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Question 1

Lab simulation

Simulation

Add a cron schedule to take full backup of /home on every day at 5:30 pm to /dev/st0 device.

A. Answer: See the Explanation for complete Solution below.

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1. vi /var/schedule 30 17 * * * /sbin/dump -0u /dev/st0 /dev/hda7
2. crontab /var/schedule
3. service crond restart

We can add the cron schedule either by specifying the scripts path on /etc/crontab file or by creating on text file on crontab pattern. cron helps to schedule on recurring events. Pattern of cron is: Minute Hour Day of Month Month Day of Week Commands 0-59 0-23 1-31 1-12 0-7 where 0 and 7 mean Sunday.
Note * means every. To execute the command on every two minutes */2.

Question 2

Lab simulation

Simulation

Create a playbook that changes the default target on all nodes to multi-user tarqet. Do this in playbook file called target.yml in /home/sandy/ansible

A. Answer: See the Explanation for complete Solution below.

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- name: change default target
hosts: all
tasks:
- name: change target
file:
src: /usr/lib/systemd/system/multi-user.target dest: /etc/systemd/system/default.target state:
link

Question 3

Lab simulation

Simulation

Create a playbook called issue.yml in /home/sandy/ansible which changes the file /etc/issue on all managed nodes: If host is a member of (lev then write "Development" If host is a member of test then write
"Test" If host is a member of prod then write "Production"

A. Answer: See the Explanation for complete Solution below.

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Solution as:

Question 4

Lab simulation

Simulation

Create a playbook called web.yml as follows:

* The playbook runs on managed nodes in the "dev" host group
* Create the directory /webdev with the following requirements:
--> membership in the apache group
--> regular permissions: owner=r+w+execute, group=r+w+execute, other=r+execute s.p=set group-id
* Symbolically link /var/www/html/webdev to /webdev

* Create the file /webdev/index.html with a single line of text that reads: "Development"
--> it should be available on http://servera.lab.example.com/webdev/index.html

A. Answer: See the Explanation for complete Solution below.

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Solution as:

# pwd
/home/admin/ansible/
# vim web.yml
---
- name:
hosts: dev
tasks:
- name: create group
yum:
name: httpd
state: latest
- name: create group
group:
name: apache
state: present
- name: creating directiory
file:
path: /webdev
state: directory
mode: '2775'
group: apache
- sefcontext:
target: '/webdev/index.html'
setype: httpd_sys_content_t
state: present
- name: Apply new SELinux file context to filesystem command: restorecon -irv
- name: creating symbolic link
file:
src: /webdev

dest: /var/www/html/webdev
state: link
force: yes
- name: creating file
file:
path: /webdev/index.html
sate: touch
- name: Adding content to index.html file
copy:
dest: /webdev/index.html
content: "Development"
- name: add service to the firewall
firewalld:
service: http
permanent: yes
state: enabled
immediate: yes
- name: active http service
service:
name: httpd
state: restarted
enabled: yes

wq
# ansible-playbook web.yml --syntax-check
# ansible-playbook web.yml

Question 5

Lab simulation

Simulation

Create the users in the file usersjist.yml file provided. Do this in a playbook called users.yml located at / home/sandy/ansible. The passwords for these users should be set using the lock.yml file from TASK7.
When running the playbook, the lock.yml file should be unlocked with secret.txt file from TASK 7.

All users with the job of 'developer' should be created on the dev hosts, add them to the group devops, their password should be set using the pw_dev variable. Likewise create users with the job of 'manager' on the proxy host and add the users to the group 'managers', their password should be set using the pw_mgr variable.

A. Answer: See the Explanation for complete Solution below.

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ansible-playbook users.yml -vault-password-file=secret.txt

Question 6

Lab simulation

Simulation

Give Full Permission to owner user and owner group member but no permission to others on /data.

A. Answer: See the Explanation for complete Solution below.

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We can change the permission of file/directory either character symbol method or numeric method.
Permission:
r-Read
w-Write x-Execute Permission Category u- Owner User
g- Owner Group
o- Others
Operators
+ -> Add the Permissions
- ->Remove the Permissions = ->Assign the Permissions Numeric Method:
4 -> Read
2 -> Write
1 -> Execute Total: 7, total for owner user, owner group member and for others: 777
1. chmod u+rwx /data
2. chmod g+rwx /data
3. chmod o-rwx /data or chmod 770 /data 4. Verify the /data: ls -ld /data 5 .You will get drwxrwx---

Question 7

Lab simulation

Simulation

Install and configure ansible

User sandy has been created on your control node with the appropriate permissions already, do not change or modify ssh keys. Install the necessary packages to run ansible on the control node. Configure ansible.cfg to be in folder /home/sandy/ansible/ansible.cfg and configure to access remote machines via the sandy user. All roles should be in the path /home/sandy/ansible/roles. The inventory path should be in /
home/sandy/ansible/invenlory.

You will have access to 5 nodes.

node1.example.com
node2.example.com
node3.example.com
node4.example.com
node5.example.com

Configure these nodes to be in an inventory file where node I is a member of group dev. nodc2 is a member of group test, node3 is a member of group proxy, nodc4 and node 5 are members of group prod.
Also, prod is a member of group webservers.

A. Answer: See the Explanation for complete Solution below.

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In/home/sandy/ansible/ansible.cfg
[defaults] inventory=/home/sandy/ansible/inventory
roles_path=/home/sandy/ansible/roles
remote_user= sandy
host_key_checking=false
[privilegeescalation]
become=true
become_user=root
become_method=sudo
become_ask_pass=false

In /home/sandy/ansible/inventory
[dev]
node 1 .example.com
[test]
node2.example.com
[proxy]
node3 .example.com
[prod]
node4.example.com
node5 .example.com
[webservers:children]
prod

Question 8

Lab simulation

Simulation

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

A. Answer: See the Explanation for complete Solution below.

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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 9

Lab simulation

Simulation

Create an empty encrypted file called myvault.yml in /home/sandy/ansible and set the password to notsafepw. Rekey the password to iwejfj2221.

A. Answer: See the Explanation for complete Solution below.

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ansible-vault create myvault.yml
Create new password: notsafepw Confirm password: notsafepw ansible-vault rekey myvault.yml
Current password: notsafepw New password: iwejfj2221 Confirm password: iwejfj2221

Question 10

Lab simulation

Simulation

Create a file called packages.yml in /home/sandy/ansible to install some packages for the following hosts.
On dev, prod and webservers install packages httpd, mod_ssl, and mariadb. On dev only install the development tools package. Also, on dev host update all the packages to the latest.

A. Answer: See the Explanation for complete Solution below.

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Solution as:

** NOTE 1 a more acceptable answer is likely 'present' since it's not asking to install the latest state: present
** NOTE 2 need to update the development node

- name: update all packages on development node
yum:
name: '*'
state: latest

Question 11

Lab simulation

Simulation

One Logical Volume is created named as myvol under vo volume group and is mounted. The Initial Size of that Logical Volume is 400MB. Make successfully that the size of Logical Volume 200MB without losing any data. The size of logical volume 200MB to 210MB will be acceptable.

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Question 12

Lab simulation

Simulation

There were two systems: system1, main system on which most of the configuration take place system2, some configuration here

SSH configuration.
Configure SSH access on your virtual hosts as follows.
Clients within my22ilt.org should NOT have access to ssh on your systems

A. Answer: See the Explanation for complete Solution below.

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Save and Exit (:wq)
Then run this:

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