There are two files in this repo i.e mj_Autoinstall.sh and Vagrantfile and are meant for novice linux users to practice simple devops project.
[I have added automation of both files in AUTO branch]
​
If You have any queries ping me on knowledgeira@gmail.com,this is meant for people who are new to linux world.

**********************************************************************************************Part1: Vagrantfile****************************************************************************************************
Vagrant file creates two ubuntu20 VM's effortlessly and assigns 192.168.100.100,192.168.100.200 and other file is simple bash script which install basic Devops packages on ubuntu20.  Basically vagrant automates the installation process which otherwise would consume lot of time.

Usually creating OS on Virtual box manually consumes time hence vagranfile simplifies it. Before running ur vagrant boxes, you need vagrant and virtual box packages installed on ur host OS i.e current OS as well as atleast 9-10th gen i5 or ryzen 3(minimum ryzen2) for respectable performance.The machine uses 2gb each , but you can configure it from vagrantfile(edit) to 512 mb as well.

It just starts 2 ubuntu20.04 LTS VM's. With respect to Devops project, you can use one as  build server i.e where you app is build  with the help of jenkin's maven etc and you can use other VM as  application server i.e deploy your app to apache, tomcat etc. IN ansible project you can use one as controller and other as  sqlserveri or anyother node. You can use for kubernetes practice if you have more sources. you can read file and copy paste saem config in vagrant file to increase the nodes.


After cloning this repo or downloading zip archive , exctract the archive and  copy the Vagrant file to some independent folder.

then you can run vagrant up (from folder which has this file). vagrant status , vagrant ssh
 

For example check the following,(make sure you have both softwares installed first)

root@ALienIra:/home/mj/MyStuff/vagrant# vboxmanage --version
6.1.16r140961
root@ALienIra:/home/mj/MyStuff/vagrant# vagrant --version
Vagrant 2.2.6

I dl this repo and copied the Vagrant file to folder on my local laptop
root@ALienIra:/home/mj/MyStuff/vagrant# ls
Vagrantfile

NOW run vagrant up there.
root@ALienIra:/home/mj/MyStuff/vagrant# vagrant up
root@ALienIra:/home/mj/MyStuff/vagrant# vagrant status
Current machine states:

ubuntu1                   running (virtualbox)
ubuntu2                   running (virtualbox)

NOw to access machine's via ssh, use vagrant ssh ubuntu1/2  -->default password is vagrant.

oot@ALienIra:/home/mj/MyStuff/vagrant# vagrant status
Current machine states:

ubuntu1                   running (virtualbox)
ubuntu2                   running (virtualbox)

This environment represents multiple VMs. The VMs are all listed
above with their current state. For more information about a specific
VM, run `vagrant status NAME`.
root@ALienIra:/home/mj/MyStuff/vagrant# vagrant ssh-config
Host ubuntu1
  HostName 127.0.0.1
  User vagrant
  Port 2222
  UserKnownHostsFile /dev/null
  StrictHostKeyChecking no
  PasswordAuthentication no
  IdentityFile /home/mj/MyStuff/vagrant/.vagrant/machines/ubuntu1/virtualbox/private_key
  IdentitiesOnly yes
  LogLevel FATAL

Host ubuntu2
  HostName 127.0.0.1
  User vagrant
  Port 2200
  UserKnownHostsFile /dev/null
  StrictHostKeyChecking no
  PasswordAuthentication no
  IdentityFile /home/mj/MyStuff/vagrant/.vagrant/machines/ubuntu2/virtualbox/private_key
  IdentitiesOnly yes
  LogLevel FATAL

Alternatively you can use: sshpass -p vagrant ssh vagrant@localhost -p 2222

You need sshpass to be installed. For frist time you may need to login normally or set stricthostkeychecking setting to NO

You can also use key which is inside .vagrant folder.

root@ALienIra:/home/mj/MyStuff/vagrant# vagrant ssh ubuntu1

If you want only one machine then you can shutdown using halt or completely remove/destory anyone machine or start only one machine like : 

root@ALienIra:/home/mj/MyStuff/vagrant# vagrant up ubuntu1


root@ALienIra:/home/mj/MyStuff/vagrant# vagrant halt ubuntu2
==> ubuntu2: Attempting graceful shutdown of VM...
root@ALienIra:/home/mj/MyStuff/vagrant# vagrant status
Current machine states:

ubuntu1                   running (virtualbox)
ubuntu2                   poweroff (virtualbox)

This environment represents multiple VMs. The VMs are all listed
above with their current state. For more information about a specific
VM, run `vagrant status NAME`.
root@ALienIra:/home/mj/MyStuff/vagrant# vagrant destroy ubuntu2
    ubuntu2: Are you sure you want to destroy the 'ubuntu2' VM? [y/N] y
==> ubuntu2: Destroying VM and associated drives...




***************************************************************************************Part2:mj_autoinstall.sh************************************************************************************************


I have created a simple shady script (simple bash commands meant for novice user) which installs 8 packages on UBUNTU 20 instance. Ansible MAVEN,TOMCAT,JENKIN"S,DOcker as of Jan2021. This also make's sure/installs git,JDK 11,dockercompose . THE $PATH is set and everything is cross-compatible(like maven with jenkins w.r.t java etc) and would be finally  up and running after you run it.

You can freely modify/read the script and check what it does to understand better what exactly is happening under the hood.

I encourage you to run the commands given in the script manually and understand it by taking online help.Once you have good understanding of how software get's installed, you can auto run it later.

If you are in hurry for practicing devop's project, it will save your time else it's just a very simple script.

You can run this script in any UBUNTU 20.04.x instance , for example :  VM running Ubuntu20, Amazon ubuntu 20 AMI image instance  (if you overboard , you can be charged in AWS as this downloads packages from Internet), you can run this on Ubuntu 20 container image, setup vagrant box ubuntu 20 etc and run on these instances.

This is the very reason I created a Vagrant file which created 2 vm's , anytime you can delete,halt play around


This is idempotent i.e you can run many times and it will still work, it will hog some bandwidth and utilize Internet Download , so care about online free tier account.


All you need after dling repo ,is just run following command .

On you laptop which has git (lol)(ironically this script install's git too) (else just normal download zip option in upper right corner of Git hub), do

git clone git@github.com:knowledgeira/mj_devops.git

cd mj_devops and run following command.


chmod +x mj_Autoinstall.sh  ------------>.This sets the execute bit for all users or you can chmod 700,chmod 777 and run script , please avoid using sudo(you can if u want to) while running scirpt.

source mj_Autoinstall.sh

After running Script: 

In the end you can skip or try : mvn --version , and run following if you dont get op .

source /etc/profile.d/mjenv.sh


TOMCAT and MAVEN will be installed in /opt/respective-dir

JAVA,MAVEN env variables are set but later for anyother user if you need, you can run following command for it.

source /etc/profile.d/mjenv.sh


==================What to expect after running script=====================



Dont worry about systemctl status of jenkins.You can access Jenkins via curl localhost:8080 or just in browser type 127.x.x.x :8080 where x is anything between (0-254)/localhost.

Tomcat is used if you are using JSP/java container for running java apps. It can be accessed via curl or browser localhost:8081.


-----------------------------------------------------You will get similar op on screen after running script-----------------------------------------------


===================================================
 Package 1: Checking Java version

java --version

openjdk 11.0.9.1 2020-11-04
OpenJDK Runtime Environment (build 11.0.9.1+1-Ubuntu-0ubuntu1.20.04)
OpenJDK 64-Bit Server VM (build 11.0.9.1+1-Ubuntu-0ubuntu1.20.04, mixed mode, sharing)

=====================================================================================


Package 2: Checking tomcat status
Systemctl status tomcat

     Loaded: loaded (/etc/systemd/system/tomcat.service; enabled; vendor preset: enabled)
     Active: active (running) since Wed 2021-01-06 16:58:56 UTC; 3min 24s ago
   Main PID: 5835 (java)
      Tasks: 30 (limit: 1164)
      
===================================================


 Package 3: Checking Maven version

mvn --version 

Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: /opt/maven
Java version: 11.0.9.1, vendor: Ubuntu, runtime: /usr/lib/jvm/java-11-openjdk-amd64
Default locale: en, platform encoding: UTF-8
OS name: "linux", version: "5.4.0-1029-aws", arch: "amd64", family: "unix"

===================================================


 Package 4: Checking Docker Compose and Docker version

docker --version 

Docker version 20.10.2, build 2291f61
docker-compose version 1.27.4, build 40524192
Your root directory for docker files and it's current size.
244K	/var/lib/docker

===================================================


 Package 5: Checking Git Version

Git --version 

git version 2.25.1

===================================================


 Package 6: Checking Jenkin status 

Systemctl status jenkin

     Loaded: loaded (/etc/init.d/jenkins; generated)
     Active: active (exited) since Wed 2021-01-06 17:01:22 UTC; 59s ago
       Docs: man:systemd-sysv-generator(8)
      Tasks: 0 (limit: 1164)
===================================================


 Package 7:Ansible  status 

ansible 2.9.6


Remember perfection is just an illusion


-------------------------You may need to set the specific versions of maven,git etc in manage Jenkins-->Global tool configuration in Jenkins------