RedHat Red Hat Certified Engineer (RHCE) exam for Red Hat Enterprise Linux 8

QUESTION NO: 1
Create a playbook called hwreport.yml that produces an output file called /root/
hwreport.txt on all managed nodes with the following information:
------------------------------------------------------------------------------------------------------
--> Inventory host name
--> Total memory in MB
--> BIOS version
--> Size of disk device vda
--> Size of disk device vdb
Each line of the output file contains a single key-value pair.
* Your playbook should:
--> Download the file hwreport.empty from the URL http://classroom.example.com/
hwreport.empty and
save it as /root/hwreport.txt
--> Modify with the correct values.
note: If a hardware item does not exist, the associated value should be set to NONE
----------------------------------------------------------------------------------------------
while practising you to create these file hear. But in exam have to download as per
questation.
hwreport.txt file consists.
my_sys=hostname
my_BIOS=biosversion
my_MEMORY=memory
my_vda=vdasize
my_vdb=vdbsize

Discussion 0

Correct Answer:

Solution as:
# pwd
/home/admin/ansible
# vim hwreport.yml
- name:
hosts: all
ignore_errors: yes
tasks:
- name: download file
get_url:
url: http://classroom.example.com/content/ex407/hwreport.empty
dest: /root/hwreport.txt
- name: vdasize
replace:
regexp: "vdasize"
replace: "{{ ansible_facts.devices.vda.size }}"
dest: /root/hwreport.txt
register: op1
- debug:
var: op1
- name: none
replace:
regexp: "vdasize"
replace: NONE
dest: /root/hwreport.txt
when:
op1.failed == true
- name: vdbsize
replace:
regexp: "vdbsize"
replace: "{{ ansible_facts.devices.vdb.size }}"
dest: /root/hwreport.txt
register: op2
- debug:
var: op2
- name: none
replace:
regexp: "vdbsize"
replace: NONE
dest: /root/hwreport.txt
when:
op2.failed == true
- name: sysinfo
replace:
regexp: "{{item.src}}"
replace: "{{item.dest}}"
dest: /root/hwreport.txt
loop:
- src: "hostname"
dest: "{{ ansible_facts.fqdn }}"
- src: "biosversion"
dest: "{{ ansible_facts.bios_version }}"
- src: "memory"
dest: "{{ ansible_facts.memtotal_mb }}"
:wq!
# ansible-playbook hwreport.yml --syntax-check
# ansible-playbook hwreport.yml

QUESTION NO: 2
Generate a hosts file:
* Download an initial template file hosts.j2 from http://classroom.example.com/
hosts.j2 to
/home/admin/ansible/ Complete the template so that it can be used to generate a file with a line for each inventory host in the same format as /etc/hosts:
172.25.250.9 workstation.lab.example.com workstation
* Create a playbook called gen_hosts.yml that uses this template to generate the file /etc/myhosts on hosts in the dev host group.
* When completed, the file /etc/myhosts on hosts in the dev host group should have a line for each managed host:
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
172.25.250.10 serevra.lab.example.com servera
172.25.250.11 serevrb.lab.example.com serverb
172.25.250.12 serevrc.lab.example.com serverc
172.25.250.13 serevrd.lab.example.com serverd
-----------------------------------------------------------------
while practising you to create these file hear. But in exam have to download as per questation.
hosts.j2 file consists.
localhost localhost.localdomain localhost4 localhost4.localdomain4
::1
localhost localhost.localdomain localhost6 localhost6.localdomain6
-------------------------------------------------------------------

Discussion 0

Correct Answer:

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

QUESTION NO: 3
Install the RHEL system roles package and create a playbook called timesync.yml that:
--> Runs over all managed hosts.
--> Uses the timesync role.
--> Configures the role to use the time server 192.168.10.254 ( Hear in redhat lab
use "classroom.example.com" )
--> Configures the role to set the iburst parameter as enabled.

Discussion 0

Correct Answer:

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'

QUESTION NO: 4
Create a role called sample-apache in /home/sandy/ansible/roles that enables and starts httpd, enables and starts the firewall and allows the webserver service. Create a template called index.html.j2 which creates and serves a message from /var/www/html/index.html Whenever the content of the file changes, restart the webserver service.
Welcome to [FQDN] on [IP]
Replace the FQDN with the fully qualified domain name and IP with the ip address of the node using ansible facts. Lastly, create a playbook in /home/sandy/ansible/ called apache.yml and use the role to serve the index file on webserver hosts.

Discussion 0

Correct Answer:

/home/sandy/ansible/apache.yml