This document provides an introduction and overview of Heroku, an application deployment platform. It describes how Heroku allows developers to deploy and scale web apps through a process model using dynos and dyno manifolds without having to manage servers. Developers can use Heroku's command line interface to deploy apps through git pushes, connect add-on services, view logs, and manage dynos. Heroku also offers usage-based billing and free dyno hours for basic usage.

2. Introduction to
HEROKU

3. Agenda
Cloud Computing and Heroku
Process Model
Dynos Manifold
Deployment Stack
Add-on Services
Usage and Billing
CLI

4. Cloud Computing and Heroku
Cloud computing is a general term for
anything that involves delivering hosted
services over the Internet.
SAAS
PAAS
IAAS

5. Heroku
A new way of building and deploying web
apps
Spend 100% of your time on application
code
Forget managing servers, deployment,
ongoing operations, or scaling

6. How it works?
Deploy – Just a git push
Connect – Add 3rd party resources
Command – Use CLI/web interface
Observe – All activities logged using Logplex
Scale – Independent scaling of components
Relax - Takes full responsibility for your app's health.

7. Git with Heroku

8. Process Model
Process Type
Web : web application.
Worker : timed jobs and queuing systems.
Each app has a set of running processes
and the processes are instantiated using
'Process Type' as prototype.

9. Process Model cont...

10. Dyno
Basic unit of composition on Heroku.
A lightweight container running a single user-
specified command/process.
Possible commands
– Web processes
– Worker processes
– Other processes defined in Procfile

11. Dyno composition
Your app
Framework support
Config vars
Own file system for temp usage
512MB of RAM

12. Dyno Manifold
Provides an
environment for your
app's dynos:
• distributed
• fault-tolerant
• horizontally scalable
Tasks
• restarting faulty dyno
• checking for idle dyno
• restarting on config
change

13. Deployment Stack
A stack is a complete deployment
environment including :
base operating system
language runtime
associated libraries.

14. Popular add-on services
Elasticsearch: Big Data
Search Simplified

15. Usage & Billing
Usage is computed from wall-clock time, not
CPU time
Current charge : $0.05 per hour per dyno
Each app gets 750 free dyno-hours/month
– run 1 dyno for an entire month for free
OR
– run 2 dynos for 1/2 of a month
 Add-on services have their own charges

17. Get ready
Register here
https://api.heroku.com/signup/devcenter
Install Heroku Toolbelt (CLI) from
https://toolbelt.heroku.com/
Or if you use Ubuntu then :
wget -qO- https://toolbelt.heroku.com/install-ubuntu.sh | sh

18. Sample commands
heroku help
heroku login
heroku create --stack cedar
heroku apps:rename newname
heroku apps:rename newname --app oldname
(http://newname.heroku.com/ | git@heroku.com:newname.git)
git push heroku master
heroku logs -t

19. Sample commands (git)
add heroku remote to existing project
git remote add heroku git@heroku.com:project.git
push different project code on existing heroku app
git push --force heroku master
Deploy git 'yourbranch' instead of master
git push heroku yourbranch:master
Remove heroku remote from the project
git remote rm heroku

20. Sample commands (config)
See all the config available for your project
heroku config
Add a key-value pair to config
heroku config:add COMPANY='Intelligrape Software'
Remove keys from config
sheroku config:remove COMPANY OTHER_VAR
//config variables are available as System properties on heroku.
// in Java/Groovy System.getenv('COMPANY')

21. Sample commands (sharing)
Change owner of the heroku project
heroku sharing:transfer owner@xyz.com
Add collaborator
heroku sharing:add my_email@xyz.com
Remove collaborator
heroku sharing:remove my_email@xyz.com

22. Sample commands (process)
See all running processes
heroku ps
watch heroku ps
Restart all dynos
heroku restart
Run bash shell
heroku run bash

23. Sample commands (add-ons)
heroku addons:list
heroku addons:add heroku-postgresql
heroku pg:wait
heroku addons:remove heroku-postgresql

24. Heroku postgres-db commands
heroku pg:info
heroku pg:credentials COLOR
heroku pg:psql

25. Heroku postgres backup
heroku addons:add pgbackups
heroku addons:add pgbackups:plus #plus plan
heroku addons:add pgbackups:auto-week #auto-week plan
heroku pgbackups:capture #default database backup creation
heroku pgbackups:capture HEROKU_POSTGRESQL_PINK #selected database backup
heroku pgbackups:capture --expire # delete manual oldest backup
heroku pgbackups # see backups b indicates manual and a indicates auto
heroku pgbackups:url b004 # provides a 10 minute backup download public url
heroku pgbackups:destroy b003 # delete a backup
heroku pgbackups:restore DATABASE b251 # restore backup to DATABASE
heroku pgbackups:restore HEROKU_POSTGRESQL_PINK b251 #restore to PINK database

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27. Thank you :)