vlans []')
}}
vars:
vlan_to_add:
- dummy-vlan-1
- dummy-vlan-2
gathered_vlans:
changed: false
failed: false
queried: true
vcmp_guests:
- allowed_slots:
- 0
assigned_slots:
- 0
boot_priority: 65535
cores_per_slot: 2
full_path: name1
hostname: value
hotfix_image: value
initial_image: value
mgmt_address: subnet/24
mgmt_network: IP
mgmt_route: value
min_number_of_slots: 1
name: name1
number_of_slots: 1
ssl_mode: value
state: value
virtual_disk: value
vlans:
- vlan100
- vlan101
- vlan102
- allowed_slots:
- 0
assigned_slots:
- 0
boot_priority: 65535
cores_per_slot: 2
full_path: name2
hostname: value
hotfix_image: value
initial_image: value
mgmt_address: subnet/24
mgmt_network: IP
mgmt_route: value
min_number_of_slots: 1
name: name2
number_of_slots: 1
ssl_mode: value
state: value
virtual_disk: value
vlans:
- vlan200
- vlan201
- vlan202
- allowed_slots:
- 0
assigned_slots:
- 0
boot_priority: 65535
cores_per_slot: 2
full_path: name3
hostname: value
hotfix_image: value
initial_image: value
mgmt_address: subnet/24
mgmt_network: IP
mgmt_route: value
min_number_of_slots: 1
name: name3
number_of_slots: 1
ssl_mode: value
state: value
virtual_disk: value
vlans:
- vlan300
- vlan301
- vlan302
会产生：
PLAY [all] **********************************************************************************************************
TASK [debug] ********************************************************************************************************
ok: [localhost] => {
"msg": {
"vlan_list": [
"dummy-vlan-1",
"dummy-vlan-2",
"vlan200",
"vlan201",
"vlan202"
]
}
}
PLAY RECAP **********************************************************************************************************
localhost : ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
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