#Heroku  #Hosting  #DevOps 

Deployment on Heroku

  • Heroku is a Platform as a service(PaaS)
  • Which abstracts us from dealing with servers, all we have to do is sign up,
  • Download a few tools and then upload our code to the platform effortlessly

Deployment way

  • We need to format/create some files according to Heroku for deployment
  • Two ways of Deployment
    • Using Github
    • Using CLI

Using github

  • Connect your GitHub with Heroku app
  • Select the branch
  • Deploy
  • After successful build, website will be live

Using CLI

  • Install and Connect Heroku CLI
sudo snap install --classic heroku
heroku --version
heroku login
  • Connect repo with Heroku app
git init
# heroku git:remote -a app_name
heroku git:remote -a blogpost-dj
git add .
git commit -am "make it better"
git push heroku master
  • After successful build website will be live

Get App info using CLI

  • Get all the env vars
# heroku config --app=heroku_app_name
heroku config --app=blogpost-dj

Deploy static app

  • We need to use a trick and tell Heroku that our website is a PHP application.
  • Steps to deploy static page on Heroku
  1. Create index.php file
    • Heroku will search form main/index page in index.php
Refer your main/index in index.php
# index.php
<?php include_once("home.html"); ?>
  1. Create composer.json file
    • Empty json file
    • echo '{}' > composer.json

Django app deployment

  1. Create Procfile
    • It defines process types and explicitly declare what command should be executed to start your app.
# Procfile
# web: gunicorn django_app_name.wsgi --log-file -
web: gunicorn blogpost.wsgi --log-file -
  1. Add runtime.txt 
python-3.6.1
  1. Add a requirements.txt file
    • pip freeze > requirements.txt
    • Includes all the packages required to run the app
  2. Database
    • Resource > Add ons > Heroku Postgres
    • Get db_url from Setting > Reveal Config Vars
  3. Additional Packages required
    • pip install gunicorn dj-database-url whitenoise psycopg2
    • All them in requirements.txt file
  4. Deploy on Heroku using GitHub or CLI
  5. Migrate
heroku login
# heroku run puthon manage.py migrate --app=heroku_app_name
heroku run puthon manage.py migrate --app=blogpost-dj

Heroku Postgres

  • Get DB URL
    • heroku pg:credentials:url

Heroku db access using Web

Heroku db access using CLI

  • Access your app Database using CLI
heroku pg:psql --app=blogpost-dj
select * from auth_user;
\q

Heroku db access GUI Client

  • DATABASE_URL: postgres://{username}:{password}@{hostname}:{port}/{dbname}
  • Now add those details to your GUI app

Heroku Dynos

  • heroku ps:scale web=1
  • heroku ps:scale worker=1
  • heroku ps:stop run.9296

Custom Heroku Domain Names

Reference