RoR Deployment on Google Cloud Platform

-

 

Overview

This application is a simple web application-based login form implemented with Ruby on Rails where Ruby is an interpreted, high level, object oriented programming language and Rails is a framework. 

The application is deployed on Google Cloud Platform.

Goals

  1. Application accepts username and password. For valid credentials, it displays a message “Login successful! You are logged in as (loggedin_username) ”

  2. Valid logged in users can log out successfully .

  3. Application accepts username and password. For invalid credentials, it displays a message “Authentication failed! Please enter correct credentials.”

Specifications

Programming language : Ruby 

Web application framework : Rails (MVC)

Deployment : Google Cloud Platform

Source code : https://github.com/amrutapednekar/authentication_app

Deployment on Google Cloud Platform

  1. New project

Created a new project on Google Cloud Platform. 



  1. Open cloud shell terminal

  2. Clone application code

Application code is cloned from git repository to the Cloud shell.

  1. Ruby installation version 2.7.3

Installed ruby version 2.7.3. Command “ruby -v” shows installed ruby version  2.7.3


  1. Installation of other dependencies and gems

Command “bundle install” helps to install all other dependencies and required gems that we already listed in GemFile.rb 

  1. Application is running on GCP

Command “rails s -p 8080” runs application on port number 8080

Use cases

  1. Login form

Once an application is deployed , it displays a login form. First textfield is to enter username and second password field is to enter password. 

Server logs





  1. First user enters username and password

User enters the username and a valid password. As it is secured, inserted  password is not displayed. 

User clicks on the Login button.

Server logs




  1. User logged in successfully 

Application verifies logged in credentials with credentials already saved in the system. 

If credentials match, , the user logs in successfully.  

It displays the message “Login successful! You are logged in as --------”.

System displays username successfully.

User logs out. Server logs

4.User enters incorrect credentials 


4. Third user enters incorrect credentials

User enters a wrong username and a  password. As it is secured, the inserted  password is not displayed. 

User clicks on the Login button.

Server logs

4. User log in unsuccessfully 

5. User log in unsuccessfully

Application verifies logged in credentials with credentials already saved in the system. As credentials don't match, the user login unsuccessfully.  

It displays the error message in red color “Authentication failed! Please enter correct credentials.”

User remains on the login page.


Comments

Post a Comment

Popular posts from this blog

PERSONAL ACCESS TOKEN ON GITHUB

-
Image
  PERSONAL ACCESS TOKEN ON GITHUB  PURPOSE While doing git clone or git pull if you face and issue and getting below error  remote: Support for password authentication was removed on August 13, 2021. Please use a personal access token instead. You have to create a personal access token with your git handle. Authentic in terminal with this PAT ( personal access token) REASON While doing any git operation, now GitHub is  not accepting authentication with password  You need to add PAT. Follow below steps to create PAT and authenticate on your local machine STEPS  CREATE PERSONAL ACCESS TOKEN Login to GitHub from the browser. Go to Settings - > Developer setting -> Personal access token -> Create new token Authenticate Full out required fields Select expiration period We want to access the repository from the command line. For this don't forget to  select "repo" option Click "Generate token" Copy generated token. Your tokens are like your password...
Read more

PostgreSQL Commands

-
  Select Statement   select * from users;  - Selects all column select username from users;  - Selects only username column    select * from users limit 10;  - Selects only first 10 records Here column name is case insensitive  e.g username = USERNAME Columns name with space in between must be same as what is stored in database  e.g.  “User Name” is not equal to “user name”. You should enter “User Name” in query Where Filter   select * from users where country=’europe’;  - Selects all column from users table whose country column values is europe select * from users where country=’europe’ limit 10; - Selects first 10 records from users table whose country column values is europe select * from users where “Annual Salary” > 10000; Use logical operator on number columns to perform numeric operations select * from users where Extract(Year from to_date(birthdate, “MM/DD/YYYY”))=2015 limit 10; Selects first 10 users whose birt...
Read more

Rails Application with Docker

-
Image
Creating Rails App We are creating a rails application without installing rails on our system Create a folder on machine where we want to create Rails app Linux  mkdir ~/docker_rails cd  ~/docker_rails Windows  mkdir docker_rails cd docker_rails Create docker container based on image ruby:2.6   docker run -i -t --rm -v ${PWD}:/usr/src/app ruby:2.6 bash   Where docker run creates a container -i -t OR  -it :    --rm : It's a throwaway container  -v Mounts volume to share local system with container  ${PWD} :  Unix environment variable pointed to current directory Windows user should give current directory path as below docker run -i -t --rm -v C:/Users/amrut/OneDrive/Desktop/Amruta/docker_rails :/usr/src/app ruby:2.6 bash   ${PWD}:/usr/src/app : Mount the current directory inside the container at /usr/src/app Ruby:2.6 Reference docker image bash   After running this command , we can see  root@05d3878962ce:/# This shows...
Read more