ansible dynamic inventory script for Nutanix Prism

ahv_inventory.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys
import json
import requests

# args = sys.argv
# conf_file = args[1]
conf_file = "/home/gowatana/prism-config.json"

def get_all_vm_inventory():
  with open(conf_file, "r") as file:
    conf = file.read()
    conf = json.loads(conf)
  prism_addr = conf["prism_address"]
  prism_user = conf["user_name"]
  prism_pass = conf["password"]

  base_url = 'https://' + prism_addr + ':9440/PrismGateway/services/rest/v2.0/'
  insecure_warn = requests.packages.urllib3.exceptions.InsecureRequestWarning
  requests.packages.urllib3.disable_warnings(insecure_warn)
  s = requests.Session()
  s.auth = (prism_user, prism_pass)
  s.headers.update({'Content-Type': 'application/json; charset=utf-8'})

  # Get VM.
  url = base_url + 'vms/?include_vm_nic_config=true'
  vms = s.get(url, verify=False).json()

  inventory = {
    "all":{"hosts": []},
    "poweron_vms":{"hosts": []},
    "poweroff_vms":{"hosts": []},
    "_meta": {
      "hostvars": {}
    }
  }
  vm_entities = []
  hosts = {}
  for vm in vms['entities']:
    #print(json.dumps(vm, indent=2))
    vm_name = vm['name']
    power_state = vm['power_state']
    if(vm['power_state'] == 'on'):
      inventory["poweron_vms"]["hosts"].append(vm_name)
    else:
      inventory["poweroff_vms"]["hosts"].append(vm_name)
    inventory["all"]["hosts"].append(vm_name)
    if(vm['vm_nics']):
      vm_nic = vm['vm_nics'][0]
      ip_address = vm_nic.get('ip_address')
      requested_ip_address = vm_nic.get('requested_ip_address')
      if (ip_address == None):
        ip_address = vm_nic.get('requested_ip_address')
      if ip_address:
        inventory["_meta"]["hostvars"][vm_name] = {"ansible_host": ip_address, "power_state": power_state}
      else:
        inventory["_meta"]["hostvars"][vm_name] = {}
  return(inventory)

if __name__ == '__main__':
  hostname = None
  inventory = get_all_vm_inventory()

  if len(sys.argv) > 1:
    if sys.argv[1] == "--host":
      hostname = sys.argv[2]

  if hostname:
    if inventory["_meta"]["hostvars"][hostname]:
      print(json.dumps(inventory["_meta"]["hostvars"][hostname]))
  else:
    print(json.dumps(inventory))

何かエラーが出る。

$ ansible all -i ./ahv_inventory.py --list-hosts
 [ERROR]:

  hosts (3):
    vm03
    vm02
    vm01

設定の補足。下記も必要。

$ chmod +x ahv_inventory.py
$ pip install requests

参考
https://docs.ansible.com/ansible/latest/dev_guide/developing_inventory.html

下記の Python / Ansible では普通に使えた。

環境

$ python -V
Python 3.6.8
$ ansible --version
ansible 2.10.8
  config file = /home/gowatana/demo-nutanix-ansible/05_inventory/ansible.cfg
  configured module search path = ['/home/gowatana/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /home/gowatana/ansible/lib/python3.6/site-packages/ansible
  executable location = /home/gowatana/ansible/bin/ansible
  python version = 3.6.8 (default, Nov  5 2020, 18:03:20) [GCC 8.3.1 20191121 (Red Hat 8.3.1-5.0.1)]

実行した様子。

$ ansible all --list-hosts
  hosts (4):
    ol83-min-01
    vm01
    test-vm-clone-01
    demo-ansible-01
$ ansible-inventory --host test-vm-clone-01
{
    "ansible_host": "192.168.11.134"
}

I am surprised to see from your output 2 things

1. Red Hat 8.3.1-5.0.1
   2)ansible 2.10.8
   How was that possible do we have 2.10 for RHEL8 ?
   Could you please help me how to update ansible2.9 to 2.10 on EL8
   Much Appreciated

$ python -V
Python 3.6.8
$ ansible --version
ansible 2.10.8
config file = /home/gowatana/demo-nutanix-ansible/05_inventory/ansible.cfg
configured module search path = ['/home/gowatana/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
ansible python module location = /home/gowatana/ansible/lib/python3.6/site-packages/ansible
executable location = /home/gowatana/ansible/bin/ansible
python version = 3.6.8 (default, Nov 5 2020, 18:03:20) [GCC 8.3.1 20191121 (Red Hat 8.3.1-5.0.1)]

Nutanix Dynamic Inventory Worked charm
Could you please help update this script so that i can only import VMs which are power-on only
i dont want to import power-off vms

Much Appreciated

The Script worked. Thank you.
Can you please help me to filter only power-on machines. How to apply the filters using ansible-playbook.
Using hosts as all is providing all the machines in nutanix environment. This is sample playbook example

---

• name: Check whether realm installed or not
  hosts: all
  become: yes
  become_user: root
  tasks:
  • name: Run the command to check realm installed or not
    shell:
    "/usr/sbin/realm list|grep -i permitted"
    register: result

Command executed is
#ansible-playbook -i nutanix_inventory.py realminstalledORnot.yml

Please help on this.

Thank you. Appreciate your help.

PowerOn / PowerOff の VM をグループ化できるようにしてみた。

$ ansible-inventory -i ./ahv_inventory.py --graph
@all:
  |--@poweroff_vms:
  |  |--dev-vm-01
  |  |--lab-oracle-01
  |  |--ol87-base-01
  |--@poweron_vms:
  |  |--demo-ansible-01
  |  |--demo-ansible-02
  |  |--lab-ndb-01
  |  |--ndb-oracle-01
  |--@ungrouped:
$ ansible -i ./ahv_inventory.py --list-hosts poweron_vms
  hosts (4):
    lab-ndb-01
    demo-ansible-02
    ndb-oracle-01
    demo-ansible-01
$ansible-inventory -i ./ahv_inventory.py --host ndb-oracle-01
{
    "ansible_host": "192.168.11.125",
    "power_state": "on"
}
$ ansible-inventory -i ./ahv_inventory.py --host dev-vm-01
{
    "ansible_host": "192.168.11.146",
    "power_state": "off"
}

実行例はこちら。

Nutanix から仮想マシンを取得する Ansible Dynamic Inventory を作成してみる。（REST API v2）
https://blog.ntnx.jp/entry/2023/05/07/150924