Heroku

Question 1

What is the basic instance/container used in Heroku?

Answer 1

Dyno

Question 2

All dynos are ___ instances

Answer 2

Amazon EC2

Question 3

What are the 2 types of workers?

Answer 3

Web, worker

Question 4

What is heroku good for?

Answer 4

Small scale web development

Question 5

What are the pros of using heroku?

Answer 5

• Plug & play applications
• Full Git integration
• Docker integration

Question 6

What are web processes dynos responsible for?

Answer 6

Serving the web app to the end client

Question 7

What are worker processes dynos responsible for?

Answer 7

Non-web related work

Question 8

What files are required to make a web app with Heroku?

Answer 8

• Procfile
• requirements.txt
• runtime.txt
• webapp.py

Question 9

What does the runtime.txt file specify?

Answer 9

The language/runtime to use

Question 10

What does the requirements.txt file specify?

Answer 10

Specifies modules/libraries to install in the environment

Question 11

What does the Procfile specify?

Answer 11

Contains the command(s) we want to run when our application is deployed

Question 12

What does the webapp.py file specify?

Answer 12

Web application code

Question 13

What are the commands for deploying with Git?

Answer 13

git init
git add .
heroku create
git push heroku master

Question 14

What do we need to use to have a persistent database?

Answer 14

PostgreSQL

Question 15

How do we need to adjust our files to include PostgreSQL

Answer 15

requirements. txt: psycopg2

webapp. py: import psycopg2

Question 16

What is the command for scaling workers?

Answer 16

heroku ps:scale worker=1

Question 17

What are clock dynos responsible for?

Answer 17

Schedule tasks at intervals, or at period times

Question 18

How do we need to adjust our files to include clocks?

Answer 18

Procfile: clock: python scheduledjob.py
requirements.txt: apscheduler
txlocal<3.0

Question 19

What is apscheduler responsible for?

Answer 19

Calls a function on a specified time interval using a blocking scheduling system

Question 20

What is the command for scaling clocks?

Answer 20

heroku ps:scale clock=1

Question 21

What does environ[‘PATH_INFO’] return?

Answer 21

A string representing the path requested by the client

Question 22

What does environ[‘REMOTE_ADDR’] return?

Answer 22

Gets the client’s IP address

Question 23

What does environ[‘QUERY_STRING’] return?

Answer 23

GET query string sent by the client