Env
- OS Version: CentOS 7.5
- Ansible Version: 2.8.4 with python 2.7.5
- ESXi and VCenter Version: 6.5.2
Purpose
I have already completed my code, but I wondering if there are more better way to add disk to VM host by Ansible offical module.
My Method
The return message from vmware_guest_disk_facts
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
My Playbook
---
- 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'
According to VMware offical document 1 VM host can only have 4 scsi controller and each of them can have 15 devices to attach. So I have to write many condition to prevent it.
The strange thing is that when adding a hard disk from VCenter, it will not trigger the problem that the number of hard disks exceeds 7. However, Ansible's module cannot increase the hard disk when unit_number exceeds 7, and must change another SCSI Controller.
Is there any other better way besides doing this? or something I can refer to and study it?
Thank you for your help and advice!
