如何使用 Ansible 官方模块更高效地向 VMware VM 主机添加磁盘？
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【中文标题】如何使用 Ansible 官方模块更高效地向 VMware VM 主机添加磁盘？【英文标题】：How to add disk to VMware's VM host more efficiently by using Ansible offical module? 【发布时间】：2020-03-06 10:00:08 【问题描述】：环境
操作系统版本：CentOS 7.5 Ansible 版本：2.8.4 和 python 2.7.5 ESXi 和 VCenter 版本：6.5.2目的
我已经完成了我的代码，但我想知道是否有更好的方法通过 Ansible 官方模块将磁盘添加到 VM 主机。
我的方法
vmware_guest_disk_facts 的返回消息
TASK [get VM info] *******************************************************************************************************
ok: [TFGH0001.TFGH.COM -> localhost] => changed=false
guest_disk_facts:
'0':
backing_datastore: VCENTER01_DS01
backing_eagerlyscrub: false
backing_filename: '[VCENTER01_DS01] TFGH0001/TFGH0001-000001.vmdk'
backing_thinprovisioned: false
backing_type: FlatVer2
backing_uuid: 6000C294-d22d-06a9-c89b-119e13fffe33
backing_writethrough: false
capacity_in_bytes: 32212254720
capacity_in_kb: 31457280
controller_key: 1000
key: 2000
label: Hard disk 1
summary: 31,457,280 KB
unit_number: 0
'1':
backing_datastore: VCENTER01_DS01
backing_eagerlyscrub: false
backing_filename: '[VCENTER01_DS01] TFGH0001/TFGH0001_3.vmdk'
backing_thinprovisioned: false
backing_type: FlatVer2
backing_uuid: 6000C293-ae37-30f6-b684-d5b2416ff2f8
backing_writethrough: false
capacity_in_bytes: 10737418240
capacity_in_kb: 10485760
controller_key: 1000
key: 2001
label: Hard disk 2
summary: 10,485,760 KB
unit_number: 1
我的剧本
---
- hosts: all
remote_user: kai
become: yes
become_user: root
become_method: sudo
gather_facts: true
vars:
vcenter_host: "VCENTER01"
vcenter_username: "TFGH\\kaikudou"
vcenter_password: xxxxxxxxx
target_host: "TFGH0001"
tasks:
- name: get VM info
vmware_guest_disk_facts:
hostname: " vcenter_host "
username: " vcenter_username "
password: " vcenter_password "
validate_certs: False
datacenter: " vcenter_host "
name: " target_host "
delegate_to: localhost
register: vm_disk_info
# - name: show vm_disk_info
# debug:
# msg: " vm_disk_info.guest_disk_facts['0'].backing_datastore "
- name: Set empty list to store varialbe
set_fact:
all_scsi_number_list: [] # A list to store all scsi device number
scsi_0: [] # A list to store scsi 0's device for counting the quantity
scsi_1: [] # A list to store scsi 1's device for counting the quantity
scsi_2: [] # A list to store scsi 2's device for counting the quantity
scsi_3: [] # A list to store scsi 3's device for counting the quantity
all_unit_number_list: [] # A list to store the device number from scsi controller
- name: Set variable of datastore
set_fact:
host_datastore: " vm_disk_info.guest_disk_facts['0'].backing_datastore "
- name: Store scsi_number into all_scsi_number_list
set_fact:
all_scsi_number_list: " all_scsi_number_list + [vm_disk_info.guest_disk_facts[item].controller_key] "
loop: " vm_disk_info.guest_disk_facts.keys() "
- name: Find out scsi_controller 0 and store into scsi_0
set_fact:
scsi_0 : " scsi_0 + [item] "
loop: " all_scsi_number_list "
when: item == 1000
- name: Find out the scsi_controller 1 and store into scsi_1
set_fact:
scsi_1 : " scsi_1 + [item] "
loop: " all_scsi_number_list "
when: item == 1001
- name: Find out the scsi_controller 2 and store into scsi_2
set_fact:
scsi_2 : " scsi_2 + [item] "
loop: " all_scsi_number_list "
when: item == 1002
- name: Find out the scsi_controller 3 and store into scsi_3
set_fact:
scsi_3 : " scsi_3 + [item] "
loop: " all_scsi_number_list "
when: item == 1003
- name: Calcualte the quantity of scsi_*
set_fact:
scsi_0_number: " scsi_0 | length "
scsi_1_number: " scsi_1 | length "
scsi_2_number: " scsi_2 | length "
scsi_3_number: " scsi_3 | length "
- name: Verify the scsi controller's number because snapshot will also cost the device so less than 7 to prevent
set_fact:
scsi_number: " item.src "
loop:
- src: "0", when: " (scsi_0_number <= '6' and scsi_0_number != '0') or (scsi_0_number == '0') "
- src: "1", when: " (scsi_1_number <= '6' and scsi_1_number != '0') or (scsi_1_number == '0') "
- src: "2", when: " (scsi_2_number <= '6' and scsi_2_number != '0') or (scsi_2_number == '0') "
- src: "3", when: " (scsi_3_number <= '6' and scsi_3_number != '0') or (scsi_3_number == '0') "
when: item.when
# - name: Show scsi_number which we get
# debug:
# msg: " scsi_number "
- name: Change the scsi_number we obtained to 4 digit number
set_fact:
scsi_digit_number: " item.src | int "
loop:
- src: "1000", when: " scsi_number == '0' "
- src: "1001", when: " scsi_number == '1' "
- src: "1002", when: " scsi_number == '2' "
- src: "1003", when: " scsi_number == '3' "
when: item.when
# - name: Show scsi_digit_number which we get
# debug:
# msg: " scsi_digit_number "
- name: Check the number of devices from the scci_number we obtained
set_fact:
all_unit_number_list: " all_unit_number_list + [vm_disk_info.guest_disk_facts[item].unit_number] "
loop: " vm_disk_info.guest_disk_facts.keys() "
when: vm_disk_info.guest_disk_facts[item].controller_key == scsi_digit_number | int
# - name: Show all_unit_number_list which we get
# debug:
# msg: " all_unit_number_list | length | type_debug "
- name: Find the max number in all_unit_number_list then plus 1 to add new disk
set_fact:
disk_number: " all_unit_number_list | max + 1 "
ignore_errors: yes
- name: If we have to add new scsi controller then the all_unit_number_list will be empty list, so we need to prevent it failed
set_fact:
disk_number: 0
when: all_unit_number_list | length == 0
- name: add disk
vmware_guest_disk:
hostname: " vcenter_host "
username: " vcenter_username "
password: " vcenter_password "
validate_certs: False
datacenter: " vcenter_host "
name: " target_host "
disk:
- size_gb: 2
type: thin
state: present
datastore: " host_datastore "
# autoselect_datastore: True
scsi_controller: " scsi_number | int "
unit_number: " disk_number | int "
scsi_type: 'paravirtual'
根据VMware offical document 1 VM 主机只能有 4 个 scsi 控制器，每个可以连接 15 个设备。所以我必须写很多条件来防止它。
奇怪的是，从VCenter添加硬盘时，不会触发硬盘数量超过7的问题。但是，Ansible的模块在unit_number超过7时无法增加硬盘，必须换另一个SCSI控制器。
除了这样做，还有其他更好的方法吗？或者我可以参考和研究的东西？
感谢您的帮助和建议！
【问题讨论】：
【参考方案1】：我试着重新表述一下这个问题。这远非完美，因为它不会考虑编号中的“漏洞”（即从序列中删除的磁盘或控制器）。但我认为您当前的实施也没有。我的应该使用更少的变量分配，如果没有更多可用的插槽，它将优雅地失败。
从客户机获取磁盘信息（例如粘贴在 var 中）。 根据信息，循环配置控制器的数量。对于每个控制器，记录其密钥、数量、设备数量和最大配置的设备 ID。 从列表中提取具有可用插槽的第一个控制器 如果失败，则创建一个空的控制器信息，增加 scsi 设备号；如果达到最大值，则失败。注意：我使用了 json_query，所以你需要在你的 ansible 控制器机器上pip(3) install jmespath 来运行示例。
剧本：
---
- name: My take to your vmware disk management question
hosts: localhost
gather_facts: false
vars:
# Info copied from your example.
vcenter_host: "VCENTER01"
vcenter_username: "TFGH\\kaikudou"
vcenter_password: xxxxxxxxx
target_host: "TFGH0001"
# Max number of devices per scsi controller
scsi_max_devices: 15
# Max id for scsi controllers
scsi_max_controller_id: 3
# Calling the two following vars before getting facts will fail
# but since we don't need to loop to get them they can be statically
# declared in playbook vars
scsi_controller_unique_keys: >-
vm_disk_info.guest_disk_facts
| dict2items
| map(attribute='value.controller_key')
| list
| unique
| sort
host_datastore: " vm_disk_info.guest_disk_facts['0'].backing_datastore "
# Your example data to play with (minified, single line)
# To take from module call return IRL.
vm_disk_info: "guest_disk_facts":"0":"backing_datastore":"VCENTER01_DS01","backing_eagerlyscrub":false,"backing_filename":"[VCENTER01_DS01] TCB0945/TFGH0001-000001.vmdk","backing_thinprovisioned":false,"backing_type":"FlatVer2","backing_uuid":"6000C294-d22d-06a9-c89b-119e13fffe33","backing_writethrough":false,"capacity_in_bytes":32212254720,"capacity_in_kb":31457280,"controller_key":1000,"key":2000,"label":"Hard disk 1","summary":"31,457,280 KB","unit_number":0,"1":"backing_datastore":"VCENTER01_DS01","backing_eagerlyscrub":false,"backing_filename":"[VCENTER01_DS01] TFGH0001/TFGH0001_3.vmdk","backing_thinprovisioned":false,"backing_type":"FlatVer2","backing_uuid":"6000C293-ae37-30f6-b684-d5b2416ff2f8","backing_writethrough":false,"capacity_in_bytes":10737418240,"capacity_in_kb":10485760,"controller_key":1000,"key":2001,"label":"Hard disk 2","summary":"10,485,760 KB","unit_number":1
tasks:
- name: Create a list holding all the info we need for each existing controller
vars:
scsi_controller_devices_query: >-
[?to_string(value.controller_key)==' controller_key '].value.unit_number[]
scsi_controller_devices: >-
vm_disk_info.guest_disk_facts |
dict2items |
json_query(scsi_controller_devices_query)
# Construct object directly as json so that we retain int type for further comparison usage.
current_controller: >-
"controller_number": controller_number | int ,
"controller_key": controller_key | int ,
"number_of_devices": scsi_controller_devices | length | int ,
"max_unit_number": scsi_controller_devices | max | int ,
set_fact:
scsi_controllers_info: " scsi_controllers_info | default([]) + [current_controller] "
loop: " scsi_controller_unique_keys "
loop_control:
loop_var: controller_key
index_var: controller_number
- block:
# Note: This was already sorted when we got controllers list in our first loop
- name: "Extract first controller having less than scsi_max_devices disks"
set_fact:
scsi_controller: >-
(
scsi_controllers_info |
selectattr('number_of_devices', '<', scsi_max_devices) |
list
).0
rescue:
- name: Fail if we cannot add an other controller id
# i.e.controllernumber of our last element in list is equal (or greater for tests) that scsi_max_controller_id
fail:
msg: All scsi controllers are full, disk cannot be added.
when: scsi_controllers_info[-1].controller_number >= scsi_max_controller_id
- name: Return an empty controller with incremented id
set_fact:
scsi_controller: >-
"controller_number": scsi_controllers_info[-1].controller_number + 1 | int ,
"controller_key": scsi_controllers_info[-1].controller_key + 1 | int ,
"number_of_devices": 0,
"max_unit_number": -1,
- name: Show what the call to vmware_guest_disk would look like
vars:
vmware_guest_disk_params:
hostname: " vcenter_host "
username: " vcenter_username "
password: " vcenter_password "
validate_certs: False
datacenter: " vcenter_host "
name: " target_host "
disk:
- size_gb: 2
type: thin
state: present
datastore: " host_datastore "
# autoselect_datastore: True
scsi_controller: " scsi_controller.controller_number "
unit_number: " scsi_controller.max_unit_number + 1 "
scsi_type: 'paravirtual'
debug:
msg: " vmware_guest_disk_params "
【讨论】：
如你所说，我的playbook确实有一个bug，就是如果unit_number的个数增加了，但是没有达到7，那么就会报错，但是我不能暂时想一个更好的解决方案。 非常感谢您的指导和建议。我以为我无法处理剧本中的太多消息。再次感谢您为我的学习指明方向。以上是关于如何使用 Ansible 官方模块更高效地向 VMware VM 主机添加磁盘？的主要内容，如果未能解决你的问题，请参考以下文章