Loops

Question 1

Como se crea un looop en playbook para crear usuarios

Answer 1

—- 
- name: Create users
   hosts: servera.lab.example.com
   vars: 
        myusers: 
           - fred
           - barney 
           - wilma 
           - betty 
   tasks:
         - name: Create users 
            user: 
                name: “{{ item }}”
            state: present
            loop: “{{ myusers }}”
...

Question 2

Crear grupos con usuarios playbook

Método with_dict: loop

Answer 2

—-

• name: create users in the appropriate groups
  hosts: all
  tasks:

   - name: create groups
      group: 
          name: “{{ item }}”
      loop:
          - flintstones 
          - rubbles
  
    - name: create users in their groups
       user: 
            name: “{{ item.name }}”
            groups: “{{ item.groups }}”
       with_dict: 
             - { name: ‘fred’, groups: ‘flintstones’ }
             - { name: ‘wilma’, groups: ‘flintstones’ }
             - { name: ‘barney’, groups: ‘rubbles’ }
             - { name: ‘betty’, groups: ‘rubbles’ } ...

Question 3

Como buscar ayuda de un módulo

Answer 3

ansible-doc -t lookup

Question 4

Como se agregan variables se ansible vault y como se usa en playbook

Answer 4

• name: include passwords from vault
  include_vars:
  file: passwords.yml

Question 5

Como se usa un nested loop

Answer 5

- name: give Beatles access to their dbs
   mysql_user:
       name: “{{ item[0] }}”
       priv: “{{ item[1] }}.*:ALL”
       append_privs: yes
       password: “{{ db_pass }}”
   with_nested:
        - “{{ beatles}}”
        - “{{ category_db }}”

Question 6

Como se usa el módulo archive en playbook

Answer 6

• name: create zip
  hosts: localhost
  become: falsevars:
  source: /file
  zipfile: /file.tar.gz
  zipformat: ziptasks:

    - name: create tar 
      archive:  
         format: “{{ zipformat }}”
         path: “{{ source }}”
         dest: “{{ zipfile }}”
  
     - name: check if tar exists
        stat:
            path: “{{ zipfile }}”
        register: archive
  
      - name: show the archive dictionary
         debug:  
              var: archive

Question 7

Como se usa una condicion en un loop

Answer 7

• name: name of the play
  hosts: all
  vars:
  my_service: httpdtasks:

   - name: “{{ mr_service }} package is installed”
      yum:  
            name: “{{ my_service }}”
      when: my_service is defined

Question 8

Condicionales para where sintaxis

Answer 8

Var == “variable”
Var == 99
Var < 99
Var > 99
Var <= 99
Var >= 99
Var != 99
Var is defined
Var is not defined 
Var ( true / false )
Var in Var2

Question 9

Ejemplo de condición si ansible_distribution está dentro de supported_distros

Answer 9

—-
- name: demonstrate in keyword
   hosts: all
   gather_facts: yes
   vars:
        supported_distros:
           - RedHat
           - Fedora
   tasks:
       - name: install httpd using yum
          yum: 
              name: http
              state: present
          when: ansible_distribution in supported_distros

Question 10

Ejemplo de multiple or y and conditions

Answer 10

when: ansible_distribution == “RedHat” or ansible_distribution == “Fedora”
when: ansible_distribution_version == “7.5” and ansible_kernel == “3.10.0-327.el7.x86_64”

Question 11

Como se coloca una condición larga en una sola linea

Answer 11

when: >
( ansible_distribution == “RedHat” and ansible_distribution_major_version == “7” )
or
( ansible_distribution == “Fedora” and ansible_distribution_major_version == “28” )

Question 12

Como se realiza una validación. Previa de los filesystem para evaluar que haya Espacio disponible antes de instalar un paquete

Answer 12

—-

_ name:

Question 13

Lo mi se usa el

Módulo copy para copiar un archivo

Answer 13

• name: Indtall the sudo configuration
  copy:
  src: support.sudo
  dest: /etc/sudoers.d/support

Question 14

Como se usa el módulo authorized key de ssh

Answer 14

- name: install the ssh key 
   authorized_key: 
       manage_dir: yes
       user: support 
       key: “{{ lookup(‘file’ , ’id_rsa.pub’) }}”

Question 15

Como se usa el módulo lineinfile

Answer 15

• name:
  lineinfile:
  state: present
  dest: /etc/ssh/ssh_config
  line: AllowGroups wheel
  notify: Restart the ssh daemon

Question 16

Como se usa el parámetro notify de playbook para tareas

Answer 16

Se usa para notificar o lanzar tareas posteriores de otros módulos, solo
Ejecutan si la tarea resulta en change state

tasks:

   - name: Disallow password authentication
      lineinfile:
         state: present
         dest: /etc/ssh/ssh_config
         line: PasswordAuthentication no
         notify: Restart the ssh daemon
handlers:
    - name: Restart the ssh daemon
       service: 
          name: sshd
          state: restarted

Question 17

Como se forza a qué se ejecute un handler

Answer 17

Parámetro
- name: play level
force_handlers: true

Question 18

Como registras un shellscript como fallido con el shell module

Answer 18

tasks:
- name: run user creation script
shell: /usr/local/bien/create_users.sh
register: command_result
Failed_when: “‘Password missing’ in command_result.stdout”

Question 19

Como se usa el fail module

Answer 19

tasks:
- name: run user creation script
shell: /usr/local/bien/create_users.sh
register: command_result
ignore_errors: yes
- name: report script failure
fail:
msg: “the password is missing in the output”
when: “‘Password missing’ in the command_result.stdout”

Question 20

Como se reporta como changed en shell module ejemplo

Answer 20

• name: get Kerberos credentials as admin
  shell: echo “{{ krb_admin_pass }}” | kinit -f admin
  changed_when: false

Question 21

Como

Se logra especificar un ejemplo de colocar cuando esté en estado changed

Answer 21

tasks:
- shell:
cmd: /usr/local/bin/upgrade-database
register: command_result
changed_when: “‘Success’ in command_result.stdout”
notify:
- restart_database

handlers:
- name: restart_database
service:
name: mariadb
state: restarted

Question 22

Como se utilizan los. Bloques mostrar ejemplo en playbook

Answer 22

• name: block example
  hosts: all
  tasks:
  - name: installing and configuring yum
  block:
  - name: package need it
  yum:
  name: yum-plugin-versionlock
  state: present
  - name: lock version of tzdata
  lineinfile: tzdata-2016j-1
  state: present
  when: ansible_distribution == “RedHat”

Question 23

Como funciona rescue y always en un bloque playbook

Answer 23

• name: upgrade database
  block:
  - name: upgrade database
  shell:
  cmd: /usr/local/bin/upgrade-database
  rescue:
  - name: revert upgrade
  shell:
  cmd: /usr/local/bin/revert-database
  always:
  - name: always restart database
  service:
  name: mariadb
  state: restarted

Question 24

Como se usa ignore errors en un playbook

Answer 24

task:
- name: install {{ web_package }} package
yum:
name: “{{ web_package }}”
state: present
ignore_errors: yes
…

Question 25

Que parámetro se usa en los módulos de comando o shell para indicar que no cambio nada

Answer 25

changed_when: false El estado default es changed

Question 26

Como sobre escribimos una tarea para indicar que fallo con una condición

Answer 26

failed_when: web_package == “httpd”