Devops dare for it geeks

Aws infrastructure use cases 1: 

  •  How to recover windows and linux  instances key if lost { 2 methods}
  •  If a cloud admin  don't want to share instances private with other team mates 
  • How to upgrade Rhel 7  to rhel 8 in a running  website 
  • Migrate local website to aws cloud  web site having  data base as well
  • Host web site on windows and linux both servers including , .net , php , html and jsp (java)
  • Implement virtual hosting in apache & IIS  server 

Aws infracture  use cases 2:

  •    launch  windows and linux based ec2 instance 
  •   create an EBS device of 2GiB and  attach to windows instances only then store some pdf and text file in that EBS volume 
  •  create an EBS of 2GiBand attache in linux instances then mount it under document root of apache server and host a html based website.
  •  create a snaphost of device of linux and windows both machine



Ansible problem #1

  •   How to check which python version used by ansible 
  •   check python version used by ansible and store output in a file
  •   name to module of ansible you used for checking 
  •   How to change ansible default inventory file location
  •   how to list all the host available using ansible command line

Ansible  playbooks #2 

write ansible playbook to automate following  things under a single play

  •  write playbook to  install httpd web server on remote host 
  •   remote user is  devops 
  •   local user is  student 
  •   run playbook from /home/student/playbook
  •   make sure  you are not using default ansible configuration file 
  •   copy a file  abc.html  to target machine by the name index.html 
  •   owner of index.html must be apache 
  •   abc.html is located at  /home/student/playbook/files/
  •   start httpd service and make sure it is persistent 
  •   start firewalld service and make sure it is persistent 
  •   maintain firewall rule in that way so that we can access web page  

Note :    you can setup all required things first manually  then write playbook


Ansible playbook #3 

  • repeat the same playbook in multiple play
  • make sure each task must have its different play


Ansible  playbook  #4 

write a playbook to perform things given below

  •   define 3 variable inside your playbook under vars section  
  •   x:  httpd ,  y:  firewalld ,  z:  php 
  •   install all these package in remote host 
  •   make sure  you have local user student and remote user devops 
  •   start all required services on remote host 
  •   copy any dummy page to /var/www/html 
  •   page must be index.php  
  •   apply firewall rules to access that php page  
 
  
 Problem #5 

  •   create a shell script  under  /home/student/ name auto.sh
  •   that will configure yum repository named  auto.repo
  •   baseurl  you can take   http://mirror.centos.org/centos-7/7/os/x86_64/
  •   it must not enable rpm verification 
  •   owner and group will be student 
  •   it must install a package  ntp and screen
  •   also it will check ram and cpu in each node  store in a file /root/health.txt    on each node 
  •   it will also install  a python module numpy  using pip ansible module  
Problem #6
  •   create  a task under  /home/student/playbooks/db.yml
  •   this task must install  mariadb database and start the service
  •   now create a playbook where import the db.yml first 
  •   if imported task runs successfully then install  httpd server and host a sample check.html with content  "hello import" 
  •  if imported task if failed then give error message "database is configured"

Comments

  1. Azure DevOpsAugust 14, 2019 at 4:19 AM

    Thanks for providing such a great information.
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  3. ramya_kSeptember 26, 2022 at 11:42 PM

    Hi Team,Your problems was quiet Intresting and little intresting to execute it, and procedure given was very useful to execute...thank you for the providing informative content, keep doing!!! For getting DevOps Training in Chennai contact us...

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  4. iteducationcentreDecember 8, 2023 at 1:28 AM

    Thanks for the information.it was worth reading.
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