EX294 Red Hat Certified Engineer (RHCE) exam for Red Hat Enterprise Linux 8 Questions and Answers

Solution as:

# pwd

/home/admin/ansible

# vim modify.yml

---

- name:

hosts: all

tasks:

- name:

copy:

content: "Development"

dest: /etc/issue

when: inventory_hostname in groups['dev']

- name:

copy:

content: "Test"

dest: /etc/issue

when: inventory_hostname in groups['test']

- name:

copy:

content: "Production"

dest: /etc/issue

when: inventory_hostname in groups['prod']

wq

# ansible-playbook modify.yml –-syntax-check

# ansible-playbook modify.yml

Solution as:

----------

# pwd

/home/admin/ansible/roles/

# ansible-galaxy init apache

# vim apache/vars/main.yml

---

# vars file for apache

http_pkg: httpd

firewall_pkg: firewalld

http_srv: httpd

firewall_srv: firewalld

rule: http

webpage: /var/www/html/index.html

template: index.html.j2

wq!

# vim apache/tasks/package.yml

---

- name: Installing packages

yum:

name:

- "{{http_pkg}}"

- "{{firewall_pkg}}"

state: latest

wq!

# vim apache/tasks/service.yml

---

- name: start and enable http service

service:

name: "{{http_srv}}"

enabled: true

state: started

- name: start and enable firewall service

service:

name: "{{firewall_srv}}"

enabled: true

state: started

wq!

# vim apache/tasks/firewall.yml

---

- name: Adding http service to firewall

firewalld:

service: "{{rule}}"

state: enabled

permanent: true

immediate: true

wq!

# vim apache/tasks/webpage.yml

---

- name: creating template file

template:

src: "{{template}}"

dest: "{{webpage}}"

notify: restart_httpd

!wq

# vim apache/tasks/main.yml

# tasks file for apache

- import_tasks: package.yml

- import_tasks: service.yml

- import_tasks: firewall.yml

- import_tasks: webpage.yml

wq!

# vim apache/templates/index.html.j2

Welcome to {{ ansible_facts.fqdn }} on {{ ansible_facts.default_ipv4.address }}

# vim apache/handlers/main.yml

---

# handlers file for apache

- name: restart_httpd

service:

name: httpd

state: restarted

wq!

# cd ..

# pwd

/home/admin/ansible/

# vim httpd.yml

---

- name: Including apache role

hosts: webservers

pre_tasks:

- name: pretask message

debug:

msg: 'Ensure webserver configuration'

roles:

- ./roles/apache

post_tasks:

- name: Check webserver

uri:

url: "http://{{ ansible_facts.default_ipv4.address }} "

return_content: yes

status_code: 200

wq!

# ansible-playbook httpd.yml –-syntax-check

# ansible-playbook httpd.yml

# curl http://serverx

Solution as:

# pwd

/home/admin/ansible

# wget http://classroom.example.com/hosts.j2

# vim hosts.j2

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1

localhost localhost.localdomain localhost6 localhost6.localdomain6

{% for host in groups['all'] %}

{{ hostvars[host]['ansible_facts']['default_ipv4']['address'] }} {{ hostvars[host]

['ansible_facts']['fqdn'] }} {{ hostvars[host]['ansible_facts']['hostname'] }}

{% endfor %}

wq!

# vim gen_hosts.yml

---

- name: collecting all host information

hosts: all

tasks:

- name:

template:

src: hosts.j2

dest: /etc/myhosts

when: inventory_hostname in groups['dev']

wq

# ansible-playbook gen_hosts.yml -–syntax-check

# ansible-playbook gen_hosts.yml

Solution as:

# pwd

home/admin/ansible/

# sudo yum install rhel-system-roles.noarch -y

# cd roles/

# ansible-galaxy list

# cp -r /usr/share/ansible/roles/rhelsystem-roles.timesync .

# vim timesync.yml

---

- name: timesynchronization

hosts: all

vars:

timesync_ntp_provider: chrony

timesync_ntp_servers:

- hostname: classroom.example.com _ in exam its ip-address

iburst: yes

timezone: Asia/Kolkata

roles:

- rhel-system-roles.timesync

tasks:

- name: set timezone

timezone:

name: "{{ timezone }}"

wq!

timedatectl list-timezones | grep india

# ansible-playbook timesync.yml --syntax-check

# ansible-playbook timesync.yml

# ansible all -m shell -a 'chronyc sources -v'

# ansible all -m shell -a 'timedatectl'

# ansible all -m shell -a 'systemctl is-enabled chronyd'

Solution as:

# pwd

/home/admin/ansible

# vim lvm.yml

---

- name:

hosts: all

ignore_errors: yes

tasks:

- name:

lvol:

lv: data

vg: research

size: "1500"

- debug:

msg: "VG Not found"

when: ansible_lvm.vgs.research is not defined

- debug:

msg: "LV Can not be created with following size"

when: ansible_lvm.vgs.research.size_g < "1.5"

- name:

lvol:

lv: data

vg: research

size: "800"

when: ansible_lvm.vgs.research.size_g < "1.5"

- name:

filesystem:

fstype: ext4

dev: /dev/research/data

wq!

# ansible-playbook lvm.yml –-syntax-check

# ansible-playbook lvm.yml

/home/sandy/ansible/apache.yml

/home/sandy/ansible/roles/sample-apache/tasks/main.yml

/home/sandy/ansible/roles/sample-apache/templates/index.html.j2

In /home/sandy/ansible/roles/sample-apache/handlers/main.yml

in /home/sandy/ansible/roles

vim requirements.yml

Run the requirements file from the roles directory:

ansible-galaxy install -r requirements.yml -p /home/sandy/ansible/roles