Second LIfe

- hosts: localhost
  gather_facts: true
  tasks:
    - debug:
        msg: Disk nvme0n1 exists.
      when: "'nvme0n1' in ansible_devices.keys()|list"
    - debug:
        msg: Disk sdb does not exist.
      when: "'sdb' not in ansible_devices.keys()|list"

https://docs.ansible.com/ansible/latest/playbook_guide/playbooks_conditionals.html

```bash
root@DESKTOP-F4T7TCG:/home/ansible# more disk.yml
---
- name: test disk information check
  hosts: vm
  tasks:
  - name: disk check
    debug:
      msg: "{{ ansible_facts['devices'] }}"
  - name: check True or not
    debug:
      msg: Disk sdb doest not exist
    when: "'sdb' not in ansible_devices.keys()|list"
  - name: check disk not
    copy:
      content: "{{ ansible_facts['devices']['sdb']['size'] }}"
      dest: "/home/{{ansible_fqdn}}-diskinfo.txt"
    delegate_to: localhost
    when: "'sdb' in ansible_devices.keys()| list"

```

============

  - name: chel
    shell: |
            echo "
            node_kernel_size(name='{{ ansible_hostname }}')  '{{ ansible_kernel }}'
            node_disk_size(name='{{ ansible_hostname }}')  '{{ ansible_facts.devices.sdb.size }}'
            " >> /home/ansible/info.txt
#      dest: "/home/ansible/{{ansible_fqdn}}-info.txt"
#    delegate_to: localhost
    when: "'sdb' in ansible_devices.keys()| list"

=========== prom으로 사용할려면 ========= \"를 앞뒤 추가해줘야한다

systemctl restart node_exporter
journalctl -eu node_exporter

workshop_student_is_happy{campus="campusX"} 1

curl localhost:9100/metrics
curl -s localhost:9100/metrics | grep workshop

  - name: chel
    shell: |
            echo "
            node_kernel_size{name=\""{{ ansible_hostname }}"\",output=\""{{ ansible_kernel }}"\"} 0
            node_disk_size{name=\""{{ ansible_hostname }}"\",size=\""{{ ansible_facts.devices.sdb.size }}"\"} 0
            " >> /home/ansible/info.txt
#      dest: "/home/ansible/{{ansible_fqdn}}-info.txt"
#    delegate_to: localhost
    when: "'sdb' in ansible_devices.keys()| list"

==============================================================

----
- name: test disk information check
  hosts: vm
  tasks:
  - name: disk check if yes
    shell: |
         echo "
         node_kernel_size{name=\""{{ ansible_hostname }}"\",output=\""{{ ansible_kernel }}"\",disk=\""{{ ansible_facts.devices.sdb.size}} "\"} 0
         " > /home/ansible/info.txt
#      dest: "/home/ansible/{{ansible_fqdn}}-info.txt"
#    delegate_to: localhost
    when: "'sdb' in ansible_devices.keys()| list"

  - name: disk check if no
    shell: |
         echo "
         node_kernel_size{name=\""{{ ansible_hostname }}"\",output=\""{{ ansible_kernel }}"\",disk=\""0"\"} 0
         " > /home/ansible/info.txt
#      dest: "/home/ansible/{{ansible_fqdn}}-info.txt"
#    delegate_to: localhost
    when: "'sdcxb' not in ansible_devices.keys()| list"                 

https://dywang.csie.cyut.edu.tw/dywang/ansible/node132.html                                                                    

nc 명령어를 사용하여 서버에 임시 포트 오픈 및 확인을 할 수 있다.



서버 1은 임시로 포트를 open

서버 2는 서버1의 오픈된 포트로 접근시도



* 서버1 192.168.10.10

$ nc -lk [port]

예: nc -lk 8080



* 서버2 192.168.20.10

$ nc -v [서버1 IP] [port]

예: nc -v 192.168.10.10 8080

ssl로 실제 fetch_openml로 mnist를 다운받지 못하는 상태에서..

from sklearn.datasets import fetch_openml
mnist = fetch_openml('mnist_784',version=1,data_home='./dataset', as_frame=False)

압축파일을 jupyter위체 풀고 다시 한번 해보자..될련가?

ㅋㅋ 된다 된다

우선 현재 작업 중인 경로를 확인

import os
print(os.getcwd())

압축파일 다은로드후 현재 작업공간에 업로그
이제 압축을 풀어준다

파일경로는 본인 경로에 맞게 수정

import zipfile
with zipfile.ZipFile(‘/home/jovyan/study/daraset.zip’, ‘r’) as zip_ref
zip_ref.extractall(‘/home/jovyan/study/‘)


이제 불러 맨 위 import mnist진행하면돰