ALBERT SITE

팩트는 앤서블 관리 호스트에서 자동으로 검색한 변수 리스트

1. web 호스트서버의 전체팩트 정보 수집하는 플레이북 생성 및 확인

- hosts: web
  tasks:
  - name: Print facts info
    ansible.builtin.debug:
      var: ansible_facts

실행(web 서버의 전체 팩트내용을 확인할수있는 json 값들 확인할수있다.)

[root@asimblecontroller asimble]' ansible-playbook facts.yml

PLAY [web] ********************************************************************                                               *

TASK [Gathering Facts] ********************************************************                                               *
ok: [tnode1]

TASK [Print facts info] *******************************************************                                               *
ok: [tnode1] => {
    "ansible_facts": {
        "all_ipv4_addresses": [
            "192.168.200.154",
            "192.168.122.1"
        ],
        "all_ipv6_addresses": [
        "fe80::b0f3:82f6:e834:a726"
        ],
        "ansible_local": {},
        "apparmor": {
            "status": "disabled"
        },
        "architecture": "x86_64",
        "bios_date": "12/01/2006",
        "bios_version": "VirtualBox",
        "cmdline": {
            "BOOT_IMAGE": "/vmlinuz-3.10.0-1160.119.1.el7.x86_64",
            "LANG": "ko_KR.UTF-8",
            "crashkernel": "auto",
            "quiet": true,
            "rd.lvm.lv": "centos/swap",
            "rhgb": true,
            "ro": true,
            "root": "/dev/mapper/centos-root"
        },
        ......
        "virtualization_role": "guest",
        "virtualization_type": "virtualbox"
    }
}
PLAY RECAP ********************************************************************                                               *
tnode1                     : ok=2    changed=0    unreachable=0    failed=0                                                   skipped=0    rescued=0    ignored=0

2. fact의 특정항목 출력하는 플레이북 생성

[root@asimblecontroller asimble]' vi facts1.yml

- hosts: web
  tasks:
  - name: Print facts info
    ansible.builtin.debug:
      msg: >
        The default IPv4 address of {{ ansible_facts.fqdn }}
        is {{ ansible_facts.default_ipv4.address }}
        And kernel is {{ ansible_kernel }}

해당 플레이북 실행시 web서버 host 명, ipv4 주소정보 및 kernel 정보를 출력하는부분 확인할수 있다.

[root@asimblecontroller asimble]' ansible-playbook facts1.yml

PLAY [web] *********************************************************************

TASK [Gathering Facts] *********************************************************
ok: [tnode1]

TASK [Print facts info] ********************************************************
ok: [tnode1] => {
"msg": "The default IPv4 address of tnode1 is 192.168.200.154 And kernel is 3.10.0-1160.119.1.el7.x86_64\n"
}

PLAY RECAP *********************************************************************
tnode1                     : ok=2    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

자주사용되는 앤서블 팩트 정보

팩트의 간략한 네임스페이스 표기법 (ansible_facts. -> ansible_로 대체)

facts 비활성화 

[root@asimblecontroller asimble]' vi ansible.cfg

[defaults]
inventory = ./inventory
remote_user = root
ask_pass = false
inject_facts_as_vars = false

[privilege_escalation]
become = true
become_method = sudo
become_user = root
become_ask_pass = false

플레이북 내부에서 강제 facts 비활성화

[root@asimblecontroller asimble]' vi facts2.yml

- hosts: web
  gather_facts: no
  tasks:
  - name: Print facts info
    ansible.builtin.debug:
      msg: >
        The default IPv4 address of {{ ansible_facts.fqdn }}
        is {{ ansible_facts.default_ipv4.address }}
        And kernel is {{ ansible_kernel }}

매뉴얼한 방법으로 팩트수집

- hosts: web
  gather_facts: no

  tasks:
  - name: Manually gather facts
    ansible.builtin.setup:

  - name: Print all facts
    ansible.builtin.debug:
      msg: >
        The default IPv4 address of {{ ansible_facts.fqdn }}
        is {{ ansible_facts.default_ipv4.address }}
        And kernel is {{ ansible_kernel }}

사용자 커스텀 팩트만들기

앤서블은 /etc/ansible/facts.d 폴더상 .fact 파일의 내용을 자동으로 팩트수집처리한다. 

우선 /etc/ansible/facts.d 폴더 생성후 custom.fact 파일생성한다

[root@asimblecontroller asimble]' mkdir /etc/ansible/facts.d
[root@asimblecontroller facts.d]' vi /etc/ansible/facts.d/custom.fact
        
[webPackages]
lang = java
ui = vue
framework = springboot

[dbUsers]
user1 = albert
user2 = kara

커스텀 팩트확인 플레이북 생성

[root@asimblecontroller asimble]' vi facts5.yml
- hosts: localhost

  tasks:
  - name: Show all localhost custom facts 
    ansible.builtin.debug:
      var: ansible_local

플레이북 실행 및 결과 확인

[root@asimblecontroller asimble]' ansible-playbook facts5.yml

PLAY [localhost] ***************************************************************

TASK [Gathering Facts] *********************************************************
ok: [localhost]

TASK [Show all localhost custom facts] *****************************************
ok: [localhost] => {
    "ansible_local": {
        "custom": {
            "dbUsers": {
                "user1": "albert",
                "user2": "kara"
            },
            "webPackages": {
                "framework": "springboot",
                "lang": "java",
                "ui": "vue"
            }
        }
    }
}

PLAY RECAP *********************************************************************
localhost                  : ok=2    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

끝